diff --git a/src/connector/go b/src/connector/go
index 8d7bf743852897110cbdcc7c4322cd7a74d4167b..050667e5b4d0eafa5387e4283e713559b421203f 160000
--- a/src/connector/go
+++ b/src/connector/go
@@ -1 +1 @@
-Subproject commit 8d7bf743852897110cbdcc7c4322cd7a74d4167b
+Subproject commit 050667e5b4d0eafa5387e4283e713559b421203f
diff --git a/src/dnode/src/dnodeVWrite.c b/src/dnode/src/dnodeVWrite.c
index e0345eb1f6f72c28a99b99546f2d0c2a96b8ed37..9d1d16e51e60ced5a07f3aa7d0a5a0f946771be2 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/taosdef.h b/src/inc/taosdef.h
index 1d5119dd05a0c6d0b5c31f9ef6733753da3c3f55..20c7af6a21d9a385d00fb3e52fe2a6ffd3d0729e 100644
--- a/src/inc/taosdef.h
+++ b/src/inc/taosdef.h
@@ -332,7 +332,7 @@ void tsDataSwap(void *pLeft, void *pRight, int32_t type, int32_t size, void* buf
 
 #define TSDB_MIN_DAYS_PER_FILE          1
 #define TSDB_MAX_DAYS_PER_FILE          3650 
-#define TSDB_DEFAULT_DAYS_PER_FILE      2 
+#define TSDB_DEFAULT_DAYS_PER_FILE      10
 
 #define TSDB_MIN_KEEP                   1        // data in db to be reserved.
 #define TSDB_MAX_KEEP                   365000   // data in db to be reserved.
diff --git a/src/inc/tsdb.h b/src/inc/tsdb.h
index 0cdb24a4da2bcb63b94f1d668eb79e8494704f03..a913deea3772437b76391f95d51509bf61a31754 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 12d977f32b224f9ce85db93fb4afc3d6f0e550f8..003ecd0d24498d51d5e82d041740aa6f0a180280 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 f1ce1d43aa01f5e903f220b472be0090ceaecae5..93739ca3d14a2895aedb3bbe37085c95ac722c96 100644
--- a/src/sync/src/syncMain.c
+++ b/src/sync/src/syncMain.c
@@ -352,7 +352,7 @@ void syncConfirmForward(int64_t rid, uint64_t version, int32_t code) {
     int32_t retLen = write(pPeer->peerFd, msg, msgLen);
 
     if (retLen == msgLen) {
-      sDebug("%s, forward-rsp is sent, ver:%" PRIu64, pPeer->id, version);
+      sDebug("%s, forward-rsp is sent, code:%x hver:%" PRIu64, pPeer->id, code, version);
     } else {
       sDebug("%s, failed to send forward ack, restart", pPeer->id);
       syncRestartConnection(pPeer);
@@ -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 {
@@ -831,7 +842,7 @@ static void syncProcessFwdResponse(char *cont, SSyncPeer *pPeer) {
   SSyncFwds *pSyncFwds = pNode->pSyncFwds;
   SFwdInfo * pFwdInfo;
 
-  sDebug("%s, forward-rsp is received, ver:%" PRIu64, pPeer->id, pFwdRsp->version);
+  sDebug("%s, forward-rsp is received, code:%x ver:%" PRIu64, pPeer->id, pFwdRsp->code, pFwdRsp->version);
   SFwdInfo *pFirst = pSyncFwds->fwdInfo + pSyncFwds->first;
 
   if (pFirst->version <= pFwdRsp->version && pSyncFwds->fwds > 0) {
@@ -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));
@@ -1125,10 +1136,9 @@ static void syncSaveFwdInfo(SSyncNode *pNode, uint64_t version, void *mhandle) {
   }
 
   SFwdInfo *pFwdInfo = pSyncFwds->fwdInfo + pSyncFwds->last;
+  memset(pFwdInfo, 0, sizeof(SFwdInfo));
   pFwdInfo->version = version;
   pFwdInfo->mhandle = mhandle;
-  pFwdInfo->acks = 0;
-  pFwdInfo->confirmed = 0;
   pFwdInfo->time = time;
 
   pSyncFwds->fwds++;
@@ -1210,13 +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 2ded3b668b47ac3dcf35fef287bae8f056977cb2..a18fa6d0efdaadc3429e7469065cd8a5ba417737 100644
--- a/src/tsdb/src/tsdbMain.c
+++ b/src/tsdb/src/tsdbMain.c
@@ -294,6 +294,7 @@ 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;
@@ -308,22 +309,25 @@ 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/tsdb/src/tsdbMemTable.c b/src/tsdb/src/tsdbMemTable.c
index 702f482471f8b35674bb9e04c8a44d54dcdb5f16..36b57a7dcd094f4aac3ce5d0bfe5dcbfc6dfad40 100644
--- a/src/tsdb/src/tsdbMemTable.c
+++ b/src/tsdb/src/tsdbMemTable.c
@@ -462,8 +462,8 @@ _exit:
   tdFreeDataCols(pDataCols);
   tsdbDestroyCommitIters(iters, pMem->maxTables);
   tsdbDestroyHelper(&whelper);
-  tsdbEndCommit(pRepo);
   tsdbInfo("vgId:%d commit over", pRepo->config.tsdbId);
+  tsdbEndCommit(pRepo);
 
   return NULL;
 }
diff --git a/src/util/tests/trefTest.c b/src/util/tests/trefTest.c
index 6887b24abdae9f5d9949fee0073a35eb717eb4f7..454860410b4dd0c3fdf65c4b7fd7950a1a7d4446 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]);
     }
diff --git a/src/vnode/src/vnodeMain.c b/src/vnode/src/vnodeMain.c
index 7813c5217b90c9de99fe14c8aef012c084d6af3c..021c392c5211f58d2c46ffb64807b6d434528969 100644
--- a/src/vnode/src/vnodeMain.c
+++ b/src/vnode/src/vnodeMain.c
@@ -637,9 +637,8 @@ static int vnodeResetTsdb(SVnodeObj *pVnode) {
   char rootDir[128] = "\0";
   sprintf(rootDir, "%s/tsdb", pVnode->rootDir);
 
