diff --git a/cmake/cmake.options b/cmake/cmake.options
index c77b580c17e6d7c7f32ffa24fddd01ecb0f1e394..cb6fd1400d43b6073d81ab43e46140343b277512 100644
--- a/cmake/cmake.options
+++ b/cmake/cmake.options
@@ -146,5 +146,6 @@ option(
 option(
    BUILD_WITH_INVERTEDINDEX
    "If use invertedIndex" 
-   ON 
+   OFF 
 )
+
diff --git a/source/dnode/vnode/CMakeLists.txt b/source/dnode/vnode/CMakeLists.txt
index a8e3860ed14035d5bedd5e1b096c45e1f03ec6e3..b10bee473284f272880ba94522065f65a9a58a7f 100644
--- a/source/dnode/vnode/CMakeLists.txt
+++ b/source/dnode/vnode/CMakeLists.txt
@@ -76,9 +76,14 @@ target_link_libraries(
     #PUBLIC scalar
     PUBLIC transport
     PUBLIC stream
+    PUBLIC index
 )
 target_compile_definitions(vnode PUBLIC -DMETA_REFACT)
-
+if (${BUILD_WITH_INVERTEDINDEX})
+  add_definitions(-DUSE_INVERTED_INDEX) 
+endif(${BUILD_WITH_INVERTEDINDEX})
 if(${BUILD_TEST})
     add_subdirectory(test)
 endif(${BUILD_TEST})
+
+
diff --git a/source/dnode/vnode/src/inc/meta.h b/source/dnode/vnode/src/inc/meta.h
index 693f4a0a2b4e0223f956990c59316b696b8a1c9a..3340bbb91ce0f8ed29b2ef48fc325472676b56e1 100644
--- a/source/dnode/vnode/src/inc/meta.h
+++ b/source/dnode/vnode/src/inc/meta.h
@@ -17,6 +17,7 @@
 #define _TD_VNODE_META_H_
 
 #include "vnodeInt.h"
+#include "index.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -61,16 +62,20 @@ static FORCE_INLINE tb_uid_t metaGenerateUid(SMeta* pMeta) { return tGenIdPI64()
 struct SMeta {
   TdThreadRwlock lock;
 
-  char*     path;
-  SVnode*   pVnode;
-  TDB*      pEnv;
-  TXN       txn;
-  TTB*      pTbDb;
-  TTB*      pSkmDb;
-  TTB*      pUidIdx;
-  TTB*      pNameIdx;
-  TTB*      pCtbIdx;
-  TTB*      pTagIdx;
+  char*   path;
+  SVnode* pVnode;
+  TDB*    pEnv;
+  TXN     txn;
+  TTB*    pTbDb;
+  TTB*    pSkmDb;
+  TTB*    pUidIdx;
+  TTB*    pNameIdx;
+  TTB*    pCtbIdx;
+#ifdef USE_INVERTED_INDEX
+  void* pTagIvtIdx;
+#else
+  TTB* pTagIdx;
+#endif
   TTB*      pTtlIdx;
   TTB*      pSmaIdx;
   SMetaIdx* pIdx;
diff --git a/source/dnode/vnode/src/meta/metaIdx.c b/source/dnode/vnode/src/meta/metaIdx.c
index 3f52071315bf15ca15beb2a14105c757d1b2eb25..efa06d2d1fea29995522e95b49789c6df3c2c435 100644
--- a/source/dnode/vnode/src/meta/metaIdx.c
+++ b/source/dnode/vnode/src/meta/metaIdx.c
@@ -53,10 +53,10 @@ int metaOpenIdx(SMeta *pMeta) {
 #endif
 
 #ifdef USE_INVERTED_INDEX
-  SIndexOpts opts;
-  if (indexOpen(&opts, pMeta->path, &pMeta->pIdx->pIdx) != 0) {
-    return -1;
-  }
+  // SIndexOpts opts;
+  // if (indexOpen(&opts, pMeta->path, &pMeta->pIdx->pIdx) != 0) {
+  //  return -1;
+  //}
 
 #endif
   return 0;
@@ -71,36 +71,37 @@ void metaCloseIdx(SMeta *pMeta) { /* TODO */
 #endif
 
