diff --git a/include/libs/sync/syncTools.h b/include/libs/sync/syncTools.h
index 4b160c9e61..bd396edf55 100644
--- a/include/libs/sync/syncTools.h
+++ b/include/libs/sync/syncTools.h
@@ -33,7 +33,7 @@ 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, SRpcMsg* msg);
+int32_t syncGetAndDelRespRpc(int64_t rid, uint64_t index, SRpcHandleInfo* pInfo);
 void    syncSetMsgCb(int64_t rid, const SMsgCb* msgcb);
 char*   sync2SimpleStr(int64_t rid);
 
diff --git a/include/libs/transport/trpc.h b/include/libs/transport/trpc.h
index 839194da94..1535f9d290 100644
--- a/include/libs/transport/trpc.h
+++ b/include/libs/transport/trpc.h
@@ -33,7 +33,10 @@ extern int32_t tsRpcHeadSize;
 typedef struct {
   uint32_t clientIp;
   uint16_t clientPort;
-  char     user[TSDB_USER_LEN];
+  union {
+    char    user[TSDB_USER_LEN];
+    int64_t applyIndex;
+  };
 } SRpcConnInfo;
 
 typedef struct SRpcHandleInfo {
diff --git a/source/dnode/mgmt/mgmt_vnode/inc/vmInt.h b/source/dnode/mgmt/mgmt_vnode/inc/vmInt.h
index adc18fdced..0f7daf0e1d 100644
--- a/source/dnode/mgmt/mgmt_vnode/inc/vmInt.h
+++ b/source/dnode/mgmt/mgmt_vnode/inc/vmInt.h
@@ -52,10 +52,9 @@ typedef struct {
 
 typedef struct {
   int32_t     vgId;
-  int32_t     refCount;
   int32_t     vgVersion;
+  int32_t     refCount;
   int8_t      dropped;
-  int8_t      accessState;
   char       *path;
   SVnode     *pImpl;
   STaosQueue *pWriteQ;
diff --git a/source/dnode/mgmt/mgmt_vnode/src/vmHandle.c b/source/dnode/mgmt/mgmt_vnode/src/vmHandle.c
index 4c5a32536f..0ae6c2b336 100644
--- a/source/dnode/mgmt/mgmt_vnode/src/vmHandle.c
+++ b/source/dnode/mgmt/mgmt_vnode/src/vmHandle.c
@@ -323,7 +323,6 @@ SArray *vmGetMsgHandles() {
   if (dmSetMgmtHandle(pArray, TDMT_MON_VM_INFO, vmPutMsgToMonitorQueue, 0) == NULL) goto _OVER;
   if (dmSetMgmtHandle(pArray, TDMT_MON_VM_LOAD, vmPutMsgToMonitorQueue, 0) == NULL) goto _OVER;
 
-  // Requests handled by VNODE
   if (dmSetMgmtHandle(pArray, TDMT_VND_SUBMIT, vmPutMsgToWriteQueue, 0) == NULL) goto _OVER;
   if (dmSetMgmtHandle(pArray, TDMT_VND_QUERY, vmPutMsgToQueryQueue, 0) == NULL) goto _OVER;
   if (dmSetMgmtHandle(pArray, TDMT_VND_QUERY_CONTINUE, vmPutMsgToQueryQueue, 0) == NULL) goto _OVER;
diff --git a/source/dnode/mgmt/mgmt_vnode/src/vmInt.c b/source/dnode/mgmt/mgmt_vnode/src/vmInt.c
index 23927255bb..9e4e7713f2 100644
--- a/source/dnode/mgmt/mgmt_vnode/src/vmInt.c
+++ b/source/dnode/mgmt/mgmt_vnode/src/vmInt.c
@@ -49,10 +49,9 @@ int32_t vmOpenVnode(SVnodeMgmt *pMgmt, SWrapperCfg *pCfg, SVnode *pImpl) {
   }
 
   pVnode->vgId = pCfg->vgId;
-  pVnode->refCount = 0;
   pVnode->vgVersion = pCfg->vgVersion;
+  pVnode->refCount = 0;
   pVnode->dropped = 0;
-  pVnode->accessState = TSDB_VN_ALL_ACCCESS;
   pVnode->path = tstrdup(pCfg->path);
   pVnode->pImpl = pImpl;
 
@@ -96,7 +95,7 @@ void vmCloseVnode(SVnodeMgmt *pMgmt, SVnodeObj *pVnode) {
   dDebug("vgId:%d, vnode is closed", pVnode->vgId);
 
   if (pVnode->dropped) {
-    dDebug("vgId:%d, vnode is destroyed for dropped:%d", pVnode->vgId, pVnode->dropped);
+    dInfo("vgId:%d, vnode is destroyed, dropped:%d", pVnode->vgId, pVnode->dropped);
     snprintf(path, TSDB_FILENAME_LEN, "vnode%svnode%d", TD_DIRSEP, pVnode->vgId);
     vnodeDestroy(path, pMgmt->pTfs);
   }
diff --git a/source/dnode/mgmt/mgmt_vnode/src/vmWorker.c b/source/dnode/mgmt/mgmt_vnode/src/vmWorker.c
index 427b3d5c94..b6913f93f2 100644
--- a/source/dnode/mgmt/mgmt_vnode/src/vmWorker.c
+++ b/source/dnode/mgmt/mgmt_vnode/src/vmWorker.c
@@ -53,9 +53,9 @@ static void vmProcessMgmtQueue(SQueueInfo *pInfo, SRpcMsg *pMsg) {
   }
 
   if (IsReq(pMsg)) {
-    if (code != 0 && terrno != 0) {
+    if (code != 0) {
+      if (terrno != 0) code = terrno;
       dError("msg:%p failed to process since %s", pMsg, terrstr());
-      code = terrno;
     }
     vmSendRsp(pMsg, code);
   }
@@ -97,110 +97,6 @@ static void vmProcessFetchQueue(SQueueInfo *pInfo, SRpcMsg *pMsg) {
   taosFreeQitem(pMsg);
 }
 
