diff --git a/src/connector/go b/src/connector/go
index 66df175edf..050667e5b4 160000
--- a/src/connector/go
+++ b/src/connector/go
@@ -1 +1 @@
-Subproject commit 66df175edf467df6f80d07789f1a35a6d2551310
+Subproject commit 050667e5b4d0eafa5387e4283e713559b421203f
diff --git a/src/dnode/src/dnodeVWrite.c b/src/dnode/src/dnodeVWrite.c
index e0345eb1f6..9d1d16e51e 100644
--- a/src/dnode/src/dnodeVWrite.c
+++ b/src/dnode/src/dnodeVWrite.c
@@ -212,7 +212,7 @@ static void *dnodeProcessVWriteQueue(void *param) {
 
       pWrite->code = vnodeProcessWrite(pVnode, pWrite->pHead, qtype, &pWrite->rspRet);
       if (pWrite->code <= 0) pWrite->processedCount = 1;
-      if (pWrite->pHead->msgType != TSDB_MSG_TYPE_SUBMIT) forceFsync = true;
+      if (pWrite->code == 0 && pWrite->pHead->msgType != TSDB_MSG_TYPE_SUBMIT) forceFsync = true;
 
       dTrace("msg:%p is processed in vwrite queue, result:%s", pWrite, tstrerror(pWrite->code));
     }
@@ -225,11 +225,13 @@ static void *dnodeProcessVWriteQueue(void *param) {
       taosGetQitem(pWorker->qall, &qtype, (void **)&pWrite);
       if (qtype == TAOS_QTYPE_RPC) {
         dnodeSendRpcVWriteRsp(pVnode, pWrite, pWrite->code);
-      } else if (qtype == TAOS_QTYPE_FWD) {
-        vnodeConfirmForward(pVnode, pWrite->pHead->version, 0);
-        taosFreeQitem(pWrite);
-        vnodeRelease(pVnode);
       } else {
+        if (qtype == TAOS_QTYPE_FWD) {
+          vnodeConfirmForward(pVnode, pWrite->pHead->version, 0);
+        }
+        if (pWrite->rspRet.rsp) {
+          rpcFreeCont(pWrite->rspRet.rsp);
+        }
         taosFreeQitem(pWrite);
         vnodeRelease(pVnode);
       }
diff --git a/src/inc/tsdb.h b/src/inc/tsdb.h
index 0cdb24a4da..a913deea37 100644
--- a/src/inc/tsdb.h
+++ b/src/inc/tsdb.h
@@ -126,7 +126,7 @@ uint32_t tsdbGetFileInfo(TSDB_REPO_T *repo, char *name, uint32_t *index, uint32_
 // the TSDB repository info
 typedef struct STsdbRepoInfo {
   STsdbCfg tsdbCfg;
-  int64_t  version;            // version of the repository
+  uint64_t version;            // version of the repository
   int64_t  tsdbTotalDataSize;  // the original inserted data size
   int64_t  tsdbTotalDiskSize;  // the total disk size taken by this TSDB repository
   // TODO: Other informations to add
@@ -136,7 +136,7 @@ STsdbRepoInfo *tsdbGetStatus(TSDB_REPO_T *pRepo);
 // the meter information report structure
 typedef struct {
   STableCfg tableCfg;
-  int64_t   version;
+  uint64_t  version;
   int64_t   tableTotalDataSize;  // In bytes
   int64_t   tableTotalDiskSize;  // In bytes
 } STableInfo;
diff --git a/src/mnode/src/mnodeSdb.c b/src/mnode/src/mnodeSdb.c
index 12d977f32b..003ecd0d24 100644
--- a/src/mnode/src/mnodeSdb.c
+++ b/src/mnode/src/mnodeSdb.c
@@ -71,7 +71,7 @@ typedef struct _SSdbTable {
 typedef struct {
   ESyncRole  role;
   ESdbStatus status;
-  int64_t    version;
+  uint64_t   version;
   int64_t    sync;
   void *     wal;
   SSyncCfg   cfg;
diff --git a/src/sync/src/syncMain.c b/src/sync/src/syncMain.c
index 8d90315c48..93739ca3d1 100644
--- a/src/sync/src/syncMain.c
+++ b/src/sync/src/syncMain.c
@@ -498,7 +498,7 @@ static SSyncPeer *syncAddPeer(SSyncNode *pNode, const SNodeInfo *pInfo) {
   int32_t ret = strcmp(pPeer->fqdn, tsNodeFqdn);
   if (pPeer->nodeId == 0 || (ret > 0) || (ret == 0 && pPeer->port > tsSyncPort)) {
     int32_t checkMs = 100 + (pNode->vgId * 10) % 100;
-    if (pNode->vgId > 1) checkMs = tsStatusInterval * 2000 + checkMs;
+    if (pNode->vgId > 1) checkMs = tsStatusInterval * 1000 + checkMs;
     sDebug("%s, start to check peer connection after %d ms", pPeer->id, checkMs);
     taosTmrReset(syncCheckPeerConnection, checkMs, pPeer, tsSyncTmrCtrl, &pPeer->timer);
   }
@@ -575,6 +575,17 @@ static void syncChooseMaster(SSyncNode *pNode) {
     if (index == pNode->selfIndex) {
       sInfo("vgId:%d, start to work as master", pNode->vgId);
       nodeRole = TAOS_SYNC_ROLE_MASTER;
+
+#if 0
+      for (int32_t i = 0; i < pNode->replica; ++i) {
+        pPeer = pNode->peerInfo[i];
+        if (pPeer->version == nodeVersion) {
+          pPeer->role = TAOS_SYNC_ROLE_SLAVE;
+          pPeer->sstatus = TAOS_SYNC_STATUS_CACHE;
+          sInfo("%s, it shall work as slave", pPeer->id);
+        }
+      }
+#endif
       syncResetFlowCtrl(pNode);
       (*pNode->notifyRole)(pNode->ahandle, nodeRole);
     } else {
@@ -1097,7 +1108,7 @@ static void syncProcessBrokenLink(void *param) {
   SSyncPeer *pPeer = param;
   SSyncNode *pNode = pPeer->pSyncNode;
 
