diff --git a/include/libs/catalog/catalog.h b/include/libs/catalog/catalog.h
index 391689882962ca84dbaf5a9c4811094a0ea36ce7..e39236ea76570601d94c35827cd2f0d42a29f3fb 100644
--- a/include/libs/catalog/catalog.h
+++ b/include/libs/catalog/catalog.h
@@ -50,6 +50,7 @@ typedef struct SCatalogCfg {
   uint32_t maxDBCacheNum;
 } SCatalogCfg;
 
+
 int32_t catalogInit(SCatalogCfg *cfg);
 
 /**
@@ -87,15 +88,28 @@ int32_t catalogUpdateDBVgroup(struct SCatalog* pCatalog, const char* dbName, SDB
  */
 int32_t catalogGetTableMeta(struct SCatalog* pCatalog, void * pTransporter, const SEpSet* pMgmtEps, const SName* pTableName, STableMeta** pTableMeta);
 
+/**
+ * Get a super table's meta data. 
+ * @param pCatalog (input, got with catalogGetHandle)
+ * @param pTransporter (input, rpc object)
+ * @param pMgmtEps (input, mnode EPs)
+ * @param pTableName (input, table name, NOT including db name)
+ * @param pTableMeta(output, table meta data, NEED to free it by calller)
+ * @return error code
+ */
+int32_t catalogGetSTableMeta(struct SCatalog* pCatalog, void * pTransporter, const SEpSet* pMgmtEps, const SName* pTableName, STableMeta** pTableMeta);
+
+
 /**
  * Force renew a table's local cached meta data. 
  * @param pCatalog (input, got with catalogGetHandle)
  * @param pTransporter (input, rpc object)
  * @param pMgmtEps (input, mnode EPs)
  * @param pTableName (input, table name, NOT including db name)
+ * @param isSTable (input, is super table or not, 1:supposed to be stable, 0: supposed not to be stable, -1:not sure)
  * @return error code
  */
-int32_t catalogRenewTableMeta(struct SCatalog* pCatalog, void * pTransporter, const SEpSet* pMgmtEps, const SName* pTableName);
+int32_t catalogRenewTableMeta(struct SCatalog* pCatalog, void * pTransporter, const SEpSet* pMgmtEps, const SName* pTableName, int32_t isSTable);
 
 /**
  * Force renew a table's local cached meta data and get the new one. 
@@ -104,9 +118,10 @@ int32_t catalogRenewTableMeta(struct SCatalog* pCatalog, void * pTransporter, co
  * @param pMgmtEps (input, mnode EPs)
  * @param pTableName (input, table name, NOT including db name)
  * @param pTableMeta(output, table meta data, NEED to free it by calller) 
+ * @param isSTable (input, is super table or not, 1:supposed to be stable, 0: supposed not to be stable, -1:not sure)
  * @return error code
  */
-int32_t catalogRenewAndGetTableMeta(struct SCatalog* pCatalog, void *pTransporter, const SEpSet* pMgmtEps, const SName* pTableName, STableMeta** pTableMeta);
+int32_t catalogRenewAndGetTableMeta(struct SCatalog* pCatalog, void *pTransporter, const SEpSet* pMgmtEps, const SName* pTableName, STableMeta** pTableMeta, int32_t isSTable);
 
 
 /**
diff --git a/source/libs/catalog/inc/catalogInt.h b/source/libs/catalog/inc/catalogInt.h
index f426139c147e862633dafd26dc2f744ad77556a0..c4f2b54cf8a1c5d9b9589f3b36309e1e2934f40b 100644
--- a/source/libs/catalog/inc/catalogInt.h
+++ b/source/libs/catalog/inc/catalogInt.h
@@ -64,6 +64,14 @@ typedef struct SCatalogMgmt {
 
 typedef uint32_t (*tableNameHashFp)(const char *, uint32_t);
 
