diff --git a/include/common/tglobal.h b/include/common/tglobal.h
index cb4426f8a9..7df6124152 100644
--- a/include/common/tglobal.h
+++ b/include/common/tglobal.h
@@ -119,6 +119,7 @@ extern SDiskCfg tsDiskCfg[];
 // udf
 extern bool tsStartUdfd;
 extern char tsUdfdResFuncs[];
+extern char tsUdfdLdLibPath[];
 
 // schemaless
 extern char tsSmlChildTableName[];
diff --git a/include/libs/sync/sync.h b/include/libs/sync/sync.h
index 95ee2ca2bc..1a94dcf426 100644
--- a/include/libs/sync/sync.h
+++ b/include/libs/sync/sync.h
@@ -200,10 +200,10 @@ typedef struct SSyncInfo {
 
 int32_t     syncInit();
 void        syncCleanUp();
+bool        syncIsInit();
 int64_t     syncOpen(SSyncInfo* pSyncInfo);
 void        syncStart(int64_t rid);
 void        syncStop(int64_t rid);
-int32_t     syncSetStandby(int64_t rid);
 ESyncState  syncGetMyRole(int64_t rid);
 bool        syncIsReady(int64_t rid);
 const char* syncGetMyRoleStr(int64_t rid);
@@ -216,7 +216,6 @@ void        syncGetEpSet(int64_t rid, SEpSet* pEpSet);
 void        syncGetRetryEpSet(int64_t rid, SEpSet* pEpSet);
 int32_t     syncPropose(int64_t rid, SRpcMsg* pMsg, bool isWeak);
 // int32_t     syncProposeBatch(int64_t rid, SRpcMsg** pMsgPArr, bool* pIsWeakArr, int32_t arrSize);
-bool        syncEnvIsStart();
 const char* syncStr(ESyncState state);
 bool        syncIsRestoreFinish(int64_t rid);
 int32_t     syncGetSnapshotByIndex(int64_t rid, SyncIndex index, SSnapshot* pSnapshot);
@@ -234,6 +233,9 @@ int32_t syncEndSnapshot(int64_t rid);
 
 int32_t syncStepDown(int64_t rid, SyncTerm newTerm);
 
+SSyncNode* syncNodeAcquire(int64_t rid);
+void       syncNodeRelease(SSyncNode* pNode);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/include/libs/sync/syncTools.h b/include/libs/sync/syncTools.h
index 5e9e70aa19..e39d45b061 100644
--- a/include/libs/sync/syncTools.h
+++ b/include/libs/sync/syncTools.h
@@ -28,10 +28,6 @@ typedef struct SRaftId {
   SyncGroupId vgId;
 } SRaftId;
 
-// ------------------ control -------------------
-SSyncNode* syncNodeAcquire(int64_t rid);
-void       syncNodeRelease(SSyncNode* pNode);
-
 int32_t syncGetRespRpc(int64_t rid, uint64_t index, SRpcMsg* msg);
 int32_t syncGetAndDelRespRpc(int64_t rid, uint64_t index, SRpcHandleInfo* pInfo);
 void    syncSetMsgCb(int64_t rid, const SMsgCb* msgcb);
diff --git a/include/util/tref.h b/include/util/tref.h
index c2cc54cb07..c4b2ec8fa7 100644
--- a/include/util/tref.h
+++ b/include/util/tref.h
@@ -25,7 +25,8 @@ extern "C" {
 
 // open a reference set, max is the mod used by hash, fp is the pointer to free resource function
 // return rsetId which will be used by other APIs. On error, -1 is returned, and terrno is set appropriately
-int32_t taosOpenRef(int32_t max, void (*fp)(void *));
+typedef void (*RefFp)(void *);
+int32_t taosOpenRef(int32_t max, RefFp fp);
 
 // close the reference set, refId is the return value by taosOpenRef
 // return 0 if success. On error, -1 is returned, and terrno is set appropriately
diff --git a/source/common/src/tglobal.c b/source/common/src/tglobal.c
index fbb9e04a25..660730f0dc 100644
--- a/source/common/src/tglobal.c
+++ b/source/common/src/tglobal.c
@@ -163,7 +163,8 @@ int32_t tsTtlUnit = 86400;
 int32_t tsTtlPushInterval = 86400;
 int32_t tsGrantHBInterval = 60;
 int32_t tsUptimeInterval = 300;     // seconds
-char    tsUdfdResFuncs[1024] = "";  // udfd resident funcs that teardown when udfd exits
+char    tsUdfdResFuncs[512] = "";  // udfd resident funcs that teardown when udfd exits
+char    tsUdfdLdLibPath[512] = "";
 
 #ifndef _STORAGE
 int32_t taosSetTfsCfg(SConfig *pCfg) {
@@ -424,6 +425,7 @@ static int32_t taosAddServerCfg(SConfig *pCfg) {
 
   if (cfgAddBool(pCfg, "udf", tsStartUdfd, 0) != 0) return -1;
   if (cfgAddString(pCfg, "udfdResFuncs", tsUdfdResFuncs, 0) != 0) return -1;
+  if (cfgAddString(pCfg, "udfdLdLibPath", tsUdfdLdLibPath, 0) != 0) return -1;
   GRANT_CFG_ADD;
   return 0;
 }
@@ -722,7 +724,7 @@ static int32_t taosSetServerCfg(SConfig *pCfg) {
 
   tsStartUdfd = cfgGetItem(pCfg, "udf")->bval;
   tstrncpy(tsUdfdResFuncs, cfgGetItem(pCfg, "udfdResFuncs")->str, sizeof(tsUdfdResFuncs));
-
+  tstrncpy(tsUdfdLdLibPath, cfgGetItem(pCfg, "udfdLdLibPath")->str, sizeof(tsUdfdLdLibPath));
   if (tsQueryBufferSize >= 0) {
     tsQueryBufferSizeBytes = tsQueryBufferSize * 1048576UL;
   }
diff --git a/source/dnode/mnode/impl/src/mndMain.c b/source/dnode/mnode/impl/src/mndMain.c
index 98a24286f6..53e7b1cd26 100644
--- a/source/dnode/mnode/impl/src/mndMain.c
+++ b/source/dnode/mnode/impl/src/mndMain.c
@@ -481,7 +481,7 @@ int32_t mndProcessSyncCtrlMsg(SRpcMsg *pMsg) {
 
   mInfo("vgId:%d, process sync ctrl msg", 1);
 
-  if (!syncEnvIsStart()) {
+  if (!syncIsInit()) {
     mError("failed to process sync msg:%p type:%s since syncEnv stop", pMsg, TMSG_INFO(pMsg->msgType));
     terrno = TSDB_CODE_SYN_INTERNAL_ERROR;
     return -1;
@@ -518,7 +518,7 @@ int32_t mndProcessSyncMsg(SRpcMsg *pMsg) {
   SSyncMgmt *pMgmt = &pMnode->syncMgmt;
   int32_t    code = 0;
 
-  if (!syncEnvIsStart()) {
+  if (!syncIsInit()) {
     mError("failed to process sync msg:%p type:%s since syncEnv stop", pMsg, TMSG_INFO(pMsg->msgType));
     terrno = TSDB_CODE_SYN_INTERNAL_ERROR;
     return -1;
@@ -581,11 +581,6 @@ int32_t mndProcessSyncMsg(SRpcMsg *pMsg) {
     code = syncNodeOnSnapshotReply(pSyncNode, pSyncMsg);
     syncSnapshotRspDestroy(pSyncMsg);
 
-  } else if (pMsg->msgType == TDMT_SYNC_SET_MNODE_STANDBY) {
-    code = syncSetStandby(pMgmt->sync);
-    SRpcMsg rsp = {.code = code, .info = pMsg->info};
-    tmsgSendRsp(&rsp);
-
   } else if (pMsg->msgType == TDMT_SYNC_LOCAL_CMD) {
     SyncLocalCmd *pSyncMsg = syncLocalCmdFromRpcMsg2(pMsg);
     code = syncNodeOnLocalCmd(pSyncNode, pSyncMsg);
diff --git a/source/dnode/mnode/impl/src/mndSync.c b/source/dnode/mnode/impl/src/mndSync.c
index df4b526775..6853ff5ccc 100644
--- a/source/dnode/mnode/impl/src/mndSync.c
+++ b/source/dnode/mnode/impl/src/mndSync.c
@@ -17,11 +17,44 @@
 #include "mndSync.h"
 #include "mndTrans.h"
 
-static int32_t mndSyncEqMsg(const SMsgCb *msgcb, SRpcMsg *pMsg) {
+static int32_t mndSyncEqCtrlMsg(const SMsgCb *msgcb, SRpcMsg *pMsg) {
+  if (pMsg == NULL || pMsg->pCont == NULL) {
+    return -1;
+  }
+
   SMsgHead *pHead = pMsg->pCont;
   pHead->contLen = htonl(pHead->contLen);
   pHead->vgId = htonl(pHead->vgId);
 
+  if (msgcb == NULL || msgcb->putToQueueFp == NULL) {
+    rpcFreeCont(pMsg->pCont);
+    pMsg->pCont = NULL;
+    return -1;
+  }
+
+  int32_t code = tmsgPutToQueue(msgcb, SYNC_CTRL_QUEUE, pMsg);
+  if (code != 0) {
+    rpcFreeCont(pMsg->pCont);
+    pMsg->pCont = NULL;
+  }
+  return code;
+}
+
+static int32_t mndSyncEqMsg(const SMsgCb *msgcb, SRpcMsg *pMsg) {
+  if (pMsg == NULL || pMsg->pCont == NULL) {
+    return -1;
+  }
+
+  SMsgHead *pHead = pMsg->pCont;
+  pHead->contLen = htonl(pHead->contLen);
+  pHead->vgId = htonl(pHead->vgId);
+
+  if (msgcb == NULL || msgcb->putToQueueFp == NULL) {
+    rpcFreeCont(pMsg->pCont);
+    pMsg->pCont = NULL;
+    return -1;
+  }
+
   int32_t code = tmsgPutToQueue(msgcb, SYNC_QUEUE, pMsg);
   if (code != 0) {
     rpcFreeCont(pMsg->pCont);
@@ -212,7 +245,7 @@ int32_t mndInitSync(SMnode *pMnode) {
       .msgcb = NULL,
       .FpSendMsg = mndSyncSendMsg,
       .FpEqMsg = mndSyncEqMsg,
-      .FpEqCtrlMsg = NULL,
+      .FpEqCtrlMsg = mndSyncEqCtrlMsg,
   };
 
   snprintf(syncInfo.path, sizeof(syncInfo.path), "%s%ssync", pMnode->path, TD_DIRSEP);
diff --git a/source/dnode/vnode/src/vnd/vnodeSync.c b/source/dnode/vnode/src/vnd/vnodeSync.c
index bf665fd6db..11cea8e88a 100644
--- a/source/dnode/vnode/src/vnd/vnodeSync.c
+++ b/source/dnode/vnode/src/vnd/vnodeSync.c
@@ -234,7 +234,7 @@ int32_t vnodeProcessSyncCtrlMsg(SVnode *pVnode, SRpcMsg *pMsg, SRpcMsg **pRsp) {
   int32_t         code = 0;
   const STraceId *trace = &pMsg->info.traceId;
 
-  if (!syncEnvIsStart()) {
+  if (!syncIsInit()) {
     vGError("vgId:%d, msg:%p failed to process since sync env not start", pVnode->config.vgId, pMsg);
     terrno = TSDB_CODE_APP_ERROR;
     return -1;
@@ -277,7 +277,7 @@ int32_t vnodeProcessSyncMsg(SVnode *pVnode, SRpcMsg *pMsg, SRpcMsg **pRsp) {
   int32_t         code = 0;
   const STraceId *trace = &pMsg->info.traceId;
 
-  if (!syncEnvIsStart()) {
+  if (!syncIsInit()) {
     vGError("vgId:%d, msg:%p failed to process since sync env not start", pVnode->config.vgId, pMsg);
     terrno = TSDB_CODE_APP_ERROR;
     return -1;
@@ -370,7 +370,13 @@ int32_t vnodeProcessSyncMsg(SVnode *pVnode, SRpcMsg *pMsg, SRpcMsg **pRsp) {
 }
 
 static int32_t vnodeSyncEqCtrlMsg(const SMsgCb *msgcb, SRpcMsg *pMsg) {
-  if (msgcb == NULL) {
+  if (pMsg == NULL || pMsg->pCont == NULL) {
+    return -1;
+  }
+
+  if (msgcb == NULL || msgcb->putToQueueFp == NULL) {
+    rpcFreeCont(pMsg->pCont);
+    pMsg->pCont = NULL;
     return -1;
   }
 
