diff --git a/src/sync/src/syncMain.c b/src/sync/src/syncMain.c
index eaa073348a90ad4e3bb9469dc0705475aa981ae8..8e7f18dc3b5cc4711808346a46118f77b196887d 100644
--- a/src/sync/src/syncMain.c
+++ b/src/sync/src/syncMain.c
@@ -108,8 +108,7 @@ static void syncModuleInitFunc() {
   tstrncpy(tsNodeFqdn, tsLocalFqdn, sizeof(tsNodeFqdn));
 }
 
-void *syncStart(const SSyncInfo *pInfo) 
-{
+void *syncStart(const SSyncInfo *pInfo) {
   const SSyncCfg *pCfg = &pInfo->syncCfg;
 
   SSyncNode *pNode = (SSyncNode *) calloc(sizeof(SSyncNode), 1);
@@ -189,9 +188,8 @@ void *syncStart(const SSyncInfo *pInfo)
   return pNode;
 }
 
-void syncStop(void *param) 
-{
-  SSyncNode  *pNode = param;
+void syncStop(void *param) {
+  SSyncNode * pNode = param;
   SSyncPeer  *pPeer;
 
   if (pNode == NULL) return;
@@ -215,9 +213,8 @@ void syncStop(void *param)
   syncDecNodeRef(pNode);
 }
 
-int32_t syncReconfig(void *param, const SSyncCfg *pNewCfg) 
-{
-  SSyncNode  *pNode = param;
+int32_t syncReconfig(void *param, const SSyncCfg *pNewCfg) {
+  SSyncNode * pNode = param;
   int         i, j;
 
   if (pNode == NULL) return TSDB_CODE_SYN_INVALID_CONFIG;
@@ -283,10 +280,9 @@ int32_t syncReconfig(void *param, const SSyncCfg *pNewCfg)
   return 0;
 }
 
-int32_t syncForwardToPeer(void *param, void *data, void *mhandle, int qtype)
-{
-  SSyncNode  *pNode = param;
-  SSyncPeer  *pPeer;
+int32_t syncForwardToPeer(void *param, void *data, void *mhandle, int qtype) {
+  SSyncNode * pNode = param;
+  SSyncPeer * pPeer;
   SSyncHead  *pSyncHead;
   SWalHead   *pWalHead = data;
   int         fwdLen;
@@ -334,9 +330,8 @@ int32_t syncForwardToPeer(void *param, void *data, void *mhandle, int qtype)
   return code;
 }
 
-void syncConfirmForward(void *param, uint64_t version, int32_t code)
-{
-  SSyncNode  *pNode = param;
+void syncConfirmForward(void *param, uint64_t version, int32_t code) {
+  SSyncNode *pNode = param;
   if (pNode == NULL) return;
   if (pNode->quorum <= 1) return;
 
@@ -387,10 +382,9 @@ void syncRecover(void *param) {
   pthread_mutex_unlock(&(pNode->mutex));
 }
 
-int syncGetNodesRole(void *param, SNodesRole *pNodesRole)
-{
+int syncGetNodesRole(void *param, SNodesRole *pNodesRole) {
   SSyncNode *pNode = param;
-  
+
   pNodesRole->selfIndex = pNode->selfIndex;
   for (int i=0; i<pNode->replica; ++i) {
     pNodesRole->nodeId[i] = pNode->peerInfo[i]->nodeId;
@@ -400,8 +394,7 @@ int syncGetNodesRole(void *param, SNodesRole *pNodesRole)
   return 0;
 }
 
-static void syncAddArbitrator(SSyncNode *pNode)
-{
+static void syncAddArbitrator(SSyncNode *pNode) {
   SSyncPeer *pPeer = pNode->peerInfo[TAOS_SYNC_MAX_REPLICA];
 
   // if not configured, return right away
@@ -454,13 +447,11 @@ static void syncDecNodeRef(SSyncNode *pNode)
   }
 }
 
-void syncAddPeerRef(SSyncPeer *pPeer)
-{
+void syncAddPeerRef(SSyncPeer *pPeer) {
    atomic_add_fetch_8(&pPeer->refCount, 1);
 }
 
-int syncDecPeerRef(SSyncPeer *pPeer)
-{
+int syncDecPeerRef(SSyncPeer *pPeer) {
   if (atomic_sub_fetch_8(&pPeer->refCount, 1) == 0) {
     syncDecNodeRef(pPeer->pSyncNode);
 
@@ -473,18 +464,16 @@ int syncDecPeerRef(SSyncPeer *pPeer)
   return 1;
 }
 
-static void syncClosePeerConn(SSyncPeer *pPeer) 
-{
+static void syncClosePeerConn(SSyncPeer *pPeer) {
   taosTmrStopA(&pPeer->timer);
   taosClose(pPeer->syncFd);
-  if (pPeer->peerFd >=0) {
+  if (pPeer->peerFd >= 0) {
     pPeer->peerFd = -1;
     taosFreeTcpConn(pPeer->pConn);
   }
 }
 