-static void vmProcessWriteQueue(SQueueInfo *pInfo, STaosQall *qall, int32_t numOfMsgs) {
-  int32_t    code = 0;
-  SRpcMsg   *pMsg = NULL;
-  SVnodeObj *pVnode = pInfo->ahandle;
-  int64_t    sync = vnodeGetSyncHandle(pVnode->pImpl);
-  SArray    *pArray = taosArrayInit(numOfMsgs, sizeof(SRpcMsg **));
-
-  for (int32_t m = 0; m < numOfMsgs; m++) {
-    if (taosGetQitem(qall, (void **)&pMsg) == 0) continue;
-    dTrace("vgId:%d, msg:%p get from vnode-write queue", pVnode->vgId, pMsg);
-
-    if (taosArrayPush(pArray, &pMsg) == NULL) {
-      dError("vgId:%d, failed to push msg:%p to vnode-write array", pVnode->vgId, pMsg);
-      vmSendRsp(pMsg, TSDB_CODE_OUT_OF_MEMORY);
-    }
-  }
-
-  for (int32_t m = 0; m < taosArrayGetSize(pArray); m++) {
-    pMsg = *(SRpcMsg **)taosArrayGet(pArray, m);
-    code = vnodePreprocessReq(pVnode->pImpl, pMsg);
-
-    if (code == TSDB_CODE_ACTION_IN_PROGRESS) {
-      dTrace("vgId:%d, msg:%p in progress and no rsp", pVnode->vgId, pMsg);
-      continue;
-    }
-
-    if (pMsg->msgType != TDMT_VND_ALTER_REPLICA) {
-      code = syncPropose(sync, pMsg, false);
-    }
-
-    if (code == TAOS_SYNC_PROPOSE_SUCCESS) {
-      dTrace("vgId:%d, msg:%p is proposed and no rsp", pVnode->vgId, pMsg);
-      continue;
-    } else if (code == TAOS_SYNC_PROPOSE_NOT_LEADER) {
-      SEpSet newEpSet = {0};
-      syncGetEpSet(sync, &newEpSet);
-      SEp *pEp = &newEpSet.eps[newEpSet.inUse];
-      if (pEp->port == tsServerPort && strcmp(pEp->fqdn, tsLocalFqdn) == 0) {
-        newEpSet.inUse = (newEpSet.inUse + 1) % newEpSet.numOfEps;
-      }
-
-      dTrace("vgId:%d, msg:%p is redirect since not leader, numOfEps:%d inUse:%d", pVnode->vgId, pMsg,
-             newEpSet.numOfEps, newEpSet.inUse);
-      for (int32_t i = 0; i < newEpSet.numOfEps; ++i) {
-        dTrace("vgId:%d, msg:%p ep:%s:%u", pVnode->vgId, pMsg, newEpSet.eps[i].fqdn, newEpSet.eps[i].port);
-      }
-
-      SRpcMsg rsp = {.code = TSDB_CODE_RPC_REDIRECT, .info = pMsg->info};
-      tmsgSendRedirectRsp(&rsp, &newEpSet);
-    } else {
-      dError("vgId:%d, msg:%p failed to propose write since %s, code:0x%x", pVnode->vgId, pMsg, tstrerror(code), code);
-      vmSendRsp(pMsg, code);
-    }
-  }
-
-  for (int32_t i = 0; i < numOfMsgs; i++) {
-    pMsg = *(SRpcMsg **)taosArrayGet(pArray, i);
-    dTrace("vgId:%d, msg:%p is freed", pVnode->vgId, pMsg);
-    rpcFreeCont(pMsg->pCont);
-    taosFreeQitem(pMsg);
-  }
-
-  taosArrayDestroy(pArray);
-}
-
-static void vmProcessApplyQueue(SQueueInfo *pInfo, STaosQall *qall, int32_t numOfMsgs) {
-  SVnodeObj *pVnode = pInfo->ahandle;
-  SRpcMsg   *pMsg = NULL;
-
-  for (int32_t i = 0; i < numOfMsgs; ++i) {
-    if (taosGetQitem(qall, (void **)&pMsg) == 0) continue;
-    dTrace("vgId:%d, msg:%p get from vnode-apply queue", pVnode->vgId, pMsg);
-
-    // init response rpc msg
-    SRpcMsg rsp = {0};
-
-    // get original rpc msg
-    assert(pMsg->msgType == TDMT_SYNC_APPLY_MSG);
-    SyncApplyMsg *pSyncApplyMsg = syncApplyMsgFromRpcMsg2(pMsg);
-    syncApplyMsgLog2("==vmProcessApplyQueue==", pSyncApplyMsg);
-    SRpcMsg originalRpcMsg;
-    syncApplyMsg2OriginalRpcMsg(pSyncApplyMsg, &originalRpcMsg);
-
-    // apply data into tsdb
-    if (vnodeProcessWriteReq(pVnode->pImpl, &originalRpcMsg, pSyncApplyMsg->fsmMeta.index, &rsp) < 0) {
-      rsp.code = terrno;
-      dError("vgId:%d, msg:%p failed to apply since %s", pVnode->vgId, pMsg, terrstr());
-    }
-
-    syncApplyMsgDestroy(pSyncApplyMsg);
-    rpcFreeCont(originalRpcMsg.pCont);
-
-    // if leader, send response
-    if (pMsg->info.handle != NULL) {
-      rsp.info = pMsg->info;
-      tmsgSendRsp(&rsp);
-    }
-
-    dTrace("vgId:%d, msg:%p is freed, code:0x%x", pVnode->vgId, pMsg, rsp.code);
-    rpcFreeCont(pMsg->pCont);
-    taosFreeQitem(pMsg);
-  }
-}
-
 static void vmProcessSyncQueue(SQueueInfo *pInfo, STaosQall *qall, int32_t numOfMsgs) {
   SVnodeObj *pVnode = pInfo->ahandle;
   SRpcMsg   *pMsg = NULL;
@@ -322,7 +218,7 @@ int32_t vmPutRpcMsgToQueue(SVnodeMgmt *pMgmt, EQueueType qtype, SRpcMsg *pRpc) {
   if (pMsg == NULL) return -1;
 
