diff --git a/src/inc/taoserror.h b/src/inc/taoserror.h
index be33262f7f75f20485c977c3b3a7378a6021481a..c913b2cf2a6fb1506d5c6d9b1d483ec063bede01 100644
--- a/src/inc/taoserror.h
+++ b/src/inc/taoserror.h
@@ -266,6 +266,7 @@ TAOS_DEFINE_ERROR(TSDB_CODE_SYN_INVALID_CONFIG,           0, 0x0900, "Invalid Sy
 TAOS_DEFINE_ERROR(TSDB_CODE_SYN_NOT_ENABLED,              0, 0x0901, "Sync module not enabled")
 TAOS_DEFINE_ERROR(TSDB_CODE_SYN_INVALID_VERSION,          0, 0x0902, "Invalid Sync version")
 TAOS_DEFINE_ERROR(TSDB_CODE_SYN_CONFIRM_EXPIRED,          0, 0x0903, "Sync confirm expired")
+TAOS_DEFINE_ERROR(TSDB_CODE_SYN_TOO_MANY_FWDINFO,         0, 0x0904, "Too many sync fwd infos")
 
 // wal
 TAOS_DEFINE_ERROR(TSDB_CODE_WAL_APP_ERROR,                0, 0x1000, "Unexpected generic error in wal")
diff --git a/src/inc/tsync.h b/src/inc/tsync.h
index 1303195ef149a98b6ddd7ffe55615d27eaeba04d..0ce2a1a495b7826635d07ac9139cb77b306c9330 100644
--- a/src/inc/tsync.h
+++ b/src/inc/tsync.h
@@ -121,7 +121,6 @@ extern char *syncRole[];
 //global configurable parameters
 extern int32_t  tsMaxSyncNum;
 extern int32_t  tsSyncTcpThreads;
-extern int32_t  tsMaxWatchFiles;
 extern int32_t  tsSyncTimer;
 extern int32_t  tsMaxFwdInfo;
 extern int32_t  sDebugFlag;
diff --git a/src/sync/src/syncMain.c b/src/sync/src/syncMain.c
index 080c7d3514eba702292fa43f368c5ae7ae927e29..aae5dab3cdd5d394307dbbc8c5c4b0040a05d4a7 100644
--- a/src/sync/src/syncMain.c
+++ b/src/sync/src/syncMain.c
@@ -32,8 +32,7 @@
 // global configurable
 int32_t tsMaxSyncNum = 2;
 int32_t tsSyncTcpThreads = 2;
-int32_t tsMaxWatchFiles = 500;
-int32_t tsMaxFwdInfo = 200;
+int32_t tsMaxFwdInfo = 512;
 int32_t tsSyncTimer = 1;
 
 // module global, not configurable
@@ -60,7 +59,7 @@ static void    syncRemoveConfirmedFwdInfo(SSyncNode *pNode);
 static void    syncMonitorFwdInfos(void *param, void *tmrId);
 static void    syncMonitorNodeRole(void *param, void *tmrId);
 static void    syncProcessFwdAck(SSyncNode *pNode, SFwdInfo *pFwdInfo, int32_t code);
-static void    syncSaveFwdInfo(SSyncNode *pNode, uint64_t version, void *mhandle);
+static int32_t syncSaveFwdInfo(SSyncNode *pNode, uint64_t version, void *mhandle);
 static void    syncRestartPeer(SSyncPeer *pPeer);
 static int32_t syncForwardToPeerImpl(SSyncNode *pNode, void *data, void *mhandle, int32_t qtyp);
 static SSyncPeer *syncAddPeer(SSyncNode *pNode, const SNodeInfo *pInfo);
@@ -892,15 +891,24 @@ static void syncProcessFwdResponse(char *cont, SSyncPeer *pPeer) {
   sTrace("%s, forward-rsp is received, code:%x hver:%" PRIu64, pPeer->id, pFwdRsp->code, pFwdRsp->version);
   SFwdInfo *pFirst = pSyncFwds->fwdInfo + pSyncFwds->first;
 
+  bool found = false;
   if (pFirst->version <= pFwdRsp->version && pSyncFwds->fwds > 0) {
     // find the forwardInfo from first
     for (int32_t i = 0; i < pSyncFwds->fwds; ++i) {
       pFwdInfo = pSyncFwds->fwdInfo + (i + pSyncFwds->first) % tsMaxFwdInfo;
-      if (pFwdRsp->version == pFwdInfo->version) break;
+      if (pFwdRsp->version == pFwdInfo->version) {
+        found = true;
+        syncProcessFwdAck(pNode, pFwdInfo, pFwdRsp->code);
+        syncRemoveConfirmedFwdInfo(pNode);
+        break;
+      }
     }
+  }
 
+  if (!found) {
+    sTrace("%s, forward-rsp not found first:%d fwds:%d, code:%x hver:%" PRIu64, pPeer->id, pSyncFwds->first,
+           pSyncFwds->fwds, pFwdRsp->code, pFwdRsp->version);
     syncProcessFwdAck(pNode, pFwdInfo, pFwdRsp->code);
-    syncRemoveConfirmedFwdInfo(pNode);
   }
 }
 
@@ -1180,13 +1188,15 @@ static void syncProcessBrokenLink(void *param) {
   taosReleaseRef(tsSyncRefId, pNode->rid);
 }
 