-static void syncRemovePeer(SSyncPeer *pPeer)
-{
+static void syncRemovePeer(SSyncPeer *pPeer) {
   sInfo("%s, it is removed", pPeer->id);
 
   pPeer->ip = 0;
@@ -492,8 +481,7 @@ static void syncRemovePeer(SSyncPeer *pPeer)
   syncDecPeerRef(pPeer);
 }
 
-static SSyncPeer *syncAddPeer(SSyncNode *pNode, const SNodeInfo *pInfo) 
-{
+static SSyncPeer *syncAddPeer(SSyncNode *pNode, const SNodeInfo *pInfo) {
   uint32_t ip = taosGetIpFromFqdn(pInfo->nodeFqdn);
   if (ip == -1) return NULL;
  
@@ -523,25 +511,24 @@ static SSyncPeer *syncAddPeer(SSyncNode *pNode, const SNodeInfo *pInfo)
   return pPeer;
 }
 
-void syncBroadcastStatus(SSyncNode *pNode)
-{
+void syncBroadcastStatus(SSyncNode *pNode) {
   SSyncPeer *pPeer;
 
   for (int i = 0; i < pNode->replica; ++i) {
-    if ( i == pNode->selfIndex ) continue;
+    if (i == pNode->selfIndex) continue;
     pPeer = pNode->peerInfo[i];
     syncSendPeersStatusMsgToPeer(pPeer, 1);
   }
-} 
+}
 
 static void syncResetFlowCtrl(SSyncNode *pNode) {
-
   for (int i = 0; i < pNode->replica; ++i) {
     pNode->peerInfo[i]->numOfRetrieves = 0;
   }
 
-  if (pNode->notifyFlowCtrl)
-    (*pNode->notifyFlowCtrl)(pNode->ahandle, 0);   
+  if (pNode->notifyFlowCtrl) {
+    (*pNode->notifyFlowCtrl)(pNode->ahandle, 0);
+  }
 }
 
 static void syncChooseMaster(SSyncNode *pNode) {
@@ -598,9 +585,9 @@ static void syncChooseMaster(SSyncNode *pNode) {
   } else {
     sDebug("vgId:%d, failed to choose master", pNode->vgId);
   }
-} 
- 
-static SSyncPeer *syncCheckMaster(SSyncNode *pNode ) {
+}
+
+static SSyncPeer *syncCheckMaster(SSyncNode *pNode) {
   int onlineNum = 0;
   int index = -1;
   int replica = pNode->replica;
@@ -617,7 +604,7 @@ static SSyncPeer *syncCheckMaster(SSyncNode *pNode ) {
     replica = pNode->replica + 1;
   }
 
-  if (onlineNum <= replica*0.5) {
+  if (onlineNum <= replica * 0.5) {
     if (nodeRole != TAOS_SYNC_ROLE_UNSYNCED) {
       nodeRole = TAOS_SYNC_ROLE_UNSYNCED;
       pNode->peerInfo[pNode->selfIndex]->role = nodeRole;
@@ -625,13 +612,13 @@ static SSyncPeer *syncCheckMaster(SSyncNode *pNode ) {
       sInfo("vgId:%d, change to unsynced state, online:%d replica:%d", pNode->vgId, onlineNum, replica);
     }
   } else {
-    for (int i=0; i<pNode->replica; ++i) {
+    for (int i = 0; i < pNode->replica; ++i) {
       SSyncPeer *pTemp = pNode->peerInfo[i];
-      if ( pTemp->role != TAOS_SYNC_ROLE_MASTER ) continue;
-      if ( index < 0 ) {
+      if (pTemp->role != TAOS_SYNC_ROLE_MASTER) continue;
+      if (index < 0) {
         index = i;
-      } else { // multiple masters, it shall not happen 
-        if ( i == pNode->selfIndex ) {
+      } else {  // multiple masters, it shall not happen
+        if (i == pNode->selfIndex) {
           sError("%s, peer is master, work as slave instead", pTemp->id);
           nodeRole = TAOS_SYNC_ROLE_SLAVE;
           (*pNode->notifyRole)(pNode->ahandle, nodeRole);
@@ -640,7 +627,7 @@ static SSyncPeer *syncCheckMaster(SSyncNode *pNode ) {
     }
   }
 
-  SSyncPeer *pMaster = (index>=0) ? pNode->peerInfo[index]:NULL;
+  SSyncPeer *pMaster = (index >= 0) ? pNode->peerInfo[index] : NULL;
   return pMaster;
 }
 
@@ -649,7 +636,7 @@ static int syncValidateMaster(SSyncPeer *pPeer) {
   int code = 0;
 
   if (nodeRole == TAOS_SYNC_ROLE_MASTER && nodeVersion < pPeer->version) {
-    sDebug("%s, slave has higher version, restart all connections!!!",  pPeer->id);
+    sDebug("%s, slave has higher version, restart all connections!!!", pPeer->id);
     nodeRole = TAOS_SYNC_ROLE_UNSYNCED;
     (*pNode->notifyRole)(pNode->ahandle, nodeRole);
     code = -1;
@@ -658,13 +645,12 @@ static int syncValidateMaster(SSyncPeer *pPeer) {
       if ( i == pNode->selfIndex ) continue;
       syncRestartPeer(pNode->peerInfo[i]);
     }
-  } 
+  }
 