   SMsgHead *pHead = pRpc->pCont;
-  dTrace("vgId:%d, msg:%p is created, type:%s", pHead->vgId, pMsg, TMSG_INFO(pMsg->msgType));
+  dTrace("vgId:%d, msg:%p is created, type:%s", pHead->vgId, pMsg, TMSG_INFO(pRpc->msgType));
 
   pHead->contLen = htonl(pHead->contLen);
   pHead->vgId = htonl(pHead->vgId);
@@ -362,9 +258,9 @@ int32_t vmGetQueueSize(SVnodeMgmt *pMgmt, int32_t vgId, EQueueType qtype) {
 }
 
 int32_t vmAllocQueue(SVnodeMgmt *pMgmt, SVnodeObj *pVnode) {
-  pVnode->pWriteQ = tWWorkerAllocQueue(&pMgmt->writePool, pVnode, (FItems)vmProcessWriteQueue);
+  pVnode->pWriteQ = tWWorkerAllocQueue(&pMgmt->writePool, pVnode->pImpl, (FItems)vnodeProposeMsg);
   pVnode->pSyncQ = tWWorkerAllocQueue(&pMgmt->syncPool, pVnode, (FItems)vmProcessSyncQueue);
-  pVnode->pApplyQ = tWWorkerAllocQueue(&pMgmt->writePool, pVnode, (FItems)vmProcessApplyQueue);
+  pVnode->pApplyQ = tWWorkerAllocQueue(&pMgmt->writePool, pVnode->pImpl, (FItems)vnodeApplyMsg);
   pVnode->pQueryQ = tQWorkerAllocQueue(&pMgmt->queryPool, pVnode, (FItem)vmProcessQueryQueue);
   pVnode->pFetchQ = tQWorkerAllocQueue(&pMgmt->fetchPool, pVnode, (FItem)vmProcessFetchQueue);
   pVnode->pMergeQ = tWWorkerAllocQueue(&pMgmt->mergePool, pVnode, (FItems)vmProcessMergeQueue);
@@ -381,8 +277,8 @@ int32_t vmAllocQueue(SVnodeMgmt *pMgmt, SVnodeObj *pVnode) {
 
 void vmFreeQueue(SVnodeMgmt *pMgmt, SVnodeObj *pVnode) {
   tWWorkerFreeQueue(&pMgmt->writePool, pVnode->pWriteQ);
-  tWWorkerFreeQueue(&pMgmt->syncPool, pVnode->pSyncQ);
   tWWorkerFreeQueue(&pMgmt->writePool, pVnode->pApplyQ);
+  tWWorkerFreeQueue(&pMgmt->syncPool, pVnode->pSyncQ);
   tQWorkerFreeQueue(&pMgmt->queryPool, pVnode->pQueryQ);
   tQWorkerFreeQueue(&pMgmt->fetchPool, pVnode->pFetchQ);
   tWWorkerFreeQueue(&pMgmt->mergePool, pVnode->pMergeQ);
diff --git a/source/dnode/vnode/inc/vnode.h b/source/dnode/vnode/inc/vnode.h
index 8c7a78a5af..01e57d5eaf 100644
--- a/source/dnode/vnode/inc/vnode.h
+++ b/source/dnode/vnode/inc/vnode.h
@@ -71,6 +71,9 @@ int32_t vnodeSnapshotReaderClose(SVSnapshotReader *pReader);
 int32_t vnodeSnapshotRead(SVSnapshotReader *pReader, const void **ppData, uint32_t *nData);
 int32_t vnodeProcessCreateTSma(SVnode *pVnode, void *pCont, uint32_t contLen);
 
+void vnodeProposeMsg(SQueueInfo *pInfo, STaosQall *qall, int32_t numOfMsgs);
+void vnodeApplyMsg(SQueueInfo *pInfo, STaosQall *qall, int32_t numOfMsgs);
+
 // meta
 typedef struct SMeta       SMeta;  // todo: remove
 typedef struct SMetaReader SMetaReader;
diff --git a/source/dnode/vnode/src/inc/vnd.h b/source/dnode/vnode/src/inc/vnd.h
index 5f4f7e70da..b0599b82ef 100644
--- a/source/dnode/vnode/src/inc/vnd.h
+++ b/source/dnode/vnode/src/inc/vnd.h
@@ -84,7 +84,6 @@ int32_t vnodeAsyncCommit(SVnode* pVnode);
 int32_t vnodeSyncOpen(SVnode* pVnode, char* path);
 void    vnodeSyncStart(SVnode* pVnode);
 void    vnodeSyncClose(SVnode* pVnode);
-int32_t vnodeSyncAlter(SVnode* pVnode, SRpcMsg* pMsg);
 
