diff --git a/source/dnode/vnode/src/vnd/vnodeSync.c b/source/dnode/vnode/src/vnd/vnodeSync.c
index feecbc6d3bd6c416c9cc436213b344f5c099abe1..c67ee41b1228cc47946ac0a7e9f574b7b13d893b 100644
--- a/source/dnode/vnode/src/vnd/vnodeSync.c
+++ b/source/dnode/vnode/src/vnd/vnodeSync.c
@@ -415,7 +415,7 @@ static void vnodeRestoreFinish(const SSyncFSM *pFsm) {
   walApplyVer(pVnode->pWal, pVnode->state.applied);
 
   pVnode->restored = true;
-  vDebug("vgId:%d, sync restore finished", pVnode->config.vgId);
+  vInfo("vgId:%d, sync restore finished", pVnode->config.vgId);
 }
 
 static void vnodeBecomeFollower(const SSyncFSM *pFsm) {
diff --git a/source/libs/sync/inc/syncCommit.h b/source/libs/sync/inc/syncCommit.h
index d3ba556f829b712a441d1132fa108fe9c1524fdb..7d638a7336e387cfbf69f7ec43c841310d127c16 100644
--- a/source/libs/sync/inc/syncCommit.h
+++ b/source/libs/sync/inc/syncCommit.h
@@ -47,8 +47,13 @@ extern "C" {
 //
 void syncOneReplicaAdvance(SSyncNode* pSyncNode);
 void syncMaybeAdvanceCommitIndex(SSyncNode* pSyncNode);
+
 bool syncAgreeIndex(SSyncNode* pSyncNode, SRaftId* pRaftId, SyncIndex index);
 bool syncAgree(SSyncNode* pSyncNode, SyncIndex index);
+bool syncNodeAgreedUpon(SSyncNode* pNode, SyncIndex index);
+
+int64_t syncNodeUpdateCommitIndex(SSyncNode* ths, SyncIndex commitIndex);
+int64_t syncNodeCheckCommitIndex(SSyncNode* ths, SyncIndex indexLikely);
 
 #ifdef __cplusplus
 }
diff --git a/source/libs/sync/inc/syncLogBuffer.h b/source/libs/sync/inc/syncLogBuffer.h
index 4c209549b49684625417cd55a3aef32f44e58212..39b4439d62df85311f7f98bb2677b4da5a708c0e 100644
--- a/source/libs/sync/inc/syncLogBuffer.h
+++ b/source/libs/sync/inc/syncLogBuffer.h
@@ -41,8 +41,28 @@ typedef struct SSyncLogReplMgr {
   int32_t       peerId;
 } SSyncLogReplMgr;
 
+typedef struct SSyncLogBufEntry {
+  SSyncRaftEntry* pItem;
+  SyncIndex       prevLogIndex;
+  SyncTerm        prevLogTerm;
+} SSyncLogBufEntry;
+
+typedef struct SSyncLogBuffer {
+  SSyncLogBufEntry entries[TSDB_SYNC_LOG_BUFFER_SIZE];
+  int64_t          startIndex;
+  int64_t          commitIndex;
+  int64_t          matchIndex;
+  int64_t          endIndex;
+  int64_t          size;
+  TdThreadMutex    mutex;
+} SSyncLogBuffer;
+
+// SSyncLogRepMgr
+
 SSyncLogReplMgr* syncLogReplMgrCreate();
 void             syncLogReplMgrDestroy(SSyncLogReplMgr* pMgr);
+int32_t          syncLogReplMgrReset(SSyncLogReplMgr* pMgr);
+
 int32_t          syncNodeLogReplMgrInit(SSyncNode* pNode);
 void             syncNodeLogReplMgrDestroy(SSyncNode* pNode);
 
@@ -69,35 +89,12 @@ int32_t  syncLogReplMgrProcessReply(SSyncLogReplMgr* pMgr, SSyncNode* pNode, Syn
 int32_t  syncLogBufferReplicateOnce(SSyncLogReplMgr* pMgr, SSyncNode* pNode);
 int32_t  syncLogReplMgrReplicateAttemptedOnce(SSyncLogReplMgr* pMgr, SSyncNode* pNode);
 int32_t  syncLogReplMgrReplicateProbeOnce(SSyncLogReplMgr* pMgr, SSyncNode* pNode);
-int32_t  syncLogResetLogReplMgr(SSyncLogReplMgr* pMgr);
 int32_t syncLogReplMgrProcessReplyInRecoveryMode(SSyncLogReplMgr* pMgr, SSyncNode* pNode, SyncAppendEntriesReply* pMsg);
 int32_t syncLogReplMgrProcessReplyInNormalMode(SSyncLogReplMgr* pMgr, SSyncNode* pNode, SyncAppendEntriesReply* pMsg);
 int32_t syncLogReplMgrRetryOnNeed(SSyncLogReplMgr* pMgr, SSyncNode* pNode);
 int32_t syncLogReplMgrProcessHeartbeatReply(SSyncLogReplMgr* pMgr, SSyncNode* pNode, SyncHeartbeatReply* pMsg);
 
