diff --git a/include/util/taoserror.h b/include/util/taoserror.h
index 7cc1a47404..2d7b15ebda 100644
--- a/include/util/taoserror.h
+++ b/include/util/taoserror.h
@@ -517,6 +517,7 @@ int32_t* taosGetErrno();
 #define TSDB_CODE_SYN_STANDBY_NOT_READY         TAOS_DEF_ERROR_CODE(0, 0x0912)
 #define TSDB_CODE_SYN_BATCH_ERROR               TAOS_DEF_ERROR_CODE(0, 0x0913)
 #define TSDB_CODE_SYN_RESTORING                 TAOS_DEF_ERROR_CODE(0, 0x0914)
+#define TSDB_CODE_SYN_INVALID_SNAPSHOT_MSG      TAOS_DEF_ERROR_CODE(0, 0x0915)  // internal
 #define TSDB_CODE_SYN_INTERNAL_ERROR            TAOS_DEF_ERROR_CODE(0, 0x09FF)
 
 // tq
diff --git a/source/dnode/vnode/src/vnd/vnodeCommit.c b/source/dnode/vnode/src/vnd/vnodeCommit.c
index be977e7cbd..f78956a431 100644
--- a/source/dnode/vnode/src/vnd/vnodeCommit.c
+++ b/source/dnode/vnode/src/vnd/vnodeCommit.c
@@ -234,10 +234,11 @@ int vnodeAsyncCommit(SVnode *pVnode) {
 
 _exit:
   if (code) {
-    vError("vgId:%d, %s failed since %s, commit id:%" PRId64, TD_VID(pVnode), __func__, tstrerror(code),
+    vError("vgId:%d, vnode async commit failed since %s, commitId:%" PRId64, TD_VID(pVnode), tstrerror(code),
            pVnode->state.commitID);
   } else {
-    vDebug("vgId:%d, %s done", TD_VID(pVnode), __func__);
+    vInfo("vgId:%d, vnode async commit done, commitId:%" PRId64 " term:%" PRId64 " applied:%" PRId64, TD_VID(pVnode),
+          pVnode->state.commitID, pVnode->state.applyTerm, pVnode->state.applied);
   }
   return code;
 }
@@ -256,7 +257,7 @@ static int vnodeCommitImpl(SCommitInfo *pInfo) {
   char    dir[TSDB_FILENAME_LEN] = {0};
   SVnode *pVnode = pInfo->pVnode;
 
-  vInfo("vgId:%d, start to commit, commit ID:%" PRId64 " version:%" PRId64 " term: %" PRId64, TD_VID(pVnode),
+  vInfo("vgId:%d, start to commit, commitId:%" PRId64 " version:%" PRId64 " term: %" PRId64, TD_VID(pVnode),
         pVnode->state.commitID, pVnode->state.applied, pVnode->state.applyTerm);
 
   // persist wal before starting
diff --git a/source/dnode/vnode/src/vnd/vnodeSnapshot.c b/source/dnode/vnode/src/vnd/vnodeSnapshot.c
index fcfacd1ca9..dbd06d6ec0 100644
--- a/source/dnode/vnode/src/vnd/vnodeSnapshot.c
+++ b/source/dnode/vnode/src/vnd/vnodeSnapshot.c
@@ -423,7 +423,7 @@ int32_t vnodeSnapWrite(SVSnapWriter *pWriter, uint8_t *pData, uint32_t nData) {
   ASSERT(pHdr->index == pWriter->index + 1);
   pWriter->index = pHdr->index;
 
-  vInfo("vgId:%d, vnode snapshot write data, index:%" PRId64 " type:%d nData:%d", TD_VID(pVnode), pHdr->index,
+  vInfo("vgId:%d, vnode snapshot write data, index:%" PRId64 " type:%d blockLen:%d", TD_VID(pVnode), pHdr->index,
         pHdr->type, nData);
 
   switch (pHdr->type) {
diff --git a/source/dnode/vnode/src/vnd/vnodeSync.c b/source/dnode/vnode/src/vnd/vnodeSync.c
index 5caaae502f..0437703c92 100644
--- a/source/dnode/vnode/src/vnd/vnodeSync.c
+++ b/source/dnode/vnode/src/vnd/vnodeSync.c
@@ -465,9 +465,9 @@ static int32_t vnodeSnapshotStopWrite(const SSyncFSM *pFsm, void *pWriter, bool
 