+#define CTG_IS_STABLE(isSTable) (1 == (isSTable))
+#define CTG_IS_NOT_STABLE(isSTable) (0 == (isSTable))
+#define CTG_IS_UNKNOWN_STABLE(isSTable) ((isSTable) < 0)
+#define CTG_SET_STABLE(isSTable, tbType) do { (isSTable) = ((tbType) == TSDB_SUPER_TABLE) ? 1 : ((tbType) > TSDB_SUPER_TABLE ? 0 : -1); } while (0)
+#define CTG_TBTYPE_MATCH(isSTable, tbType) (CTG_IS_UNKNOWN_STABLE(isSTable) || (CTG_IS_STABLE(isSTable) && (tbType) == TSDB_SUPER_TABLE) || (CTG_IS_NOT_STABLE(isSTable) && (tbType) != TSDB_SUPER_TABLE))
+
+#define CTG_TABLE_NOT_EXIST(code) (code == TSDB_CODE_TDB_INVALID_TABLE_ID) 
+
 #define ctgFatal(...)  do { if (ctgDebugFlag & DEBUG_FATAL) { taosPrintLog("CTG FATAL ", ctgDebugFlag, __VA_ARGS__); }} while(0)
 #define ctgError(...)  do { if (ctgDebugFlag & DEBUG_ERROR) { taosPrintLog("CTG ERROR ", ctgDebugFlag, __VA_ARGS__); }} while(0)
 #define ctgWarn(...)   do { if (ctgDebugFlag & DEBUG_WARN)  { taosPrintLog("CTG WARN ", ctgDebugFlag, __VA_ARGS__); }}  while(0)
diff --git a/source/libs/catalog/src/catalog.c b/source/libs/catalog/src/catalog.c
index abcfafa7869b1d108cbb0812dc830e45a07b1b59..f7139f21b86717ca13ab6f8c6e7c559fbc204e64 100644
--- a/source/libs/catalog/src/catalog.c
+++ b/source/libs/catalog/src/catalog.c
@@ -105,6 +105,8 @@ int32_t ctgGetTableMetaFromCache(struct SCatalog* pCatalog, const SName* pTableN
   }
 
   *exist = 1;
+  
+  tbMeta = *pTableMeta;
 
   if (tbMeta->tableType != TSDB_CHILD_TABLE) {
     return TSDB_CODE_SUCCESS;
@@ -143,6 +145,29 @@ int32_t ctgGetTableMetaFromCache(struct SCatalog* pCatalog, const SName* pTableN
   return TSDB_CODE_SUCCESS;
 }
 
+int32_t ctgGetTableTypeFromCache(struct SCatalog* pCatalog, const SName* pTableName, int32_t *tbType) {
+  if (NULL == pCatalog->tableCache.cache) {
+    return TSDB_CODE_SUCCESS;
+  }
+
+  char tbFullName[TSDB_TABLE_FNAME_LEN];
+  tNameExtractFullName(pTableName, tbFullName);
+
+  size_t sz = 0;
+  STableMeta *pTableMeta = NULL;
+  
+  taosHashGetCloneExt(pCatalog->tableCache.cache, tbFullName, strlen(tbFullName), NULL, (void **)&pTableMeta, &sz);
+
+  if (NULL == pTableMeta) {
+    return TSDB_CODE_SUCCESS;
+  }
+
+  *tbType = pTableMeta->tableType;
+  
+  return TSDB_CODE_SUCCESS;
+}
+
+
 void ctgGenEpSet(SEpSet *epSet, SVgroupInfo *vgroupInfo) {
   epSet->inUse = 0;
   epSet->numOfEps = vgroupInfo->numOfEps;
@@ -153,14 +178,7 @@ void ctgGenEpSet(SEpSet *epSet, SVgroupInfo *vgroupInfo) {
   }
 }
 