-int32_t syncNodeSendAppendEntries(SSyncNode* pNode, const SRaftId* destRaftId, SRpcMsg* pRpcMsg);
-int32_t syncNodeMaybeSendAppendEntries(SSyncNode* pNode, const SRaftId* destRaftId, SRpcMsg* pRpcMsg);
-void    syncLogDestroyAppendEntries(SRpcMsg* pRpcMsg);
-
-// others
-bool syncLogReplMgrValidate(SSyncLogReplMgr* pMgr);
-
-typedef struct SSyncLogBufEntry {
-  SSyncRaftEntry* pItem;
-  SyncIndex       prevLogIndex;
-  SyncTerm        prevLogTerm;
-} SSyncLogBufEntry;
-
-typedef struct SSyncLogBuffer {
-  SSyncLogBufEntry entries[TSDB_SYNC_LOG_BUFFER_SIZE];
-  int64_t          startIndex;
-  int64_t          commitIndex;
-  int64_t          matchIndex;
-  int64_t          endIndex;
-  int64_t          size;
-  TdThreadMutex    mutex;
-} SSyncLogBuffer;
-
+// SSyncLogBuffer
 SSyncLogBuffer* syncLogBufferCreate();
 void            syncLogBufferDestroy(SSyncLogBuffer* pBuf);
 int32_t         syncLogBufferInit(SSyncLogBuffer* pBuf, SSyncNode* pNode);
@@ -117,8 +114,6 @@ int32_t         syncLogBufferRollback(SSyncLogBuffer* pBuf, SyncIndex toIndex);
 int32_t syncLogBufferReplicate(SSyncLogBuffer* pBuf, SSyncNode* pNode, SSyncRaftEntry* pEntry, SyncTerm prevLogTerm);
 
 // others
-bool    syncNodeAgreedUpon(SSyncNode* pNode, SyncIndex index);
-void    syncIndexMgrSetIndex(SSyncIndexMgr* pSyncIndexMgr, const SRaftId* pRaftId, SyncIndex index);
 int64_t syncNodeUpdateCommitIndex(SSyncNode* ths, SyncIndex commtIndex);
 int32_t syncLogToAppendEntries(SSyncNode* pNode, SSyncRaftEntry* pEntry, SyncTerm prevLogTerm, SRpcMsg* pRpcMsg);
 
diff --git a/source/libs/sync/inc/syncReplication.h b/source/libs/sync/inc/syncReplication.h
index 7da610a9edf626ea6de28234ad206ab1c712ec86..f077306475908698bfb8673445b070609364cb44 100644
--- a/source/libs/sync/inc/syncReplication.h
+++ b/source/libs/sync/inc/syncReplication.h
@@ -53,6 +53,9 @@ int32_t syncNodeSendHeartbeat(SSyncNode* pSyncNode, const SRaftId* pDestId, SRpc
 int32_t syncNodeReplicate(SSyncNode* pSyncNode);
 int32_t syncNodeReplicateOne(SSyncNode* pSyncNode, SRaftId* pDestId, bool snapshot);
 
+int32_t syncNodeSendAppendEntries(SSyncNode* pNode, const SRaftId* destRaftId, SRpcMsg* pRpcMsg);
+int32_t syncNodeMaybeSendAppendEntries(SSyncNode* pNode, const SRaftId* destRaftId, SRpcMsg* pRpcMsg);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/source/libs/sync/inc/syncSnapshot.h b/source/libs/sync/inc/syncSnapshot.h
index 7b8e768391d82e5545a3d191785cff54dc405220..1f9675a3cd41835ea1f6ca20f5a6b21540cd317e 100644
--- a/source/libs/sync/inc/syncSnapshot.h
+++ b/source/libs/sync/inc/syncSnapshot.h
@@ -87,6 +87,8 @@ void                   snapshotReceiverForceStop(SSyncSnapshotReceiver *pReceive
 int32_t syncNodeOnSnapshot(SSyncNode *ths, const SRpcMsg *pMsg);
 int32_t syncNodeOnSnapshotReply(SSyncNode *ths, const SRpcMsg *pMsg);
 
