diff --git a/src/inc/taoserror.h b/src/inc/taoserror.h
index 6139d4bf49..fc433463c5 100644
--- a/src/inc/taoserror.h
+++ b/src/inc/taoserror.h
@@ -180,7 +180,9 @@ TAOS_DEFINE_ERROR(TSDB_CODE_VND_NO_DISK_PERMISSIONS,      0, 0x0506, "vnode no d
 TAOS_DEFINE_ERROR(TSDB_CODE_VND_NO_SUCH_FILE_OR_DIR,      0, 0x0507, "vnode no such file or directory")
 TAOS_DEFINE_ERROR(TSDB_CODE_VND_OUT_OF_MEMORY,            0, 0x0508, "vnode out of memory")
 TAOS_DEFINE_ERROR(TSDB_CODE_VND_APP_ERROR,                0, 0x0509, "vnode app error")
-TAOS_DEFINE_ERROR(TSDB_CODE_VND_NO_WRITE_AUTH,            0, 0x0214, "vnode no write auth")
+TAOS_DEFINE_ERROR(TSDB_CODE_VND_INVALID_STATUS,           0, 0x0510, "vnode not in ready state")
+TAOS_DEFINE_ERROR(TSDB_CODE_VND_NOT_SYNCED,               0, 0x0511, "vnode not in synced state")
+TAOS_DEFINE_ERROR(TSDB_CODE_VND_NO_WRITE_AUTH,            0, 0x0512, "vnode no write auth")
 
 // tsdb
 TAOS_DEFINE_ERROR(TSDB_CODE_TDB_INVALID_TABLE_ID,         0, 0x0600, "tsdb invalid table id")
diff --git a/src/rpc/src/rpcMain.c b/src/rpc/src/rpcMain.c
index d14a98ab30..e432e47e36 100644
--- a/src/rpc/src/rpcMain.c
+++ b/src/rpc/src/rpcMain.c
@@ -603,7 +603,10 @@ static void rpcReleaseConn(SRpcConn *pConn) {
     rpcFreeMsg(pConn->pRspMsg); // it may have a response msg saved, but not request msg
     pConn->pRspMsg = NULL;
     if (pConn->pReqMsg) rpcFreeCont(pConn->pReqMsg);
-  } 
+  } else {
+    if (pConn->outType && pConn->pReqMsg) 
+      rpcFreeCont(pConn->pReqMsg);
+  }
 
   // memset could not be used, since lockeBy can not be reset
   pConn->inType = 0;
diff --git a/src/vnode/src/vnodeMain.c b/src/vnode/src/vnodeMain.c
index b469a5836e..0ee4ef4837 100644
--- a/src/vnode/src/vnodeMain.c
+++ b/src/vnode/src/vnodeMain.c
@@ -160,6 +160,13 @@ int32_t vnodeDrop(int32_t vgId) {
 
 int32_t vnodeAlter(void *param, SMDCreateVnodeMsg *pVnodeCfg) {
   SVnodeObj *pVnode = param;
+
+  if (pVnode->status != TAOS_VN_STATUS_READY) 
+    return TSDB_CODE_VND_INVALID_STATUS;
+
+  if (pVnode->syncCfg.replica > 1 && pVnode->role == TAOS_SYNC_ROLE_UNSYNCED) 
+    return TSDB_CODE_VND_NOT_SYNCED;
+
   pVnode->status = TAOS_VN_STATUS_UPDATING;
 
   int32_t code = vnodeSaveCfg(pVnodeCfg);
@@ -408,8 +415,11 @@ void *vnodeGetWal(void *pVnode) {
 }
 
 static void vnodeBuildVloadMsg(SVnodeObj *pVnode, SDMStatusMsg *pStatus) {
-  if (pVnode->status == TAOS_VN_STATUS_DELETING) return;
+  if (pVnode->status != TAOS_VN_STATUS_READY) return;
   if (pStatus->openVnodes >= TSDB_MAX_VNODES) return;
+  if (pVnode->syncCfg.replica > 1 && pVnode->role == TAOS_SYNC_ROLE_UNSYNCED) return;
+  if (pVnode->tsdb == NULL) return;
+
   int64_t totalStorage, compStorage, pointsWritten = 0;
   tsdbReportStat(pVnode->tsdb, &pointsWritten, &totalStorage, &compStorage);
 
diff --git a/src/vnode/src/vnodeRead.c b/src/vnode/src/vnodeRead.c
index 9938b34741..cbce3f6cf2 100644
--- a/src/vnode/src/vnodeRead.c
+++ b/src/vnode/src/vnodeRead.c
@@ -46,9 +46,9 @@ int32_t vnodeProcessRead(void *param, SReadMsg *pReadMsg) {
     return TSDB_CODE_VND_MSG_NOT_PROCESSED;
   }
 
-  if (pVnode->status == TAOS_VN_STATUS_DELETING || pVnode->status == TAOS_VN_STATUS_CLOSING) {
+  if (pVnode->status != TAOS_VN_STATUS_READY) {
     vDebug("vgId:%d, msgType:%s not processed, vnode status is %d", pVnode->vgId, taosMsg[msgType], pVnode->status);
-    return TSDB_CODE_VND_INVALID_VGROUP_ID; 
+    return TSDB_CODE_VND_INVALID_STATUS; 
   }
 
   // TODO: Later, let slave to support query
@@ -225,4 +225,4 @@ int32_t vnodeNotifyCurrentQhandle(void* handle, void* qhandle, int32_t vgId) {
 
   vDebug("QInfo:%p register qhandle to connect:%p", qhandle, handle);
   return rpcReportProgress(handle, (char*) killQueryMsg, sizeof(SRetrieveTableMsg));
-}
\ No newline at end of file
+}
diff --git a/src/vnode/src/vnodeWrite.c b/src/vnode/src/vnodeWrite.c
index 182516d678..dad079c4b8 100644
--- a/src/vnode/src/vnodeWrite.c
+++ b/src/vnode/src/vnodeWrite.c
@@ -58,7 +58,7 @@ int32_t vnodeProcessWrite(void *param1, int qtype, void *param2, void *item) {
 
   if (pHead->version == 0) { // from client or CQ 
     if (pVnode->status != TAOS_VN_STATUS_READY) 
-      return TSDB_CODE_VND_INVALID_VGROUP_ID;  // it may be in deleting or closing state
+      return TSDB_CODE_VND_INVALID_STATUS;  // it may be in deleting or closing state
 
     if (pVnode->syncCfg.replica > 1 && pVnode->role != TAOS_SYNC_ROLE_MASTER)
       return TSDB_CODE_RPC_NOT_READY;