   return code;
 }
 
-static void syncCheckRole(SSyncPeer *pPeer, SPeerStatus peersStatus[], int8_t newRole)
-{
+static void syncCheckRole(SSyncPeer *pPeer, SPeerStatus peersStatus[], int8_t newRole) {
   SSyncNode *pNode = pPeer->pSyncNode;
   int8_t     peerOldRole = pPeer->role;
   int8_t     selfOldRole = nodeRole;
@@ -686,14 +672,14 @@ static void syncCheckRole(SSyncPeer *pPeer, SPeerStatus peersStatus[], int8_t ne
     if (syncValidateMaster(pPeer) < 0) return;
 
     if (nodeRole == TAOS_SYNC_ROLE_UNSYNCED) {
-      if ( nodeVersion < pMaster->version) {
+      if (nodeVersion < pMaster->version) {
         syncRequired = 1;
       } else {
         sInfo("%s is master, work as slave, ver:%" PRIu64, pMaster->id, pMaster->version);
         nodeRole = TAOS_SYNC_ROLE_SLAVE;
         (*pNode->notifyRole)(pNode->ahandle, nodeRole);
       }
-    } else if ( nodeRole == TAOS_SYNC_ROLE_SLAVE && pMaster == pPeer) {
+    } else if (nodeRole == TAOS_SYNC_ROLE_SLAVE && pMaster == pPeer) {
       // nodeVersion = pMaster->version;
     }
   } else {
@@ -734,20 +720,18 @@ static void syncRestartPeer(SSyncPeer *pPeer) {
   pPeer->sstatus = TAOS_SYNC_STATUS_INIT;
 
   int ret = strcmp(pPeer->fqdn, tsNodeFqdn);
-  if (ret > 0 || (ret == 0 && pPeer->port > tsSyncPort) )
-    taosTmrReset(syncCheckPeerConnection, tsSyncTimer*1000, pPeer, syncTmrCtrl, &pPeer->timer);
+  if (ret > 0 || (ret == 0 && pPeer->port > tsSyncPort))
+    taosTmrReset(syncCheckPeerConnection, tsSyncTimer * 1000, pPeer, syncTmrCtrl, &pPeer->timer);
 }
 
-void syncRestartConnection(SSyncPeer *pPeer)
-{
+void syncRestartConnection(SSyncPeer *pPeer) {
   if (pPeer->ip == 0) return;
 
   syncRestartPeer(pPeer);
   syncCheckRole(pPeer, NULL, TAOS_SYNC_ROLE_OFFLINE);
 }
 
-static void syncProcessSyncRequest(char *msg, SSyncPeer *pPeer)
-{
+static void syncProcessSyncRequest(char *msg, SSyncPeer *pPeer) {
   SSyncNode *pNode = pPeer->pSyncNode;
   sDebug("%s, sync-req is received", pPeer->id);
 
@@ -782,8 +766,7 @@ static void syncProcessSyncRequest(char *msg, SSyncPeer *pPeer)
   }
 }
 
-static void syncNotStarted(void *param, void *tmrId)
-{
+static void syncNotStarted(void *param, void *tmrId) {
   SSyncPeer *pPeer = param;
   SSyncNode *pNode = pPeer->pSyncNode;
 
@@ -803,14 +786,13 @@ static void syncTryRecoverFromMaster(void *param, void *tmrId) {
   pthread_mutex_unlock(&(pNode->mutex));
 }
 
-static void syncRecoverFromMaster(SSyncPeer *pPeer)
-{
-  SSyncNode   *pNode = pPeer->pSyncNode;
+static void syncRecoverFromMaster(SSyncPeer *pPeer) {
+  SSyncNode *pNode = pPeer->pSyncNode;
 
-  if ( nodeSStatus != TAOS_SYNC_STATUS_INIT) {
+  if (nodeSStatus != TAOS_SYNC_STATUS_INIT) {
     sDebug("%s, sync is already started, status:%d", pPeer->id, nodeSStatus);
     return;
-  } 
+  }
 
   taosTmrStopA(&pPeer->timer);
   if (tsSyncNum >= tsMaxSyncNum) {
@@ -840,9 +822,8 @@ static void syncRecoverFromMaster(SSyncPeer *pPeer)
   return;
 }
 
-static void syncProcessFwdResponse(char *cont, SSyncPeer *pPeer) 
-{
-  SSyncNode  *pNode = pPeer->pSyncNode;
+static void syncProcessFwdResponse(char *cont, SSyncPeer *pPeer) {
+  SSyncNode * pNode = pPeer->pSyncNode;
   SFwdRsp    *pFwdRsp = (SFwdRsp *) cont;
   SSyncFwds  *pSyncFwds = pNode->pSyncFwds;
   SFwdInfo   *pFwdInfo;
@@ -862,10 +843,8 @@ static void syncProcessFwdResponse(char *cont, SSyncPeer *pPeer)
   }
 }
 
-
-static void syncProcessForwardFromPeer(char *cont, SSyncPeer *pPeer)
-{
-  SSyncNode   *pNode = pPeer->pSyncNode;
+static void syncProcessForwardFromPeer(char *cont, SSyncPeer *pPeer) {
+  SSyncNode *  pNode = pPeer->pSyncNode;
   SWalHead    *pHead = (SWalHead *)cont;
 
   sDebug("%s, forward is received, ver:%" PRIu64, pPeer->id, pHead->version);
@@ -884,9 +863,8 @@ static void syncProcessForwardFromPeer(char *cont, SSyncPeer *pPeer)
   return;
 }
 