 #ifdef USE_INVERTED_INDEX
-  SIndexOpts opts;
-  if (indexClose(pMeta->pIdx->pIdx) != 0) {
-    return -1;
-  }
+  // SIndexOpts opts;
+  // if (indexClose(pMeta->pIdx->pIdx) != 0) {
+  //  return -1;
+  //}
+  // return 0;
 
 #endif
 }
 
 int metaSaveTableToIdx(SMeta *pMeta, const STbCfg *pTbCfg) {
 #ifdef USE_INVERTED_INDEX
-  if (pTbCfgs->type == META_CHILD_TABLE) {
-    char    buf[8] = {0};
-    int16_t colId = (kvRowColIdx(pTbCfg->ctbCfg.pTag))[0].colId;
-    sprintf(buf, "%d", colId);  // colname
-
-    char *pTagVal = (char *)tdGetKVRowValOfCol(pTbCfg->ctbCfg.pTag, (kvRowColIdx(pTbCfg->ctbCfg.pTag))[0].colId);
-
-    tb_uid_t         suid = pTbCfg->ctbCfg.suid;  // super id
-    tb_uid_t         tuid = 0;                    // child table uid
-    SIndexMultiTerm *terms = indexMultiTermCreate();
-    SIndexTerm      *term =
-        indexTermCreate(suid, ADD_VALUE, TSDB_DATA_TYPE_BINARY, buf, strlen(buf), pTagVal, strlen(pTagVal), tuid);
-    indexMultiTermAdd(terms, term);
-
-    int ret = indexPut(pMeta->pIdx->pIdx, terms);
-    indexMultiTermDestroy(terms);
-    return ret;
-  } else {
-    return DB_DONOTINDEX;
-  }
+  // if (pTbCfgs->type == META_CHILD_TABLE) {
+  //  char    buf[8] = {0};
+  //  int16_t colId = (kvRowColIdx(pTbCfg->ctbCfg.pTag))[0].colId;
+  //  sprintf(buf, "%d", colId);  // colname
+
+  //  char *pTagVal = (char *)tdGetKVRowValOfCol(pTbCfg->ctbCfg.pTag, (kvRowColIdx(pTbCfg->ctbCfg.pTag))[0].colId);
+
+  //  tb_uid_t         suid = pTbCfg->ctbCfg.suid;  // super id
+  //  tb_uid_t         tuid = 0;                    // child table uid
+  //  SIndexMultiTerm *terms = indexMultiTermCreate();
+  //  SIndexTerm      *term =
+  //      indexTermCreate(suid, ADD_VALUE, TSDB_DATA_TYPE_BINARY, buf, strlen(buf), pTagVal, strlen(pTagVal), tuid);
+  //  indexMultiTermAdd(terms, term);
+
+  //  int ret = indexPut(pMeta->pIdx->pIdx, terms);
+  //  indexMultiTermDestroy(terms);
+  //  return ret;
+  //} else {
+  //  return DB_DONOTINDEX;
+  //}
 #endif
   // TODO
   return 0;
@@ -112,4 +113,4 @@ int metaRemoveTableFromIdx(SMeta *pMeta, tb_uid_t uid) {
 #endif
   // TODO
   return 0;
-}
\ No newline at end of file
+}
diff --git a/source/dnode/vnode/src/meta/metaOpen.c b/source/dnode/vnode/src/meta/metaOpen.c
index 9a97357b97ac8e637d7a8cf72139b6615e7fdb05..f23e7f88056d6a397a5979bda11dd4f080ba0212 100644
--- a/source/dnode/vnode/src/meta/metaOpen.c
+++ b/source/dnode/vnode/src/meta/metaOpen.c
@@ -93,11 +93,24 @@ int metaOpen(SVnode *pVnode, SMeta **ppMeta) {
   }
 