+SyncIndex syncNodeGetSnapshotConfigIndex(SSyncNode *pSyncNode, SyncIndex snapshotLastApplyIndex);
+
 // start
 
 #ifdef __cplusplus
diff --git a/source/libs/sync/src/syncAppendEntriesReply.c b/source/libs/sync/src/syncAppendEntriesReply.c
index 36eb6fefc7582c3c9ae8d8e3d7cbdce2e4d7c73a..234e8bffeb26f50b816d738d5a40c20aaa77a080 100644
--- a/source/libs/sync/src/syncAppendEntriesReply.c
+++ b/source/libs/sync/src/syncAppendEntriesReply.c
@@ -39,24 +39,6 @@
 //    /\ UNCHANGED <<serverVars, candidateVars, logVars, elections>>
 //
 
-int64_t syncNodeUpdateCommitIndex(SSyncNode* ths, SyncIndex commitIndex) {
-  SyncIndex lastVer = ths->pLogStore->syncLogLastIndex(ths->pLogStore);
-  commitIndex = TMAX(commitIndex, ths->commitIndex);
-  ths->commitIndex = TMIN(commitIndex, lastVer);
-  ths->pLogStore->syncLogUpdateCommitIndex(ths->pLogStore, ths->commitIndex);
-  return ths->commitIndex;
-}
-
-int64_t syncNodeCheckCommitIndex(SSyncNode* ths, SyncIndex indexLikely) {
-  if (indexLikely > ths->commitIndex && syncNodeAgreedUpon(ths, indexLikely)) {
-    SyncIndex commitIndex = indexLikely;
-    syncNodeUpdateCommitIndex(ths, commitIndex);
-    sInfo("vgId:%d, agreed upon. role:%d, term:%" PRId64 ", index: %" PRId64 "", ths->vgId, ths->state,
-          ths->pRaftStore->currentTerm, commitIndex);
-  }
-  return ths->commitIndex;
-}
-
 int32_t syncNodeOnAppendEntriesReply(SSyncNode* ths, const SRpcMsg* pRpcMsg) {
   SyncAppendEntriesReply* pMsg = pRpcMsg->pCont;
   int32_t ret = 0;
diff --git a/source/libs/sync/src/syncCommit.c b/source/libs/sync/src/syncCommit.c
index 73fc3050eff35114b5c079a7cd39fd9a85d75375..fc7ea7cc30252de30012e7a3e233ee49c76a9571 100644
--- a/source/libs/sync/src/syncCommit.c
+++ b/source/libs/sync/src/syncCommit.c
@@ -311,3 +311,21 @@ bool syncAgree(SSyncNode* pNode, SyncIndex index) {
   }
   return false;
 }
+
+int64_t syncNodeUpdateCommitIndex(SSyncNode* ths, SyncIndex commitIndex) {
+  SyncIndex lastVer = ths->pLogStore->syncLogLastIndex(ths->pLogStore);
+  commitIndex = TMAX(commitIndex, ths->commitIndex);
+  ths->commitIndex = TMIN(commitIndex, lastVer);
+  ths->pLogStore->syncLogUpdateCommitIndex(ths->pLogStore, ths->commitIndex);
+  return ths->commitIndex;
+}
+
+int64_t syncNodeCheckCommitIndex(SSyncNode* ths, SyncIndex indexLikely) {
+  if (indexLikely > ths->commitIndex && syncNodeAgreedUpon(ths, indexLikely)) {
+    SyncIndex commitIndex = indexLikely;
+    syncNodeUpdateCommitIndex(ths, commitIndex);
+    sInfo("vgId:%d, agreed upon. role:%d, term:%" PRId64 ", index: %" PRId64 "", ths->vgId, ths->state,
+          ths->pRaftStore->currentTerm, commitIndex);
+  }
+  return ths->commitIndex;
+}
diff --git a/source/libs/sync/src/syncLogBuffer.c b/source/libs/sync/src/syncLogBuffer.c
index 36f33fa46ef26e4e197f95539bc8ba2ec176dc71..621bce6683d88d12e73e571c55fb64fb4bade49e 100644
--- a/source/libs/sync/src/syncLogBuffer.c
+++ b/source/libs/sync/src/syncLogBuffer.c
@@ -16,10 +16,13 @@
 #define _DEFAULT_SOURCE
 
 #include "syncLogBuffer.h"
+#include "syncIndexMgr.h"
 #include "syncInt.h"
 #include "syncRaftEntry.h"
 #include "syncRaftStore.h"
 #include "syncReplication.h"
+#include "syncRespMgr.h"
+#include "syncSnapshot.h"
 #include "syncUtil.h"
 
 int64_t syncLogBufferGetEndIndex(SSyncLogBuffer* pBuf) {
@@ -384,7 +387,7 @@ _out:
   return matchIndex;
 }
 
