diff --git a/source/libs/sync/src/syncElection.c b/source/libs/sync/src/syncElection.c
index fc056c9eba..901b43023a 100644
--- a/source/libs/sync/src/syncElection.c
+++ b/source/libs/sync/src/syncElection.c
@@ -100,7 +100,11 @@ int32_t syncNodeElect(SSyncNode* pSyncNode) {
 
   if (voteGrantedMajority(pSyncNode->pVotesGranted)) {
     // only myself, to leader
-    ASSERT(!pSyncNode->pVotesGranted->toLeader);
+    if (pSyncNode->pVotesGranted->toLeader) {
+      ret = TSDB_CODE_SYN_INTERNAL_ERROR;
+      sError("vgId:%d, failed to elect since already be to leader", pSyncNode->vgId);
+      return ret;
+    }
     syncNodeCandidate2Leader(pSyncNode);
     pSyncNode->pVotesGranted->toLeader = true;
     return ret;
diff --git a/source/libs/sync/src/syncMain.c b/source/libs/sync/src/syncMain.c
index d947a488bf..215c8f9e58 100644
--- a/source/libs/sync/src/syncMain.c
+++ b/source/libs/sync/src/syncMain.c
@@ -726,7 +726,12 @@ int32_t syncUpdateArbTerm(int64_t rid, SyncTerm arbTerm) {
 }
 
 SyncIndex syncNodeGetSnapshotConfigIndex(SSyncNode* pSyncNode, SyncIndex snapshotLastApplyIndex) {
-  ASSERT(pSyncNode->raftCfg.configIndexCount >= 1);
+  if (!(pSyncNode->raftCfg.configIndexCount >= 1)) {
+    sError("vgId:%d, failed get snapshot config index, configIndexCount:%d", pSyncNode->vgId,
+           pSyncNode->raftCfg.configIndexCount);
+    terrno = TSDB_CODE_SYN_INTERNAL_ERROR;
+    return -2;
+  }
   SyncIndex lastIndex = (pSyncNode->raftCfg.configIndexArr)[0];
 
   for (int32_t i = 0; i < pSyncNode->raftCfg.configIndexCount; ++i) {
@@ -1477,9 +1482,18 @@ int32_t syncNodeStartStandBy(SSyncNode* pSyncNode) {
 #endif
 
 void syncNodePreClose(SSyncNode* pSyncNode) {
-  ASSERT(pSyncNode != NULL);
-  ASSERT(pSyncNode->pFsm != NULL);
-  ASSERT(pSyncNode->pFsm->FpApplyQueueItems != NULL);
+  if (pSyncNode == NULL) {
+    sError("failed to pre close sync node since sync node is null");
+    return;
+  }
+  if (pSyncNode->pFsm == NULL) {
+    sError("failed to pre close sync node since fsm is null");
+    return;
+  }
+  if (pSyncNode->pFsm->FpApplyQueueItems == NULL) {
+    sError("failed to pre close sync node since FpApplyQueueItems is null");
+    return;
+  }
 
   // stop elect timer
   (void)syncNodeStopElectTimer(pSyncNode);
@@ -2080,7 +2094,10 @@ void syncNodeBecomeLeader(SSyncNode* pSyncNode, const char* debugStr) {
     SyncIndex lastIndex;
     SyncTerm  lastTerm;
     int32_t   code = syncNodeGetLastIndexTerm(pSyncNode, &lastIndex, &lastTerm);
-    ASSERT(code == 0);
+    if (code != 0) {
+      sError("vgId:%d, failed to become leader since %s", pSyncNode->vgId, tstrerror(code));
+      return;
+    }
     pSyncNode->pNextIndex->index[i] = lastIndex + 1;
   }
 
@@ -2153,7 +2170,10 @@ void syncNodeBecomeAssignedLeader(SSyncNode* pSyncNode) {
     SyncIndex lastIndex;
     SyncTerm  lastTerm;
     int32_t   code = syncNodeGetLastIndexTerm(pSyncNode, &lastIndex, &lastTerm);
-    ASSERT(code == 0);
+    if (code != 0) {
+      sError("vgId:%d, failed to become assigned leader since %s", pSyncNode->vgId, tstrerror(code));
+      return;
+    }
     pSyncNode->pNextIndex->index[i] = lastIndex + 1;
   }
 