-static void syncProcessPeersStatusMsg(char *cont, SSyncPeer *pPeer)
-{
-  SSyncNode    *pNode = pPeer->pSyncNode;
+static void syncProcessPeersStatusMsg(char *cont, SSyncPeer *pPeer) {
+  SSyncNode *   pNode = pPeer->pSyncNode;
   SPeersStatus *pPeersStatus = (SPeersStatus *)cont;
 
   sDebug("%s, status msg received, self:%s ver:%" PRIu64 " peer:%s ver:%" PRIu64 ", ack:%d", pPeer->id,
@@ -909,10 +887,10 @@ static int syncReadPeerMsg(SSyncPeer *pPeer, SSyncHead *pHead, char *cont) {
   }
 
   // head.len = htonl(head.len);
-  if (pHead->len <0) {
+  if (pHead->len < 0) {
     sError("%s, invalid pkt length, len:%d", pPeer->id, pHead->len);
     return -1;
-  } 
+  }
 
   int bytes = taosReadMsg(pPeer->peerFd, cont, pHead->len);
   if (bytes != pHead->len) {
@@ -923,9 +901,8 @@ static int syncReadPeerMsg(SSyncPeer *pPeer, SSyncHead *pHead, char *cont) {
   return 0;
 }
 
-static int syncProcessPeerMsg(void *param, void *buffer)
-{
-  SSyncPeer  *pPeer = param;
+static int syncProcessPeerMsg(void *param, void *buffer) {
+  SSyncPeer * pPeer = param;
   SSyncHead   head;
   char       *cont = (char *)buffer;
 
@@ -953,8 +930,7 @@ static int syncProcessPeerMsg(void *param, void *buffer)
 
 #define statusMsgLen sizeof(SSyncHead)+sizeof(SPeersStatus)+sizeof(SPeerStatus)*TAOS_SYNC_MAX_REPLICA
 
-static void syncSendPeersStatusMsgToPeer(SSyncPeer *pPeer, char ack)
-{
+static void syncSendPeersStatusMsgToPeer(SSyncPeer *pPeer, char ack) {
   SSyncNode *pNode = pPeer->pSyncNode;
   char       msg[statusMsgLen] = {0};
 
@@ -1011,7 +987,7 @@ static void syncSetupPeerConnection(SSyncPeer *pPeer) {
   firstPkt.port = tsSyncPort;
   firstPkt.sourceId = pNode->vgId;  // tell arbitrator its vgId
 
-  if ( write(connFd, &firstPkt, sizeof(firstPkt)) == sizeof(firstPkt)) {
+  if (write(connFd, &firstPkt, sizeof(firstPkt)) == sizeof(firstPkt)) {
     sDebug("%s, connection to peer server is setup", pPeer->id);
     pPeer->peerFd = connFd; 
     pPeer->role = TAOS_SYNC_ROLE_UNSYNCED;
@@ -1024,8 +1000,7 @@ static void syncSetupPeerConnection(SSyncPeer *pPeer) {
   }
 }
 
-static void syncCheckPeerConnection(void *param, void *tmrId) 
-{
+static void syncCheckPeerConnection(void *param, void *tmrId) {
   SSyncPeer *pPeer = param;
   SSyncNode *pNode = pPeer->pSyncNode;
 
@@ -1037,8 +1012,7 @@ static void syncCheckPeerConnection(void *param, void *tmrId)
   pthread_mutex_unlock(&(pNode->mutex));
 }
 
-static void syncCreateRestoreDataThread(SSyncPeer *pPeer) 
-{
+static void syncCreateRestoreDataThread(SSyncPeer *pPeer) {
   taosTmrStopA(&pPeer->timer);
 
   pthread_attr_t thattr;
@@ -1059,8 +1033,7 @@ static void syncCreateRestoreDataThread(SSyncPeer *pPeer)
   }
 }
 
-static void syncProcessIncommingConnection(int connFd, uint32_t sourceIp) 
-{
+static void syncProcessIncommingConnection(int connFd, uint32_t sourceIp) {
   char  ipstr[24];
   int   i;
    
@@ -1137,8 +1110,7 @@ static void syncProcessBrokenLink(void *param) {
   syncDecNodeRef(pNode);
 }
 
-static void syncSaveFwdInfo(SSyncNode *pNode, uint64_t version, void *mhandle) 
-{
+static void syncSaveFwdInfo(SSyncNode *pNode, uint64_t version, void *mhandle) {
   SSyncFwds *pSyncFwds = pNode->pSyncFwds;
   uint64_t   time = taosGetTimestampMs();
 
@@ -1160,8 +1132,7 @@ static void syncSaveFwdInfo(SSyncNode *pNode, uint64_t version, void *mhandle)
   sDebug("vgId:%d, fwd info is saved, ver:%" PRIu64 " fwds:%d ", pNode->vgId, version, pSyncFwds->fwds);
 }
 