 static int32_t vnodeSnapshotDoWrite(const SSyncFSM *pFsm, void *pWriter, void *pBuf, int32_t len) {
   SVnode *pVnode = pFsm->data;
-  vDebug("vgId:%d, continue write vnode snapshot, len:%d", pVnode->config.vgId, len);
+  vDebug("vgId:%d, continue write vnode snapshot, blockLen:%d", pVnode->config.vgId, len);
   int32_t code = vnodeSnapWrite(pWriter, pBuf, len);
-  vDebug("vgId:%d, continue write vnode snapshot finished, len:%d", pVnode->config.vgId, len);
+  vDebug("vgId:%d, continue write vnode snapshot finished, blockLen:%d", pVnode->config.vgId, len);
   return code;
 }
 
diff --git a/source/libs/sync/src/syncSnapshot.c b/source/libs/sync/src/syncSnapshot.c
index 30324c1113..7a35f90165 100644
--- a/source/libs/sync/src/syncSnapshot.c
+++ b/source/libs/sync/src/syncSnapshot.c
@@ -294,7 +294,7 @@ int32_t syncNodeStartSnapshot(SSyncNode *pSyncNode, SRaftId *pDestId) {
   }
 
   if (snapshotSenderIsStart(pSender)) {
-    sSError(pSender, "snapshot sender already start, ignore");
+    sSInfo(pSender, "snapshot sender already start, ignore");
     return 0;
   }
 
@@ -523,7 +523,7 @@ static int32_t snapshotReceiverFinish(SSyncSnapshotReceiver *pReceiver, SyncSnap
 static int32_t snapshotReceiverGotData(SSyncSnapshotReceiver *pReceiver, SyncSnapshotSend *pMsg) {
   if (pMsg->seq != pReceiver->ack + 1) {
     sRError(pReceiver, "snapshot receiver invalid seq, ack:%d seq:%d", pReceiver->ack, pMsg->seq);
-    terrno = TSDB_CODE_SYN_INTERNAL_ERROR;
+    terrno = TSDB_CODE_SYN_INVALID_SNAPSHOT_MSG;
     return -1;
   }
 
@@ -721,8 +721,12 @@ static int32_t syncNodeOnSnapshotTransfering(SSyncNode *pSyncNode, SyncSnapshotS
     timeNow = taosGetTimestampMs();
   }
 
+  int32_t code = 0;
   if (snapshotReceiverGotData(pReceiver, pMsg) != 0) {
-    return -1;
+    code = terrno;
+    if (code >= SYNC_SNAPSHOT_SEQ_INVALID) {
+      code = TSDB_CODE_SYN_INTERNAL_ERROR;
+    }
   }
 
   // build msg
@@ -740,7 +744,7 @@ static int32_t syncNodeOnSnapshotTransfering(SSyncNode *pSyncNode, SyncSnapshotS
   pRspMsg->lastTerm = pMsg->lastTerm;
   pRspMsg->startTime = pReceiver->startTime;
   pRspMsg->ack = pReceiver->ack;  // receiver maybe already closed
-  pRspMsg->code = 0;
+  pRspMsg->code = code;
   pRspMsg->snapBeginIndex = pReceiver->snapshotParam.start;
 
   // send msg
@@ -861,7 +865,7 @@ int32_t syncNodeOnSnapshot(SSyncNode *pSyncNode, const SRpcMsg *pRpcMsg) {
         syncLogRecvSyncSnapshotSend(pSyncNode, pMsg, "process force stop");
         snapshotReceiverForceStop(pReceiver);
       } else if (pMsg->seq > SYNC_SNAPSHOT_SEQ_BEGIN && pMsg->seq < SYNC_SNAPSHOT_SEQ_END) {
-        syncLogRecvSyncSnapshotSend(pSyncNode, pMsg, "process seq");
+        syncLogRecvSyncSnapshotSend(pSyncNode, pMsg, "process seq data");
         syncNodeOnSnapshotTransfering(pSyncNode, pMsg);
       } else {
         // error log
@@ -982,68 +986,85 @@ int32_t syncNodeOnSnapshotRsp(SSyncNode *pSyncNode, const SRpcMsg *pRpcMsg) {
   }
 