-int32_t ctgGetTableMetaFromMnode(struct SCatalog* pCatalog, void *pRpc, const SEpSet* pMgmtEps, const SName* pTableName, STableMetaOutput* output) {
-  if (NULL == pCatalog || NULL == pRpc || NULL == pMgmtEps || NULL == pTableName || NULL == output) {
-    CTG_ERR_RET(TSDB_CODE_CTG_INVALID_INPUT);
-  }
-
-  char tbFullName[TSDB_TABLE_FNAME_LEN];
-  tNameExtractFullName(pTableName, tbFullName);
-
+int32_t ctgGetTableMetaFromMnodeImpl(struct SCatalog* pCatalog, void *pRpc, const SEpSet* pMgmtEps, char* tbFullName, STableMetaOutput* output) {
   SBuildTableMetaInput bInput = {.vgId = 0, .dbName = NULL, .tableFullName = tbFullName};
   char *msg = NULL;
   SEpSet *pVnodeEpSet = NULL;
@@ -179,6 +197,12 @@ int32_t ctgGetTableMetaFromMnode(struct SCatalog* pCatalog, void *pRpc, const SE
   rpcSendRecv(pRpc, (SEpSet*)pMgmtEps, &rpcMsg, &rpcRsp);
   
   if (TSDB_CODE_SUCCESS != rpcRsp.code) {
+    if (CTG_TABLE_NOT_EXIST(rpcRsp.code)) {
+      output->metaNum = 0;
+      ctgDebug("tbmeta:%s not exist in mnode", tbFullName);
+      return TSDB_CODE_SUCCESS;
+    }
+    
     ctgError("error rsp for table meta, code:%x", rpcRsp.code);
     CTG_ERR_RET(rpcRsp.code);
   }
@@ -188,6 +212,13 @@ int32_t ctgGetTableMetaFromMnode(struct SCatalog* pCatalog, void *pRpc, const SE
   return TSDB_CODE_SUCCESS;
 }
 
+int32_t ctgGetTableMetaFromMnode(struct SCatalog* pCatalog, void *pRpc, const SEpSet* pMgmtEps, const SName* pTableName, STableMetaOutput* output) {
+  char tbFullName[TSDB_TABLE_FNAME_LEN];
+  tNameExtractFullName(pTableName, tbFullName);
+
+  return ctgGetTableMetaFromMnodeImpl(pCatalog, pRpc, pMgmtEps, tbFullName, output);
+}
+
 
 int32_t ctgGetTableMetaFromVnode(struct SCatalog* pCatalog, void *pRpc, const SEpSet* pMgmtEps, const SName* pTableName, SVgroupInfo *vgroupInfo, STableMetaOutput* output) {
   if (NULL == pCatalog || NULL == pRpc || NULL == pMgmtEps || NULL == pTableName || NULL == vgroupInfo || NULL == output) {
@@ -197,7 +228,7 @@ int32_t ctgGetTableMetaFromVnode(struct SCatalog* pCatalog, void *pRpc, const SE
   char dbFullName[TSDB_DB_FNAME_LEN];
   tNameGetFullDbName(pTableName, dbFullName);
 
-  SBuildTableMetaInput bInput = {.vgId = vgroupInfo->vgId, .dbName = dbFullName, .tableFullName = pTableName->tname};
+  SBuildTableMetaInput bInput = {.vgId = vgroupInfo->vgId, .dbName = dbFullName, .tableFullName = (char *)pTableName->tname};
   char *msg = NULL;
   SEpSet *pVnodeEpSet = NULL;
   int32_t msgLen = 0;
@@ -218,6 +249,12 @@ int32_t ctgGetTableMetaFromVnode(struct SCatalog* pCatalog, void *pRpc, const SE
   rpcSendRecv(pRpc, &epSet, &rpcMsg, &rpcRsp);
   
   if (TSDB_CODE_SUCCESS != rpcRsp.code) {
+    if (CTG_TABLE_NOT_EXIST(rpcRsp.code)) {
+      output->metaNum = 0;
+      ctgDebug("tbmeta:%s not exist in vnode", pTableName->tname);
+      return TSDB_CODE_SUCCESS;
+    }
+  
     ctgError("error rsp for table meta, code:%x", rpcRsp.code);
     CTG_ERR_RET(rpcRsp.code);
   }
@@ -322,22 +359,28 @@ _return:
   CTG_RET(TSDB_CODE_SUCCESS);
 }
 