-int32_t syncLogFsmExecute(SSyncFSM* pFsm, ESyncState role, SyncTerm term, SSyncRaftEntry* pEntry) {
+int32_t syncLogFsmExecute(SSyncNode* pNode, SSyncFSM* pFsm, ESyncState role, SyncTerm term, SSyncRaftEntry* pEntry) {
   ASSERT(pFsm->FpCommitCb != NULL && "No commit cb registered for the FSM");
 
   SRpcMsg rpcMsg;
@@ -392,7 +395,7 @@ int32_t syncLogFsmExecute(SSyncFSM* pFsm, ESyncState role, SyncTerm term, SSyncR
 
   SFsmCbMeta cbMeta = {0};
   cbMeta.index = pEntry->index;
-  cbMeta.lastConfigIndex = -1;
+  cbMeta.lastConfigIndex = syncNodeGetSnapshotConfigIndex(pNode, pEntry->index);
   cbMeta.isWeak = pEntry->isWeak;
   cbMeta.code = 0;
   cbMeta.state = role;
@@ -401,6 +404,7 @@ int32_t syncLogFsmExecute(SSyncFSM* pFsm, ESyncState role, SyncTerm term, SSyncR
   cbMeta.currentTerm = term;
   cbMeta.flag = -1;
 
+  (void)syncRespMgrGetAndDel(pNode->pSyncRespMgr, cbMeta.seqNum, &rpcMsg.info);
   pFsm->FpCommitCb(pFsm, &rpcMsg, &cbMeta);
   return 0;
 }
@@ -423,7 +427,7 @@ int32_t syncLogBufferCommit(SSyncLogBuffer* pBuf, SSyncNode* pNode, int64_t comm
   ESyncState      role = pNode->state;
   SyncTerm        term = pNode->pRaftStore->currentTerm;
   SyncGroupId     vgId = pNode->vgId;
-  int32_t         ret = 0;
+  int32_t         ret = -1;
   int64_t         upperIndex = TMIN(commitIndex, pBuf->matchIndex);
   SSyncRaftEntry* pEntry = NULL;
   bool            inBuf = false;
@@ -459,10 +463,9 @@ int32_t syncLogBufferCommit(SSyncLogBuffer* pBuf, SSyncNode* pNode, int64_t comm
       continue;
     }
 
-    if (syncLogFsmExecute(pFsm, role, term, pEntry) != 0) {
+    if (syncLogFsmExecute(pNode, pFsm, role, term, pEntry) != 0) {
       sError("vgId:%d, failed to execute raft entry in FSM. log index:%" PRId64 ", term:%" PRId64 "", vgId,
              pEntry->index, pEntry->term);
-      ret = -1;
       goto _out;
     }
     pBuf->commitIndex = index;
@@ -487,6 +490,7 @@ int32_t syncLogBufferCommit(SSyncLogBuffer* pBuf, SSyncNode* pNode, int64_t comm
     pBuf->startIndex = index + 1;
   }
 
+  ret = 0;
 _out:
   // mark as restored if needed
   if (!pNode->restoreFinish && pBuf->commitIndex >= pNode->commitIndex) {
@@ -505,7 +509,7 @@ _out:
   return ret;
 }
 
-int32_t syncLogResetLogReplMgr(SSyncLogReplMgr* pMgr) {
+int32_t syncLogReplMgrReset(SSyncLogReplMgr* pMgr) {
   ASSERT(pMgr->startIndex >= 0);
   for (SyncIndex index = pMgr->startIndex; index < pMgr->endIndex; index++) {
     memset(&pMgr->states[index % pMgr->size], 0, sizeof(pMgr->states[0]));
@@ -601,7 +605,7 @@ int32_t syncLogReplMgrProcessReplyInRecoveryMode(SSyncLogReplMgr* pMgr, SSyncNod
       return 0;
     }
 
-    (void)syncLogResetLogReplMgr(pMgr);
+    (void)syncLogReplMgrReset(pMgr);
   }
 