-static void syncRemoveConfirmedFwdInfo(SSyncNode *pNode)
-{
+static void syncRemoveConfirmedFwdInfo(SSyncNode *pNode) {
   SSyncFwds *pSyncFwds = pNode->pSyncFwds;
 
   int fwds = pSyncFwds->fwds;
@@ -1178,8 +1149,7 @@ static void syncRemoveConfirmedFwdInfo(SSyncNode *pNode)
   }
 }
 
-static void syncProcessFwdAck(SSyncNode *pNode, SFwdInfo *pFwdInfo, int32_t code) 
-{
+static void syncProcessFwdAck(SSyncNode *pNode, SFwdInfo *pFwdInfo, int32_t code) {
   int confirm = 0;
   if (pFwdInfo->code == 0) pFwdInfo->code = code;
 
@@ -1200,8 +1170,7 @@ static void syncProcessFwdAck(SSyncNode *pNode, SFwdInfo *pFwdInfo, int32_t code
   }
 }
 
-static void syncMonitorFwdInfos(void *param, void *tmrId)
-{
+static void syncMonitorFwdInfos(void *param, void *tmrId) {
   SSyncNode *pNode = param;
   SSyncFwds *pSyncFwds = pNode->pSyncFwds;
   uint64_t   time = taosGetTimestampMs();
@@ -1220,6 +1189,3 @@ static void syncMonitorFwdInfos(void *param, void *tmrId)
   
   pNode->pFwdTimer = taosTmrStart(syncMonitorFwdInfos, 300, pNode, syncTmrCtrl);
 }
- 
-
-
diff --git a/src/sync/src/syncRestore.c b/src/sync/src/syncRestore.c
index 5c9b7343655645b60ff872205c954059c7aa9b4a..2a0bee3726d939cc9da436af36ce02d45dad34d5 100644
--- a/src/sync/src/syncRestore.c
+++ b/src/sync/src/syncRestore.c
@@ -48,8 +48,7 @@ static void syncRemoveExtraFile(SSyncPeer *pPeer, uint32_t sindex, uint32_t eind
   }        
 }
 
-static int syncRestoreFile(SSyncPeer *pPeer, uint64_t *fversion) 
-{
+static int syncRestoreFile(SSyncPeer *pPeer, uint64_t *fversion) {
   SSyncNode *pNode = pPeer->pSyncNode;
   SFileInfo  minfo; memset(&minfo, 0, sizeof(minfo)); /* = {0}; */  // master file info
   SFileInfo  sinfo; memset(&sinfo, 0, sizeof(sinfo)); /* = {0}; */  // slave file info
@@ -130,8 +129,7 @@ static int syncRestoreFile(SSyncPeer *pPeer, uint64_t *fversion)
   return code;
 }
 
-static int syncRestoreWal(SSyncPeer *pPeer)
-{
+static int syncRestoreWal(SSyncPeer *pPeer) {
   SSyncNode  *pNode = pPeer->pSyncNode;
   int         ret, code = -1;
 
@@ -172,8 +170,7 @@ static char *syncProcessOneBufferedFwd(SSyncPeer *pPeer, char *offset)
   return offset;
 }
 
-static int syncProcessBufferedFwd(SSyncPeer *pPeer)
-{
+static int syncProcessBufferedFwd(SSyncPeer *pPeer) {
   SSyncNode   *pNode = pPeer->pSyncNode;
   SRecvBuffer *pRecv = pNode->pRecv;
   int          forwards = 0;
@@ -201,8 +198,7 @@ static int syncProcessBufferedFwd(SSyncPeer *pPeer)
   return pRecv->code;
 }
 
-int syncSaveIntoBuffer(SSyncPeer *pPeer, SWalHead *pHead)
-{ 
+int syncSaveIntoBuffer(SSyncPeer *pPeer, SWalHead *pHead) {
   SSyncNode   *pNode = pPeer->pSyncNode;
   SRecvBuffer *pRecv = pNode->pRecv;
 
@@ -222,8 +218,7 @@ int syncSaveIntoBuffer(SSyncPeer *pPeer, SWalHead *pHead)
   return pRecv->code;
 }
 
-static void syncCloseRecvBuffer(SSyncNode *pNode)
-{
+static void syncCloseRecvBuffer(SSyncNode *pNode) {
   if (pNode->pRecv) {
     taosTFree(pNode->pRecv->buffer);
   }
@@ -231,8 +226,7 @@ static void syncCloseRecvBuffer(SSyncNode *pNode)
   taosTFree(pNode->pRecv);
 }
 
-static int syncOpenRecvBuffer(SSyncNode *pNode) 
-{
+static int syncOpenRecvBuffer(SSyncNode *pNode) {
   syncCloseRecvBuffer(pNode);
 
   SRecvBuffer *pRecv = calloc(sizeof(SRecvBuffer), 1);
@@ -253,8 +247,7 @@ static int syncOpenRecvBuffer(SSyncNode *pNode)
   return 0;
 }
 
