diff --git a/source/libs/sync/src/syncCommit.c b/source/libs/sync/src/syncCommit.c
index 60bec6ab659cbb92c275465c803a44f26581f484..dbe72bea7a2b7bdd2e6091da879cfd471460fc37 100644
--- a/source/libs/sync/src/syncCommit.c
+++ b/source/libs/sync/src/syncCommit.c
@@ -171,7 +171,7 @@ void syncMaybeAdvanceCommitIndex(SSyncNode* pSyncNode) {
     pSyncNode->pLogStore->syncLogUpdateCommitIndex(pSyncNode->pLogStore, pSyncNode->commitIndex);
 
     // execute fsm
-    if (pSyncNode->pFsm != NULL) {
+    if (pSyncNode != NULL && pSyncNode->pFsm != NULL) {
       int32_t code = syncNodeDoCommit(pSyncNode, beginIndex, endIndex, pSyncNode->state);
       if (code != 0) {
         sNError(pSyncNode, "advance commit index error, do commit begin:%" PRId64 ", end:%" PRId64, beginIndex,
diff --git a/source/libs/sync/src/syncRaftEntry.c b/source/libs/sync/src/syncRaftEntry.c
index a7594091639c3ce69c25abfe993b908e43084c28..4329722958187fd8ac73fe2898e57b92a5d963fa 100644
--- a/source/libs/sync/src/syncRaftEntry.c
+++ b/source/libs/sync/src/syncRaftEntry.c
@@ -64,7 +64,7 @@ SSyncRaftEntry* syncEntryBuildFromRpcMsg(const SRpcMsg* pMsg, SyncTerm term, Syn
 }
 
 SSyncRaftEntry* syncEntryBuildFromAppendEntries(const SyncAppendEntries* pMsg) {
-  SSyncRaftEntry* pEntry = syncEntryBuild(pMsg->dataLen);
+  SSyncRaftEntry* pEntry = syncEntryBuild((int32_t)(pMsg->dataLen));
   if (pEntry == NULL) return NULL;
 
   memcpy(pEntry, pMsg->data, pMsg->dataLen);
@@ -91,15 +91,14 @@ SSyncRaftEntry* syncEntryBuildNoop(SyncTerm term, SyncIndex index, int32_t vgId)
 
 void syncEntryDestory(SSyncRaftEntry* pEntry) {
   if (pEntry != NULL) {
-    taosMemoryFree(pEntry);
-
     sTrace("free entry: %p", pEntry);
+    taosMemoryFree(pEntry);
   }
 }
 
 void syncEntry2OriginalRpc(const SSyncRaftEntry* pEntry, SRpcMsg* pRpcMsg) {
   pRpcMsg->msgType = pEntry->originalRpcType;
-  pRpcMsg->contLen = pEntry->dataLen;
+  pRpcMsg->contLen = (int32_t)(pEntry->dataLen);
   pRpcMsg->pCont = rpcMallocCont(pRpcMsg->contLen);
   memcpy(pRpcMsg->pCont, pEntry->data, pRpcMsg->contLen);
 }
@@ -339,7 +338,8 @@ int32_t raftEntryCacheGetEntry(struct SRaftEntryCache* pCache, SyncIndex index,
   SSyncRaftEntry* pEntry = NULL;
   int32_t         code = raftEntryCacheGetEntryP(pCache, index, &pEntry);
   if (code == 1) {
-    *ppEntry = taosMemoryMalloc((int64_t)(pEntry->bytes));
+    int32_t bytes = (int32_t)pEntry->bytes;
+    *ppEntry = taosMemoryMalloc((int64_t)bytes);
     memcpy(*ppEntry, pEntry, pEntry->bytes);
     (*ppEntry)->rid = -1;
   } else {
diff --git a/source/libs/sync/src/syncReplication.c b/source/libs/sync/src/syncReplication.c
index 802595c55af72956434866ef9686b6f3c84d2a12..de5f71e5a99222ed433ffaa192766c5e8b4fdac4 100644
--- a/source/libs/sync/src/syncReplication.c
+++ b/source/libs/sync/src/syncReplication.c
@@ -91,7 +91,7 @@ int32_t syncNodeReplicateOne(SSyncNode* pSyncNode, SRaftId* pDestId, bool snapsh
   if (code == 0) {
     ASSERT(pEntry != NULL);
 
-    code = syncBuildAppendEntries(&rpcMsg, pEntry->bytes, pSyncNode->vgId);
+    code = syncBuildAppendEntries(&rpcMsg, (int32_t)(pEntry->bytes), pSyncNode->vgId);
     ASSERT(code == 0);
 
     pMsg = rpcMsg.pCont;
diff --git a/source/libs/sync/src/syncUtil.c b/source/libs/sync/src/syncUtil.c
index 4fc7dd245dc198881198419e9b1f87f2d7c46266..da6f8a52d92499abf4b21d0a5582f9dfb391ad21 100644
--- a/source/libs/sync/src/syncUtil.c
+++ b/source/libs/sync/src/syncUtil.c
@@ -229,7 +229,10 @@ void syncPrintNodeLog(const char* flags, ELogLevel level, int32_t dflag, SSyncNo
   int32_t writeLen = vsnprintf(eventLog, sizeof(eventLog), format, argpointer);
   va_end(argpointer);
 
-  int32_t aqItems = pNode->pFsm->FpApplyQueueItems(pNode->pFsm);
+  int32_t aqItems = 0;
+  if (pNode != NULL && pNode->pFsm != NULL && pNode->pFsm->FpApplyQueueItems != NULL) {
+    aqItems = pNode->pFsm->FpApplyQueueItems(pNode->pFsm);
+  }
 
   // restore error code
   terrno = errCode;