   // state, term, seq/ack
-  if (pSyncNode->state == TAOS_SYNC_STATE_LEADER) {
-    if (pMsg->term == pSyncNode->pRaftStore->currentTerm) {
-      // prepare <begin, end>, send begin msg
-      if (pMsg->ack == SYNC_SNAPSHOT_SEQ_PRE_SNAPSHOT) {
-        syncLogRecvSyncSnapshotRsp(pSyncNode, pMsg, "process seq pre-snapshot");
-        syncNodeOnSnapshotReplyPre(pSyncNode, pMsg);
-        return 0;
-      }
+  if (pSyncNode->state != TAOS_SYNC_STATE_LEADER) {
+    sSError(pSender, "snapshot sender not leader");
+    return -1;
+  }
 
-      if (pMsg->ack == SYNC_SNAPSHOT_SEQ_BEGIN) {
-        syncLogRecvSyncSnapshotRsp(pSyncNode, pMsg, "process seq begin");
-        if (snapshotSenderUpdateProgress(pSender, pMsg) != 0) {
-          return -1;
-        }
+  if (pMsg->term != pSyncNode->pRaftStore->currentTerm) {
+    sSError(pSender, "snapshot sender term not equal");
+    return -1;
+  }
 
-        if (snapshotSend(pSender) != 0) {
-          return -1;
-        }
-        return 0;
-      }
+  if (pMsg->code != 0) {
+    syncLogRecvSyncSnapshotRsp(pSyncNode, pMsg, "receive error code");
+    sSError(pSender, "snapshot sender receive error code:0x%x and stop sender", pMsg->code);
+    snapshotSenderStop(pSender, true);
+    SSyncLogReplMgr *pMgr = syncNodeGetLogReplMgr(pSyncNode, &pMsg->srcId);
+    if (pMgr) {
+      syncLogReplMgrReset(pMgr);
+    }
 
-      // receive ack is finish, close sender
-      if (pMsg->ack == SYNC_SNAPSHOT_SEQ_END) {
-        syncLogRecvSyncSnapshotRsp(pSyncNode, pMsg, "process seq end");
-        snapshotSenderStop(pSender, true);
-        SSyncLogReplMgr *pMgr = syncNodeGetLogReplMgr(pSyncNode, &pMsg->srcId);
-        if (pMgr) {
-          syncLogRecvSyncSnapshotRsp(pSyncNode, pMsg, "reset repl mgr");
-          syncLogReplMgrReset(pMgr);
-        }
-        return 0;
-      }
+    return -1;
+  }
 
-      // send next msg
-      if (pMsg->ack == pSender->seq) {
-        syncLogRecvSyncSnapshotRsp(pSyncNode, pMsg, "process seq");
-        // update sender ack
-        if (snapshotSenderUpdateProgress(pSender, pMsg) != 0) {
-          return -1;
-        }
-        if (snapshotSend(pSender) != 0) {
-          return -1;
-        }
+  // prepare <begin, end>, send begin msg
+  if (pMsg->ack == SYNC_SNAPSHOT_SEQ_PRE_SNAPSHOT) {
+    syncLogRecvSyncSnapshotRsp(pSyncNode, pMsg, "process seq pre-snapshot");
+    syncNodeOnSnapshotReplyPre(pSyncNode, pMsg);
+    return 0;
+  }
 