   // send match index
@@ -633,7 +637,7 @@ int32_t syncLogReplMgrProcessHeartbeatReply(SSyncLogReplMgr* pMgr, SSyncNode* pN
   if (pMsg->startTime != 0 && pMsg->startTime != pMgr->peerStartTime) {
     sInfo("vgId:%d, reset sync log repl mgr in heartbeat. start time:%" PRId64 ", old start time:%" PRId64 "",
           pNode->vgId, pMsg->startTime, pMgr->peerStartTime);
-    syncLogResetLogReplMgr(pMgr);
+    syncLogReplMgrReset(pMgr);
     pMgr->peerStartTime = pMsg->startTime;
   }
   taosThreadMutexUnlock(&pBuf->mutex);
@@ -647,7 +651,7 @@ int32_t syncLogReplMgrProcessReply(SSyncLogReplMgr* pMgr, SSyncNode* pNode, Sync
     sInfo("vgId:%d, reset sync log repl mgr in append entries reply. start time:%" PRId64 ", old start time:%" PRId64
           "",
           pNode->vgId, pMsg->startTime, pMgr->peerStartTime);
-    syncLogResetLogReplMgr(pMgr);
+    syncLogReplMgrReset(pMgr);
     pMgr->peerStartTime = pMsg->startTime;
   }
 
@@ -861,7 +865,7 @@ int32_t syncLogBufferReset(SSyncLogBuffer* pBuf, SSyncNode* pNode) {
   // reset repl mgr
   for (int i = 0; i < pNode->replicaNum; i++) {
     SSyncLogReplMgr* pMgr = pNode->logReplMgrs[i];
-    syncLogResetLogReplMgr(pMgr);
+    syncLogReplMgrReset(pMgr);
   }
   taosThreadMutexUnlock(&pBuf->mutex);
   return 0;
@@ -884,14 +888,6 @@ SSyncRaftEntry* syncLogBufferGetOneEntry(SSyncLogBuffer* pBuf, SSyncNode* pNode,
   return pEntry;
 }
 
-bool syncLogReplMgrValidate(SSyncLogReplMgr* pMgr) {
-  ASSERT(pMgr->startIndex <= pMgr->endIndex);
-  for (SyncIndex index = pMgr->startIndex; index < pMgr->endIndex; index++) {
-    ASSERT(pMgr->states[(index + pMgr->size) % pMgr->size].barrier == false || index + 1 == pMgr->endIndex);
-  }
-  return true;
-}
-
 int32_t syncLogBufferReplicateOneTo(SSyncLogReplMgr* pMgr, SSyncNode* pNode, SyncIndex index, SyncTerm* pTerm,
                                     SRaftId* pDestId, bool* pBarrier) {
   SSyncRaftEntry* pEntry = NULL;
diff --git a/source/libs/sync/src/syncMain.c b/source/libs/sync/src/syncMain.c
index 33c24bcca88fae9ef95dd40f5e25191cffbf32ca..457ef7eedd5990a61951a0aab89cbd1d8b29ef13 100644
--- a/source/libs/sync/src/syncMain.c
+++ b/source/libs/sync/src/syncMain.c
@@ -58,7 +58,6 @@ static int32_t syncNodeLeaderTransferTo(SSyncNode* pSyncNode, SNodeInfo newLeade
 static int32_t syncDoLeaderTransfer(SSyncNode* ths, SRpcMsg* pRpcMsg, SSyncRaftEntry* pEntry);
 
 static ESyncStrategy syncNodeStrategy(SSyncNode* pSyncNode);
-static SyncIndex     syncNodeGetSnapshotConfigIndex(SSyncNode* pSyncNode, SyncIndex snapshotLastApplyIndex);
 
 int64_t syncOpen(SSyncInfo* pSyncInfo) {
   SSyncNode* pSyncNode = syncNodeOpen(pSyncInfo);
diff --git a/source/libs/transport/src/tmsgcb.c b/source/libs/transport/src/tmsgcb.c
index 2007bc474f266a7bfd6db83dd6620c98796d538a..48f557c1a811023096be030eee7afe6a62428ac1 100644
--- a/source/libs/transport/src/tmsgcb.c
+++ b/source/libs/transport/src/tmsgcb.c
@@ -16,6 +16,7 @@
 #define _DEFAULT_SOURCE
 #include "tmsgcb.h"
 #include "taoserror.h"
+#include "transLog.h"
 #include "trpc.h"
 
 static SMsgCb defaultMsgCb;
@@ -23,9 +24,7 @@ static SMsgCb defaultMsgCb;
 void tmsgSetDefault(const SMsgCb* msgcb) { defaultMsgCb = *msgcb; }
 
 int32_t tmsgPutToQueue(const SMsgCb* msgcb, EQueueType qtype, SRpcMsg* pMsg) {
-  if (msgcb == NULL) {
-    return -1;
-  }
+  ASSERT(msgcb != NULL);
   int32_t code = (*msgcb->putToQueueFp)(msgcb->mgmt, qtype, pMsg);
   if (code != 0) {
     rpcFreeCont(pMsg->pCont);