 #ifdef __cplusplus
 }
diff --git a/source/dnode/vnode/src/inc/vnodeInt.h b/source/dnode/vnode/src/inc/vnodeInt.h
index de2fc03f69..5532f202fc 100644
--- a/source/dnode/vnode/src/inc/vnodeInt.h
+++ b/source/dnode/vnode/src/inc/vnodeInt.h
@@ -220,8 +220,10 @@ struct SVnode {
   SWal*      pWal;
   STQ*       pTq;
   SSink*     pSink;
-  int64_t    sync;
   tsem_t     canCommit;
+  int64_t    sync;
+  int32_t    syncCount;
+  sem_t      syncSem;
   SQHandle*  pQuery;
 };
 
diff --git a/source/dnode/vnode/src/vnd/vnodeOpen.c b/source/dnode/vnode/src/vnd/vnodeOpen.c
index a85b830616..dfc258b42b 100644
--- a/source/dnode/vnode/src/vnd/vnodeOpen.c
+++ b/source/dnode/vnode/src/vnd/vnodeOpen.c
@@ -81,7 +81,9 @@ SVnode *vnodeOpen(const char *path, STfs *pTfs, SMsgCb msgCb) {
   pVnode->state.applied = info.state.committed;
   pVnode->pTfs = pTfs;
   pVnode->msgCb = msgCb;
+  pVnode->syncCount = 0;
 
+  tsem_init(&pVnode->syncSem, 0, 0);
   tsem_init(&(pVnode->canCommit), 0, 1);
 
   // open buffer pool
@@ -175,6 +177,7 @@ void vnodeClose(SVnode *pVnode) {
     vnodeCloseBufPool(pVnode);
     // destroy handle
     tsem_destroy(&(pVnode->canCommit));
+    tsem_destroy(&pVnode->syncSem);
     taosMemoryFree(pVnode);
   }
 }
diff --git a/source/dnode/vnode/src/vnd/vnodeSvr.c b/source/dnode/vnode/src/vnd/vnodeSvr.c
index 7a9c9ef393..1524d8fe6f 100644
--- a/source/dnode/vnode/src/vnd/vnodeSvr.c
+++ b/source/dnode/vnode/src/vnd/vnodeSvr.c
@@ -91,9 +91,6 @@ int32_t vnodePreprocessReq(SVnode *pVnode, SRpcMsg *pMsg) {
       }
 
     } break;
-    case TDMT_VND_ALTER_REPLICA: {
-      code = vnodeSyncAlter(pVnode, pMsg);
-    } break;
     default:
       break;
   }
@@ -107,7 +104,7 @@ int32_t vnodeProcessWriteReq(SVnode *pVnode, SRpcMsg *pMsg, int64_t version, SRp
   int32_t len;
   int32_t ret;
 
-  vTrace("vgId:%d, start to process write request %s, version %" PRId64, TD_VID(pVnode), TMSG_INFO(pMsg->msgType),
+  vTrace("vgId:%d, start to process write request %s, index:%" PRId64, TD_VID(pVnode), TMSG_INFO(pMsg->msgType),
          version);
 
   pVnode->state.applied = version;
@@ -173,7 +170,7 @@ int32_t vnodeProcessWriteReq(SVnode *pVnode, SRpcMsg *pMsg, int64_t version, SRp
       break;
   }
 
-  vTrace("vgId:%d, process %s request success, version: %" PRId64, TD_VID(pVnode), TMSG_INFO(pMsg->msgType), version);
+  vTrace("vgId:%d, process %s request success, index:%" PRId64, TD_VID(pVnode), TMSG_INFO(pMsg->msgType), version);
 
   if (tqPushMsg(pVnode->pTq, pMsg->pCont, pMsg->contLen, pMsg->msgType, version) < 0) {
     vError("vgId:%d, failed to push msg to TQ since %s", TD_VID(pVnode), tstrerror(terrno));
diff --git a/source/dnode/vnode/src/vnd/vnodeSync.c b/source/dnode/vnode/src/vnd/vnodeSync.c
index 8f98e9cec5..203eecd8ab 100644
--- a/source/dnode/vnode/src/vnd/vnodeSync.c
+++ b/source/dnode/vnode/src/vnd/vnodeSync.c
@@ -16,13 +16,239 @@
 #define _DEFAULT_SOURCE
 #include "vnd.h"
 