-static int syncRestoreDataStepByStep(SSyncPeer *pPeer)
-{
+static int syncRestoreDataStepByStep(SSyncPeer *pPeer) {
   SSyncNode *pNode = pPeer->pSyncNode;
   nodeSStatus = TAOS_SYNC_STATUS_FILE;
   uint64_t fversion = 0;
@@ -292,10 +285,9 @@ static int syncRestoreDataStepByStep(SSyncPeer *pPeer)
   return 0;
 }
 
-void *syncRestoreData(void *param)
-{
-  SSyncPeer  *pPeer = (SSyncPeer *)param;
-  SSyncNode  *pNode = pPeer->pSyncNode;
+void *syncRestoreData(void *param) {
+  SSyncPeer *pPeer = (SSyncPeer *)param;
+  SSyncNode *pNode = pPeer->pSyncNode;
 
   taosBlockSIGPIPE();
   __sync_fetch_and_add(&tsSyncNum, 1);
@@ -326,4 +318,3 @@ void *syncRestoreData(void *param)
 
   return NULL;
 }
-
diff --git a/src/sync/src/syncRetrieve.c b/src/sync/src/syncRetrieve.c
index 0cc3e7326a57accb8ce589a9dd95e6478648a2eb..8aa317b1ac7c770b6b102545716656541b8bb67e 100644
--- a/src/sync/src/syncRetrieve.c
+++ b/src/sync/src/syncRetrieve.c
@@ -27,11 +27,10 @@
 #include "tsync.h"
 #include "syncInt.h"
 
-static int syncAddIntoWatchList(SSyncPeer *pPeer, char *name) 
-{
+static int syncAddIntoWatchList(SSyncPeer *pPeer, char *name) {
   sDebug("%s, start to monitor:%s", pPeer->id, name);
 
-  if (pPeer->notifyFd <=0) {
+  if (pPeer->notifyFd <= 0) {
     pPeer->watchNum = 0;
     pPeer->notifyFd = inotify_init1(IN_NONBLOCK);
     if (pPeer->notifyFd < 0) {
@@ -70,9 +69,8 @@ static int syncAddIntoWatchList(SSyncPeer *pPeer, char *name)
   return 0;
 }
 
-static int syncAreFilesModified(SSyncPeer *pPeer) 
-{
-  if (pPeer->notifyFd <=0) return 0;
+static int syncAreFilesModified(SSyncPeer *pPeer) {
+  if (pPeer->notifyFd <= 0) return 0;
 
   char buf[2048]; 
   int len = read(pPeer->notifyFd, buf, sizeof(buf));
@@ -96,12 +94,11 @@ static int syncAreFilesModified(SSyncPeer *pPeer)
     }
   }
 
-  return code;  
+  return code;
 }
 
-static int syncRetrieveFile(SSyncPeer *pPeer)
-{
-  SSyncNode  *pNode = pPeer->pSyncNode;
+static int syncRetrieveFile(SSyncPeer *pPeer) {
+  SSyncNode * pNode = pPeer->pSyncNode;
   SFileInfo   fileInfo;
   SFileAck    fileAck;
   int         code = -1;
@@ -128,7 +125,7 @@ static int syncRetrieveFile(SSyncPeer *pPeer)
 
     // wait for the ack from peer
     ret = taosReadMsg(pPeer->syncFd, &(fileAck), sizeof(fileAck));
-    if (ret <0)  break;
+    if (ret < 0) break;
 
     // set the peer sync version
     pPeer->sversion = fileInfo.fversion;
@@ -148,11 +145,11 @@ static int syncRetrieveFile(SSyncPeer *pPeer)
 
     // send the file to peer
     int sfd = open(name, O_RDONLY);
-    if ( sfd < 0 ) break;
+    if (sfd < 0) break;
 
     ret = taosTSendFile(pPeer->syncFd, sfd, NULL, fileInfo.size); 
-    close(sfd); 
-    if (ret <0) break;
+    close(sfd);
+    if (ret < 0) break;
 
     sDebug("%s, %s is sent, size:%" PRId64, pPeer->id, name, fileInfo.size);    
     fileInfo.index++; 
@@ -170,8 +167,7 @@ static int syncRetrieveFile(SSyncPeer *pPeer)
 
 /* if only a partial record is read out, set the IN_MODIFY flag in event,
    so upper layer will reload the file to get a complete record */
-static int syncReadOneWalRecord(int sfd, SWalHead *pHead, uint32_t *pEvent) 
-{ 
+static int syncReadOneWalRecord(int sfd, SWalHead *pHead, uint32_t *pEvent) {
   int ret;
 
   ret = read(sfd, pHead, sizeof(SWalHead));
@@ -185,7 +181,7 @@ static int syncReadOneWalRecord(int sfd, SWalHead *pHead, uint32_t *pEvent)
   }
 
   ret = read(sfd, pHead->cont, pHead->len);
-  if (ret <0) return -1;
+  if (ret < 0) return -1;
 
   if (ret != pHead->len) {
     // file is not at end yet, it shall be reloaded
@@ -194,10 +190,9 @@ static int syncReadOneWalRecord(int sfd, SWalHead *pHead, uint32_t *pEvent)
   }
 
   return sizeof(SWalHead) + pHead->len;
-}    
+}
 
-static int syncMonitorLastWal(SSyncPeer *pPeer, char *name) 
-{ 
+static int syncMonitorLastWal(SSyncPeer *pPeer, char *name) {
   pPeer->watchNum = 0;
   taosClose(pPeer->notifyFd);
   pPeer->notifyFd = inotify_init1(IN_NONBLOCK);
@@ -221,18 +216,17 @@ static int syncMonitorLastWal(SSyncPeer *pPeer, char *name)
     return -1;
   }
 