-  if (atomic_val_compare_exchange_8(&pVnode->status, TAOS_VN_STATUS_READY, TAOS_VN_STATUS_RESET) !=
-      TAOS_VN_STATUS_READY) {
-    return -1;
+  if (pVnode->status != TAOS_VN_STATUS_CLOSING && pVnode->status != TAOS_VN_STATUS_INIT) {
+    pVnode->status = TAOS_VN_STATUS_RESET;
   }
 
   void *tsdb = pVnode->tsdb;
diff --git a/src/vnode/src/vnodeRead.c b/src/vnode/src/vnodeRead.c
index 9fa3a11c9c659b44a4edc12110969feb6779a8b7..4cc8819bcba07847cb3fa1b09f0663b6368b148b 100644
--- a/src/vnode/src/vnodeRead.c
+++ b/src/vnode/src/vnodeRead.c
@@ -56,19 +56,19 @@ int32_t vnodeProcessRead(void *param, SVReadMsg *pRead) {
 static int32_t vnodeCheckRead(void *param) {
   SVnodeObj *pVnode = param;
   if (pVnode->status != TAOS_VN_STATUS_READY) {
-    vDebug("vgId:%d, vnode status is %s, recCount:%d pVnode:%p", pVnode->vgId, vnodeStatus[pVnode->status],
+    vDebug("vgId:%d, vnode status is %s, refCount:%d pVnode:%p", pVnode->vgId, vnodeStatus[pVnode->status],
            pVnode->refCount, pVnode);
     return TSDB_CODE_APP_NOT_READY;
   }
 
   // tsdb may be in reset state
   if (pVnode->tsdb == NULL) {
-    vDebug("vgId:%d, tsdb is null, recCount:%d pVnode:%p", pVnode->vgId, pVnode->refCount, pVnode);
+    vDebug("vgId:%d, tsdb is null, refCount:%d pVnode:%p", pVnode->vgId, pVnode->refCount, pVnode);
     return TSDB_CODE_APP_NOT_READY;
   }
 
   if (pVnode->role != TAOS_SYNC_ROLE_SLAVE && pVnode->role != TAOS_SYNC_ROLE_MASTER) {
-    vDebug("vgId:%d, replica:%d role:%s, recCount:%d pVnode:%p", pVnode->vgId, pVnode->syncCfg.replica,
+    vDebug("vgId:%d, replica:%d role:%s, refCount:%d pVnode:%p", pVnode->vgId, pVnode->syncCfg.replica,
            syncRole[pVnode->role], pVnode->refCount, pVnode);
     return TSDB_CODE_APP_NOT_READY;
   }
diff --git a/src/vnode/src/vnodeWrite.c b/src/vnode/src/vnodeWrite.c
index e67c544fb23456d8775077e8a86f1745508bd0fc..80da91602b13c4677020196532524188f34e0617 100644
--- a/src/vnode/src/vnodeWrite.c
+++ b/src/vnode/src/vnodeWrite.c
@@ -103,18 +103,18 @@ int32_t vnodeProcessWrite(void *vparam, void *wparam, int32_t qtype, void *rpara
 static int32_t vnodeCheckWrite(void *param) {
   SVnodeObj *pVnode = param;
   if (!(pVnode->accessState & TSDB_VN_WRITE_ACCCESS)) {
-    vDebug("vgId:%d, no write auth, recCount:%d pVnode:%p", pVnode->vgId, pVnode->refCount, pVnode);
+    vDebug("vgId:%d, no write auth, refCount:%d pVnode:%p", pVnode->vgId, pVnode->refCount, pVnode);
     return TSDB_CODE_VND_NO_WRITE_AUTH;
   }
 
   // tsdb may be in reset state
   if (pVnode->tsdb == NULL) {
-    vDebug("vgId:%d, tsdb is null, recCount:%d pVnode:%p", pVnode->vgId, pVnode->refCount, pVnode);
+    vDebug("vgId:%d, tsdb is null, refCount:%d pVnode:%p", pVnode->vgId, pVnode->refCount, pVnode);
     return TSDB_CODE_APP_NOT_READY;
   }
 
   if (pVnode->status == TAOS_VN_STATUS_CLOSING) {
-    vDebug("vgId:%d, vnode status is %s, recCount:%d pVnode:%p", pVnode->vgId, vnodeStatus[pVnode->status],
+    vDebug("vgId:%d, vnode status is %s, refCount:%d pVnode:%p", pVnode->vgId, vnodeStatus[pVnode->status],
            pVnode->refCount, pVnode);
     return TSDB_CODE_APP_NOT_READY;
   }
diff --git a/tests/examples/JDBC/connectionPools/pom.xml b/tests/examples/JDBC/connectionPools/pom.xml
index d117c59637b00ebc1894e533fc8fd6a4f99d203f..2793f0a83ddc88711796c133802c82979ae14be5 100644
--- a/tests/examples/JDBC/connectionPools/pom.xml
+++ b/tests/examples/JDBC/connectionPools/pom.xml
@@ -42,7 +42,7 @@
         <dependency>
             <groupId>com.mchange</groupId>
             <artifactId>c3p0</artifactId>
-            <version>0.9.5.2</version>
+            <version>0.9.5.4</version>
         </dependency>
 
         <!-- log4j -->