   // open pTagIdx
+#ifdef USE_INVERTED_INDEX
+  // TODO(yihaoDeng), refactor later
+  char indexFullPath[128] = {0};
+  sprintf(indexFullPath, "%s/%s", pMeta->path, "invert");
+  taosMkDir(indexFullPath);
+  ret = indexOpen(indexOptsCreate(), indexFullPath, (SIndex **)&pMeta->pTagIvtIdx);
+  if (ret < 0) {
+    metaError("vgId:%d failed to open meta tag index since %s", TD_VID(pVnode), tstrerror(terrno));
+    goto _err;
+  }
+
+#else
   ret = tdbTbOpen("tag.idx", -1, 0, tagIdxKeyCmpr, pMeta->pEnv, &pMeta->pTagIdx);
   if (ret < 0) {
     metaError("vgId:%d failed to open meta tag index since %s", TD_VID(pVnode), tstrerror(terrno));
     goto _err;
   }
+#endif
 
   // open pTtlIdx
   ret = tdbTbOpen("ttl.idx", sizeof(STtlIdxKey), 0, ttlIdxKeyCmpr, pMeta->pEnv, &pMeta->pTtlIdx);
@@ -128,7 +141,11 @@ _err:
   if (pMeta->pIdx) metaCloseIdx(pMeta);
   if (pMeta->pSmaIdx) tdbTbClose(pMeta->pSmaIdx);
   if (pMeta->pTtlIdx) tdbTbClose(pMeta->pTtlIdx);
+#ifdef USE_INVERTED_INDEX
+  if (pMeta->pTagIvtIdx) indexClose(pMeta->pTagIvtIdx);
+#else
   if (pMeta->pTagIdx) tdbTbClose(pMeta->pTagIdx);
+#endif
   if (pMeta->pCtbIdx) tdbTbClose(pMeta->pCtbIdx);
   if (pMeta->pNameIdx) tdbTbClose(pMeta->pNameIdx);
   if (pMeta->pUidIdx) tdbTbClose(pMeta->pUidIdx);
@@ -145,7 +162,11 @@ int metaClose(SMeta *pMeta) {
     if (pMeta->pIdx) metaCloseIdx(pMeta);
     if (pMeta->pSmaIdx) tdbTbClose(pMeta->pSmaIdx);
     if (pMeta->pTtlIdx) tdbTbClose(pMeta->pTtlIdx);
+#ifdef USE_INVERTED_INDEX
+    if (pMeta->pTagIvtIdx) indexClose(pMeta->pTagIvtIdx);
+#else
     if (pMeta->pTagIdx) tdbTbClose(pMeta->pTagIdx);
+#endif
     if (pMeta->pCtbIdx) tdbTbClose(pMeta->pCtbIdx);
     if (pMeta->pNameIdx) tdbTbClose(pMeta->pNameIdx);
     if (pMeta->pUidIdx) tdbTbClose(pMeta->pUidIdx);
diff --git a/source/dnode/vnode/src/meta/metaTable.c b/source/dnode/vnode/src/meta/metaTable.c
index f548904a7a575da65a6fe5454e389b4d7706e168..6cda56a5893e88a6801de71b357d995270484b58 100644
--- a/source/dnode/vnode/src/meta/metaTable.c
+++ b/source/dnode/vnode/src/meta/metaTable.c
@@ -30,9 +30,9 @@ int metaCreateSTable(SMeta *pMeta, int64_t version, SVCreateStbReq *pReq) {
   int         vLen = 0;
   const void *pKey = NULL;
   const void *pVal = NULL;
-  void       *pBuf = NULL;
+  void *      pBuf = NULL;
   int32_t     szBuf = 0;
-  void       *p = NULL;
+  void *      p = NULL;
   SMetaReader mr = {0};
 
   // validate req
@@ -71,9 +71,9 @@ _err:
 }
 
 int metaDropSTable(SMeta *pMeta, int64_t verison, SVDropStbReq *pReq) {
-  TBC        *pNameIdxc = NULL;
-  TBC        *pUidIdxc = NULL;
-  TBC        *pCtbIdxc = NULL;
+  TBC *       pNameIdxc = NULL;
+  TBC *       pUidIdxc = NULL;
+  TBC *       pCtbIdxc = NULL;
   SCtbIdxKey *pCtbIdxKey;
   const void *pKey = NULL;
   int         nKey;
@@ -134,8 +134,8 @@ _err:
 int metaAlterSTable(SMeta *pMeta, int64_t version, SVCreateStbReq *pReq) {
   SMetaEntry  oStbEntry = {0};
   SMetaEntry  nStbEntry = {0};
-  TBC        *pUidIdxc = NULL;
-  TBC        *pTbDbc = NULL;
+  TBC *       pUidIdxc = NULL;
+  TBC *       pTbDbc = NULL;
   const void *pData;
   int         nData;
   int64_t     oversion;
@@ -256,9 +256,9 @@ _err:
 }
 