-static int32_t   vnodeSyncEqMsg(const SMsgCb *msgcb, SRpcMsg *pMsg);
-static int32_t   vnodeSyncSendMsg(const SEpSet *pEpSet, SRpcMsg *pMsg);
-static SSyncFSM *vnodeSyncMakeFsm(SVnode *pVnode);
-static void      vnodeSyncCommitMsg(SSyncFSM *pFsm, const SRpcMsg *pMsg, SFsmCbMeta cbMeta);
-static void      vnodeSyncPreCommitMsg(SSyncFSM *pFsm, const SRpcMsg *pMsg, SFsmCbMeta cbMeta);
-static void      vnodeSyncRollBackMsg(SSyncFSM *pFsm, const SRpcMsg *pMsg, SFsmCbMeta cbMeta);
-static int32_t   vnodeSyncGetSnapshot(SSyncFSM *pFsm, SSnapshot *pSnapshot);
+static inline bool vnodeIsMsgBlock(tmsg_t type) {
+  return (type == TDMT_VND_CREATE_TABLE) || (type == TDMT_VND_ALTER_CONFIRM) || (type == TDMT_VND_ALTER_REPLICA);
+}
+
+static inline bool vnodeIsMsgWeak(tmsg_t type) { return false; }
+
+static inline void vnodeAccumBlockMsg(SVnode *pVnode, tmsg_t type) {
+  if (!vnodeIsMsgBlock(type)) return;
+
+  int32_t count = atomic_add_fetch_32(&pVnode->syncCount, 1);
+  vTrace("vgId:%d, accum block, count:%d type:%s", pVnode->config.vgId, count, TMSG_INFO(type));
+}
+
+static inline void vnodeWaitBlockMsg(SVnode *pVnode) {
+  int32_t count = atomic_load_32(&pVnode->syncCount);
+  if (count <= 0) return;
+
+  vTrace("vgId:%d, wait block finish, count:%d", pVnode->config.vgId, count);
+  tsem_wait(&pVnode->syncSem);
+}
+
+static inline void vnodePostBlockMsg(SVnode *pVnode, tmsg_t type) {
+  if (!vnodeIsMsgBlock(type)) return;
+
+  int32_t count = atomic_load_32(&pVnode->syncCount);
+  if (count <= 0) return;
+
+  count = atomic_sub_fetch_32(&pVnode->syncCount, 1);
+  vTrace("vgId:%d, post block, count:%d type:%s", pVnode->config.vgId, count, TMSG_INFO(type));
+  if (count <= 0) {
+    tsem_post(&pVnode->syncSem);
+  }
+}
+
+static int32_t vnodeProcessSyncReconfigReq(SVnode *pVnode, SRpcMsg *pMsg) {
+  SAlterVnodeReq req = {0};
+  if (tDeserializeSAlterVnodeReq((char *)pMsg->pCont + sizeof(SMsgHead), pMsg->contLen - sizeof(SMsgHead), &req) != 0) {
+    terrno = TSDB_CODE_INVALID_MSG;
+    return TSDB_CODE_INVALID_MSG;
+  }
+
+  vInfo("vgId:%d, start to alter vnode replica to %d", TD_VID(pVnode), req.replica);
+  SSyncCfg cfg = {.replicaNum = req.replica, .myIndex = req.selfIndex};
+  for (int32_t r = 0; r < req.replica; ++r) {
+    SNodeInfo *pNode = &cfg.nodeInfo[r];
+    tstrncpy(pNode->nodeFqdn, req.replicas[r].fqdn, sizeof(pNode->nodeFqdn));
+    pNode->nodePort = req.replicas[r].port;
+    vInfo("vgId:%d, replica:%d %s:%u", TD_VID(pVnode), r, pNode->nodeFqdn, pNode->nodePort);
+  }
+
+  return syncReconfig(pVnode->sync, &cfg);
+}
+
+void vnodeProposeMsg(SQueueInfo *pInfo, STaosQall *qall, int32_t numOfMsgs) {
+  SVnode  *pVnode = pInfo->ahandle;
+  int32_t  vgId = pVnode->config.vgId;
+  int32_t  code = 0;
+  SRpcMsg *pMsg = NULL;
+
+  for (int32_t m = 0; m < numOfMsgs; m++) {
+    if (taosGetQitem(qall, (void **)&pMsg) == 0) continue;
+    vTrace("vgId:%d, msg:%p get from vnode-write queue handle:%p", vgId, pMsg, pMsg->info.handle);
+
+    if (pMsg->msgType == TDMT_VND_ALTER_REPLICA) {
+      code = vnodeProcessSyncReconfigReq(pVnode, pMsg);
+    } else {
+      code = vnodePreprocessReq(pVnode, pMsg);
+      if (code != 0) {
+        vError("vgId:%d, failed to pre-process msg:%p since %s", vgId, pMsg, terrstr());
+      } else {
+        code = syncPropose(pVnode->sync, pMsg, vnodeIsMsgWeak(pMsg->msgType));
+      }
+    }
+
+    if (code == 0) {
+      vnodeAccumBlockMsg(pVnode, pMsg->msgType);
+      if (pMsg->msgType == TDMT_VND_ALTER_REPLICA) {
+        // todo refactor
+        SRpcMsg rsp = {.code = code, .info = pMsg->info};
+        tmsgSendRsp(&rsp);
+      }
+    } else if (code == TAOS_SYNC_PROPOSE_NOT_LEADER) {
+      SEpSet newEpSet = {0};
+      syncGetEpSet(pVnode->sync, &newEpSet);
+      SEp *pEp = &newEpSet.eps[newEpSet.inUse];
+      if (pEp->port == tsServerPort && strcmp(pEp->fqdn, tsLocalFqdn) == 0) {
+        newEpSet.inUse = (newEpSet.inUse + 1) % newEpSet.numOfEps;
+      }
+
+      vTrace("vgId:%d, msg:%p is redirect since not leader, numOfEps:%d inUse:%d", vgId, pMsg, newEpSet.numOfEps,
+             newEpSet.inUse);
+      for (int32_t i = 0; i < newEpSet.numOfEps; ++i) {
+        vTrace("vgId:%d, msg:%p redirect:%d ep:%s:%u", vgId, pMsg, i, newEpSet.eps[i].fqdn, newEpSet.eps[i].port);
+      }
+
+      SRpcMsg rsp = {.code = TSDB_CODE_RPC_REDIRECT, .info = pMsg->info};
+      tmsgSendRedirectRsp(&rsp, &newEpSet);
+    } else {
+      if (terrno != 0) code = terrno;
+      vError("vgId:%d, msg:%p failed to propose since %s, code:0x%x", vgId, pMsg, tstrerror(code), code);
+      SRpcMsg rsp = {.code = code, .info = pMsg->info};
+      tmsgSendRsp(&rsp);
+    }
+