-int32_t ctgGetTableMetaImpl(struct SCatalog* pCatalog, void *pRpc, const SEpSet* pMgmtEps, const SName* pTableName, bool forceUpdate, STableMeta** pTableMeta) {
+int32_t ctgGetTableMetaImpl(struct SCatalog* pCatalog, void *pRpc, const SEpSet* pMgmtEps, const SName* pTableName, bool forceUpdate, STableMeta** pTableMeta, int32_t isSTable) {
   if (NULL == pCatalog || NULL == pRpc || NULL == pMgmtEps || NULL == pTableName || NULL == pTableMeta) {
     CTG_ERR_RET(TSDB_CODE_CTG_INVALID_INPUT);
   }
   
   int32_t exist = 0;
 
-  if (!forceUpdate) {  
+  if (!forceUpdate) {
     CTG_ERR_RET(ctgGetTableMetaFromCache(pCatalog, pTableName, pTableMeta, &exist));
 
-    if (exist) {
+    if (exist && CTG_TBTYPE_MATCH(isSTable, (*pTableMeta)->tableType)) {
       return TSDB_CODE_SUCCESS;
     }
+  } else if (CTG_IS_UNKNOWN_STABLE(isSTable)) {
+    int32_t tbType = 0;
+    
+    CTG_ERR_RET(ctgGetTableTypeFromCache(pCatalog, pTableName, &tbType));
+
+    CTG_SET_STABLE(isSTable, tbType);
   }
 
-  CTG_ERR_RET(catalogRenewTableMeta(pCatalog, pRpc, pMgmtEps, pTableName));
+  CTG_ERR_RET(ctgRenewTableMetaImpl(pCatalog, pRpc, pMgmtEps, pTableName, isSTable));
 
   CTG_ERR_RET(ctgGetTableMetaFromCache(pCatalog, pTableName, pTableMeta, &exist));
 
@@ -364,19 +407,27 @@ int32_t ctgUpdateTableMetaCache(struct SCatalog *pCatalog, STableMetaOutput *out
   }
 
   if (NULL == pCatalog->tableCache.cache) {
-    pCatalog->tableCache.cache = taosHashInit(ctgMgmt.cfg.maxTblCacheNum, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BINARY), true, HASH_ENTRY_LOCK);
-    if (NULL == pCatalog->tableCache.cache) {
+    SHashObj *cache = taosHashInit(ctgMgmt.cfg.maxTblCacheNum, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BINARY), true, HASH_ENTRY_LOCK);
+    if (NULL == cache) {
       ctgError("init hash[%d] for tablemeta cache failed", ctgMgmt.cfg.maxTblCacheNum);
       CTG_ERR_RET(TSDB_CODE_CTG_MEM_ERROR);
     }
+
+    if (NULL != atomic_val_compare_exchange_ptr(&pCatalog->tableCache.cache, NULL, cache)) {
+      taosHashCleanup(cache);
+    }
   }
 
   if (NULL == pCatalog->tableCache.stableCache) {
-    pCatalog->tableCache.stableCache = taosHashInit(ctgMgmt.cfg.maxTblCacheNum, taosGetDefaultHashFunction(TSDB_DATA_TYPE_UBIGINT), true, HASH_ENTRY_LOCK);
-    if (NULL == pCatalog->tableCache.stableCache) {
+    SHashObj *cache = taosHashInit(ctgMgmt.cfg.maxTblCacheNum, taosGetDefaultHashFunction(TSDB_DATA_TYPE_UBIGINT), true, HASH_ENTRY_LOCK);
+    if (NULL == cache) {
       ctgError("init hash[%d] for stablemeta cache failed", ctgMgmt.cfg.maxTblCacheNum);
       CTG_ERR_RET(TSDB_CODE_CTG_MEM_ERROR);
     }
+
+    if (NULL != atomic_val_compare_exchange_ptr(&pCatalog->tableCache.stableCache, NULL, cache)) {
+      taosHashCleanup(cache);
+    }
   }
 
   if (output->metaNum == 2) {
@@ -481,6 +532,50 @@ int32_t ctgValidateAndRemoveDb(struct SCatalog* pCatalog, const char* dbName, SD
   return TSDB_CODE_SUCCESS;
 }
 