 int metaDropTable(SMeta *pMeta, int64_t version, SVDropTbReq *pReq, SArray *tbUids) {
-  TBC        *pTbDbc = NULL;
-  TBC        *pUidIdxc = NULL;
-  TBC        *pNameIdxc = NULL;
+  TBC *       pTbDbc = NULL;
+  TBC *       pUidIdxc = NULL;
+  TBC *       pNameIdxc = NULL;
   const void *pData;
   int         nData;
   tb_uid_t    uid;
@@ -377,14 +377,14 @@ int metaDropTable(SMeta *pMeta, int64_t version, SVDropTbReq *pReq, SArray *tbUi
 }
 
 static int metaAlterTableColumn(SMeta *pMeta, int64_t version, SVAlterTbReq *pAlterTbReq) {
-  void           *pVal = NULL;
+  void *          pVal = NULL;
   int             nVal = 0;
-  const void     *pData = NULL;
+  const void *    pData = NULL;
   int             nData = 0;
   int             ret = 0;
   tb_uid_t        uid;
   int64_t         oversion;
-  SSchema        *pColumn = NULL;
+  SSchema *       pColumn = NULL;
   SMetaEntry      entry = {0};
   SSchemaWrapper *pSchema;
   int             c;
@@ -530,7 +530,7 @@ _err:
 static int metaUpdateTableTagVal(SMeta *pMeta, int64_t version, SVAlterTbReq *pAlterTbReq) {
   SMetaEntry  ctbEntry = {0};
   SMetaEntry  stbEntry = {0};
-  void       *pVal = NULL;
+  void *      pVal = NULL;
   int         nVal = 0;
   int         ret;
   int         c;
@@ -561,7 +561,7 @@ static int metaUpdateTableTagVal(SMeta *pMeta, int64_t version, SVAlterTbReq *pA
   oversion = *(int64_t *)pData;
 
   // search table.db
-  TBC     *pTbDbc = NULL;
+  TBC *    pTbDbc = NULL;
   SDecoder dc1 = {0};
   SDecoder dc2 = {0};
 
@@ -585,7 +585,7 @@ static int metaUpdateTableTagVal(SMeta *pMeta, int64_t version, SVAlterTbReq *pA
   metaDecodeEntry(&dc2, &stbEntry);
 
   SSchemaWrapper *pTagSchema = &stbEntry.stbEntry.schemaTag;
-  SSchema        *pColumn = NULL;
+  SSchema *       pColumn = NULL;
   int32_t         iCol = 0;
   for (;;) {
     pColumn = NULL;
@@ -681,8 +681,8 @@ int metaAlterTable(SMeta *pMeta, int64_t version, SVAlterTbReq *pReq) {
 
 static int metaSaveToTbDb(SMeta *pMeta, const SMetaEntry *pME) {
   STbDbKey tbDbKey;
-  void    *pKey = NULL;
-  void    *pVal = NULL;
+  void *   pKey = NULL;
+  void *   pVal = NULL;
   int      kLen = 0;
   int      vLen = 0;
   SEncoder coder = {0};
@@ -797,14 +797,14 @@ static void metaDestroyTagIdxKey(STagIdxKey *pTagIdxKey) {
 }
 
 static int metaUpdateTagIdx(SMeta *pMeta, const SMetaEntry *pCtbEntry) {
-  void          *pData = NULL;
+  void *         pData = NULL;
   int            nData = 0;
   STbDbKey       tbDbKey = {0};
   SMetaEntry     stbEntry = {0};
-  STagIdxKey    *pTagIdxKey = NULL;
+  STagIdxKey *   pTagIdxKey = NULL;
   int32_t        nTagIdxKey;
   const SSchema *pTagColumn;       // = &stbEntry.stbEntry.schema.pSchema[0];
-  const void    *pTagData = NULL;  //
+  const void *   pTagData = NULL;  //
   SDecoder       dc = {0};
 