@@ -383,7 +389,13 @@ static int32_t vnodeSyncEqCtrlMsg(const SMsgCb *msgcb, SRpcMsg *pMsg) {
 }
 
 static int32_t vnodeSyncEqMsg(const SMsgCb *msgcb, SRpcMsg *pMsg) {
-  if (msgcb == NULL) {
+  if (pMsg == NULL || pMsg->pCont == NULL) {
+    return -1;
+  }
+
+  if (msgcb == NULL || msgcb->putToQueueFp == NULL) {
+    rpcFreeCont(pMsg->pCont);
+    pMsg->pCont = NULL;
     return -1;
   }
 
diff --git a/source/libs/function/src/tudf.c b/source/libs/function/src/tudf.c
index ea59e92e98..459ee583a4 100644
--- a/source/libs/function/src/tudf.c
+++ b/source/libs/function/src/tudf.c
@@ -117,10 +117,29 @@ static int32_t udfSpawnUdfd(SUdfdData *pData) {
   char dnodeIdEnvItem[32] = {0};
   char thrdPoolSizeEnvItem[32] = {0};
   snprintf(dnodeIdEnvItem, 32, "%s=%d", "DNODE_ID", pData->dnodeId);
+
   float numCpuCores = 4;
   taosGetCpuCores(&numCpuCores);
   snprintf(thrdPoolSizeEnvItem, 32, "%s=%d", "UV_THREADPOOL_SIZE", (int)numCpuCores * 2);
-  char *envUdfd[] = {dnodeIdEnvItem, thrdPoolSizeEnvItem, NULL};
+
+  char pathTaosdLdLib[512] = {0};
+  size_t taosdLdLibPathLen = sizeof(pathTaosdLdLib);
+  uv_os_getenv("LD_LIBRARY_PATH", pathTaosdLdLib, &taosdLdLibPathLen);
+
+  char udfdPathLdLib[1024] = {0};
+  size_t udfdLdLibPathLen = strlen(tsUdfdLdLibPath);
+  strncpy(udfdPathLdLib, tsUdfdLdLibPath, udfdLdLibPathLen);
+  udfdPathLdLib[udfdLdLibPathLen] = ':';
+  strncpy(udfdPathLdLib + udfdLdLibPathLen + 1, pathTaosdLdLib, sizeof(udfdPathLdLib) - udfdLdLibPathLen);
+  if (udfdLdLibPathLen + taosdLdLibPathLen < 1024) {
+    fnInfo("udfd LD_LIBRARY_PATH: %s", udfdPathLdLib);
+  } else {
+    fnError("can not set correct udfd LD_LIBRARY_PATH");
+  }
+  char ldLibPathEnvItem[1024 + 32] = {0};
+  snprintf(ldLibPathEnvItem, 1024 + 32, "%s=%s", "LD_LIBRARY_PATH", udfdPathLdLib);
+
+  char *envUdfd[] = {dnodeIdEnvItem, thrdPoolSizeEnvItem, ldLibPathEnvItem, NULL};
   options.env = envUdfd;
 
   int err = uv_spawn(&pData->loop, &pData->process, &options);
diff --git a/source/libs/sync/inc/syncEnv.h b/source/libs/sync/inc/syncEnv.h
index 06da0eb3df..55ce1470ce 100644
--- a/source/libs/sync/inc/syncEnv.h
+++ b/source/libs/sync/inc/syncEnv.h
@@ -20,13 +20,7 @@
 extern "C" {
 #endif
 
-#include <stdint.h>
-#include <stdio.h>
-#include <stdlib.h>
 #include "syncInt.h"
-#include "taosdef.h"
-#include "trpc.h"
-#include "ttimer.h"
 
 #define TIMER_MAX_MS         0x7FFFFFFF
 #define ENV_TICK_TIMER_MS    1000
@@ -57,12 +51,12 @@ typedef struct SSyncEnv {
 
 } SSyncEnv;
 
-extern SSyncEnv* gSyncEnv;
+SSyncEnv* syncEnv();
 
-int32_t syncEnvStart();
-int32_t syncEnvStop();
-int32_t syncEnvStartTimer();
-int32_t syncEnvStopTimer();
+int64_t    syncNodeAdd(SSyncNode* pNode);
+void       syncNodeRemove(int64_t rid);
+SSyncNode* syncNodeAcquire(int64_t rid);
+void       syncNodeRelease(SSyncNode* pNode);
 
 #ifdef __cplusplus
 }
diff --git a/source/libs/sync/inc/syncInt.h b/source/libs/sync/inc/syncInt.h
index f4949e1016..843dee1342 100644
--- a/source/libs/sync/inc/syncInt.h
+++ b/source/libs/sync/inc/syncInt.h
@@ -24,6 +24,8 @@ extern "C" {
 #include "syncTools.h"
 #include "tlog.h"
 #include "ttimer.h"
+#include "taosdef.h"
+#include "ttimer.h"
 
 // clang-format off
 #define sFatal(...) do { if (sDebugFlag & DEBUG_FATAL) { taosPrintLog("SYN FATAL ", DEBUG_FATAL, 255, __VA_ARGS__); }}     while(0)
@@ -255,9 +257,6 @@ void      syncNodeDoConfigChange(SSyncNode* pSyncNode, SSyncCfg* newConfig, Sync
 SyncIndex syncMinMatchIndex(SSyncNode* pSyncNode);
 char*     syncNodePeerState2Str(const SSyncNode* pSyncNode);
 
-SSyncNode* syncNodeAcquire(int64_t rid);
-void       syncNodeRelease(SSyncNode* pNode);
-
 // raft state change --------------
 void syncNodeUpdateTerm(SSyncNode* pSyncNode, SyncTerm term);
 void syncNodeUpdateTermWithoutStepDown(SSyncNode* pSyncNode, SyncTerm term);
@@ -302,9 +301,6 @@ bool syncNodeNeedSendAppendEntries(SSyncNode* ths, const SRaftId* pDestId, const
 int32_t syncGetSnapshotMeta(int64_t rid, struct SSnapshotMeta* sMeta);
 int32_t syncGetSnapshotMetaByIndex(int64_t rid, SyncIndex snapshotIndex, struct SSnapshotMeta* sMeta);
 
-void syncStartNormal(int64_t rid);
-void syncStartStandBy(int64_t rid);
-
 bool syncNodeCanChange(SSyncNode* pSyncNode);
 bool syncNodeCheckNewConfig(SSyncNode* pSyncNode, const SSyncCfg* pNewCfg);
 
diff --git a/source/libs/sync/src/syncEnv.c b/source/libs/sync/src/syncEnv.c
index fb0bfb8bef..c55cd4fdac 100644
--- a/source/libs/sync/src/syncEnv.c
+++ b/source/libs/sync/src/syncEnv.c
@@ -13,118 +13,111 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
+#define _DEFAULT_SOURCE
 #include "syncEnv.h"
-// #include <ASSERT.h>
+#include "tref.h"
 
-SSyncEnv *gSyncEnv = NULL;
+static SSyncEnv gSyncEnv = {0};
+static int32_t  gNodeRefId = -1;
+bool            gRaftDetailLog = false;
+static void     syncEnvTick(void *param, void *tmrId);
 
-// local function -----------------
-static SSyncEnv *doSyncEnvStart();
-static int32_t   doSyncEnvStop(SSyncEnv *pSyncEnv);
-static int32_t   doSyncEnvStartTimer(SSyncEnv *pSyncEnv);
-static int32_t   doSyncEnvStopTimer(SSyncEnv *pSyncEnv);
-static void      syncEnvTick(void *param, void *tmrId);
-// --------------------------------
+SSyncEnv *syncEnv() { return &gSyncEnv; }
 
-bool syncEnvIsStart() {
-  if (gSyncEnv == NULL) {
-    return false;
-  }
+bool syncIsInit() { return atomic_load_8(&gSyncEnv.isStart); }
 
-  return atomic_load_8(&(gSyncEnv->isStart));
-}
+int32_t syncInit() {
+  if (syncIsInit()) return 0;
 
-int32_t syncEnvStart() {
-  int32_t  ret = 0;
   uint32_t seed = (uint32_t)(taosGetTimestampNs() & 0x00000000FFFFFFFF);
   taosSeedRand(seed);
-  // gSyncEnv = doSyncEnvStart(gSyncEnv);
-  gSyncEnv = doSyncEnvStart();
-  ASSERT(gSyncEnv != NULL);
-  sTrace("sync env start ok");
-  return ret;
-}
 
-int32_t syncEnvStop() {
-  int32_t ret = doSyncEnvStop(gSyncEnv);
-  return ret;
-}
-
-int32_t syncEnvStartTimer() {
-  int32_t ret = doSyncEnvStartTimer(gSyncEnv);
-  return ret;
-}
-
-int32_t syncEnvStopTimer() {
-  int32_t ret = doSyncEnvStopTimer(gSyncEnv);
-  return ret;
-}
-
-// local function -----------------
-static void syncEnvTick(void *param, void *tmrId) {
-  SSyncEnv *pSyncEnv = (SSyncEnv *)param;
-  if (atomic_load_64(&pSyncEnv->envTickTimerLogicClockUser) <= atomic_load_64(&pSyncEnv->envTickTimerLogicClock)) {
-    ++(pSyncEnv->envTickTimerCounter);
-    sTrace("syncEnvTick do ... envTickTimerLogicClockUser:%" PRIu64 ", envTickTimerLogicClock:%" PRIu64
-           ", envTickTimerCounter:%" PRIu64
-           ", "
-           "envTickTimerMS:%d, tmrId:%p",
-           pSyncEnv->envTickTimerLogicClockUser, pSyncEnv->envTickTimerLogicClock, pSyncEnv->envTickTimerCounter,
-           pSyncEnv->envTickTimerMS, tmrId);
-
-    // do something, tick ...
-    taosTmrReset(syncEnvTick, pSyncEnv->envTickTimerMS, pSyncEnv, pSyncEnv->pTimerManager, &pSyncEnv->pEnvTickTimer);
-  } else {
-    sTrace("syncEnvTick pass ... envTickTimerLogicClockUser:%" PRIu64 ", envTickTimerLogicClock:%" PRIu64
-           ", envTickTimerCounter:%" PRIu64
-           ", "
-           "envTickTimerMS:%d, tmrId:%p",
-           pSyncEnv->envTickTimerLogicClockUser, pSyncEnv->envTickTimerLogicClock, pSyncEnv->envTickTimerCounter,
-           pSyncEnv->envTickTimerMS, tmrId);
-  }
-}
-
-static SSyncEnv *doSyncEnvStart() {
-  SSyncEnv *pSyncEnv = (SSyncEnv *)taosMemoryMalloc(sizeof(SSyncEnv));
-  ASSERT(pSyncEnv != NULL);
-  memset(pSyncEnv, 0, sizeof(SSyncEnv));
-
-  pSyncEnv->envTickTimerCounter = 0;
-  pSyncEnv->envTickTimerMS = ENV_TICK_TIMER_MS;
-  pSyncEnv->FpEnvTickTimer = syncEnvTick;
-  atomic_store_64(&pSyncEnv->envTickTimerLogicClock, 0);
-  atomic_store_64(&pSyncEnv->envTickTimerLogicClockUser, 0);
+  memset(&gSyncEnv, 0, sizeof(SSyncEnv));
+  gSyncEnv.envTickTimerCounter = 0;
+  gSyncEnv.envTickTimerMS = ENV_TICK_TIMER_MS;
+  gSyncEnv.FpEnvTickTimer = syncEnvTick;
+  atomic_store_64(&gSyncEnv.envTickTimerLogicClock, 0);
+  atomic_store_64(&gSyncEnv.envTickTimerLogicClockUser, 0);
 
   // start tmr thread
-  pSyncEnv->pTimerManager = taosTmrInit(1000, 50, 10000, "SYNC-ENV");
+  gSyncEnv.pTimerManager = taosTmrInit(1000, 50, 10000, "SYNC-ENV");
+  atomic_store_8(&gSyncEnv.isStart, 1);
 
-  atomic_store_8(&(pSyncEnv->isStart), 1);
-  return pSyncEnv;
-}
-
-static int32_t doSyncEnvStop(SSyncEnv *pSyncEnv) {
-  ASSERT(pSyncEnv == gSyncEnv);
-  if (pSyncEnv != NULL) {
-    atomic_store_8(&(pSyncEnv->isStart), 0);
-    taosTmrCleanUp(pSyncEnv->pTimerManager);
-    taosMemoryFree(pSyncEnv);
+  gNodeRefId = taosOpenRef(200, (RefFp)syncNodeClose);
+  if (gNodeRefId < 0) {
+    sError("failed to init node ref");
+    syncCleanUp();
+    return -1;
   }
-  gSyncEnv = NULL;
+
+  sDebug("sync rsetId:%d is open", gNodeRefId);
   return 0;
 }
 
-static int32_t doSyncEnvStartTimer(SSyncEnv *pSyncEnv) {
-  int32_t ret = 0;
-  taosTmrReset(pSyncEnv->FpEnvTickTimer, pSyncEnv->envTickTimerMS, pSyncEnv, pSyncEnv->pTimerManager,
-               &pSyncEnv->pEnvTickTimer);
-  atomic_store_64(&pSyncEnv->envTickTimerLogicClock, pSyncEnv->envTickTimerLogicClockUser);
-  return ret;
+void syncCleanUp() {
+  atomic_store_8(&gSyncEnv.isStart, 0);
+  taosTmrCleanUp(gSyncEnv.pTimerManager);
+  memset(&gSyncEnv, 0, sizeof(SSyncEnv));
+
+  if (gNodeRefId != -1) {
+    sDebug("sync rsetId:%d is closed", gNodeRefId);
+    taosCloseRef(gNodeRefId);
+    gNodeRefId = -1;
+  }
 }
 
