diff --git a/source/dnode/mnode/impl/src/mndSync.c b/source/dnode/mnode/impl/src/mndSync.c
index d8eb021462565ad09a7f0211ad92ba7b2bc24827..df289aa28508436d3a017eefb7a198a922ceaad1 100644
--- a/source/dnode/mnode/impl/src/mndSync.c
+++ b/source/dnode/mnode/impl/src/mndSync.c
@@ -46,9 +46,8 @@ static void mndCloseWal(SMnode *pMnode) {
 }
 
 static int32_t mndRestoreWal(SMnode *pMnode) {
-
-// do nothing
-return 0;
+  // do nothing
+  return 0;
 
 #if 0
 
@@ -122,7 +121,6 @@ _OVER:
   return code;
 
 #endif
-
 }
 
 int32_t mndSyncEqMsg(const SMsgCb *msgcb, SRpcMsg *pMsg) { return tmsgPutToQueue(msgcb, SYNC_QUEUE, pMsg); }
@@ -132,7 +130,7 @@ int32_t mndSyncSendMsg(const SEpSet *pEpSet, SRpcMsg *pMsg) { return tmsgSendReq
 void mndSyncCommitMsg(struct SSyncFSM *pFsm, const SRpcMsg *pMsg, SFsmCbMeta cbMeta) {
   SyncIndex beginIndex = SYNC_INDEX_INVALID;
   if (pFsm->FpGetSnapshot != NULL) {
-    SSnapshot snapshot;
+    SSnapshot snapshot = {0};
     pFsm->FpGetSnapshot(pFsm, &snapshot);
     beginIndex = snapshot.lastApplyIndex;
   }
@@ -141,8 +139,9 @@ void mndSyncCommitMsg(struct SSyncFSM *pFsm, const SRpcMsg *pMsg, SFsmCbMeta cbM
     SMnode    *pMnode = pFsm->data;
     SSyncMgmt *pMgmt = &pMnode->syncMgmt;
 
-    mndProcessApplyMsg((SRpcMsg*)pMsg);
-    //mmPutNodeMsgToApplyQueue(pMnode->pWrapper->pMgmt, pMsg);
+    SRpcMsg *pApplyMsg = (SRpcMsg *)pMsg;
+    pApplyMsg->info.node = pFsm->data;
+    mndProcessApplyMsg(pApplyMsg);
 
     if (cbMeta.state == TAOS_SYNC_STATE_LEADER) {
       tsem_post(&pMgmt->syncSem);
@@ -182,19 +181,16 @@ int32_t mndInitSync(SMnode *pMnode) {
     return -1;
   }
 
-  if (pMnode->selfId == 1) {
-    pMgmt->state = TAOS_SYNC_STATE_LEADER;
-  }
-
   SSyncInfo syncInfo = {.vgId = 1};
   SSyncCfg *pCfg = &(syncInfo.syncCfg);
   pCfg->replicaNum = pMnode->replica;
   pCfg->myIndex = pMnode->selfIndex;
-  for (int i = 0; i < pMnode->replica; ++i) {
-    snprintf((pCfg->nodeInfo)->nodeFqdn, sizeof((pCfg->nodeInfo)->nodeFqdn), "%s", (pMnode->replicas)[i].fqdn);
-    (pCfg->nodeInfo)->nodePort = (pMnode->replicas)[i].port;
+  for (int32_t i = 0; i < pMnode->replica; ++i) {
+    SNodeInfo *pNodeInfo = &pCfg->nodeInfo[i];
+    tstrncpy(pNodeInfo->nodeFqdn, pMnode->replicas[i].fqdn, sizeof(pNodeInfo->nodeFqdn));
+    pNodeInfo->nodePort = pMnode->replicas[i].port;
   }
-  snprintf(syncInfo.path, sizeof(syncInfo.path), "%s/sync", pMnode->path);
+  snprintf(syncInfo.path, sizeof(syncInfo.path), "%s%ssync", pMnode->path, TD_DIRSEP);
   syncInfo.pWal = pMnode->syncMgmt.pWal;
   syncInfo.pFsm = mndSyncMakeFsm(pMnode);
   syncInfo.FpSendMsg = mndSyncSendMsg;
@@ -242,31 +238,38 @@ int32_t mndSyncPropose(SMnode *pMnode, SSdbRaw *pRaw) {
 
 #else
 
-  if (pMnode->replica == 1) return 0;
-
   SSyncMgmt *pMgmt = &pMnode->syncMgmt;
   pMgmt->errCode = 0;
 