   // get super table
@@ -820,22 +820,33 @@ static int metaUpdateTagIdx(SMeta *pMeta, const SMetaEntry *pCtbEntry) {
   pTagData = tdGetKVRowValOfCol((const SKVRow)pCtbEntry->ctbEntry.pTags, pTagColumn->colId);
 
   // update tag index
+#ifdef USE_INVERTED_INDEX
+  tb_uid_t suid = pCtbEntry->ctbEntry.suid;
+  tb_uid_t tuid = pCtbEntry->uid;
+
+  SIndexMultiTerm *tmGroup = indexMultiTermCreate();
+
+  SIndexTerm *tm = indexTermCreate(suid, ADD_VALUE, pTagColumn->type, pTagColumn->name, sizeof(pTagColumn->name),
+                                   pTagData, pTagData == NULL ? 0 : strlen(pTagData));
+  indexMultiTermAdd(tmGroup, tm);
+  int ret = indexPut((SIndex *)pMeta->pTagIvtIdx, tmGroup, tuid);
+  indexMultiTermDestroy(tmGroup);
+#else
   if (metaCreateTagIdxKey(pCtbEntry->ctbEntry.suid, pTagColumn->colId, pTagData, pTagColumn->type, pCtbEntry->uid,
                           &pTagIdxKey, &nTagIdxKey) < 0) {
     return -1;
   }
   tdbTbInsert(pMeta->pTagIdx, pTagIdxKey, nTagIdxKey, NULL, 0, &pMeta->txn);
   metaDestroyTagIdxKey(pTagIdxKey);
-
+#endif
   tDecoderClear(&dc);
   tdbFree(pData);
-
   return 0;
 }
 
 static int metaSaveToSkmDb(SMeta *pMeta, const SMetaEntry *pME) {
   SEncoder              coder = {0};
-  void                 *pVal = NULL;
+  void *                pVal = NULL;
   int                   vLen = 0;
   int                   rcode = 0;
   SSkmDbKey             skmDbKey = {0};
diff --git a/source/libs/executor/src/indexoperator.c b/source/libs/executor/src/indexoperator.c
index 2c204e93563367b820eabc27321631935beb2489..123c77ce9b8656654cfef0b02fcf37e1e04a229e 100644
--- a/source/libs/executor/src/indexoperator.c
+++ b/source/libs/executor/src/indexoperator.c
@@ -19,38 +19,11 @@
 #include "nodes.h"
 #include "tdatablock.h"
 
-typedef struct SIFCtx {
-  int32_t   code;
-  SHashObj *pRes;    /* element is SScalarParam */
-  bool      noExec;  // true: just iterate condition tree, and add hint to executor plan
-  // SIdxFltStatus st;
-} SIFCtx;
-
-#define SIF_ERR_RET(c)                \
-  do {                                \
-    int32_t _code = c;                \
-    if (_code != TSDB_CODE_SUCCESS) { \
-      terrno = _code;                 \
-      return _code;                   \
-    }                                 \
-  } while (0)
-#define SIF_RET(c)                    \
-  do {                                \
-    int32_t _code = c;                \
-    if (_code != TSDB_CODE_SUCCESS) { \
-      terrno = _code;                 \
-    }                                 \
-    return _code;                     \
-  } while (0)
-#define SIF_ERR_JRET(c)              \
-  do {                               \
-    code = c;                        \
-    if (code != TSDB_CODE_SUCCESS) { \
-      terrno = code;                 \
-      goto _return;                  \
-    }                                \
-  } while (0)
-
+// clang-format off
+#define SIF_ERR_RET(c) do { int32_t _code = c; if (_code != TSDB_CODE_SUCCESS) { terrno = _code; return _code; } } while (0)
+#define SIF_RET(c) do { int32_t _code = c; if (_code != TSDB_CODE_SUCCESS) { terrno = _code; } return _code; } while (0)
+#define SIF_ERR_JRET(c) do { code = c; if (code != TSDB_CODE_SUCCESS) { terrno = code; goto _return; } } while (0)
+// clang-format on
 typedef struct SIFParam {
   SHashObj *pFilter;
 