-static int32_t doSyncEnvStopTimer(SSyncEnv *pSyncEnv) {
+int64_t syncNodeAdd(SSyncNode *pNode) {
+  pNode->rid = taosAddRef(gNodeRefId, pNode);
+  if (pNode->rid < 0) return -1;
+
+  sDebug("vgId:%d, sync rid:%" PRId64 " is added to rsetId:%d", pNode->vgId, pNode->rid, gNodeRefId);
+  return pNode->rid;
+}
+
+void syncNodeRemove(int64_t rid) { taosRemoveRef(gNodeRefId, rid); }
+
+SSyncNode *syncNodeAcquire(int64_t rid) {
+  SSyncNode *pNode = taosAcquireRef(gNodeRefId, rid);
+  if (pNode == NULL) {
+    sTrace("failed to acquire node from refId:%" PRId64, rid);
+  }
+
+  return pNode;
+}
+
+void syncNodeRelease(SSyncNode *pNode) { taosReleaseRef(gNodeRefId, pNode->rid); }
+
+#if 0
+void syncEnvStartTimer() {
+  taosTmrReset(gSyncEnv.FpEnvTickTimer, gSyncEnv.envTickTimerMS, &gSyncEnv, gSyncEnv.pTimerManager,
+               &gSyncEnv.pEnvTickTimer);
+  atomic_store_64(&gSyncEnv.envTickTimerLogicClock, gSyncEnv.envTickTimerLogicClockUser);
+}
+
+void syncEnvStopTimer() {
   int32_t ret = 0;
-  atomic_add_fetch_64(&pSyncEnv->envTickTimerLogicClockUser, 1);
-  taosTmrStop(pSyncEnv->pEnvTickTimer);
-  pSyncEnv->pEnvTickTimer = NULL;
+  atomic_add_fetch_64(&gSyncEnv.envTickTimerLogicClockUser, 1);
+  taosTmrStop(gSyncEnv.pEnvTickTimer);
+  gSyncEnv.pEnvTickTimer = NULL;
   return ret;
 }
+#endif
+
+static void syncEnvTick(void *param, void *tmrId) {
+  SSyncEnv *pSyncEnv = param;
+  if (atomic_load_64(&gSyncEnv.envTickTimerLogicClockUser) <= atomic_load_64(&gSyncEnv.envTickTimerLogicClock)) {
+    gSyncEnv.envTickTimerCounter++;
+    sTrace("syncEnvTick do ... envTickTimerLogicClockUser:%" PRIu64 ", envTickTimerLogicClock:%" PRIu64
+           ", envTickTimerCounter:%" PRIu64 ", envTickTimerMS:%d, tmrId:%p",
+           gSyncEnv.envTickTimerLogicClockUser, gSyncEnv.envTickTimerLogicClock, gSyncEnv.envTickTimerCounter,
+           gSyncEnv.envTickTimerMS, tmrId);
+
+    // do something, tick ...
+    taosTmrReset(syncEnvTick, gSyncEnv.envTickTimerMS, pSyncEnv, gSyncEnv.pTimerManager, &gSyncEnv.pEnvTickTimer);
+  } else {
+    sTrace("syncEnvTick pass ... envTickTimerLogicClockUser:%" PRIu64 ", envTickTimerLogicClock:%" PRIu64
+           ", envTickTimerCounter:%" PRIu64 ", envTickTimerMS:%d, tmrId:%p",
+           gSyncEnv.envTickTimerLogicClockUser, gSyncEnv.envTickTimerLogicClock, gSyncEnv.envTickTimerCounter,
+           gSyncEnv.envTickTimerMS, tmrId);
+  }
+}
diff --git a/source/libs/sync/src/syncMain.c b/source/libs/sync/src/syncMain.c
index 59f39a697d..139e4be1b9 100644
--- a/source/libs/sync/src/syncMain.c
+++ b/source/libs/sync/src/syncMain.c
@@ -33,11 +33,6 @@
 #include "syncTimeout.h"
 #include "syncUtil.h"
 #include "syncVoteMgr.h"
-#include "tref.h"
-
-bool gRaftDetailLog = false;
-
-static int32_t tsNodeRefId = -1;
 
 // ------ local funciton ---------
 // enqueue message ----
@@ -53,138 +48,36 @@ static bool    syncIsConfigChanged(const SSyncCfg* pOldCfg, const SSyncCfg* pNew
 int32_t syncNodeOnPing(SSyncNode* ths, SyncPing* pMsg);
 int32_t syncNodeOnPingReply(SSyncNode* ths, SyncPingReply* pMsg);
 
-// ---------------------------------
-static void syncNodeFreeCb(void* param) {
-  syncNodeClose(param);
-  param = NULL;
-}
-
-int32_t syncInit() {
-  int32_t ret = 0;
-
-  if (!syncEnvIsStart()) {
-    tsNodeRefId = taosOpenRef(200, syncNodeFreeCb);
-    if (tsNodeRefId < 0) {
-      sError("failed to init node ref");
-      syncCleanUp();
-      ret = -1;
-    } else {
-      sDebug("sync rsetId:%d is open", tsNodeRefId);
-      ret = syncEnvStart();
-    }
-  }
-
-  return ret;
-}
-
-void syncCleanUp() {
-  int32_t ret = syncEnvStop();
-  ASSERT(ret == 0);
-
-  if (tsNodeRefId != -1) {
-    sDebug("sync rsetId:%d is closed", tsNodeRefId);
-    taosCloseRef(tsNodeRefId);
-    tsNodeRefId = -1;
-  }
-}
-
 int64_t syncOpen(SSyncInfo* pSyncInfo) {
-  SSyncNode* pSyncNode = syncNodeOpen(pSyncInfo);
-  if (pSyncNode == NULL) {
+  SSyncNode* pNode = syncNodeOpen(pSyncInfo);
+  if (pNode == NULL) {
     sError("vgId:%d, failed to open sync node", pSyncInfo->vgId);
     return -1;
   }
 
-  pSyncNode->rid = taosAddRef(tsNodeRefId, pSyncNode);
-  if (pSyncNode->rid < 0) {
-    syncNodeClose(pSyncNode);
-    pSyncNode = NULL;
+  pNode->rid = syncNodeAdd(pNode);
+  if (pNode->rid < 0) {
+    syncNodeClose(pNode);
     return -1;
   }
 
-  sDebug("vgId:%d, sync rid:%" PRId64 " is added to rsetId:%d", pSyncInfo->vgId, pSyncNode->rid, tsNodeRefId);
-  return pSyncNode->rid;
+  return pNode->rid;
 }
 
 void syncStart(int64_t rid) {
-  SSyncNode* pSyncNode = taosAcquireRef(tsNodeRefId, rid);
-  if (pSyncNode == NULL) {
-    return;
+  SSyncNode* pNode = syncNodeAcquire(rid);
+  if (pNode != NULL) {
+    syncNodeStart(pNode);
+    syncNodeRelease(pNode);
   }
-
-  if (pSyncNode->pRaftCfg->isStandBy) {
-    syncNodeStartStandBy(pSyncNode);
-  } else {
-    syncNodeStart(pSyncNode);
-  }
-
-  taosReleaseRef(tsNodeRefId, pSyncNode->rid);
-}
-
-void syncStartNormal(int64_t rid) {
-  SSyncNode* pSyncNode = taosAcquireRef(tsNodeRefId, rid);
-  if (pSyncNode == NULL) {
-    return;
-  }
-  syncNodeStart(pSyncNode);
-
-  taosReleaseRef(tsNodeRefId, pSyncNode->rid);
-}
-
-void syncStartStandBy(int64_t rid) {
-  SSyncNode* pSyncNode = taosAcquireRef(tsNodeRefId, rid);
-  if (pSyncNode == NULL) {
-    return;
-  }
-  syncNodeStartStandBy(pSyncNode);
-
-  taosReleaseRef(tsNodeRefId, pSyncNode->rid);
 }
 
 void syncStop(int64_t rid) {
-  SSyncNode* pSyncNode = taosAcquireRef(tsNodeRefId, rid);
-  if (pSyncNode == NULL) return;
-  int32_t vgId = pSyncNode->vgId;
-  taosReleaseRef(tsNodeRefId, pSyncNode->rid);
-
-  taosRemoveRef(tsNodeRefId, rid);
-  sDebug("vgId:%d, sync rid:%" PRId64 " is removed from rsetId:%d", vgId, rid, tsNodeRefId);
-}
-
-int32_t syncSetStandby(int64_t rid) {
-  SSyncNode* pSyncNode = taosAcquireRef(tsNodeRefId, rid);
-  if (pSyncNode == NULL) {
-    terrno = TSDB_CODE_SYN_INTERNAL_ERROR;
-    sError("failed to set standby since accquire ref error, rid:%" PRId64, rid);
-    return -1;
+  SSyncNode* pNode = syncNodeAcquire(rid);
+  if (pNode != NULL) {
+    syncNodeRelease(pNode);
+    syncNodeRemove(rid);
   }
-
-  if (pSyncNode->state != TAOS_SYNC_STATE_FOLLOWER) {
-    if (pSyncNode->state == TAOS_SYNC_STATE_LEADER) {
-      terrno = TSDB_CODE_SYN_IS_LEADER;
-    } else {
-      terrno = TSDB_CODE_SYN_STANDBY_NOT_READY;
-    }
-    sError("failed to set standby since it is not follower, state:%s rid:%" PRId64, syncStr(pSyncNode->state), rid);
-    taosReleaseRef(tsNodeRefId, pSyncNode->rid);
-    return -1;
-  }
-
-  // state change
-  pSyncNode->state = TAOS_SYNC_STATE_FOLLOWER;
-  syncNodeStopHeartbeatTimer(pSyncNode);
-
-  // reset elect timer, long enough
-  int32_t electMS = TIMER_MAX_MS;
-  int32_t ret = syncNodeRestartElectTimer(pSyncNode, electMS);
-  ASSERT(ret == 0);
-
-  pSyncNode->pRaftCfg->isStandBy = 1;
-  raftCfgPersist(pSyncNode->pRaftCfg);
-
-  taosReleaseRef(tsNodeRefId, pSyncNode->rid);
-  sInfo("vgId:%d, set to standby", pSyncNode->vgId);
-  return 0;
 }
 
 bool syncNodeCheckNewConfig(SSyncNode* pSyncNode, const SSyncCfg* pNewCfg) {
@@ -205,7 +98,7 @@ bool syncNodeCheckNewConfig(SSyncNode* pSyncNode, const SSyncCfg* pNewCfg) {
 }
 
 int32_t syncReconfigBuild(int64_t rid, const SSyncCfg* pNewCfg, SRpcMsg* pRpcMsg) {
-  SSyncNode* pSyncNode = (SSyncNode*)taosAcquireRef(tsNodeRefId, rid);
+  SSyncNode* pSyncNode = syncNodeAcquire(rid);
   if (pSyncNode == NULL) {
     terrno = TSDB_CODE_SYN_INTERNAL_ERROR;
     return -1;
@@ -214,7 +107,7 @@ int32_t syncReconfigBuild(int64_t rid, const SSyncCfg* pNewCfg, SRpcMsg* pRpcMsg
   int32_t ret = 0;
 
   if (!syncNodeCheckNewConfig(pSyncNode, pNewCfg)) {
-    taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+    syncNodeRelease(pSyncNode);
     terrno = TSDB_CODE_SYN_NEW_CONFIG_ERROR;
     sError("invalid new config. vgId:%d", pSyncNode->vgId);
     return -1;
@@ -228,12 +121,12 @@ int32_t syncReconfigBuild(int64_t rid, const SSyncCfg* pNewCfg, SRpcMsg* pRpcMsg
   snprintf(pRpcMsg->pCont, pRpcMsg->contLen, "%s", newconfig);
   taosMemoryFree(newconfig);
 
-  taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+  syncNodeRelease(pSyncNode);
   return ret;
 }
 
 int32_t syncReconfig(int64_t rid, SSyncCfg* pNewCfg) {
-  SSyncNode* pSyncNode = (SSyncNode*)taosAcquireRef(tsNodeRefId, rid);
+  SSyncNode* pSyncNode = syncNodeAcquire(rid);
   if (pSyncNode == NULL) {
     terrno = TSDB_CODE_SYN_INTERNAL_ERROR;
     return -1;
@@ -241,7 +134,7 @@ int32_t syncReconfig(int64_t rid, SSyncCfg* pNewCfg) {
   ASSERT(rid == pSyncNode->rid);
 
   if (!syncNodeCheckNewConfig(pSyncNode, pNewCfg)) {
-    taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+    syncNodeRelease(pSyncNode);
     terrno = TSDB_CODE_SYN_NEW_CONFIG_ERROR;
     sError("invalid new config. vgId:%d", pSyncNode->vgId);
     return -1;
@@ -260,7 +153,7 @@ int32_t syncReconfig(int64_t rid, SSyncCfg* pNewCfg) {
   taosMemoryFree(newconfig);
   ret = syncNodePropose(pSyncNode, &rpcMsg, false);
 