-  return 0; 
+  return 0;
 }
 
-static uint32_t syncCheckLastWalChanges(SSyncPeer *pPeer, uint32_t *pEvent) 
-{
+static uint32_t syncCheckLastWalChanges(SSyncPeer *pPeer, uint32_t *pEvent) {
   char       buf[2048]; 
   int  len = read(pPeer->notifyFd, buf, sizeof(buf));
-  if (len <0 && errno != EAGAIN) {
-    sError("%s, failed to read notify FD(%s)", pPeer->id, strerror(errno));    
+  if (len < 0 && errno != EAGAIN) {
+    sError("%s, failed to read notify FD(%s)", pPeer->id, strerror(errno));
     return -1;
   }
-    
+
   if (len == 0) return 0;
 
   struct inotify_event *event;
@@ -248,8 +242,7 @@ static uint32_t syncCheckLastWalChanges(SSyncPeer *pPeer, uint32_t *pEvent)
   return 0;
 }
 
-static int syncRetrieveLastWal(SSyncPeer *pPeer, char *name, uint64_t fversion, int64_t offset, uint32_t *pEvent) 
-{
+static int syncRetrieveLastWal(SSyncPeer *pPeer, char *name, uint64_t fversion, int64_t offset, uint32_t *pEvent) {
   SWalHead  *pHead = (SWalHead *) malloc(640000);
   int        code = -1;
   int32_t    bytes = 0;
@@ -261,9 +254,12 @@ static int syncRetrieveLastWal(SSyncPeer *pPeer, char *name, uint64_t fversion,
   sDebug("%s, retrieve last wal, offset:%" PRId64 " fversion:%" PRIu64, pPeer->id, offset, fversion);
 
   while (1) {
-    int wsize = syncReadOneWalRecord(sfd, pHead, pEvent); 
-    if (wsize <0) break;
-    if (wsize == 0) { code = 0; break; }
+    int wsize = syncReadOneWalRecord(sfd, pHead, pEvent);
+    if (wsize < 0) break;
+    if (wsize == 0) {
+      code = 0;
+      break;
+    }
 
     sDebug("%s, last wal is forwarded, ver:%" PRIu64, pPeer->id, pHead->version);
     int ret = taosWriteMsg(pPeer->syncFd, pHead, wsize);
@@ -286,8 +282,7 @@ static int syncRetrieveLastWal(SSyncPeer *pPeer, char *name, uint64_t fversion,
   return -1;
 }
 
-static int syncProcessLastWal(SSyncPeer *pPeer, char *wname, uint32_t index) 
-{
+static int syncProcessLastWal(SSyncPeer *pPeer, char *wname, uint32_t index) {
   SSyncNode  *pNode = pPeer->pSyncNode;
   int         code = -1;
   char        fname[TSDB_FILENAME_LEN * 2];  // full path to wal file
@@ -350,12 +345,16 @@ static int syncProcessLastWal(SSyncPeer *pPeer, char *wname, uint32_t index)
     }
 
     if (code < 0) break;
-    if (pPeer->sversion >= fversion && fversion > 0) break;  
+    if (pPeer->sversion >= fversion && fversion > 0) break;
 
-    index++;  wname[0] = 0;
+    index++;
+    wname[0] = 0;
     code = (*pNode->getWalInfo)(pNode->ahandle, wname, &index);
-    if ( code < 0) break;  
-    if ( wname[0] == 0 ) {code = 0; break;}
+    if (code < 0) break;
+    if (wname[0] == 0) {
+      code = 0;
+      break;
+    }
 
     // current last wal is closed, there is a new one 
     sDebug("%s, last wal is closed, try new one", pPeer->id);
@@ -366,9 +365,8 @@ static int syncProcessLastWal(SSyncPeer *pPeer, char *wname, uint32_t index)
   return code;
 }
 
-static int syncRetrieveWal(SSyncPeer *pPeer)
-{
-  SSyncNode  *pNode = pPeer->pSyncNode;
+static int syncRetrieveWal(SSyncPeer *pPeer) {
+  SSyncNode * pNode = pPeer->pSyncNode;
   char        fname[TSDB_FILENAME_LEN * 3];
   char        wname[TSDB_FILENAME_LEN * 2];
   int32_t     size;
@@ -396,7 +394,7 @@ static int syncRetrieveWal(SSyncPeer *pPeer)
 
     // send wal file, 
     // inotify is not required, old wal file won't be modified, even remove is ok
-    if ( stat(fname, &fstat) < 0 ) break;
+    if (stat(fname, &fstat) < 0) break;
     size = fstat.st_size;
 
     sDebug("%s, retrieve wal:%s size:%d", pPeer->id, fname, size);    
@@ -425,9 +423,8 @@ static int syncRetrieveWal(SSyncPeer *pPeer)
   return code;
 }
 