@@ -65,6 +38,13 @@ typedef struct SIFParam {
   char          colName[TSDB_COL_NAME_LEN];
 } SIFParam;
 
+typedef struct SIFCtx {
+  int32_t   code;
+  SHashObj *pRes;    /* element is SIFParam */
+  bool      noExec;  // true: just iterate condition tree, and add hint to executor plan
+  // SIdxFltStatus st;
+} SIFCtx;
+
 static int32_t sifGetFuncFromSql(EOperatorType src, EIndexQueryType *dst) {
   if (src == OP_TYPE_GREATER_THAN) {
     *dst = QUERY_GREATER_THAN;
diff --git a/source/libs/index/CMakeLists.txt b/source/libs/index/CMakeLists.txt
index 7dc66e47898eed6e58288d775a0d4c78f79dc4b0..d5fd574aadaf2e0c228b6f0dfd54fd809b00ac0f 100644
--- a/source/libs/index/CMakeLists.txt
+++ b/source/libs/index/CMakeLists.txt
@@ -31,7 +31,7 @@ if (${BUILD_WITH_INVERTEDINDEX})
 endif(${BUILD_WITH_INVERTEDINDEX})
 
 
-if (${BUILD_TEST})
-  add_subdirectory(test)
-endif(${BUILD_TEST})
+#if (${BUILD_TEST})
+#  add_subdirectory(test)
+#endif(${BUILD_TEST})
 
diff --git a/source/libs/index/inc/indexCache.h b/source/libs/index/inc/indexCache.h
index d474d874090b09a4a9952e25a8a8f84eca77bf10..aff2e0e836c0f2aae9a1fe63dd984cd4f5eb7850 100644
--- a/source/libs/index/inc/indexCache.h
+++ b/source/libs/index/inc/indexCache.h
@@ -63,7 +63,10 @@ typedef struct CacheTerm {
 
 IndexCache* indexCacheCreate(SIndex* idx, uint64_t suid, const char* colName, int8_t type);
 
+void indexCacheForceToMerge(void* cache);
 void indexCacheDestroy(void* cache);
+void indexCacheBroadcast(void* cache);
+void indexCacheWait(void* cache);
 
 Iterate* indexCacheIteratorCreate(IndexCache* cache);
 void     indexCacheIteratorDestroy(Iterate* iiter);
diff --git a/source/libs/index/inc/indexInt.h b/source/libs/index/inc/indexInt.h
index 27c380beafb53065f7bfd4e5955be234406a58f6..0bdcb131b69befd518b233e38a2653a17e67bde8 100644
--- a/source/libs/index/inc/indexInt.h
+++ b/source/libs/index/inc/indexInt.h
@@ -58,6 +58,8 @@ struct SIndex {
 
   SIndexStat    stat;
   TdThreadMutex mtx;
+  tsem_t        sem;
+  bool          quit;
 };
 
 struct SIndexOpts {
@@ -69,6 +71,7 @@ struct SIndexOpts {
   int32_t cacheSize;  // MB
   // add cache module later
 #endif
+  int32_t cacheOpt;  // MB
 };
 
 struct SIndexMultiTermQuery {
@@ -131,42 +134,14 @@ int32_t indexSerialCacheKey(ICacheKey* key, char* buf);
 // int32_t indexSerialKey(ICacheKey* key, char* buf);
 // int32_t indexSerialTermKey(SIndexTerm* itm, char* buf);
 