-  taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+  syncNodeRelease(pSyncNode);
   return ret;
 #else
   syncNodeUpdateNewConfigIndex(pSyncNode, pNewCfg);
@@ -276,13 +169,13 @@ int32_t syncReconfig(int64_t rid, SSyncCfg* pNewCfg) {
 
     syncNodeReplicate(pSyncNode);
   }
-  taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+  syncNodeRelease(pSyncNode);
   return 0;
 #endif
 }
 
 int32_t syncLeaderTransfer(int64_t rid) {
-  SSyncNode* pSyncNode = (SSyncNode*)taosAcquireRef(tsNodeRefId, rid);
+  SSyncNode* pSyncNode = syncNodeAcquire(rid);
   if (pSyncNode == NULL) {
     terrno = TSDB_CODE_SYN_INTERNAL_ERROR;
     return -1;
@@ -290,12 +183,12 @@ int32_t syncLeaderTransfer(int64_t rid) {
   ASSERT(rid == pSyncNode->rid);
 
   int32_t ret = syncNodeLeaderTransfer(pSyncNode);
-  taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+  syncNodeRelease(pSyncNode);
   return ret;
 }
 
 int32_t syncLeaderTransferTo(int64_t rid, SNodeInfo newLeader) {
-  SSyncNode* pSyncNode = (SSyncNode*)taosAcquireRef(tsNodeRefId, rid);
+  SSyncNode* pSyncNode = syncNodeAcquire(rid);
   if (pSyncNode == NULL) {
     terrno = TSDB_CODE_SYN_INTERNAL_ERROR;
     return -1;
@@ -303,7 +196,7 @@ int32_t syncLeaderTransferTo(int64_t rid, SNodeInfo newLeader) {
   ASSERT(rid == pSyncNode->rid);
 
   int32_t ret = syncNodeLeaderTransferTo(pSyncNode, newLeader);
-  taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+  syncNodeRelease(pSyncNode);
   return ret;
 }
 
@@ -359,7 +252,7 @@ char* syncNodePeerState2Str(const SSyncNode* pSyncNode) {
 }
 
 int32_t syncBeginSnapshot(int64_t rid, int64_t lastApplyIndex) {
-  SSyncNode* pSyncNode = (SSyncNode*)taosAcquireRef(tsNodeRefId, rid);
+  SSyncNode* pSyncNode = syncNodeAcquire(rid);
   if (pSyncNode == NULL) {
     terrno = TSDB_CODE_SYN_INTERNAL_ERROR;
     return -1;
@@ -383,7 +276,7 @@ int32_t syncBeginSnapshot(int64_t rid, int64_t lastApplyIndex) {
                logNum, isEmpty);
       syncNodeEventLog(pSyncNode, logBuf);
 
-      taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+      syncNodeRelease(pSyncNode);
       return 0;
     }
 
@@ -412,7 +305,7 @@ int32_t syncBeginSnapshot(int64_t rid, int64_t lastApplyIndex) {
               syncNodeEventLog(pSyncNode, logBuf);
             } while (0);
 
-            taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+            syncNodeRelease(pSyncNode);
             return 0;
           }
         }
@@ -425,7 +318,7 @@ int32_t syncBeginSnapshot(int64_t rid, int64_t lastApplyIndex) {
                    lastApplyIndex, pSyncNode->minMatchIndex);
           syncNodeEventLog(pSyncNode, logBuf);
 
-          taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+          syncNodeRelease(pSyncNode);
           return 0;
         }
 
@@ -434,7 +327,7 @@ int32_t syncBeginSnapshot(int64_t rid, int64_t lastApplyIndex) {
         snprintf(logBuf, sizeof(logBuf), "new-snapshot-index:%" PRId64 " candidate, do not delete wal", lastApplyIndex);
         syncNodeEventLog(pSyncNode, logBuf);
 
-        taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+        syncNodeRelease(pSyncNode);
         return 0;
 
       } else {
@@ -443,7 +336,7 @@ int32_t syncBeginSnapshot(int64_t rid, int64_t lastApplyIndex) {
                  lastApplyIndex);
         syncNodeEventLog(pSyncNode, logBuf);
 
-        taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+        syncNodeRelease(pSyncNode);
         return 0;
       }
 
@@ -492,12 +385,12 @@ _DEL_WAL:
     }
   } while (0);
 
-  taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+  syncNodeRelease(pSyncNode);
   return code;
 }
 
 int32_t syncEndSnapshot(int64_t rid) {
-  SSyncNode* pSyncNode = (SSyncNode*)taosAcquireRef(tsNodeRefId, rid);
+  SSyncNode* pSyncNode = syncNodeAcquire(rid);
   if (pSyncNode == NULL) {
     terrno = TSDB_CODE_SYN_INTERNAL_ERROR;
     return -1;
@@ -509,9 +402,9 @@ int32_t syncEndSnapshot(int64_t rid) {
     SSyncLogStoreData* pData = pSyncNode->pLogStore->data;
     code = walEndSnapshot(pData->pWal);
     if (code != 0) {
-      sError("vgId:%d, wal snapshot end error since:%s", pSyncNode->vgId, terrstr(terrno));
+      sError("vgId:%d, wal snapshot end error since:%s", pSyncNode->vgId, terrstr());
 
-      taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+      syncNodeRelease(pSyncNode);
       return -1;
     } else {
       do {
@@ -525,12 +418,12 @@ int32_t syncEndSnapshot(int64_t rid) {
     }
   }
 
-  taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+  syncNodeRelease(pSyncNode);
   return code;
 }
 
 int32_t syncStepDown(int64_t rid, SyncTerm newTerm) {
-  SSyncNode* pSyncNode = (SSyncNode*)taosAcquireRef(tsNodeRefId, rid);
+  SSyncNode* pSyncNode = syncNodeAcquire(rid);
   if (pSyncNode == NULL) {
     terrno = TSDB_CODE_SYN_INTERNAL_ERROR;
     return -1;
@@ -539,7 +432,7 @@ int32_t syncStepDown(int64_t rid, SyncTerm newTerm) {
 
   syncNodeStepDown(pSyncNode, newTerm);
 
-  taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+  syncNodeRelease(pSyncNode);
   return 0;
 }
 
@@ -584,19 +477,19 @@ int32_t syncNodeLeaderTransferTo(SSyncNode* pSyncNode, SNodeInfo newLeader) {
 }
 
 bool syncCanLeaderTransfer(int64_t rid) {
-  SSyncNode* pSyncNode = (SSyncNode*)taosAcquireRef(tsNodeRefId, rid);
+  SSyncNode* pSyncNode = syncNodeAcquire(rid);
   if (pSyncNode == NULL) {
     return false;
   }
   ASSERT(rid == pSyncNode->rid);
 
   if (pSyncNode->replicaNum == 1) {
-    taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+    syncNodeRelease(pSyncNode);
     return false;
   }
 
   if (pSyncNode->state == TAOS_SYNC_STATE_FOLLOWER) {
-    taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+    syncNodeRelease(pSyncNode);
     return true;
   }
 
@@ -611,7 +504,7 @@ bool syncCanLeaderTransfer(int64_t rid) {
     }
   }
 
-  taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+  syncNodeRelease(pSyncNode);
   return matchOK;
 }
 
@@ -621,25 +514,25 @@ int32_t syncForwardToPeer(int64_t rid, SRpcMsg* pMsg, bool isWeak) {
 }
 
 ESyncState syncGetMyRole(int64_t rid) {
-  SSyncNode* pSyncNode = (SSyncNode*)taosAcquireRef(tsNodeRefId, rid);
+  SSyncNode* pSyncNode = syncNodeAcquire(rid);
   if (pSyncNode == NULL) {
     return TAOS_SYNC_STATE_ERROR;
   }
   ASSERT(rid == pSyncNode->rid);
   ESyncState state = pSyncNode->state;
 
-  taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+  syncNodeRelease(pSyncNode);
   return state;
 }
 
 bool syncIsReady(int64_t rid) {
-  SSyncNode* pSyncNode = (SSyncNode*)taosAcquireRef(tsNodeRefId, rid);
+  SSyncNode* pSyncNode = syncNodeAcquire(rid);
   if (pSyncNode == NULL) {
     return false;
   }
   ASSERT(rid == pSyncNode->rid);
   bool b = (pSyncNode->state == TAOS_SYNC_STATE_LEADER) && pSyncNode->restoreFinish;
-  taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+  syncNodeRelease(pSyncNode);
 
   // if false, set error code
   if (false == b) {
@@ -653,14 +546,14 @@ bool syncIsReady(int64_t rid) {
 }
 
 bool syncIsRestoreFinish(int64_t rid) {
-  SSyncNode* pSyncNode = (SSyncNode*)taosAcquireRef(tsNodeRefId, rid);
+  SSyncNode* pSyncNode = syncNodeAcquire(rid);
   if (pSyncNode == NULL) {
     return false;
   }
   ASSERT(rid == pSyncNode->rid);
   bool b = pSyncNode->restoreFinish;
 
-  taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+  syncNodeRelease(pSyncNode);
   return b;
 }
 
@@ -669,7 +562,7 @@ int32_t syncGetSnapshotByIndex(int64_t rid, SyncIndex index, SSnapshot* pSnapsho
     return -1;
   }
 
-  SSyncNode* pSyncNode = (SSyncNode*)taosAcquireRef(tsNodeRefId, rid);
+  SSyncNode* pSyncNode = syncNodeAcquire(rid);
   if (pSyncNode == NULL) {
     return -1;
   }
@@ -681,7 +574,7 @@ int32_t syncGetSnapshotByIndex(int64_t rid, SyncIndex index, SSnapshot* pSnapsho
     if (pEntry != NULL) {
       syncEntryDestory(pEntry);
     }
-    taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+    syncNodeRelease(pSyncNode);
     return -1;
   }
   ASSERT(pEntry != NULL);
@@ -692,12 +585,12 @@ int32_t syncGetSnapshotByIndex(int64_t rid, SyncIndex index, SSnapshot* pSnapsho
   pSnapshot->lastConfigIndex = syncNodeGetSnapshotConfigIndex(pSyncNode, index);
 
   syncEntryDestory(pEntry);
-  taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+  syncNodeRelease(pSyncNode);
   return 0;
 }
 
 int32_t syncGetSnapshotMeta(int64_t rid, struct SSnapshotMeta* sMeta) {
-  SSyncNode* pSyncNode = (SSyncNode*)taosAcquireRef(tsNodeRefId, rid);
+  SSyncNode* pSyncNode = syncNodeAcquire(rid);
   if (pSyncNode == NULL) {
     return -1;
   }
@@ -706,12 +599,12 @@ int32_t syncGetSnapshotMeta(int64_t rid, struct SSnapshotMeta* sMeta) {
 
   sTrace("vgId:%d, get snapshot meta, lastConfigIndex:%" PRId64, pSyncNode->vgId, pSyncNode->pRaftCfg->lastConfigIndex);
 
-  taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+  syncNodeRelease(pSyncNode);
   return 0;
 }
 
 int32_t syncGetSnapshotMetaByIndex(int64_t rid, SyncIndex snapshotIndex, struct SSnapshotMeta* sMeta) {
-  SSyncNode* pSyncNode = (SSyncNode*)taosAcquireRef(tsNodeRefId, rid);
+  SSyncNode* pSyncNode = syncNodeAcquire(rid);
   if (pSyncNode == NULL) {
     return -1;
   }
@@ -730,7 +623,7 @@ int32_t syncGetSnapshotMetaByIndex(int64_t rid, SyncIndex snapshotIndex, struct
   sTrace("vgId:%d, get snapshot meta by index:%" PRId64 " lcindex:%" PRId64, pSyncNode->vgId, snapshotIndex,
          sMeta->lastConfigIndex);
 
-  taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+  syncNodeRelease(pSyncNode);
   return 0;
 }
 
@@ -756,67 +649,67 @@ const char* syncGetMyRoleStr(int64_t rid) {
 }
 
 bool syncRestoreFinish(int64_t rid) {
-  SSyncNode* pSyncNode = (SSyncNode*)taosAcquireRef(tsNodeRefId, rid);
+  SSyncNode* pSyncNode = syncNodeAcquire(rid);
   if (pSyncNode == NULL) {
     return false;
   }
   ASSERT(rid == pSyncNode->rid);
   bool restoreFinish = pSyncNode->restoreFinish;
 
-  taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+  syncNodeRelease(pSyncNode);
   return restoreFinish;
 }
 
 SyncTerm syncGetMyTerm(int64_t rid) {
-  SSyncNode* pSyncNode = (SSyncNode*)taosAcquireRef(tsNodeRefId, rid);
+  SSyncNode* pSyncNode = syncNodeAcquire(rid);
   if (pSyncNode == NULL) {
     return TAOS_SYNC_STATE_ERROR;
   }
   ASSERT(rid == pSyncNode->rid);
   SyncTerm term = pSyncNode->pRaftStore->currentTerm;
 
