diff --git a/source/libs/sync/src/syncEnv.c b/source/libs/sync/src/syncEnv.c
index cf0d4d25e85535671aea1d3e2e90303e2e420c7d..3f3b794f46cb5c3b82b7d5476f400b71aa066c8e 100644
--- a/source/libs/sync/src/syncEnv.c
+++ b/source/libs/sync/src/syncEnv.c
@@ -79,7 +79,7 @@ void syncNodeRemove(int64_t rid) { taosRemoveRef(gNodeRefId, rid); }
 SSyncNode *syncNodeAcquire(int64_t rid) {
   SSyncNode *pNode = taosAcquireRef(gNodeRefId, rid);
   if (pNode == NULL) {
-    sTrace("failed to acquire node from refId:%" PRId64, rid);
+    sError("failed to acquire node from refId:%" PRId64, rid);
     terrno = TSDB_CODE_SYN_INTERNAL_ERROR;
   }
 
diff --git a/source/libs/sync/src/syncMain.c b/source/libs/sync/src/syncMain.c
index 38cc9f3dfedc061f7c2f620ee2af3504ee1eb783..64d79b060cf44be52394fdabfd7869caafa12792 100644
--- a/source/libs/sync/src/syncMain.c
+++ b/source/libs/sync/src/syncMain.c
@@ -256,6 +256,7 @@ int32_t syncBeginSnapshot(int64_t rid, int64_t lastApplyIndex) {
   SSyncNode* pSyncNode = syncNodeAcquire(rid);
   if (pSyncNode == NULL) {
     terrno = TSDB_CODE_SYN_INTERNAL_ERROR;
+    sError("sync begin snapshot error");
     return -1;
   }
   ASSERT(rid == pSyncNode->rid);
@@ -394,6 +395,7 @@ int32_t syncEndSnapshot(int64_t rid) {
   SSyncNode* pSyncNode = syncNodeAcquire(rid);
   if (pSyncNode == NULL) {
     terrno = TSDB_CODE_SYN_INTERNAL_ERROR;
+    sError("sync end snapshot error");
     return -1;
   }
   ASSERT(rid == pSyncNode->rid);
@@ -427,6 +429,7 @@ int32_t syncStepDown(int64_t rid, SyncTerm newTerm) {
   SSyncNode* pSyncNode = syncNodeAcquire(rid);
   if (pSyncNode == NULL) {
     terrno = TSDB_CODE_SYN_INTERNAL_ERROR;
+    sError("sync step down error");
     return -1;
   }
   ASSERT(rid == pSyncNode->rid);
@@ -441,6 +444,7 @@ bool syncIsReadyForRead(int64_t rid) {
   SSyncNode* pSyncNode = syncNodeAcquire(rid);
   if (pSyncNode == NULL) {
     terrno = TSDB_CODE_SYN_INTERNAL_ERROR;
+    sError("sync ready for read error");
     return false;
   }
   ASSERT(rid == pSyncNode->rid);
@@ -786,6 +790,7 @@ int32_t syncPropose(int64_t rid, SRpcMsg* pMsg, bool isWeak) {
   if (pSyncNode == NULL) {
     syncNodeRelease(pSyncNode);
     terrno = TSDB_CODE_SYN_INTERNAL_ERROR;
+    sError("sync propose error");
     return -1;
   }
   ASSERT(rid == pSyncNode->rid);
@@ -3004,9 +3009,19 @@ int32_t syncNodeOnClientRequest(SSyncNode* ths, SyncClientRequest* pMsg, SyncInd
     // append entry
     code = ths->pLogStore->syncLogAppendEntry(ths->pLogStore, pEntry);
     if (code != 0) {
-      // del resp mgr, call FpCommitCb
-      ASSERT(0);
-      return -1;
+      if (ths->replicaNum == 1) {
+        if (h) {
+          taosLRUCacheRelease(ths->pLogStore->pCache, h, false);
+        } else {
+          syncEntryDestory(pEntry);
+        }
+        return -1;
+
+      } else {
+        // del resp mgr, call FpCommitCb
+        ASSERT(0);
+        return -1;
+      }
     }
 
     // if mulit replica, start replicate right now
diff --git a/source/libs/sync/src/syncRaftLog.c b/source/libs/sync/src/syncRaftLog.c
index 04228d4759b6465791584f4a7d790d114622c2a0..39b2d69947193b8b45999d84bf9435c81edb1817 100644
--- a/source/libs/sync/src/syncRaftLog.c
+++ b/source/libs/sync/src/syncRaftLog.c
@@ -248,6 +248,8 @@ static int32_t raftLogGetEntry(struct SSyncLogStore* pLogStore, SyncIndex index,
   SWalReader* pWalHandle = pData->pWalHandle;
   if (pWalHandle == NULL) {
     terrno = TSDB_CODE_SYN_INTERNAL_ERROR;
+    sError("vgId:%d, wal handle is NULL", pData->pSyncNode->vgId);
+
     return -1;
   }