-static int syncRetrieveDataStepByStep(SSyncPeer *pPeer)
-{
-  SSyncNode  *pNode = pPeer->pSyncNode;
+static int syncRetrieveDataStepByStep(SSyncPeer *pPeer) {
+  SSyncNode *pNode = pPeer->pSyncNode;
 
   SFirstPkt firstPkt;
   memset(&firstPkt, 0, sizeof(firstPkt));
@@ -462,9 +459,8 @@ static int syncRetrieveDataStepByStep(SSyncPeer *pPeer)
   return 0;
 }
 
-void *syncRetrieveData(void *param)
-{
-  SSyncPeer  *pPeer = (SSyncPeer *)param;
+void *syncRetrieveData(void *param) {
+  SSyncPeer * pPeer = (SSyncPeer *)param;
   SSyncNode  *pNode = pPeer->pSyncNode;
   taosBlockSIGPIPE();
 
diff --git a/src/sync/src/taosTcpPool.c b/src/sync/src/taosTcpPool.c
index b523728bf9357e17602c75e3822284c2871e8511..2f064ceb3690e4e8111d67fd2fce224add74717c 100644
--- a/src/sync/src/taosTcpPool.c
+++ b/src/sync/src/taosTcpPool.c
@@ -48,8 +48,7 @@ static void *taosProcessTcpData(void *param);
 static SThreadObj *taosGetTcpThread(SPoolObj *pPool);
 static void taosStopPoolThread(SThreadObj* pThread);
 
-void *taosOpenTcpThreadPool(SPoolInfo *pInfo)
-{
+void *taosOpenTcpThreadPool(SPoolInfo *pInfo) {
   pthread_attr_t thattr;
 
   SPoolObj *pPool = calloc(sizeof(SPoolObj), 1);
@@ -89,8 +88,7 @@ void *taosOpenTcpThreadPool(SPoolInfo *pInfo)
   return pPool;
 }
 
-void taosCloseTcpThreadPool(void *param)
-{
+void taosCloseTcpThreadPool(void *param) {
   SPoolObj    *pPool = (SPoolObj *)param;
   SThreadObj  *pThread;
 
@@ -107,8 +105,7 @@ void taosCloseTcpThreadPool(void *param)
   uDebug("%p TCP pool is closed", pPool);
 }
 
-void *taosAllocateTcpConn(void *param, void *pPeer, int connFd)
-{
+void *taosAllocateTcpConn(void *param, void *pPeer, int connFd) {
   struct epoll_event event;
   SPoolObj *pPool = (SPoolObj *)param;
 
@@ -145,9 +142,8 @@ void *taosAllocateTcpConn(void *param, void *pPeer, int connFd)
   return pConn;
 }
 
-void taosFreeTcpConn(void *param)
-{
-  SConnObj *pConn = (SConnObj *)param;
+void taosFreeTcpConn(void *param) {
+  SConnObj *    pConn = (SConnObj *)param;
   SThreadObj   *pThread = pConn->pThread;
 
   uDebug("%p TCP connection will be closed, fd:%d", pThread, pConn->fd);
diff --git a/src/sync/src/tarbitrator.c b/src/sync/src/tarbitrator.c
index 625c0d68386535297ffb1e92e112e1a18d58a48b..d281642a47a21d54f507414b234c6c2f5fbc234d 100644
--- a/src/sync/src/tarbitrator.c
+++ b/src/sync/src/tarbitrator.c
@@ -156,9 +156,8 @@ static void arbProcessBrokenLink(void *param) {
   taosTFree(pNode);
 }
 
-static int arbProcessPeerMsg(void *param, void *buffer)
-{
-  SNodeConn  *pNode = param;
+static int arbProcessPeerMsg(void *param, void *buffer) {
+  SNodeConn * pNode = param;
   SSyncHead   head;
   int         bytes = 0;
   char       *cont = (char *)buffer;
@@ -180,7 +179,6 @@ static int arbProcessPeerMsg(void *param, void *buffer)
 }
 
 static void arbSignalHandler(int32_t signum, siginfo_t *sigInfo, void *context) {
-
   struct sigaction act = {{0}};
   act.sa_handler = SIG_IGN;
   sigaction(SIGTERM, &act, NULL);
@@ -192,4 +190,3 @@ static void arbSignalHandler(int32_t signum, siginfo_t *sigInfo, void *context)
   // inform main thread to exit
   tsem_post(&tsArbSem);
 }
-
diff --git a/src/vnode/src/vnodeMain.c b/src/vnode/src/vnodeMain.c
index 6a94c9c6d6681d967c856019db46ef9ab43e8083..176a45116837eeb9c62be490de1d871659f741ce 100644
--- a/src/vnode/src/vnodeMain.c
+++ b/src/vnode/src/vnodeMain.c
@@ -290,6 +290,8 @@ int32_t vnodeOpen(int32_t vnode, char *rootDir) {
   pVnode->sync = syncStart(&syncInfo);
 
   if (pVnode->sync == NULL) {
+    vError("vgId:%d, failed to open sync module, replica:%d reason:%s", pVnode->vgId, pVnode->syncCfg.replica,
+           tstrerror(terrno));
     vnodeCleanUp(pVnode);
     return terrno;
   }