-  taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+  syncNodeRelease(pSyncNode);
   return term;
 }
 
 SyncIndex syncGetLastIndex(int64_t rid) {
-  SSyncNode* pSyncNode = (SSyncNode*)taosAcquireRef(tsNodeRefId, rid);
+  SSyncNode* pSyncNode = syncNodeAcquire(rid);
   if (pSyncNode == NULL) {
     return SYNC_INDEX_INVALID;
   }
   ASSERT(rid == pSyncNode->rid);
   SyncIndex lastIndex = syncNodeGetLastIndex(pSyncNode);
 
-  taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+  syncNodeRelease(pSyncNode);
   return lastIndex;
 }
 
 SyncIndex syncGetCommitIndex(int64_t rid) {
-  SSyncNode* pSyncNode = (SSyncNode*)taosAcquireRef(tsNodeRefId, rid);
+  SSyncNode* pSyncNode = syncNodeAcquire(rid);
   if (pSyncNode == NULL) {
     return SYNC_INDEX_INVALID;
   }
   ASSERT(rid == pSyncNode->rid);
   SyncIndex cmtIndex = pSyncNode->commitIndex;
 
-  taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+  syncNodeRelease(pSyncNode);
   return cmtIndex;
 }
 
 SyncGroupId syncGetVgId(int64_t rid) {
-  SSyncNode* pSyncNode = (SSyncNode*)taosAcquireRef(tsNodeRefId, rid);
+  SSyncNode* pSyncNode = syncNodeAcquire(rid);
   if (pSyncNode == NULL) {
     return TAOS_SYNC_STATE_ERROR;
   }
   ASSERT(rid == pSyncNode->rid);
   SyncGroupId vgId = pSyncNode->vgId;
 
-  taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+  syncNodeRelease(pSyncNode);
   return vgId;
 }
 
 void syncGetEpSet(int64_t rid, SEpSet* pEpSet) {
-  SSyncNode* pSyncNode = (SSyncNode*)taosAcquireRef(tsNodeRefId, rid);
+  SSyncNode* pSyncNode = syncNodeAcquire(rid);
   if (pSyncNode == NULL) {
     memset(pEpSet, 0, sizeof(*pEpSet));
     return;
@@ -832,11 +725,11 @@ void syncGetEpSet(int64_t rid, SEpSet* pEpSet) {
   pEpSet->inUse = pSyncNode->pRaftCfg->cfg.myIndex;
   sInfo("vgId:%d, sync get epset in-use:%d", pSyncNode->vgId, pEpSet->inUse);
 
-  taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+  syncNodeRelease(pSyncNode);
 }
 
 void syncGetRetryEpSet(int64_t rid, SEpSet* pEpSet) {
-  SSyncNode* pSyncNode = (SSyncNode*)taosAcquireRef(tsNodeRefId, rid);
+  SSyncNode* pSyncNode = syncNodeAcquire(rid);
   if (pSyncNode == NULL) {
     memset(pEpSet, 0, sizeof(*pEpSet));
     return;
@@ -855,11 +748,11 @@ void syncGetRetryEpSet(int64_t rid, SEpSet* pEpSet) {
   }
   sInfo("vgId:%d, sync get retry epset in-use:%d", pSyncNode->vgId, pEpSet->inUse);
 
-  taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+  syncNodeRelease(pSyncNode);
 }
 
 int32_t syncGetRespRpc(int64_t rid, uint64_t index, SRpcMsg* msg) {
-  SSyncNode* pSyncNode = (SSyncNode*)taosAcquireRef(tsNodeRefId, rid);
+  SSyncNode* pSyncNode = syncNodeAcquire(rid);
   if (pSyncNode == NULL) {
     return TAOS_SYNC_STATE_ERROR;
   }
@@ -871,12 +764,12 @@ int32_t syncGetRespRpc(int64_t rid, uint64_t index, SRpcMsg* msg) {
     memcpy(msg, &(stub.rpcMsg), sizeof(SRpcMsg));
   }
 
-  taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+  syncNodeRelease(pSyncNode);
   return ret;
 }
 
 int32_t syncGetAndDelRespRpc(int64_t rid, uint64_t index, SRpcHandleInfo* pInfo) {
-  SSyncNode* pSyncNode = (SSyncNode*)taosAcquireRef(tsNodeRefId, rid);
+  SSyncNode* pSyncNode = syncNodeAcquire(rid);
   if (pSyncNode == NULL) {
     return TAOS_SYNC_STATE_ERROR;
   }
@@ -889,12 +782,12 @@ int32_t syncGetAndDelRespRpc(int64_t rid, uint64_t index, SRpcHandleInfo* pInfo)
   }
 
   sTrace("vgId:%d, get seq:%" PRIu64 " rpc handle:%p", pSyncNode->vgId, index, pInfo->handle);
-  taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+  syncNodeRelease(pSyncNode);
   return ret;
 }
 
 void syncSetMsgCb(int64_t rid, const SMsgCb* msgcb) {
-  SSyncNode* pSyncNode = (SSyncNode*)taosAcquireRef(tsNodeRefId, rid);
+  SSyncNode* pSyncNode = syncNodeAcquire(rid);
   if (pSyncNode == NULL) {
     sTrace("syncSetQ get pSyncNode is NULL, rid:%" PRId64, rid);
     return;
@@ -902,24 +795,24 @@ void syncSetMsgCb(int64_t rid, const SMsgCb* msgcb) {
   ASSERT(rid == pSyncNode->rid);
   pSyncNode->msgcb = msgcb;
 
-  taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+  syncNodeRelease(pSyncNode);
 }
 
 char* sync2SimpleStr(int64_t rid) {
-  SSyncNode* pSyncNode = (SSyncNode*)taosAcquireRef(tsNodeRefId, rid);
+  SSyncNode* pSyncNode = syncNodeAcquire(rid);
   if (pSyncNode == NULL) {
     sTrace("syncSetRpc get pSyncNode is NULL, rid:%" PRId64, rid);
     return NULL;
   }
   ASSERT(rid == pSyncNode->rid);
   char* s = syncNode2SimpleStr(pSyncNode);
-  taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+  syncNodeRelease(pSyncNode);
 
   return s;
 }
 
 void setPingTimerMS(int64_t rid, int32_t pingTimerMS) {
-  SSyncNode* pSyncNode = (SSyncNode*)taosAcquireRef(tsNodeRefId, rid);
+  SSyncNode* pSyncNode = syncNodeAcquire(rid);
   if (pSyncNode == NULL) {
     return;
   }
@@ -927,22 +820,22 @@ void setPingTimerMS(int64_t rid, int32_t pingTimerMS) {
   pSyncNode->pingBaseLine = pingTimerMS;
   pSyncNode->pingTimerMS = pingTimerMS;
 
-  taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+  syncNodeRelease(pSyncNode);
 }
 
 void setElectTimerMS(int64_t rid, int32_t electTimerMS) {
-  SSyncNode* pSyncNode = (SSyncNode*)taosAcquireRef(tsNodeRefId, rid);
+  SSyncNode* pSyncNode = syncNodeAcquire(rid);
   if (pSyncNode == NULL) {
     return;
   }
   ASSERT(rid == pSyncNode->rid);
   pSyncNode->electBaseLine = electTimerMS;
 
-  taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+  syncNodeRelease(pSyncNode);
 }
 
 void setHeartbeatTimerMS(int64_t rid, int32_t hbTimerMS) {
-  SSyncNode* pSyncNode = (SSyncNode*)taosAcquireRef(tsNodeRefId, rid);
+  SSyncNode* pSyncNode = syncNodeAcquire(rid);
   if (pSyncNode == NULL) {
     return;
   }
@@ -950,20 +843,20 @@ void setHeartbeatTimerMS(int64_t rid, int32_t hbTimerMS) {
   pSyncNode->hbBaseLine = hbTimerMS;
   pSyncNode->heartbeatTimerMS = hbTimerMS;
 
-  taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+  syncNodeRelease(pSyncNode);
 }
 
 int32_t syncPropose(int64_t rid, SRpcMsg* pMsg, bool isWeak) {
-  SSyncNode* pSyncNode = taosAcquireRef(tsNodeRefId, rid);
+  SSyncNode* pSyncNode = syncNodeAcquire(rid);
   if (pSyncNode == NULL) {
-    taosReleaseRef(tsNodeRefId, rid);
+    syncNodeRelease(pSyncNode);
     terrno = TSDB_CODE_SYN_INTERNAL_ERROR;
     return -1;
   }
   ASSERT(rid == pSyncNode->rid);
 
   int32_t ret = syncNodePropose(pSyncNode, pMsg, isWeak);
-  taosReleaseRef(tsNodeRefId, pSyncNode->rid);
+  syncNodeRelease(pSyncNode);
   return ret;
 }
 
@@ -1085,7 +978,7 @@ int32_t syncHbTimerInit(SSyncNode* pSyncNode, SSyncTimer* pSyncTimer, SRaftId de
 
 int32_t syncHbTimerStart(SSyncNode* pSyncNode, SSyncTimer* pSyncTimer) {
   int32_t ret = 0;
-  if (syncEnvIsStart()) {
+  if (syncIsInit()) {
     SSyncHbTimerData* pData = taosMemoryMalloc(sizeof(SSyncHbTimerData));
     pData->pSyncNode = pSyncNode;
     pData->pTimer = pSyncTimer;
@@ -1093,7 +986,7 @@ int32_t syncHbTimerStart(SSyncNode* pSyncNode, SSyncTimer* pSyncTimer) {
     pData->logicClock = pSyncTimer->logicClock;
 
     pSyncTimer->pData = pData;
-    taosTmrReset(pSyncTimer->timerCb, pSyncTimer->timerMS, pData, gSyncEnv->pTimerManager, &pSyncTimer->pTimer);
+    taosTmrReset(pSyncTimer->timerCb, pSyncTimer->timerMS, pData, syncEnv()->pTimerManager, &pSyncTimer->pTimer);
   } else {
     sError("vgId:%d, start ctrl hb timer error, sync env is stop", pSyncNode->vgId);
   }
@@ -1558,8 +1451,8 @@ int32_t syncNodePingAll(SSyncNode* pSyncNode) {
 // timer control --------------
 int32_t syncNodeStartPingTimer(SSyncNode* pSyncNode) {
   int32_t ret = 0;
-  if (syncEnvIsStart()) {
-    taosTmrReset(pSyncNode->FpPingTimerCB, pSyncNode->pingTimerMS, pSyncNode, gSyncEnv->pTimerManager,
+  if (syncIsInit()) {
+    taosTmrReset(pSyncNode->FpPingTimerCB, pSyncNode->pingTimerMS, pSyncNode, syncEnv()->pTimerManager,
                  &pSyncNode->pPingTimer);
     atomic_store_64(&pSyncNode->pingTimerLogicClock, pSyncNode->pingTimerLogicClockUser);
   } else {
@@ -1578,7 +1471,7 @@ int32_t syncNodeStopPingTimer(SSyncNode* pSyncNode) {
 
 int32_t syncNodeStartElectTimer(SSyncNode* pSyncNode, int32_t ms) {
   int32_t ret = 0;
-  if (syncEnvIsStart()) {
+  if (syncIsInit()) {
     pSyncNode->electTimerMS = ms;
 
     SElectTimer* pElectTimer = taosMemoryMalloc(sizeof(SElectTimer));
@@ -1586,7 +1479,7 @@ int32_t syncNodeStartElectTimer(SSyncNode* pSyncNode, int32_t ms) {
     pElectTimer->pSyncNode = pSyncNode;
     pElectTimer->pData = NULL;
 
-    taosTmrReset(pSyncNode->FpElectTimerCB, pSyncNode->electTimerMS, pElectTimer, gSyncEnv->pTimerManager,
+    taosTmrReset(pSyncNode->FpElectTimerCB, pSyncNode->electTimerMS, pElectTimer, syncEnv()->pTimerManager,
                  &pSyncNode->pElectTimer);
 
   } else {
@@ -1634,8 +1527,8 @@ int32_t syncNodeResetElectTimer(SSyncNode* pSyncNode) {
 
 static int32_t syncNodeDoStartHeartbeatTimer(SSyncNode* pSyncNode) {
   int32_t ret = 0;
-  if (syncEnvIsStart()) {
-    taosTmrReset(pSyncNode->FpHeartbeatTimerCB, pSyncNode->heartbeatTimerMS, pSyncNode, gSyncEnv->pTimerManager,
+  if (syncIsInit()) {
+    taosTmrReset(pSyncNode->FpHeartbeatTimerCB, pSyncNode->heartbeatTimerMS, pSyncNode, syncEnv()->pTimerManager,
                  &pSyncNode->pHeartbeatTimer);
     atomic_store_64(&pSyncNode->heartbeatTimerLogicClock, pSyncNode->heartbeatTimerLogicClockUser);
   } else {
@@ -2326,17 +2219,6 @@ _END:
   return;
 }
 