-  if (taosAcquireRef(tsSyncRefId, pNode->rid) < 0) return;
+  if (taosAcquireRef(tsSyncRefId, pNode->rid) == NULL) return;
   pthread_mutex_lock(&(pNode->mutex));
 
   sDebug("%s, TCP link is broken(%s)", pPeer->id, strerror(errno));
@@ -1209,13 +1220,17 @@ static int32_t syncForwardToPeerImpl(SSyncNode *pNode, void *data, void *mhandle
   int32_t    fwdLen;
   int32_t    code = 0;
 
-  if (nodeRole == TAOS_SYNC_ROLE_SLAVE && pWalHead->version != nodeVersion + 1) {
-    sError("vgId:%d, received ver:%" PRIu64 ", inconsistent with last ver:%" PRIu64 ", restart connection", pNode->vgId,
-           pWalHead->version, nodeVersion);
-    for (int32_t i = 0; i < pNode->replica; ++i) {
-      pPeer = pNode->peerInfo[i];
-      syncRestartConnection(pPeer);
+
+  if (pWalHead->version > nodeVersion + 1) {
+    sError("vgId:%d, hver:%" PRIu64 ", inconsistent with ver:%" PRIu64, pNode->vgId, pWalHead->version, nodeVersion);
+    if (nodeRole == TAOS_SYNC_ROLE_SLAVE) {
+      sInfo("vgId:%d, restart connection", pNode->vgId);
+      for (int32_t i = 0; i < pNode->replica; ++i) {
+        pPeer = pNode->peerInfo[i];
+        syncRestartConnection(pPeer);
+      }
     }
+
     return TSDB_CODE_SYN_INVALID_VERSION;
   }
 
diff --git a/src/tsdb/src/tsdbMain.c b/src/tsdb/src/tsdbMain.c
index 3bf5c830bd..94830e6070 100644
--- a/src/tsdb/src/tsdbMain.c
+++ b/src/tsdb/src/tsdbMain.c
@@ -279,6 +279,7 @@ STsdbCfg *tsdbGetCfg(const TSDB_REPO_T *repo) {
 int32_t tsdbConfigRepo(TSDB_REPO_T *repo, STsdbCfg *pCfg) {
   // TODO: think about multithread cases
   STsdbRepo *pRepo = (STsdbRepo *)repo;
+  STsdbCfg   config = pRepo->config;
   STsdbCfg * pRCfg = &pRepo->config;
 
   if (tsdbCheckAndSetDefaultCfg(pCfg) < 0) return -1;
@@ -293,22 +294,25 @@ int32_t tsdbConfigRepo(TSDB_REPO_T *repo, STsdbCfg *pCfg) {
   bool configChanged = false;
   if (pRCfg->compression != pCfg->compression) {
     tsdbAlterCompression(pRepo, pCfg->compression);
+    config.compression = pCfg->compression;
     configChanged = true;
   }
   if (pRCfg->keep != pCfg->keep) {
     if (tsdbAlterKeep(pRepo, pCfg->keep) < 0) {
       tsdbError("vgId:%d failed to configure repo when alter keep since %s", REPO_ID(pRepo), tstrerror(terrno));
+      config.keep = pCfg->keep;
       return -1;
     }
     configChanged = true;
   }
   if (pRCfg->totalBlocks != pCfg->totalBlocks) {
     tsdbAlterCacheTotalBlocks(pRepo, pCfg->totalBlocks);
+    config.totalBlocks = pCfg->totalBlocks;
     configChanged = true;
   }
 
   if (configChanged) {
-    if (tsdbSaveConfig(pRepo->rootDir, &pRepo->config) < 0) {
+    if (tsdbSaveConfig(pRepo->rootDir, &config) < 0) {
       tsdbError("vgId:%d failed to configure repository while save config since %s", REPO_ID(pRepo), tstrerror(terrno));
       return -1;
     }
diff --git a/src/util/tests/trefTest.c b/src/util/tests/trefTest.c
index 6887b24abd..454860410b 100644
--- a/src/util/tests/trefTest.c
+++ b/src/util/tests/trefTest.c
@@ -77,8 +77,8 @@ void *acquireRelease(void *param) {
     printf("a");
     
     id = random() % pSpace->refNum; 
-    code = taosAcquireRef(pSpace->rsetId, pSpace->p[id]);
-    if (code >= 0) {
+    void *p = taosAcquireRef(pSpace->rsetId, pSpace->p[id]);
+    if (p) {
       usleep(id % 5 + 1);
       taosReleaseRef(pSpace->rsetId, pSpace->p[id]);
     }