+int32_t ctgRenewTableMetaImpl(struct SCatalog* pCatalog, void *pTransporter, const SEpSet* pMgmtEps, const SName* pTableName, int32_t isSTable) {
+  if (NULL == pCatalog || NULL == pTransporter || NULL == pMgmtEps || NULL == pTableName) {
+    CTG_ERR_RET(TSDB_CODE_CTG_INVALID_INPUT);
+  }
+
+  SVgroupInfo vgroupInfo = {0};
+  int32_t code = 0;
+
+  CTG_ERR_RET(catalogGetTableHashVgroup(pCatalog, pTransporter, pMgmtEps, pTableName, &vgroupInfo));
+
+  STableMetaOutput voutput = {0};
+  STableMetaOutput moutput = {0};
+  STableMetaOutput *output = &voutput;
+
+  if (CTG_IS_STABLE(isSTable)) {
+    CTG_ERR_JRET(ctgGetTableMetaFromMnode(pCatalog, pTransporter, pMgmtEps, pTableName, &moutput));
+
+    if (0 == moutput.metaNum) {
+      CTG_ERR_JRET(ctgGetTableMetaFromVnode(pCatalog, pTransporter, pMgmtEps, pTableName, &vgroupInfo, &voutput));
+    } else {
+      output = &moutput;
+    }
+  } else {
+    CTG_ERR_JRET(ctgGetTableMetaFromVnode(pCatalog, pTransporter, pMgmtEps, pTableName, &vgroupInfo, &voutput));
+
+    if (voutput.metaNum > 0 && TSDB_SUPER_TABLE == voutput.tbMeta->tableType) {
+      CTG_ERR_JRET(ctgGetTableMetaFromMnodeImpl(pCatalog, pTransporter, pMgmtEps, voutput.tbFname, &moutput));
+
+      tfree(voutput.tbMeta);
+      voutput.tbMeta = moutput.tbMeta;
+      moutput.tbMeta = NULL;
+    }
+  }
+
+  CTG_ERR_JRET(ctgUpdateTableMetaCache(pCatalog, output));
+
+_return:
+
+  tfree(voutput.tbMeta);
+  tfree(moutput.tbMeta);
+  
+  CTG_RET(code);
+}
+
 
 int32_t catalogInit(SCatalogCfg *cfg) {
   if (ctgMgmt.pCluster) {
@@ -643,11 +738,15 @@ int32_t catalogUpdateDBVgroup(struct SCatalog* pCatalog, const char* dbName, SDB
   }
 
   if (NULL == pCatalog->dbCache.cache) {
-    pCatalog->dbCache.cache = taosHashInit(ctgMgmt.cfg.maxDBCacheNum, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BINARY), true, HASH_ENTRY_LOCK);
-    if (NULL == pCatalog->dbCache.cache) {
+    SHashObj *cache = taosHashInit(ctgMgmt.cfg.maxDBCacheNum, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BINARY), true, HASH_ENTRY_LOCK);
+    if (NULL == cache) {
       ctgError("init hash[%d] for db cache failed", CTG_DEFAULT_CACHE_DB_NUMBER);
       CTG_ERR_JRET(TSDB_CODE_CTG_MEM_ERROR);
     }
+
+    if (NULL != atomic_val_compare_exchange_ptr(&pCatalog->dbCache.cache, NULL, cache)) {
+      taosHashCleanup(cache);
+    }
   } else {
     CTG_ERR_JRET(ctgValidateAndRemoveDb(pCatalog, dbName, dbInfo));
   }
@@ -672,34 +771,23 @@ _return:
 }
 
 int32_t catalogGetTableMeta(struct SCatalog* pCatalog, void *pTransporter, const SEpSet* pMgmtEps, const SName* pTableName, STableMeta** pTableMeta) {
-  return ctgGetTableMetaImpl(pCatalog, pTransporter, pMgmtEps, pTableName, false, pTableMeta);
+  return ctgGetTableMetaImpl(pCatalog, pTransporter, pMgmtEps, pTableName, false, pTableMeta, -1);
 }
 