-SSyncNode* syncNodeAcquire(int64_t rid) {
-  SSyncNode* pNode = taosAcquireRef(tsNodeRefId, rid);
-  if (pNode == NULL) {
-    sTrace("failed to acquire node from refId:%" PRId64, rid);
-  }
-
-  return pNode;
-}
-
-void syncNodeRelease(SSyncNode* pNode) { taosReleaseRef(tsNodeRefId, pNode->rid); }
-
 // raft state change --------------
 void syncNodeUpdateTerm(SSyncNode* pSyncNode, SyncTerm term) {
   if (term > pSyncNode->pRaftStore->currentTerm) {
@@ -2787,8 +2669,8 @@ static void syncNodeEqPingTimer(void* param, void* tmrId) {
     }
     syncTimeoutDestroy(pSyncMsg);
 
-    if (syncEnvIsStart()) {
-      taosTmrReset(syncNodeEqPingTimer, pSyncNode->pingTimerMS, pSyncNode, gSyncEnv->pTimerManager,
+    if (syncIsInit()) {
+      taosTmrReset(syncNodeEqPingTimer, pSyncNode->pingTimerMS, pSyncNode, syncEnv()->pTimerManager,
                    &pSyncNode->pPingTimer);
     } else {
       sError("sync env is stop, syncNodeEqPingTimer");
@@ -2808,7 +2690,7 @@ static void syncNodeEqElectTimer(void* param, void* tmrId) {
                                             pSyncNode->vgId, pSyncNode);
   SRpcMsg      rpcMsg;
   syncTimeout2RpcMsg(pSyncMsg, &rpcMsg);
-  if (pSyncNode->FpEqMsg != NULL) {
+  if (pSyncNode->FpEqMsg != NULL && pSyncNode->msgcb != NULL && pSyncNode->msgcb->putToQueueFp != NULL) {
     int32_t code = pSyncNode->FpEqMsg(pSyncNode->msgcb, &rpcMsg);
     if (code != 0) {
       sError("vgId:%d, sync enqueue elect msg error, code:%d", pSyncNode->vgId, code);
@@ -2833,9 +2715,9 @@ static void syncNodeEqElectTimer(void* param, void* tmrId) {
 
 #if 0
   // reset timer ms
-  if (syncEnvIsStart() && pSyncNode->electBaseLine > 0) {
+  if (syncIsInit() && pSyncNode->electBaseLine > 0) {
     pSyncNode->electTimerMS = syncUtilElectRandomMS(pSyncNode->electBaseLine, 2 * pSyncNode->electBaseLine);
-    taosTmrReset(syncNodeEqElectTimer, pSyncNode->electTimerMS, pSyncNode, gSyncEnv->pTimerManager,
+    taosTmrReset(syncNodeEqElectTimer, pSyncNode->electTimerMS, pSyncNode, syncEnv()->pTimerManager,
                  &pSyncNode->pElectTimer);
   } else {
     sError("sync env is stop, syncNodeEqElectTimer");
@@ -2870,8 +2752,8 @@ static void syncNodeEqHeartbeatTimer(void* param, void* tmrId) {
       }
       syncTimeoutDestroy(pSyncMsg);
 
-      if (syncEnvIsStart()) {
-        taosTmrReset(syncNodeEqHeartbeatTimer, pSyncNode->heartbeatTimerMS, pSyncNode, gSyncEnv->pTimerManager,
+      if (syncIsInit()) {
+        taosTmrReset(syncNodeEqHeartbeatTimer, pSyncNode->heartbeatTimerMS, pSyncNode, syncEnv()->pTimerManager,
                      &pSyncNode->pHeartbeatTimer);
       } else {
         sError("sync env is stop, syncNodeEqHeartbeatTimer");
@@ -2931,8 +2813,8 @@ static void syncNodeEqPeerHeartbeatTimer(void* param, void* tmrId) {
 
       syncHeartbeatDestroy(pSyncMsg);
 
-      if (syncEnvIsStart()) {
-        taosTmrReset(syncNodeEqPeerHeartbeatTimer, pSyncTimer->timerMS, pData, gSyncEnv->pTimerManager,
+      if (syncIsInit()) {
+        taosTmrReset(syncNodeEqPeerHeartbeatTimer, pSyncTimer->timerMS, pData, syncEnv()->pTimerManager,
                      &pSyncTimer->pTimer);
       } else {
         sError("sync env is stop, syncNodeEqHeartbeatTimer");
@@ -3424,6 +3306,7 @@ int32_t syncNodeDoCommit(SSyncNode* ths, SyncIndex beginIndex, SyncIndex endInde
           // ASSERT(pEntry != NULL);
           if (code != 0 || pEntry == NULL) {
             syncNodeErrorLog(ths, "get log entry error");
+            sFatal("vgId:%d, get log entry %" PRId64 " error when commit since %s", ths->vgId, i, terrstr());
             continue;
           }
         }
diff --git a/source/libs/sync/src/syncTimeout.c b/source/libs/sync/src/syncTimeout.c
index 5ff73a6406..1c08217099 100644
--- a/source/libs/sync/src/syncTimeout.c
+++ b/source/libs/sync/src/syncTimeout.c
@@ -76,7 +76,7 @@ int32_t syncNodeTimerRoutine(SSyncNode* ths) {
     SSyncLogStoreData* pData = ths->pLogStore->data;
     int32_t            code = walEndSnapshot(pData->pWal);
     if (code != 0) {
-      sError("vgId:%d, wal snapshot end error since:%s", ths->vgId, terrstr(terrno));
+      sError("vgId:%d, timer wal snapshot end error since:%s", ths->vgId, terrstr());
       return -1;
     } else {
       do {
diff --git a/source/libs/sync/test/syncElectTest.cpp b/source/libs/sync/test/syncElectTest.cpp
index 862f7bd0ba..d09879a699 100644
--- a/source/libs/sync/test/syncElectTest.cpp
+++ b/source/libs/sync/test/syncElectTest.cpp
@@ -98,7 +98,7 @@ int main(int argc, char** argv) {
   init();
   int32_t ret = syncIOStart((char*)"127.0.0.1", gPorts[myIndex]);
   assert(ret == 0);
-  ret = syncEnvStart();
+  ret = syncInit();
   assert(ret == 0);
 
   char walPath[128];
diff --git a/source/libs/sync/test/syncEncodeTest.cpp b/source/libs/sync/test/syncEncodeTest.cpp
index 9f1a81e7ed..fdb5cf7ac8 100644
--- a/source/libs/sync/test/syncEncodeTest.cpp
+++ b/source/libs/sync/test/syncEncodeTest.cpp
@@ -152,7 +152,7 @@ int main(int argc, char **argv) {
   int32_t ret = syncIOStart((char *)"127.0.0.1", ports[myIndex]);
   assert(ret == 0);
 
-  ret = syncEnvStart();
+  ret = syncInit();
   assert(ret == 0);
 
   taosRemoveDir("./wal_test");
diff --git a/source/libs/sync/test/syncEnqTest.cpp b/source/libs/sync/test/syncEnqTest.cpp
index 8461bfe9b7..191e245b1e 100644
--- a/source/libs/sync/test/syncEnqTest.cpp
+++ b/source/libs/sync/test/syncEnqTest.cpp
@@ -81,7 +81,7 @@ int main(int argc, char** argv) {
   int32_t ret = syncIOStart((char*)"127.0.0.1", ports[myIndex]);
   assert(ret == 0);
 
-  ret = syncEnvStart();
+  ret = syncInit();
   assert(ret == 0);
 
   SSyncNode* pSyncNode = syncInitTest();
diff --git a/source/libs/sync/test/syncEnvTest.cpp b/source/libs/sync/test/syncEnvTest.cpp
index a7a819e046..404ab32d58 100644
--- a/source/libs/sync/test/syncEnvTest.cpp
+++ b/source/libs/sync/test/syncEnvTest.cpp
@@ -22,7 +22,7 @@ int main() {
 
   logTest();
 
-  ret = syncEnvStart();
+  ret = syncInit();
   assert(ret == 0);
 
   for (int i = 0; i < 5; ++i) {
@@ -37,8 +37,6 @@ int main() {
     taosMsleep(5000);
   }
 
-  ret = syncEnvStop();
-  assert(ret == 0);
-
+  syncCleanUp();
   return 0;
 }
diff --git a/source/libs/sync/test/syncIOSendMsgTest.cpp b/source/libs/sync/test/syncIOSendMsgTest.cpp
index 630d96054b..4a457136c2 100644
--- a/source/libs/sync/test/syncIOSendMsgTest.cpp
+++ b/source/libs/sync/test/syncIOSendMsgTest.cpp
@@ -82,7 +82,7 @@ int main(int argc, char** argv) {
   int32_t ret = syncIOStart((char*)"127.0.0.1", ports[myIndex]);
   assert(ret == 0);
 
-  ret = syncEnvStart();
+  ret = syncInit();
   assert(ret == 0);
 
   SSyncNode* pSyncNode = syncInitTest();
diff --git a/source/libs/sync/test/syncInitTest.cpp b/source/libs/sync/test/syncInitTest.cpp
index d0843151f4..d654ad06fe 100644
--- a/source/libs/sync/test/syncInitTest.cpp
+++ b/source/libs/sync/test/syncInitTest.cpp
@@ -81,7 +81,7 @@ int main(int argc, char** argv) {
   int32_t ret = syncIOStart((char*)"127.0.0.1", ports[myIndex]);
   assert(ret == 0);
 
-  ret = syncEnvStart();
+  ret = syncInit();
   assert(ret == 0);
 
   SSyncNode* pSyncNode = syncInitTest();
@@ -91,7 +91,7 @@ int main(int argc, char** argv) {
   initRaftId(pSyncNode);
 
   syncNodeClose(pSyncNode);
-  syncEnvStop();
+  syncCleanUp();
   // syncIOStop();
 
   // taosCloseLog();
diff --git a/source/libs/sync/test/syncPingSelfTest.cpp b/source/libs/sync/test/syncPingSelfTest.cpp
index 99287bf7b0..f44cbb04d5 100644
--- a/source/libs/sync/test/syncPingSelfTest.cpp
+++ b/source/libs/sync/test/syncPingSelfTest.cpp
@@ -81,7 +81,7 @@ int main(int argc, char** argv) {
   int32_t ret = syncIOStart((char*)"127.0.0.1", ports[myIndex]);
   assert(ret == 0);
 
-  ret = syncEnvStart();
+  ret = syncInit();
   assert(ret == 0);
 
   SSyncNode* pSyncNode = syncInitTest();
diff --git a/source/libs/sync/test/syncPingTimerTest.cpp b/source/libs/sync/test/syncPingTimerTest.cpp
index cd9440e3e2..fd6342aa84 100644
--- a/source/libs/sync/test/syncPingTimerTest.cpp
+++ b/source/libs/sync/test/syncPingTimerTest.cpp
@@ -81,7 +81,7 @@ int main(int argc, char** argv) {
   int32_t ret = syncIOStart((char*)"127.0.0.1", ports[myIndex]);
   assert(ret == 0);
 
-  ret = syncEnvStart();
+  ret = syncInit();
   assert(ret == 0);
 
   SSyncNode* pSyncNode = syncInitTest();
diff --git a/source/libs/sync/test/syncPingTimerTest2.cpp b/source/libs/sync/test/syncPingTimerTest2.cpp
index fa09d04368..295003dff3 100644
--- a/source/libs/sync/test/syncPingTimerTest2.cpp
+++ b/source/libs/sync/test/syncPingTimerTest2.cpp
@@ -81,7 +81,7 @@ int main(int argc, char** argv) {
   int32_t ret = syncIOStart((char*)"127.0.0.1", ports[myIndex]);
   assert(ret == 0);
 
-  ret = syncEnvStart();
+  ret = syncInit();
   assert(ret == 0);
 
   SSyncNode* pSyncNode = syncInitTest();
diff --git a/source/libs/sync/test/syncSnapshotTest.cpp b/source/libs/sync/test/syncSnapshotTest.cpp
index 3dc8518072..50771ac476 100644
--- a/source/libs/sync/test/syncSnapshotTest.cpp
+++ b/source/libs/sync/test/syncSnapshotTest.cpp
@@ -179,7 +179,7 @@ int main(int argc, char **argv) {
   int32_t ret = syncIOStart((char *)"127.0.0.1", ports[myIndex]);
   assert(ret == 0);
 
-  ret = syncEnvStart();
+  ret = syncInit();
   assert(ret == 0);
 
   // taosRemoveDir(pWalDir);
diff --git a/source/libs/sync/test/syncVotesGrantedTest.cpp b/source/libs/sync/test/syncVotesGrantedTest.cpp
index d4885d0316..e2e8748697 100644
--- a/source/libs/sync/test/syncVotesGrantedTest.cpp
+++ b/source/libs/sync/test/syncVotesGrantedTest.cpp
@@ -82,7 +82,7 @@ int main(int argc, char** argv) {
   int32_t ret = syncIOStart((char*)"127.0.0.1", ports[myIndex]);
   assert(ret == 0);
 