@@ -2196,7 +2216,10 @@ void syncNodeBecomeAssignedLeader(SSyncNode* pSyncNode) {
 }
 
 void syncNodeCandidate2Leader(SSyncNode* pSyncNode) {
-  ASSERT(pSyncNode->state == TAOS_SYNC_STATE_CANDIDATE);
+  if (pSyncNode->state != TAOS_SYNC_STATE_CANDIDATE) {
+    sError("vgId:%d, failed leader from candidate since node state is wrong:%d", pSyncNode->vgId, pSyncNode->state);
+    return;
+  }
   bool granted = voteGrantedMajority(pSyncNode->pVotesGranted);
   if (!granted) {
     sError("vgId:%d, not granted by majority.", pSyncNode->vgId);
@@ -2229,7 +2252,10 @@ int32_t syncNodePeerStateInit(SSyncNode* pSyncNode) {
 }
 
 void syncNodeFollower2Candidate(SSyncNode* pSyncNode) {
-  ASSERT(pSyncNode->state == TAOS_SYNC_STATE_FOLLOWER);
+  if (pSyncNode->state != TAOS_SYNC_STATE_FOLLOWER) {
+    sError("vgId:%d, failed candidate from follower since node state is wrong:%d", pSyncNode->vgId, pSyncNode->state);
+    return;
+  }
   pSyncNode->state = TAOS_SYNC_STATE_CANDIDATE;
   pSyncNode->roleTimeMs = taosGetTimestampMs();
   SyncIndex lastIndex = pSyncNode->pLogStore->syncLogLastIndex(pSyncNode->pLogStore);
@@ -2259,11 +2285,17 @@ int32_t syncNodeAssignedLeader2Leader(SSyncNode* pSyncNode) {
 }
 
 // just called by syncNodeVoteForSelf
-// need assert
 void syncNodeVoteForTerm(SSyncNode* pSyncNode, SyncTerm term, SRaftId* pRaftId) {
-  ASSERT(term == raftStoreGetTerm(pSyncNode));
+  SyncTerm storeTerm = raftStoreGetTerm(pSyncNode);
+  if (term != storeTerm) {
+    sError("vgId:%d, failed to vote for term, term:%" PRId64 ", storeTerm:%" PRId64, pSyncNode->vgId, term, storeTerm);
+    return;
+  }
   bool voted = raftStoreHasVoted(pSyncNode);
-  ASSERT(!voted);
+  if (voted) {
+    sError("vgId:%d, failed to vote for term since not voted", pSyncNode->vgId);
+    return;
+  }
 
   raftStoreVote(pSyncNode, pRaftId);
 }
@@ -2407,7 +2439,7 @@ SyncTerm syncNodeGetPreTerm(SSyncNode* pSyncNode, SyncIndex index) {
                         .lastConfigIndex = SYNC_INDEX_INVALID};
 
   if (code == 0) {
-    ASSERT(pPreEntry != NULL);
+    if (pPreEntry == NULL) return -1;
     preTerm = pPreEntry->term;
 
     if (h) {
@@ -3238,7 +3270,6 @@ int32_t syncNodeAppend(SSyncNode* ths, SSyncRaftEntry* pEntry) {
   // append to log buffer
   if ((code = syncLogBufferAppend(ths->pLogBuf, ths, pEntry)) < 0) {
     sError("vgId:%d, failed to enqueue sync log buffer, index:%" PRId64, ths->vgId, pEntry->index);
-    ASSERT(terrno != 0);
     (void)syncFsmExecute(ths, ths->pFsm, ths->state, raftStoreGetTerm(ths), pEntry, terrno, false);
     syncEntryDestroy(pEntry);
     goto _out;
@@ -3347,7 +3378,7 @@ static int32_t syncNodeAppendNoopOld(SSyncNode* ths) {
   SyncIndex       index = ths->pLogStore->syncLogWriteIndex(ths->pLogStore);
   SyncTerm        term = raftStoreGetTerm(ths);
   SSyncRaftEntry* pEntry = syncEntryBuildNoop(term, index, ths->vgId);
-  ASSERT(pEntry != NULL);
+  if (pEntry == NULL) return -1;
 
   LRUHandle* h = NULL;
 
diff --git a/source/libs/sync/src/syncPipeline.c b/source/libs/sync/src/syncPipeline.c
index 5e6204dde8..a6e9c7de32 100644
--- a/source/libs/sync/src/syncPipeline.c
+++ b/source/libs/sync/src/syncPipeline.c
@@ -682,12 +682,18 @@ int32_t syncFsmExecute(SSyncNode* pNode, SSyncFSM* pFsm, ESyncState role, SyncTe
   int32_t code = 0, lino = 0;
   bool    retry = false;
   do {
+    SFsmCbMeta cbMeta = {0};
+    cbMeta.lastConfigIndex = syncNodeGetSnapshotConfigIndex(pNode, pEntry->index);
+    if (cbMeta.lastConfigIndex < -1) {
+      code = TSDB_CODE_SYN_INTERNAL_ERROR;
+      if (terrno != 0) code = terrno;
+      return code;
+    }
+
     SRpcMsg rpcMsg = {.code = applyCode};
     TAOS_CHECK_EXIT(syncEntry2OriginalRpc(pEntry, &rpcMsg));
 
-    SFsmCbMeta cbMeta = {0};
     cbMeta.index = pEntry->index;
-    cbMeta.lastConfigIndex = syncNodeGetSnapshotConfigIndex(pNode, pEntry->index);
     cbMeta.isWeak = pEntry->isWeak;
     cbMeta.code = applyCode;
     cbMeta.state = role;