-int32_t catalogRenewTableMeta(struct SCatalog* pCatalog, void *pTransporter, const SEpSet* pMgmtEps, const SName* pTableName) {
+int32_t catalogGetSTableMeta(struct SCatalog* pCatalog, void * pTransporter, const SEpSet* pMgmtEps, const SName* pTableName, STableMeta** pTableMeta) {
+  return ctgGetTableMetaImpl(pCatalog, pTransporter, pMgmtEps, pTableName, false, pTableMeta, 1);
+}
+
+int32_t catalogRenewTableMeta(struct SCatalog* pCatalog, void *pTransporter, const SEpSet* pMgmtEps, const SName* pTableName, int32_t isSTable) {
   if (NULL == pCatalog || NULL == pTransporter || NULL == pMgmtEps || NULL == pTableName) {
     CTG_ERR_RET(TSDB_CODE_CTG_INVALID_INPUT);
   }
 
-  SVgroupInfo vgroupInfo = {0};
-  int32_t code = 0;
-
-  CTG_ERR_RET(catalogGetTableHashVgroup(pCatalog, pTransporter, pMgmtEps, pTableName, &vgroupInfo));
-
-  STableMetaOutput output = {0};
-  
-  CTG_ERR_RET(ctgGetTableMetaFromVnode(pCatalog, pTransporter, pMgmtEps, pTableName, &vgroupInfo, &output));
-
-  //CTG_ERR_RET(ctgGetTableMetaFromMnode(pCatalog, pRpc, pMgmtEps, pTableName, &output));
-
-  CTG_ERR_JRET(ctgUpdateTableMetaCache(pCatalog, &output));
-
-_return:
-  tfree(output.tbMeta);
-  CTG_RET(code);
+  return ctgRenewTableMetaImpl(pCatalog, pTransporter, pMgmtEps, pTableName, isSTable);
 }
 
-int32_t catalogRenewAndGetTableMeta(struct SCatalog* pCatalog, void *pTransporter, const SEpSet* pMgmtEps, const SName* pTableName, STableMeta** pTableMeta) {
-  return ctgGetTableMetaImpl(pCatalog, pTransporter, pMgmtEps, pTableName, true, pTableMeta);
+int32_t catalogRenewAndGetTableMeta(struct SCatalog* pCatalog, void *pTransporter, const SEpSet* pMgmtEps, const SName* pTableName, STableMeta** pTableMeta, int32_t isSTable) {
+  return ctgGetTableMetaImpl(pCatalog, pTransporter, pMgmtEps, pTableName, true, pTableMeta, isSTable);
 }
 
 int32_t catalogGetTableDistVgroup(struct SCatalog* pCatalog, void *pRpc, const SEpSet* pMgmtEps, const SName* pTableName, SArray** pVgroupList) {
diff --git a/source/libs/catalog/test/catalogTests.cpp b/source/libs/catalog/test/catalogTests.cpp
index 1d8a48dfcbb5670c6a997afb4364b7f3341977b8..4fc53e5f18521bdc126bc2f86cc4cf92b8a870ba 100644
--- a/source/libs/catalog/test/catalogTests.cpp
+++ b/source/libs/catalog/test/catalogTests.cpp
@@ -45,7 +45,7 @@ void ctgTestSetPrepareSTableMeta();
 
 bool ctgTestStop = false;
 bool ctgTestEnableSleep = false;
-bool ctgTestDeadLoop = true;
+bool ctgTestDeadLoop = false;
 
 int32_t ctgTestCurrentVgVersion = 0;
 int32_t ctgTestVgVersion = 1;
@@ -600,7 +600,6 @@ void *ctgTestSetCtableMetaThread(void *param) {
 