-  ret = syncEnvStart();
+  ret = syncInit();
   assert(ret == 0);
 
   SSyncNode* pSyncNode = syncInitTest();
diff --git a/source/libs/sync/test/syncVotesRespondTest.cpp b/source/libs/sync/test/syncVotesRespondTest.cpp
index 77262dfc65..881a5331b1 100644
--- a/source/libs/sync/test/syncVotesRespondTest.cpp
+++ b/source/libs/sync/test/syncVotesRespondTest.cpp
@@ -82,7 +82,7 @@ int main(int argc, char** argv) {
   int32_t ret = syncIOStart((char*)"127.0.0.1", ports[myIndex]);
   assert(ret == 0);
 
-  ret = syncEnvStart();
+  ret = syncInit();
   assert(ret == 0);
 
   SSyncNode* pSyncNode = syncInitTest();
diff --git a/source/libs/sync/test/syncWriteTest.cpp b/source/libs/sync/test/syncWriteTest.cpp
index b185f52f75..fee98ddd52 100644
--- a/source/libs/sync/test/syncWriteTest.cpp
+++ b/source/libs/sync/test/syncWriteTest.cpp
@@ -154,7 +154,7 @@ int main(int argc, char **argv) {
   int32_t ret = syncIOStart((char *)"127.0.0.1", ports[myIndex]);
   assert(ret == 0);
 
-  ret = syncEnvStart();
+  ret = syncInit();
   assert(ret == 0);
 
   taosRemoveDir("./wal_test");
diff --git a/source/libs/transport/inc/transComm.h b/source/libs/transport/inc/transComm.h
index b83f84e3f2..2354f0f959 100644
--- a/source/libs/transport/inc/transComm.h
+++ b/source/libs/transport/inc/transComm.h
@@ -428,6 +428,7 @@ void    transDestoryExHandle(void* handle);
 int32_t transGetRefMgt();
 int32_t transGetInstMgt();
 
+void transHttpEnvDestroy();
 #ifdef __cplusplus
 }
 #endif
diff --git a/source/libs/transport/src/thttp.c b/source/libs/transport/src/thttp.c
index 92989a45f5..00854b5ee5 100644
--- a/source/libs/transport/src/thttp.c
+++ b/source/libs/transport/src/thttp.c
@@ -20,21 +20,52 @@
 #include "thttp.h"
 #include "taoserror.h"
 #include "tlog.h"
+#include "transComm.h"
 
 // clang-format on
 
 #define HTTP_RECV_BUF_SIZE 1024
 
+typedef struct SHttpModule {
+  uv_loop_t*  loop;
+  SAsyncPool* asyncPool;
+  TdThread    thread;
+} SHttpModule;
+
+typedef struct SHttpMsg {
+  queue         q;
+  char*         server;
+  int32_t       port;
+  char*         cont;
+  int32_t       len;
+  EHttpCompFlag flag;
+  int8_t        quit;
+  SHttpModule*  http;
+
+} SHttpMsg;
+
 typedef struct SHttpClient {
-  uv_connect_t conn;
-  uv_tcp_t     tcp;
-  uv_write_t   req;
-  uv_buf_t*    wbuf;
-  char*        rbuf;
-  char*        addr;
-  uint16_t     port;
+  uv_connect_t       conn;
+  uv_tcp_t           tcp;
+  uv_write_t         req;
+  uv_buf_t*          wbuf;
+  char*              rbuf;
+  char*              addr;
+  uint16_t           port;
+  struct sockaddr_in dest;
 } SHttpClient;
 
+static TdThreadOnce transHttpInit = PTHREAD_ONCE_INIT;
+static SHttpModule* thttp = NULL;
+static void         transHttpEnvInit();
+
+static void    httpHandleReq(SHttpMsg* msg);
+static void    httpHandleQuit(SHttpMsg* msg);
+static int32_t httpSendQuit();
+
+static int32_t taosSendHttpReportImpl(const char* server, uint16_t port, char* pCont, int32_t contLen,
+                                      EHttpCompFlag flag);
+
 static int32_t taosBuildHttpHeader(const char* server, int32_t contLen, char* pHead, int32_t headLen,
                                    EHttpCompFlag flag) {
   if (flag == HTTP_FLAT) {
@@ -53,6 +84,7 @@ static int32_t taosBuildHttpHeader(const char* server, int32_t contLen, char* pH
                     "Content-Length: %d\n\n",
                     server, contLen);
   } else {
+    terrno = TSDB_CODE_INVALID_CFG;
     return -1;
   }
 }
@@ -126,88 +158,10 @@ _OVER:
   return code;
 }
 
-static FORCE_INLINE void destroyHttpClient(SHttpClient* cli) {
-  taosMemoryFree(cli->wbuf);
-  taosMemoryFree(cli->rbuf);
-  taosMemoryFree(cli->addr);
-  taosMemoryFree(cli);
-}
-static FORCE_INLINE void clientCloseCb(uv_handle_t* handle) {
-  SHttpClient* cli = handle->data;
-  destroyHttpClient(cli);
-}
-static FORCE_INLINE void clientAllocBuffCb(uv_handle_t* handle, size_t suggested_size, uv_buf_t* buf) {
-  SHttpClient* cli = handle->data;
-  buf->base = cli->rbuf;
-  buf->len = HTTP_RECV_BUF_SIZE;
-}
-static FORCE_INLINE void clientRecvCb(uv_stream_t* handle, ssize_t nread, const uv_buf_t* buf) {
-  SHttpClient* cli = handle->data;
-  if (nread < 0) {
-    uError("http-report recv error:%s", uv_err_name(nread));
-  } else {
-    uTrace("http-report succ to recv %d bytes", (int32_t)nread);
-  }
-  if (!uv_is_closing((uv_handle_t*)&cli->tcp)) {
-    uv_close((uv_handle_t*)&cli->tcp, clientCloseCb);
-  } else {
-    destroyHttpClient(cli);
-  }
-}
-static void clientSentCb(uv_write_t* req, int32_t status) {
-  SHttpClient* cli = req->data;
-  if (status != 0) {
-    terrno = TAOS_SYSTEM_ERROR(status);
-    uError("http-report failed to send data %s", uv_strerror(status));
-    if (!uv_is_closing((uv_handle_t*)&cli->tcp)) {
-      uv_close((uv_handle_t*)&cli->tcp, clientCloseCb);
-    } else {
-      destroyHttpClient(cli);
-    }
-    return;
-  } else {
-    uTrace("http-report succ to send data");
-  }
-  status = uv_read_start((uv_stream_t*)&cli->tcp, clientAllocBuffCb, clientRecvCb);
-  if (status != 0) {
-    terrno = TAOS_SYSTEM_ERROR(status);
-    uError("http-report failed to recv data,reason:%s, dst:%s:%d", uv_strerror(status), cli->addr, cli->port);
-    if (!uv_is_closing((uv_handle_t*)&cli->tcp)) {
-      uv_close((uv_handle_t*)&cli->tcp, clientCloseCb);
-    } else {
-      destroyHttpClient(cli);
-    }
-  }
-}
-static void clientConnCb(uv_connect_t* req, int32_t status) {
-  SHttpClient* cli = req->data;
-  if (status != 0) {
-    terrno = TAOS_SYSTEM_ERROR(status);
-    uError("http-report failed to conn to server, reason:%s, dst:%s:%d", uv_strerror(status), cli->addr, cli->port);
-    if (!uv_is_closing((uv_handle_t*)&cli->tcp)) {
-      uv_close((uv_handle_t*)&cli->tcp, clientCloseCb);
-    } else {
-      destroyHttpClient(cli);
-    }
-    return;
-  }
-  status = uv_write(&cli->req, (uv_stream_t*)&cli->tcp, cli->wbuf, 2, clientSentCb);
-  if (0 != status) {
-    terrno = TAOS_SYSTEM_ERROR(status);
-    uError("http-report failed to send data,reason:%s, dst:%s:%d", uv_strerror(status), cli->addr, cli->port);
-    if (!uv_is_closing((uv_handle_t*)&cli->tcp)) {
-      uv_close((uv_handle_t*)&cli->tcp, clientCloseCb);
-    } else {
-      destroyHttpClient(cli);
-    }
-  }
-}
-
 static FORCE_INLINE int32_t taosBuildDstAddr(const char* server, uint16_t port, struct sockaddr_in* dest) {
   uint32_t ip = taosGetIpv4FromFqdn(server);
   if (ip == 0xffffffff) {
-    terrno = TAOS_SYSTEM_ERROR(errno);
-    uError("http-report failed to get http server:%s since %s", server, errno == 0 ? "invalid http server" : terrstr());
+    tError("http-report failed to get http server:%s since %s", server, errno == 0 ? "invalid http server" : terrstr());
     return -1;
   }
   char buf[128] = {0};
@@ -215,27 +169,206 @@ static FORCE_INLINE int32_t taosBuildDstAddr(const char* server, uint16_t port,
   uv_ip4_addr(buf, port, dest);
   return 0;
 }
-int32_t taosSendHttpReport(const char* server, uint16_t port, char* pCont, int32_t contLen, EHttpCompFlag flag) {
-  struct sockaddr_in dest = {0};
-  if (taosBuildDstAddr(server, port, &dest) < 0) {
-    return -1;
-  }
-  if (flag == HTTP_GZIP) {
-    int32_t dstLen = taosCompressHttpRport(pCont, contLen);
-    if (dstLen > 0) {
-      contLen = dstLen;
+
+static void* httpThread(void* arg) {
+  SHttpModule* http = (SHttpModule*)arg;
+  setThreadName("http-cli-send-thread");
+  uv_run(http->loop, UV_RUN_DEFAULT);
+  return NULL;
+}
+
+static void httpDestroyMsg(SHttpMsg* msg) {
+  if (msg == NULL) return;
+
+  taosMemoryFree(msg->server);
+  taosMemoryFree(msg->cont);
+  taosMemoryFree(msg);
+}
+static void httpAsyncCb(uv_async_t* handle) {
+  SAsyncItem*  item = handle->data;
+  SHttpModule* http = item->pThrd;
+
+  SHttpMsg *msg = NULL, *quitMsg = NULL;
+
+  queue wq;
+  taosThreadMutexLock(&item->mtx);
+  QUEUE_MOVE(&item->qmsg, &wq);
+  taosThreadMutexUnlock(&item->mtx);
+
+  int count = 0;
+  while (!QUEUE_IS_EMPTY(&wq)) {
+    queue* h = QUEUE_HEAD(&wq);
+    QUEUE_REMOVE(h);
+    msg = QUEUE_DATA(h, SHttpMsg, q);
+    if (msg->quit) {
+      quitMsg = msg;
     } else {
-      flag = HTTP_FLAT;
+      httpHandleReq(msg);
     }
   }
-  terrno = 0;
+  if (quitMsg) httpHandleQuit(quitMsg);
+}
 