-      } else if (pMsg->ack == pSender->seq - 1) {
-        // maybe resend
-        syncLogRecvSyncSnapshotRsp(pSyncNode, pMsg, "process seq and resend");
-        snapshotReSend(pSender);
-
-      } else {
-        // error log
-        sSError(pSender, "snapshot sender recv error ack:%d, my seq:%d", pMsg->ack, pSender->seq);
-        return -1;
-      }
-    } else {
-      // error log
-      sSError(pSender, "snapshot sender term not equal");
+  if (pMsg->ack == SYNC_SNAPSHOT_SEQ_BEGIN) {
+    syncLogRecvSyncSnapshotRsp(pSyncNode, pMsg, "process seq begin");
+    if (snapshotSenderUpdateProgress(pSender, pMsg) != 0) {
       return -1;
     }
+
+    if (snapshotSend(pSender) != 0) {
+      return -1;
+    }
+    return 0;
+  }
+
+  // receive ack is finish, close sender
+  if (pMsg->ack == SYNC_SNAPSHOT_SEQ_END) {
+    syncLogRecvSyncSnapshotRsp(pSyncNode, pMsg, "process seq end");
+    snapshotSenderStop(pSender, true);
+    SSyncLogReplMgr *pMgr = syncNodeGetLogReplMgr(pSyncNode, &pMsg->srcId);
+    if (pMgr) {
+      syncLogRecvSyncSnapshotRsp(pSyncNode, pMsg, "reset repl mgr");
+      syncLogReplMgrReset(pMgr);
+    }
+    return 0;
+  }
+
+  // send next msg
+  if (pMsg->ack == pSender->seq) {
+    syncLogRecvSyncSnapshotRsp(pSyncNode, pMsg, "process seq data");
+    // update sender ack
+    if (snapshotSenderUpdateProgress(pSender, pMsg) != 0) {
+      return -1;
+    }
+    if (snapshotSend(pSender) != 0) {
+      return -1;
+    }
+
+  } else if (pMsg->ack == pSender->seq - 1) {
+    // maybe resend
+    syncLogRecvSyncSnapshotRsp(pSyncNode, pMsg, "process seq and resend");
+    snapshotReSend(pSender);
+
   } else {
     // error log
-    sSError(pSender, "snapshot sender not leader");
+    syncLogRecvSyncSnapshotRsp(pSyncNode, pMsg, "receive error ack");
+    sSError(pSender, "snapshot sender receive error ack:%d, my seq:%d", pMsg->ack, pSender->seq);
+    snapshotSenderStop(pSender, true);
+    SSyncLogReplMgr *pMgr = syncNodeGetLogReplMgr(pSyncNode, &pMsg->srcId);
+    if (pMgr) {
+      syncLogReplMgrReset(pMgr);
+    }
+
     return -1;
   }
 
diff --git a/source/libs/sync/test/syncRaftLogTest2.cpp b/source/libs/sync/test/syncRaftLogTest2.cpp
index a7752dcb8b..de9137fbe1 100644
--- a/source/libs/sync/test/syncRaftLogTest2.cpp
+++ b/source/libs/sync/test/syncRaftLogTest2.cpp
@@ -47,7 +47,7 @@ void init() {
   pSyncNode->pWal = pWal;
 
   pSyncNode->pFsm = (SSyncFSM*)taosMemoryMalloc(sizeof(SSyncFSM));
-  pSyncNode->pFsm->FpGetSnapshotInfo = GetSnapshotCb;
+  // pSyncNode->pFsm->FpGetSnapshotInfo = GetSnapshotCb;
 }
 
 void cleanup() {
diff --git a/source/libs/sync/test/syncRaftLogTest3.cpp b/source/libs/sync/test/syncRaftLogTest3.cpp
index 31c06625aa..1eed08102f 100644
--- a/source/libs/sync/test/syncRaftLogTest3.cpp
+++ b/source/libs/sync/test/syncRaftLogTest3.cpp
@@ -47,7 +47,7 @@ void init() {
   pSyncNode->pWal = pWal;
 
   pSyncNode->pFsm = (SSyncFSM*)taosMemoryMalloc(sizeof(SSyncFSM));
-  pSyncNode->pFsm->FpGetSnapshotInfo = GetSnapshotCb;
+  // pSyncNode->pFsm->FpGetSnapshotInfo = GetSnapshotCb;
 }
 
 void cleanup() {
diff --git a/source/util/src/terror.c b/source/util/src/terror.c
index d73c8661fc..e59b1daa05 100644
--- a/source/util/src/terror.c
+++ b/source/util/src/terror.c
@@ -405,6 +405,7 @@ TAOS_DEFINE_ERROR(TSDB_CODE_SYN_PROPOSE_NOT_READY,        "Sync not ready for pr
 TAOS_DEFINE_ERROR(TSDB_CODE_SYN_STANDBY_NOT_READY,        "Sync not ready for standby")
 TAOS_DEFINE_ERROR(TSDB_CODE_SYN_BATCH_ERROR,              "Sync batch error")
 TAOS_DEFINE_ERROR(TSDB_CODE_SYN_RESTORING,                "Sync is restoring")
+TAOS_DEFINE_ERROR(TSDB_CODE_SYN_INVALID_SNAPSHOT_MSG,     "Sync invalid snapshot msg")
 TAOS_DEFINE_ERROR(TSDB_CODE_SYN_INTERNAL_ERROR,           "Sync internal error")
 
 //tq