-static void syncSaveFwdInfo(SSyncNode *pNode, uint64_t version, void *mhandle) {
+static int32_t syncSaveFwdInfo(SSyncNode *pNode, uint64_t version, void *mhandle) {
   SSyncFwds *pSyncFwds = pNode->pSyncFwds;
   int64_t    time = taosGetTimestampMs();
 
   if (pSyncFwds->fwds >= tsMaxFwdInfo) {
-    pSyncFwds->first = (pSyncFwds->first + 1) % tsMaxFwdInfo;
-    pSyncFwds->fwds--;
+    // pSyncFwds->first = (pSyncFwds->first + 1) % tsMaxFwdInfo;
+    // pSyncFwds->fwds--;
+    sError("vgId:%d, failed to save fwd info, hver:%" PRIu64 " fwds:%d", pNode->vgId, version, pSyncFwds->fwds);
+    return TSDB_CODE_SYN_TOO_MANY_FWDINFO;
   }
 
   if (pSyncFwds->fwds > 0) {
@@ -1201,6 +1211,8 @@ static void syncSaveFwdInfo(SSyncNode *pNode, uint64_t version, void *mhandle) {
 
   pSyncFwds->fwds++;
   sTrace("vgId:%d, fwd info is saved, hver:%" PRIu64 " fwds:%d ", pNode->vgId, version, pSyncFwds->fwds);
+
+  return 0;
 }
 
 static void syncRemoveConfirmedFwdInfo(SSyncNode *pNode) {
@@ -1214,8 +1226,7 @@ static void syncRemoveConfirmedFwdInfo(SSyncNode *pNode) {
     pSyncFwds->first = (pSyncFwds->first + 1) % tsMaxFwdInfo;
     pSyncFwds->fwds--;
     if (pSyncFwds->fwds == 0) pSyncFwds->first = pSyncFwds->last;
-    // sDebug("vgId:%d, fwd info is removed, hver:%d, fwds:%d",
-    //        pNode->vgId, pFwdInfo->version, pSyncFwds->fwds);
+    sTrace("vgId:%d, fwd info is removed, hver:%" PRIu64 " fwds:%d", pNode->vgId, pFwdInfo->version, pSyncFwds->fwds);
     memset(pFwdInfo, 0, sizeof(SFwdInfo));
   }
 }
@@ -1341,8 +1352,8 @@ static int32_t syncForwardToPeerImpl(SSyncNode *pNode, void *data, void *mhandle
     if (pPeer->role != TAOS_SYNC_ROLE_SLAVE && pPeer->sstatus != TAOS_SYNC_STATUS_CACHE) continue;
 
     if (pNode->quorum > 1 && code == 0) {
-      syncSaveFwdInfo(pNode, pWalHead->version, mhandle);
-      code = 1;
+      code = syncSaveFwdInfo(pNode, pWalHead->version, mhandle);
+      if (code >= 0) code = 1;
     }
 
     int32_t retLen = taosWriteMsg(pPeer->peerFd, pSyncHead, fwdLen);
diff --git a/tests/test/c/createTablePerformance.c b/tests/test/c/createTablePerformance.c
index eae104291a3bfcbb37e6a2c89d61214c61d4b6c0..b94c687f2cba7310949b0a3b12b6f4fc007e5a9a 100644
--- a/tests/test/c/createTablePerformance.c
+++ b/tests/test/c/createTablePerformance.c
@@ -32,6 +32,7 @@ int32_t numOfThreads = 30;
 int32_t numOfTables = 100000;
 int32_t replica = 1;
 int32_t numOfColumns = 2;
+TAOS *  con = NULL;
 
 typedef struct {
   int32_t   tableBeginIndex;
@@ -84,13 +85,14 @@ int main(int argc, char *argv[]) {
 
   pthread_attr_destroy(&thattr);
   free(pInfo);
+  taos_close(con);
 }
 
 void createDbAndSTable() {
   pPrint("start to create db and stable");
   char qstr[64000];
   
-  TAOS *con = taos_connect(NULL, "root", "taosdata", NULL, 0);
+  con = taos_connect(NULL, "root", "taosdata", NULL, 0);
   if (con == NULL) {
     pError("failed to connect to DB, reason:%s", taos_errstr(con));
     exit(1);
@@ -127,8 +129,6 @@ void createDbAndSTable() {
     exit(0);
   }
   taos_free_result(pSql);
-
-  taos_close(con);
 }
 
 void *threadFunc(void *param) {
@@ -136,12 +136,6 @@ void *threadFunc(void *param) {
   char qstr[65000];
   int  code;
 
-  TAOS *con = taos_connect(NULL, "root", "taosdata", NULL, 0);
-  if (con == NULL) {
-    pError("index:%d, failed to connect to DB, reason:%s", pInfo->threadIndex, taos_errstr(con));
-    exit(1);
-  }
-
   sprintf(qstr, "use %s", pInfo->dbName);
   TAOS_RES *pSql = taos_query(con, qstr);
   taos_free_result(pSql);
@@ -170,7 +164,6 @@ void *threadFunc(void *param) {
   pInfo->createTableSpeed = speed;
 
   pPrint("thread:%d, time:%.2f sec, speed:%.1f tables/second, ", pInfo->threadIndex, seconds, speed);
-  taos_close(con);
 
   return 0;
 }