-  char    header[2048] = {0};
-  int32_t headLen = taosBuildHttpHeader(server, contLen, header, sizeof(header), flag);
+static FORCE_INLINE void destroyHttpClient(SHttpClient* cli) {
+  taosMemoryFree(cli->wbuf[0].base);
+  taosMemoryFree(cli->wbuf[1].base);
+  taosMemoryFree(cli->wbuf);
+  taosMemoryFree(cli->rbuf);
+  taosMemoryFree(cli->addr);
+  taosMemoryFree(cli);
+}
+
+static FORCE_INLINE void clientCloseCb(uv_handle_t* handle) {
+  SHttpClient* cli = handle->data;
+  destroyHttpClient(cli);
+}
+
+static FORCE_INLINE void clientAllocBuffCb(uv_handle_t* handle, size_t suggested_size, uv_buf_t* buf) {
+  SHttpClient* cli = handle->data;
+  buf->base = cli->rbuf;
+  buf->len = HTTP_RECV_BUF_SIZE;
+}
+
+static FORCE_INLINE void clientRecvCb(uv_stream_t* handle, ssize_t nread, const uv_buf_t* buf) {
+  SHttpClient* cli = handle->data;
+  if (nread < 0) {
+    tError("http-report recv error:%s", uv_err_name(nread));
+  } else {
+    tTrace("http-report succ to recv %d bytes", (int32_t)nread);
+  }
+  if (!uv_is_closing((uv_handle_t*)&cli->tcp)) {
+    uv_close((uv_handle_t*)&cli->tcp, clientCloseCb);
+  }
+}
+static void clientSentCb(uv_write_t* req, int32_t status) {
+  SHttpClient* cli = req->data;
+  if (status != 0) {
+    tError("http-report failed to send data, reason: %s, dst:%s:%d", uv_strerror(status), cli->addr, cli->port);
+    if (!uv_is_closing((uv_handle_t*)&cli->tcp)) {
+      uv_close((uv_handle_t*)&cli->tcp, clientCloseCb);
+    }
+    return;
+  } else {
+    tTrace("http-report succ to send data");
+  }
+  status = uv_read_start((uv_stream_t*)&cli->tcp, clientAllocBuffCb, clientRecvCb);
+  if (status != 0) {
+    tError("http-report failed to recv data,reason:%s, dst:%s:%d", uv_strerror(status), cli->addr, cli->port);
+    if (!uv_is_closing((uv_handle_t*)&cli->tcp)) {
+      uv_close((uv_handle_t*)&cli->tcp, clientCloseCb);
+    }
+  }
+}
+static void clientConnCb(uv_connect_t* req, int32_t status) {
+  SHttpClient* cli = req->data;
+  if (status != 0) {
+    tError("http-report failed to conn to server, reason:%s, dst:%s:%d", uv_strerror(status), cli->addr, cli->port);
+    if (!uv_is_closing((uv_handle_t*)&cli->tcp)) {
+      uv_close((uv_handle_t*)&cli->tcp, clientCloseCb);
+    }
+    return;
+  }
+  status = uv_write(&cli->req, (uv_stream_t*)&cli->tcp, cli->wbuf, 2, clientSentCb);
+  if (0 != status) {
+    tError("http-report failed to send data,reason:%s, dst:%s:%d", uv_strerror(status), cli->addr, cli->port);
+    if (!uv_is_closing((uv_handle_t*)&cli->tcp)) {
+      uv_close((uv_handle_t*)&cli->tcp, clientCloseCb);
+    }
+  }
+}
+
+int32_t httpSendQuit() {
+  SHttpMsg* msg = taosMemoryCalloc(1, sizeof(SHttpMsg));
+  msg->quit = 1;
+
+  SHttpModule* load = atomic_load_ptr(&thttp);
+  if (load == NULL) {
+    httpDestroyMsg(msg);
+    tError("http-report already released");
+    return -1;
+  } else {
+    msg->http = load;
+  }
+  transAsyncSend(load->asyncPool, &(msg->q));
+  return 0;
+}
+
+static int32_t taosSendHttpReportImpl(const char* server, uint16_t port, char* pCont, int32_t contLen,
+                                      EHttpCompFlag flag) {
+  SHttpMsg* msg = taosMemoryMalloc(sizeof(SHttpMsg));
+  msg->server = strdup(server);
+  msg->port = port;
+  msg->cont = taosMemoryMalloc(contLen);
+  memcpy(msg->cont, pCont, contLen);
+  msg->len = contLen;
+  msg->flag = flag;
+  msg->quit = 0;
+
+  SHttpModule* load = atomic_load_ptr(&thttp);
+  if (load == NULL) {
+    httpDestroyMsg(msg);
+    tError("http-report already released");
+    return -1;
+  } else {
+    msg->http = load;
+    transAsyncSend(load->asyncPool, &(msg->q));
+  }
+
+  return 0;
+}
+
+static void httpDestroyClientCb(uv_handle_t* handle) {
+  SHttpClient* http = handle->data;
+  destroyHttpClient(http);
+}
+static void httpWalkCb(uv_handle_t* handle, void* arg) {
+  // impl later
+  if (!uv_is_closing(handle)) {
+    uv_handle_type type = uv_handle_get_type(handle);
+    if (uv_handle_get_type(handle) == UV_TCP) {
+      uv_close(handle, httpDestroyClientCb);
+    } else {
+      uv_close(handle, NULL);
+    }
+  }
+  return;
+}
+static void httpHandleQuit(SHttpMsg* msg) {
+  SHttpModule* http = msg->http;
+  taosMemoryFree(msg);
+
+  uv_walk(http->loop, httpWalkCb, NULL);
+}
+static void httpHandleReq(SHttpMsg* msg) {
+  SHttpModule* http = msg->http;
+
+  struct sockaddr_in dest = {0};
+  if (taosBuildDstAddr(msg->server, msg->port, &dest) < 0) {
+    goto END;
+  }
+  if (msg->flag == HTTP_GZIP) {
+    int32_t dstLen = taosCompressHttpRport(msg->cont, msg->len);
+    if (dstLen > 0) {
+      msg->len = dstLen;
+    } else {
+      msg->flag = HTTP_FLAT;
+    }
+    if (dstLen < 0) {
+      goto END;
+    }
+  }
+
+  int32_t len = 2048;
+  char*   header = taosMemoryCalloc(1, len);
+  int32_t headLen = taosBuildHttpHeader(msg->server, msg->len, header, len, msg->flag);
+  if (headLen < 0) {
+    taosMemoryFree(header);
+    goto END;
+  }
 
   uv_buf_t* wb = taosMemoryCalloc(2, sizeof(uv_buf_t));
-  wb[0] = uv_buf_init((char*)header, headLen);  // stack var
-  wb[1] = uv_buf_init((char*)pCont, contLen);   //  heap var
+  wb[0] = uv_buf_init((char*)header, strlen(header));  //  heap var
+  wb[1] = uv_buf_init((char*)msg->cont, msg->len);     //  heap var
 
   SHttpClient* cli = taosMemoryCalloc(1, sizeof(SHttpClient));
   cli->conn.data = cli;
@@ -243,41 +376,71 @@ int32_t taosSendHttpReport(const char* server, uint16_t port, char* pCont, int32
   cli->req.data = cli;
   cli->wbuf = wb;
   cli->rbuf = taosMemoryCalloc(1, HTTP_RECV_BUF_SIZE);
-  cli->addr = tstrdup(server);
-  cli->port = port;
+  cli->addr = msg->server;
+  cli->port = msg->port;
+  cli->dest = dest;
+
+  taosMemoryFree(msg);
+
+  uv_tcp_init(http->loop, &cli->tcp);
 
-  uv_loop_t* loop = taosMemoryMalloc(sizeof(uv_loop_t));
-  int        err = uv_loop_init(loop);
-  if (err != 0) {
-    uError("http-report failed to init uv_loop, reason: %s", uv_strerror(err));
-    taosMemoryFree(loop);
-    terrno = TAOS_SYSTEM_ERROR(err);
-    destroyHttpClient(cli);
-    return terrno;
-  }
-  uv_tcp_init(loop, &cli->tcp);
   // set up timeout to avoid stuck;
   int32_t fd = taosCreateSocketWithTimeout(5);
-
-  int ret = uv_tcp_open((uv_tcp_t*)&cli->tcp, fd);
+  int     ret = uv_tcp_open((uv_tcp_t*)&cli->tcp, fd);
   if (ret != 0) {
-    uError("http-report failed to open socket, reason:%s, dst:%s:%d", uv_strerror(ret), cli->addr, cli->port);
+    tError("http-report failed to open socket, reason:%s, dst:%s:%d", uv_strerror(ret), cli->addr, cli->port);
     destroyHttpClient(cli);
-    uv_stop(loop);
-    terrno = TAOS_SYSTEM_ERROR(ret);
-  } else {
-    ret = uv_tcp_connect(&cli->conn, &cli->tcp, (const struct sockaddr*)&dest, clientConnCb);
-    if (ret != 0) {
-      uError("http-report failed to connect to http-server, reason:%s, dst:%s:%d", uv_strerror(ret), cli->addr,
-             cli->port);
-      destroyHttpClient(cli);
-      uv_stop(loop);
-      terrno = TAOS_SYSTEM_ERROR(ret);
-    }
+    return;
   }
 
-  uv_run(loop, UV_RUN_DEFAULT);
-  uv_loop_close(loop);
-  taosMemoryFree(loop);
-  return terrno;
+  ret = uv_tcp_connect(&cli->conn, &cli->tcp, (const struct sockaddr*)&cli->dest, clientConnCb);
+  if (ret != 0) {
+    tError("http-report failed to connect to http-server, reason:%s, dst:%s:%d", uv_strerror(ret), cli->addr,
+           cli->port);
+    destroyHttpClient(cli);
+  }
+  return;
+
+END:
+  tError("http-report failed to report, reason: %s, addr: %s:%d", terrstr(), msg->server, msg->port);
+  httpDestroyMsg(msg);
+}
+
+int32_t taosSendHttpReport(const char* server, uint16_t port, char* pCont, int32_t contLen, EHttpCompFlag flag) {
+  taosThreadOnce(&transHttpInit, transHttpEnvInit);
+  return taosSendHttpReportImpl(server, port, pCont, contLen, flag);
+}
+
+static void transHttpEnvInit() {
+  SHttpModule* http = taosMemoryMalloc(sizeof(SHttpModule));
+
+  http->loop = taosMemoryMalloc(sizeof(uv_loop_t));
+  uv_loop_init(http->loop);
+
+  http->asyncPool = transAsyncPoolCreate(http->loop, 1, http, httpAsyncCb);
+
+  int err = taosThreadCreate(&http->thread, NULL, httpThread, (void*)http);
+  if (err != 0) {
+    taosMemoryFree(http->loop);
+    taosMemoryFree(http);
+    http = NULL;
+  }
+  atomic_store_ptr(&thttp, http);
+}
+
+void transHttpEnvDestroy() {
+  SHttpModule* load = atomic_load_ptr(&thttp);
+  if (load == NULL) {
+    return;
+  }
+  httpSendQuit();
+  taosThreadJoin(load->thread, NULL);
+
+  TRANS_DESTROY_ASYNC_POOL_MSG(load->asyncPool, SHttpMsg, httpDestroyMsg);
+  transAsyncPoolDestroy(load->asyncPool);
+  uv_loop_close(load->loop);
+  taosMemoryFree(load->loop);
+  taosMemoryFree(load);
+
+  atomic_store_ptr(&thttp, NULL);
 }
diff --git a/source/libs/transport/src/trans.c b/source/libs/transport/src/trans.c
index 756a8ff2cf..d3db4879d1 100644
--- a/source/libs/transport/src/trans.c
+++ b/source/libs/transport/src/trans.c
@@ -172,6 +172,8 @@ int32_t rpcInit() {
 }
 void rpcCleanup(void) {
   transCleanup();
+  transHttpEnvDestroy();
+
   return;
 }
 
diff --git a/source/libs/transport/src/transCli.c b/source/libs/transport/src/transCli.c
index 28660934f8..97915e1ded 100644
--- a/source/libs/transport/src/transCli.c
+++ b/source/libs/transport/src/transCli.c
@@ -187,18 +187,8 @@ static void cliReleaseUnfinishedMsg(SCliConn* conn) {
     snprintf(key, sizeof(key), "%s:%d", ip, (int)port); \
   } while (0)
 
-#define CONN_HOST_THREAD_IDX1(idx, exh, refId, pThrd) \
-  do {                                                \
-    if (exh == NULL) {                                \
-      idx = -1;                                       \
-    } else {                                          \
-      ASYNC_CHECK_HANDLE((exh), refId);               \
-      pThrd = (SCliThrd*)(exh)->pThrd;                \
-    }                                                 \
-  } while (0)
-#define CONN_PERSIST_TIME(para)    ((para) <= 90000 ? 90000 : (para))
-#define CONN_GET_HOST_THREAD(conn) (conn ? ((SCliConn*)conn)->hostThrd : NULL)
-#define CONN_GET_INST_LABEL(conn)  (((STrans*)(((SCliThrd*)(conn)->hostThrd)->pTransInst))->label)
+#define CONN_PERSIST_TIME(para)   ((para) <= 90000 ? 90000 : (para))
+#define CONN_GET_INST_LABEL(conn) (((STrans*)(((SCliThrd*)(conn)->hostThrd)->pTransInst))->label)
 
 #define CONN_GET_MSGCTX_BY_AHANDLE(conn, ahandle)                         \
   do {                                                                    \
@@ -217,6 +207,7 @@ static void cliReleaseUnfinishedMsg(SCliConn* conn) {
       tDebug("msg found, %" PRIu64 "", ahandle);                          \
     }                                                                     \
   } while (0)
+
 #define CONN_GET_NEXT_SENDMSG(conn)                 \
   do {                                              \
     int i = 0;                                      \
@@ -231,21 +222,6 @@ static void cliReleaseUnfinishedMsg(SCliConn* conn) {
     }                                               \
   } while (0)
 
-#define CONN_HANDLE_THREAD_QUIT(thrd) \
-  do {                                \
-    if (thrd->quit) {                 \
-      return;                         \
-    }                                 \
-  } while (0)
-
-#define CONN_HANDLE_BROKEN(conn) \
-  do {                           \
-    if (conn->broken) {          \
-      cliHandleExcept(conn);     \
-      return;                    \
-    }                            \
-  } while (0)
-
 #define CONN_SET_PERSIST_BY_APP(conn) \
   do {                                \
     if (conn->status == ConnNormal) { \
diff --git a/source/util/src/tref.c b/source/util/src/tref.c
index c984ef3f34..aa741b909a 100644
--- a/source/util/src/tref.c
+++ b/source/util/src/tref.c
@@ -57,7 +57,7 @@ static void    taosIncRsetCount(SRefSet *pSet);
 static void    taosDecRsetCount(SRefSet *pSet);
 static int32_t taosDecRefCount(int32_t rsetId, int64_t rid, int32_t remove);
 
-int32_t taosOpenRef(int32_t max, void (*fp)(void *)) {
+int32_t taosOpenRef(int32_t max, RefFp fp) {
   SRefNode **nodeList;
   SRefSet   *pSet;
   int64_t   *lockedBy;