+    vTrace("vgId:%d, msg:%p is freed, code:0x%x", vgId, pMsg, code);
+    rpcFreeCont(pMsg->pCont);
+    taosFreeQitem(pMsg);
+  }
+
+  vnodeWaitBlockMsg(pVnode);
+}
+
+void vnodeApplyMsg(SQueueInfo *pInfo, STaosQall *qall, int32_t numOfMsgs) {
+  SVnode  *pVnode = pInfo->ahandle;
+  int32_t  vgId = pVnode->config.vgId;
+  int32_t  code = 0;
+  SRpcMsg *pMsg = NULL;
+
+  for (int32_t i = 0; i < numOfMsgs; ++i) {
+    if (taosGetQitem(qall, (void **)&pMsg) == 0) continue;
+    vTrace("vgId:%d, msg:%p get from vnode-apply queue, handle:%p", vgId, pMsg, pMsg->info.handle);
+
+    SRpcMsg rsp = {.code = pMsg->code, .info = pMsg->info};
+    if (rsp.code == 0) {
+      if (vnodeProcessWriteReq(pVnode, pMsg, pMsg->conn.applyIndex, &rsp) < 0) {
+        rsp.code = terrno;
+        vError("vgId:%d, msg:%p failed to apply since %s", vgId, pMsg, terrstr());
+      }
+    }
+
+    vnodePostBlockMsg(pVnode, pMsg->msgType);
+    if (rsp.info.handle != NULL) {
+      tmsgSendRsp(&rsp);
+    }
+
+    vTrace("vgId:%d, msg:%p is freed, code:0x%x", vgId, pMsg, rsp.code);
+    rpcFreeCont(pMsg->pCont);
+    taosFreeQitem(pMsg);
+  }
+}
+
+static int32_t vnodeSyncEqMsg(const SMsgCb *msgcb, SRpcMsg *pMsg) {
+  int32_t code = tmsgPutToQueue(msgcb, SYNC_QUEUE, pMsg);
+  if (code != 0) {
+    rpcFreeCont(pMsg->pCont);
+    pMsg->pCont = NULL;
+  }
+  return code;
+}
+
+static int32_t vnodeSyncSendMsg(const SEpSet *pEpSet, SRpcMsg *pMsg) {
+  int32_t code = tmsgSendReq(pEpSet, pMsg);
+  if (code != 0) {
+    rpcFreeCont(pMsg->pCont);
+    pMsg->pCont = NULL;
+  }
+  return code;
+}
+
+static int32_t vnodeSyncGetSnapshot(SSyncFSM *pFsm, SSnapshot *pSnapshot) {
+  vnodeGetSnapshot(pFsm->data, pSnapshot);
+  return 0;
+}
+
+static void vnodeSyncReconfig(struct SSyncFSM *pFsm, SSyncCfg newCfg, SReConfigCbMeta cbMeta) {
+  SVnode *pVnode = pFsm->data;
+  vInfo("vgId:%d, sync reconfig is confirmed", TD_VID(pVnode));
+
+  // todo rpc response here
+  // build rpc msg
+  // put into apply queue
+}
+
+static void vnodeSyncCommitMsg(SSyncFSM *pFsm, const SRpcMsg *pMsg, SFsmCbMeta cbMeta) {
+  SVnode   *pVnode = pFsm->data;
+  SSnapshot snapshot = {0};
+  SyncIndex beginIndex = SYNC_INDEX_INVALID;
+  char      logBuf[256] = {0};
+
+  if (pFsm->FpGetSnapshot != NULL) {
+    (*pFsm->FpGetSnapshot)(pFsm, &snapshot);
+    beginIndex = snapshot.lastApplyIndex;
+  }
+
+  if (cbMeta.index > beginIndex) {
+    snprintf(
+        logBuf, sizeof(logBuf),
+        "==callback== ==CommitCb== execute, pFsm:%p, index:%ld, isWeak:%d, code:%d, state:%d %s, beginIndex :%ld\n",
+        pFsm, cbMeta.index, cbMeta.isWeak, cbMeta.code, cbMeta.state, syncUtilState2String(cbMeta.state), beginIndex);
+    syncRpcMsgLog2(logBuf, (SRpcMsg *)pMsg);
+
+    SRpcMsg rpcMsg = {.msgType = pMsg->msgType, .contLen = pMsg->contLen, .conn.applyIndex = cbMeta.index};
+    rpcMsg.pCont = rpcMallocCont(rpcMsg.contLen);
+    memcpy(rpcMsg.pCont, pMsg->pCont, pMsg->contLen);
+    syncGetAndDelRespRpc(pVnode->sync, cbMeta.seqNum, &rpcMsg.info);
+    tmsgPutToQueue(&pVnode->msgCb, APPLY_QUEUE, &rpcMsg);
+  } else {
+    char logBuf[256] = {0};
+    snprintf(logBuf, sizeof(logBuf),
+             "==callback== ==CommitCb== do not execute, pFsm:%p, index:%ld, isWeak:%d, code:%d, state:%d %s, "
+             "beginIndex :%ld\n",
+             pFsm, cbMeta.index, cbMeta.isWeak, cbMeta.code, cbMeta.state, syncUtilState2String(cbMeta.state),
+             beginIndex);
+    syncRpcMsgLog2(logBuf, (SRpcMsg *)pMsg);
+  }
+}
+
+static void vnodeSyncPreCommitMsg(SSyncFSM *pFsm, const SRpcMsg *pMsg, SFsmCbMeta cbMeta) {
+  char logBuf[256] = {0};
+  snprintf(logBuf, sizeof(logBuf),
+           "==callback== ==PreCommitCb== pFsm:%p, index:%ld, isWeak:%d, code:%d, state:%d %s \n", pFsm, cbMeta.index,
+           cbMeta.isWeak, cbMeta.code, cbMeta.state, syncUtilState2String(cbMeta.state));
+  syncRpcMsgLog2(logBuf, (SRpcMsg *)pMsg);
+}
+
+static void vnodeSyncRollBackMsg(SSyncFSM *pFsm, const SRpcMsg *pMsg, SFsmCbMeta cbMeta) {
+  char logBuf[256] = {0};
+  snprintf(logBuf, sizeof(logBuf), "==callback== ==RollBackCb== pFsm:%p, index:%ld, isWeak:%d, code:%d, state:%d %s \n",
+           pFsm, cbMeta.index, cbMeta.isWeak, cbMeta.code, cbMeta.state, syncUtilState2String(cbMeta.state));
+  syncRpcMsgLog2(logBuf, (SRpcMsg *)pMsg);
+}
+
+static SSyncFSM *vnodeSyncMakeFsm(SVnode *pVnode) {
+  SSyncFSM *pFsm = taosMemoryCalloc(1, sizeof(SSyncFSM));
+  pFsm->data = pVnode;
+  pFsm->FpCommitCb = vnodeSyncCommitMsg;
+  pFsm->FpPreCommitCb = vnodeSyncPreCommitMsg;
+  pFsm->FpRollBackCb = vnodeSyncRollBackMsg;
+  pFsm->FpGetSnapshot = vnodeSyncGetSnapshot;
+  pFsm->FpRestoreFinishCb = NULL;
+  pFsm->FpReConfigCb = vnodeSyncReconfig;
+  return pFsm;
+}
 