 }
 
-#if 0
 
 TEST(tableMeta, normalTable) {
   struct SCatalog* pCtg = NULL;
@@ -768,7 +767,7 @@ TEST(tableMeta, superTableCase) {
   ASSERT_EQ(tableMeta->tableInfo.rowSize, 12);
 
   tableMeta = NULL;
-  code = catalogRenewAndGetTableMeta(pCtg, mockPointer, (const SEpSet *)mockPointer, &n, &tableMeta);
+  code = catalogRenewAndGetTableMeta(pCtg, mockPointer, (const SEpSet *)mockPointer, &n, &tableMeta, 0);
   ASSERT_EQ(code, 0);
   ASSERT_EQ(tableMeta->vgId, 9);
   ASSERT_EQ(tableMeta->tableType, TSDB_CHILD_TABLE);
@@ -999,8 +998,6 @@ TEST(multiThread, getSetDbVgroupCase) {
   catalogDestroy();
 }
 
-#endif
-
 
 TEST(multiThread, ctableMeta) {
   struct SCatalog* pCtg = NULL;
diff --git a/source/libs/scheduler/inc/schedulerInt.h b/source/libs/scheduler/inc/schedulerInt.h
index fa4ae0d1521456392dc065734f24e252b5fc0598..1d5d0599e60eb75d8a9314176aec14c6d35da7a5 100644
--- a/source/libs/scheduler/inc/schedulerInt.h
+++ b/source/libs/scheduler/inc/schedulerInt.h
@@ -114,8 +114,9 @@ typedef struct SSchJob {
 #define SCH_IS_DATA_SRC_TASK(task) ((task)->plan->type == QUERY_TYPE_SCAN)
 #define SCH_TASK_NEED_WAIT_ALL(task) ((task)->plan->type == QUERY_TYPE_MODIFY)
 
-#define SCH_JOB_ERR_LOG(param, ...) qError("QID:%"PRIx64 param, job->queryId, __VA_ARGS__)
-#define SCH_TASK_ERR_LOG(param, ...) qError("QID:%"PRIx64",TID:%"PRIx64 param, job->queryId, task->taskId, __VA_ARGS__)
+#define SCH_JOB_ELOG(param, ...) qError("QID:% "PRIx64 param, job->queryId, __VA_ARGS__)
+#define SCH_TASK_ELOG(param, ...) qError("QID:%"PRIx64",TID:% "PRIx64 param, job->queryId, task->taskId, __VA_ARGS__)
+#define SCH_TASK_DLOG(param, ...) qDebug("QID:%"PRIx64",TID:% "PRIx64 param, job->queryId, task->taskId, __VA_ARGS__)
 
 #define SCH_ERR_RET(c) do { int32_t _code = c; if (_code != TSDB_CODE_SUCCESS) { terrno = _code; return _code; } } while (0)
 #define SCH_RET(c) do { int32_t _code = c; if (_code != TSDB_CODE_SUCCESS) { terrno = _code; } return _code; } while (0)
diff --git a/source/libs/scheduler/src/scheduler.c b/source/libs/scheduler/src/scheduler.c
index 9079912c402c6ba16b3a7d2e493b17a7cf5d675a..075be706ea5aed08d25e15f02b83a802983467be 100644
--- a/source/libs/scheduler/src/scheduler.c
+++ b/source/libs/scheduler/src/scheduler.c
@@ -270,6 +270,8 @@ int32_t schPushTaskToExecList(SSchJob *job, SSchTask *task) {
     SCH_ERR_RET(TSDB_CODE_QRY_OUT_OF_MEMORY);
   }
 
+  SCH_TASK_DLOG("push to %s list", "execTasks");
+
   return TSDB_CODE_SUCCESS;
 }
 
@@ -284,6 +286,8 @@ int32_t schMoveTaskToSuccList(SSchJob *job, SSchTask *task, bool *moved) {
     SCH_ERR_RET(TSDB_CODE_QRY_OUT_OF_MEMORY);
   }
 
+  SCH_TASK_DLOG("push to %s list", "succTasks");
+
   *moved = true;
   
   return TSDB_CODE_SUCCESS;
@@ -299,6 +303,8 @@ int32_t schMoveTaskToFailList(SSchJob *job, SSchTask *task, bool *moved) {
     SCH_ERR_RET(TSDB_CODE_QRY_OUT_OF_MEMORY);
   }
 