-  //SSyncBuffer buf = {.data = pRaw, .len = sdbGetRawTotalSize(pRaw)};
-
-  SRpcMsg rpcMsg;
-  rpcMsg.code = TDMT_MND_APPLY_MSG;
-  rpcMsg.contLen = sdbGetRawTotalSize(pRaw);
-  rpcMsg.pCont = rpcMallocCont(rpcMsg.contLen);
-  memcpy(rpcMsg.pCont, pRaw, rpcMsg.contLen);
+  SRpcMsg rsp = {0};
+  rsp.code = TDMT_MND_APPLY_MSG;
+  rsp.contLen = sdbGetRawTotalSize(pRaw);
+  rsp.pCont = rpcMallocCont(rsp.contLen);
+  memcpy(rsp.pCont, pRaw, rsp.contLen);
 
   bool    isWeak = false;
-  int32_t code = syncPropose(pMgmt->sync, &rpcMsg, isWeak);
+  int32_t code = syncPropose(pMgmt->sync, &rsp, isWeak);
+  if (code == 0) {
+    tsem_wait(&pMgmt->syncSem);
+  } else if (code == TAOS_SYNC_PROPOSE_NOT_LEADER) {
+    terrno = TSDB_CODE_APP_NOT_READY;
+    mError("failed to propose raw:%p since not leader", pRaw);
+    return -1;
+  } else if (code == TAOS_SYNC_PROPOSE_OTHER_ERROR) {
+    terrno = TSDB_CODE_SYN_INTERNAL_ERROR;
+    mError("failed to propose raw:%p since sync internal error", pRaw);
+  } else {
+    assert(0);
+  }
 
   if (code != 0) return code;
-
   tsem_wait(&pMgmt->syncSem);
   return pMgmt->errCode;
 #endif
-
 }
 
 bool mndIsMaster(SMnode *pMnode) {
   SSyncMgmt *pMgmt = &pMnode->syncMgmt;
+  pMgmt->state = syncGetMyRole(pMgmt->sync);
   return pMgmt->state == TAOS_SYNC_STATE_LEADER;
 }
diff --git a/source/dnode/mnode/impl/src/mnode.c b/source/dnode/mnode/impl/src/mnode.c
index 297174beb7b9ab1535d301e6e12f7ee7f4cd2bb0..9a68e0e1f09ccfd643d3794b24a04cbc115d61c1 100644
--- a/source/dnode/mnode/impl/src/mnode.c
+++ b/source/dnode/mnode/impl/src/mnode.c
@@ -336,8 +336,9 @@ int32_t mndAlter(SMnode *pMnode, const SMnodeOpt *pOption) {
   return 0;
 }
 
-int32_t mndStart(SMnode *pMnode) { 
-  syncStart(pMnode->syncMgmt.sync); 
+int32_t mndStart(SMnode *pMnode) {
+  syncSetMsgCb(pMnode->syncMgmt.sync, &pMnode->msgCb);
+  syncStart(pMnode->syncMgmt.sync);
   return mndInitTimer(pMnode);
 }
 
diff --git a/source/dnode/mnode/sdb/src/sdb.c b/source/dnode/mnode/sdb/src/sdb.c
index 1f11a77e6c7575a8f602bb4720b0445b5c5c0372..6e5dde57a6ddb1f45c60a65542e6ea282836d94c 100644
--- a/source/dnode/mnode/sdb/src/sdb.c
+++ b/source/dnode/mnode/sdb/src/sdb.c
@@ -31,11 +31,9 @@ SSdb *sdbInit(SSdbOpt *pOption) {
   char path[PATH_MAX + 100] = {0};
   snprintf(path, sizeof(path), "%s%sdata", pOption->path, TD_DIRSEP);
   pSdb->currDir = strdup(path);
-  snprintf(path, sizeof(path), "%s%ssync", pOption->path, TD_DIRSEP);
-  pSdb->syncDir = strdup(path);
   snprintf(path, sizeof(path), "%s%stmp", pOption->path, TD_DIRSEP);
   pSdb->tmpDir = strdup(path);
-  if (pSdb->currDir == NULL || pSdb->currDir == NULL || pSdb->currDir == NULL) {
+  if (pSdb->currDir == NULL || pSdb->tmpDir == NULL) {
     sdbCleanup(pSdb);
     terrno = TSDB_CODE_OUT_OF_MEMORY;
     mError("failed to init sdb since %s", terrstr());
@@ -149,12 +147,6 @@ static int32_t sdbCreateDir(SSdb *pSdb) {
     return -1;
   }
 
-  if (taosMkDir(pSdb->syncDir) != 0) {
-    terrno = TAOS_SYSTEM_ERROR(errno);
-    mError("failed to create dir:%s since %s", pSdb->syncDir, terrstr());
-    return -1;
-  }
-
   if (taosMkDir(pSdb->tmpDir) != 0) {
     terrno = TAOS_SYSTEM_ERROR(errno);
     mError("failed to create dir:%s since %s", pSdb->tmpDir, terrstr());