 int32_t vnodeSyncOpen(SVnode *pVnode, char *path) {
   SSyncInfo syncInfo = {
@@ -50,33 +276,6 @@ int32_t vnodeSyncOpen(SVnode *pVnode, char *path) {
   return 0;
 }
 
-int32_t vnodeSyncAlter(SVnode *pVnode, SRpcMsg *pMsg) {
-  SAlterVnodeReq req = {0};
-  if (tDeserializeSAlterVnodeReq((char *)pMsg->pCont + sizeof(SMsgHead), pMsg->contLen - sizeof(SMsgHead), &req) != 0) {
-    terrno = TSDB_CODE_INVALID_MSG;
-    return TSDB_CODE_INVALID_MSG;
-  }
-
-  vInfo("vgId:%d, start to alter vnode replica to %d", TD_VID(pVnode), req.replica);
-  SSyncCfg cfg = {.replicaNum = req.replica, .myIndex = req.selfIndex};
-  for (int32_t r = 0; r < req.replica; ++r) {
-    SNodeInfo *pNode = &cfg.nodeInfo[r];
-    tstrncpy(pNode->nodeFqdn, req.replicas[r].fqdn, sizeof(pNode->nodeFqdn));
-    pNode->nodePort = req.replicas[r].port;
-    vInfo("vgId:%d, replica:%d %s:%u", TD_VID(pVnode), r, pNode->nodeFqdn, pNode->nodePort);
-  }
-
-  int32_t code = syncReconfig(pVnode->sync, &cfg);
-  if (code == TAOS_SYNC_PROPOSE_SUCCESS) {
-    // todo refactor
-    SRpcMsg rsp = {.info = pMsg->info, .code = 0};
-    tmsgSendRsp(&rsp);
-    return TSDB_CODE_ACTION_IN_PROGRESS;
-  }
-
-  return code;
-}
-
 void vnodeSyncStart(SVnode *pVnode) {
   syncSetMsgCb(pVnode->sync, &pVnode->msgCb);
   if (pVnode->config.standby) {
@@ -87,107 +286,3 @@ void vnodeSyncStart(SVnode *pVnode) {
 }
 