+  SCH_TASK_DLOG("push to %s list", "failTasks");
+
   *moved = true;
   
   return TSDB_CODE_SUCCESS;
@@ -372,7 +378,7 @@ int32_t schProcessOnTaskSuccess(SSchJob *job, SSchTask *task) {
   
   SCH_ERR_RET(schMoveTaskToSuccList(job, task, &moved));
   if (!moved) {
-    SCH_TASK_ERR_LOG(" task may already moved, status:%d", task->status);
+    SCH_TASK_ELOG("task may already moved, status:%d", task->status);
     return TSDB_CODE_SUCCESS;
   }
 
@@ -447,11 +453,11 @@ int32_t schProcessOnTaskFailure(SSchJob *job, SSchTask *task, int32_t errCode) {
   SCH_ERR_RET(schTaskCheckAndSetRetry(job, task, errCode, &needRetry));
   
   if (!needRetry) {
-    SCH_TASK_ERR_LOG("task failed[%x], no more retry", errCode);
+    SCH_TASK_ELOG("task failed[%x], no more retry", errCode);
 
     SCH_ERR_RET(schMoveTaskToFailList(job, task, &moved));
     if (!moved) {
-      SCH_TASK_ERR_LOG("task may already moved, status:%d", task->status);
+      SCH_TASK_ELOG("task may already moved, status:%d", task->status);
     }    
     
     if (SCH_TASK_NEED_WAIT_ALL(task)) {
@@ -491,7 +497,6 @@ int32_t schProcessRspMsg(SSchJob *job, SSchTask *task, int32_t msgType, char *ms
           goto _task_error;
         }
       }
-
       break;
     }
     case TDMT_VND_SUBMIT_RSP: {
@@ -568,19 +573,25 @@ int32_t schHandleCallback(void* param, const SDataBuf* pMsg, int32_t msgType, in
   int32_t code = 0;
   SSchCallbackParam *pParam = (SSchCallbackParam *)param;
   
-  SSchJob **job = taosHashGet(schMgmt.jobs, &pParam->queryId, sizeof(pParam->queryId));
-  if (NULL == job || NULL == (*job)) {
+  SSchJob **pjob = taosHashGet(schMgmt.jobs, &pParam->queryId, sizeof(pParam->queryId));
+  if (NULL == pjob || NULL == (*pjob)) {
     qError("taosHashGet queryId:%"PRIx64" not exist", pParam->queryId);
     SCH_ERR_JRET(TSDB_CODE_SCH_INTERNAL_ERROR);
   }
 
-  SSchTask **task = taosHashGet((*job)->execTasks, &pParam->taskId, sizeof(pParam->taskId));
-  if (NULL == task || NULL == (*task)) {
+  SSchJob *job = *pjob;
+
+  SSchTask **ptask = taosHashGet(job->execTasks, &pParam->taskId, sizeof(pParam->taskId));
+  if (NULL == ptask || NULL == (*ptask)) {
     qError("taosHashGet taskId:%"PRIx64" not exist", pParam->taskId);
     SCH_ERR_JRET(TSDB_CODE_SCH_INTERNAL_ERROR);
   }
+
+  SSchTask *task = *ptask;
+
+  SCH_TASK_DLOG("Got msg:%d, rspCode:%d", msgType, rspCode);
   
-  schProcessRspMsg(*job, *task, msgType, pMsg->pData, pMsg->len, rspCode);
+  schProcessRspMsg(job, task, msgType, pMsg->pData, pMsg->len, rspCode);
 
 _return:  
   tfree(param);
@@ -810,7 +821,7 @@ int32_t schLaunchTask(SSchJob *job, SSchTask *task) {
   SCH_ERR_RET(schSetTaskCondidateAddrs(job, task));
 
   if (NULL == task->condidateAddrs || taosArrayGetSize(task->condidateAddrs) <= 0) {
-    SCH_TASK_ERR_LOG("no valid condidate node for task:%"PRIx64, task->taskId);
+    SCH_TASK_ELOG("no valid condidate node for task:%"PRIx64, task->taskId);
     SCH_ERR_RET(TSDB_CODE_SCH_INTERNAL_ERROR);
   }