 void vnodeSyncClose(SVnode *pVnode) { syncStop(pVnode->sync); }
-
-int32_t vnodeSyncEqMsg(const SMsgCb *msgcb, SRpcMsg *pMsg) {
-  int32_t code = tmsgPutToQueue(msgcb, SYNC_QUEUE, pMsg);
-  if (code != 0) {
-    rpcFreeCont(pMsg->pCont);
-    pMsg->pCont = NULL;
-  }
-  return code;
-}
-
-int32_t vnodeSyncSendMsg(const SEpSet *pEpSet, SRpcMsg *pMsg) {
-  int32_t code = tmsgSendReq(pEpSet, pMsg);
-  if (code != 0) {
-    rpcFreeCont(pMsg->pCont);
-    pMsg->pCont = NULL;
-  }
-  return code;
-}
-
-int32_t vnodeSyncGetSnapshot(SSyncFSM *pFsm, SSnapshot *pSnapshot) {
-  vnodeGetSnapshot(pFsm->data, pSnapshot);
-  return 0;
-}
-
-void vnodeSyncReconfig(struct SSyncFSM *pFsm, SSyncCfg newCfg, SReConfigCbMeta cbMeta) {
-  SVnode *pVnode = pFsm->data;
-  vInfo("vgId:%d, sync reconfig is confirmed", TD_VID(pVnode));
-
-  // todo rpc response here
-}
-
-void vnodeSyncCommitMsg(SSyncFSM *pFsm, const SRpcMsg *pMsg, SFsmCbMeta cbMeta) {
-  SyncIndex beginIndex = SYNC_INDEX_INVALID;
-  if (pFsm->FpGetSnapshot != NULL) {
-    SSnapshot snapshot = {0};
-    pFsm->FpGetSnapshot(pFsm, &snapshot);
-    beginIndex = snapshot.lastApplyIndex;
-  }
-
-  if (cbMeta.index > beginIndex) {
-    char logBuf[256] = {0};
-    snprintf(
-        logBuf, sizeof(logBuf),
-        "==callback== ==CommitCb== execute, pFsm:%p, index:%ld, isWeak:%d, code:%d, state:%d %s, beginIndex :%ld\n",
-        pFsm, cbMeta.index, cbMeta.isWeak, cbMeta.code, cbMeta.state, syncUtilState2String(cbMeta.state), beginIndex);
-    syncRpcMsgLog2(logBuf, (SRpcMsg *)pMsg);
-
-    SVnode       *pVnode = pFsm->data;
-    SyncApplyMsg *pSyncApplyMsg = syncApplyMsgBuild2(pMsg, pVnode->config.vgId, &cbMeta);
-    SRpcMsg       applyMsg;
-    syncApplyMsg2RpcMsg(pSyncApplyMsg, &applyMsg);
-    syncApplyMsgDestroy(pSyncApplyMsg);
-
-    // recover handle for response
-    SRpcMsg saveRpcMsg;
-    int32_t ret = syncGetAndDelRespRpc(pVnode->sync, cbMeta.seqNum, &saveRpcMsg);
-    if (ret == 1 && cbMeta.state == TAOS_SYNC_STATE_LEADER) {
-      applyMsg.info = saveRpcMsg.info;
-    } else {
-      applyMsg.info.handle = NULL;
-      applyMsg.info.ahandle = NULL;
-    }
-
-    // put to applyQ
-    tmsgPutToQueue(&(pVnode->msgCb), APPLY_QUEUE, &applyMsg);
-
-  } else {
-    char logBuf[256] = {0};
-    snprintf(logBuf, sizeof(logBuf),
-             "==callback== ==CommitCb== do not execute, pFsm:%p, index:%ld, isWeak:%d, code:%d, state:%d %s, "
-             "beginIndex :%ld\n",
-             pFsm, cbMeta.index, cbMeta.isWeak, cbMeta.code, cbMeta.state, syncUtilState2String(cbMeta.state),
-             beginIndex);
-    syncRpcMsgLog2(logBuf, (SRpcMsg *)pMsg);
-  }
-}
-
-void vnodeSyncPreCommitMsg(SSyncFSM *pFsm, const SRpcMsg *pMsg, SFsmCbMeta cbMeta) {
-  char logBuf[256] = {0};
-  snprintf(logBuf, sizeof(logBuf),
-           "==callback== ==PreCommitCb== pFsm:%p, index:%ld, isWeak:%d, code:%d, state:%d %s \n", pFsm, cbMeta.index,
-           cbMeta.isWeak, cbMeta.code, cbMeta.state, syncUtilState2String(cbMeta.state));
-  syncRpcMsgLog2(logBuf, (SRpcMsg *)pMsg);
-}
-
-void vnodeSyncRollBackMsg(SSyncFSM *pFsm, const SRpcMsg *pMsg, SFsmCbMeta cbMeta) {
-  char logBuf[256] = {0};
-  snprintf(logBuf, sizeof(logBuf), "==callback== ==RollBackCb== pFsm:%p, index:%ld, isWeak:%d, code:%d, state:%d %s \n",
-           pFsm, cbMeta.index, cbMeta.isWeak, cbMeta.code, cbMeta.state, syncUtilState2String(cbMeta.state));
-  syncRpcMsgLog2(logBuf, (SRpcMsg *)pMsg);
-}
-
-SSyncFSM *vnodeSyncMakeFsm(SVnode *pVnode) {
-  SSyncFSM *pFsm = taosMemoryCalloc(1, sizeof(SSyncFSM));
-  pFsm->data = pVnode;
-  pFsm->FpCommitCb = vnodeSyncCommitMsg;
-  pFsm->FpPreCommitCb = vnodeSyncPreCommitMsg;
-  pFsm->FpRollBackCb = vnodeSyncRollBackMsg;
-  pFsm->FpGetSnapshot = vnodeSyncGetSnapshot;
-  pFsm->FpRestoreFinishCb = NULL;
-  pFsm->FpReConfigCb = vnodeSyncReconfig;
-
-  return pFsm;
-}
\ No newline at end of file
diff --git a/source/libs/sync/src/syncMain.c b/source/libs/sync/src/syncMain.c
index d522b829dd..795d3e3c27 100644
--- a/source/libs/sync/src/syncMain.c
+++ b/source/libs/sync/src/syncMain.c
@@ -281,7 +281,7 @@ int32_t syncGetRespRpc(int64_t rid, uint64_t index, SRpcMsg* msg) {
   return ret;
 }
 
-int32_t syncGetAndDelRespRpc(int64_t rid, uint64_t index, SRpcMsg* msg) {
+int32_t syncGetAndDelRespRpc(int64_t rid, uint64_t index, SRpcHandleInfo* pInfo) {
   SSyncNode* pSyncNode = (SSyncNode*)taosAcquireRef(tsNodeRefId, rid);
   if (pSyncNode == NULL) {
     return TAOS_SYNC_STATE_ERROR;
@@ -291,7 +291,7 @@ int32_t syncGetAndDelRespRpc(int64_t rid, uint64_t index, SRpcMsg* msg) {
   SRespStub stub;
   int32_t   ret = syncRespMgrGetAndDel(pSyncNode->pSyncRespMgr, index, &stub);
   if (ret == 1) {
-    memcpy(msg, &(stub.rpcMsg), sizeof(SRpcMsg));
+    *pInfo = stub.rpcMsg.info;
   }
 
   taosReleaseRef(tsNodeRefId, pSyncNode->rid);