-#define indexFatal(...)                                            \
-  do {                                                             \
-    if (sDebugFlag & DEBUG_FATAL) {                                \
-      taosPrintLog("index FATAL ", DEBUG_FATAL, 255, __VA_ARGS__); \
-    }                                                              \
-  } while (0)
-#define indexError(...)                                            \
-  do {                                                             \
-    if (sDebugFlag & DEBUG_ERROR) {                                \
-      taosPrintLog("index ERROR ", DEBUG_ERROR, 255, __VA_ARGS__); \
-    }                                                              \
-  } while (0)
-#define indexWarn(...)                                           \
-  do {                                                           \
-    if (sDebugFlag & DEBUG_WARN) {                               \
-      taosPrintLog("index WARN ", DEBUG_WARN, 255, __VA_ARGS__); \
-    }                                                            \
-  } while (0)
-#define indexInfo(...)                                      \
-  do {                                                      \
-    if (sDebugFlag & DEBUG_INFO) {                          \
-      taosPrintLog("index ", DEBUG_INFO, 255, __VA_ARGS__); \
-    }                                                       \
-  } while (0)
-#define indexDebug(...)                                             \
-  do {                                                              \
-    if (sDebugFlag & DEBUG_DEBUG) {                                 \
-      taosPrintLog("index ", DEBUG_DEBUG, sDebugFlag, __VA_ARGS__); \
-    }                                                               \
-  } while (0)
-#define indexTrace(...)                                             \
-  do {                                                              \
-    if (sDebugFlag & DEBUG_TRACE) {                                 \
-      taosPrintLog("index ", DEBUG_TRACE, sDebugFlag, __VA_ARGS__); \
-    }                                                               \
-  } while (0)
+// clang-format off
+#define indexFatal(...) do { if (sDebugFlag & DEBUG_FATAL) {  taosPrintLog("INDEX FATAL ", DEBUG_FATAL, 255, __VA_ARGS__); }} while (0)
+#define indexError(...) do { if (sDebugFlag & DEBUG_ERROR) {  taosPrintLog("INDEX ERROR ", DEBUG_ERROR, 255, __VA_ARGS__); }} while (0)
+#define indexWarn(...)  do { if (sDebugFlag & DEBUG_WARN)  {  taosPrintLog("INDEX WARN ", DEBUG_WARN, 255, __VA_ARGS__); }} while (0)
+#define indexInfo(...)  do { if (sDebugFlag & DEBUG_INFO)  { taosPrintLog("INDEX ", DEBUG_INFO, 255, __VA_ARGS__); } } while (0)
+#define indexDebug(...) do { if (sDebugFlag & DEBUG_DEBUG) { taosPrintLog("INDEX ", DEBUG_DEBUG, sDebugFlag, __VA_ARGS__);} } while (0)
+#define indexTrace(...) do { if (sDebugFlag & DEBUG_TRACE) { taosPrintLog("INDEX ", DEBUG_TRACE, sDebugFlag, __VA_ARGS__);} } while (0)
+// clang-format on
 
 #define INDEX_TYPE_CONTAIN_EXTERN_TYPE(ty, exTy) (((ty >> 4) & (exTy)) != 0)
 
diff --git a/source/libs/index/src/index.c b/source/libs/index/src/index.c
index 162d64c41c472e88aa019b4b5def7727850c636d..2141e90bbd4678e588e354d30be12211c7ada6df 100644
--- a/source/libs/index/src/index.c
+++ b/source/libs/index/src/index.c
@@ -90,6 +90,15 @@ static void indexMergeCacheAndTFile(SArray* result, IterateValue* icache, Iterat
 // static int32_t indexSerialTermKey(SIndexTerm* itm, char* buf);
 // int32_t        indexSerialKey(ICacheKey* key, char* buf);
 
+static void indexPost(void* idx) {
+  SIndex* pIdx = idx;
+  tsem_post(&pIdx->sem);
+}
+static void indexWait(void* idx) {
+  SIndex* pIdx = idx;
+  tsem_wait(&pIdx->sem);
+}
+
 int indexOpen(SIndexOpts* opts, const char* path, SIndex** index) {
   taosThreadOnce(&isInit, indexInit);
   SIndex* sIdx = taosMemoryCalloc(1, sizeof(SIndex));
@@ -107,6 +116,8 @@ int indexOpen(SIndexOpts* opts, const char* path, SIndex** index) {
   sIdx->cVersion = 1;
   sIdx->path = tstrdup(path);
   taosThreadMutexInit(&sIdx->mtx, NULL);
+  tsem_init(&sIdx->sem, 0, 0);
+  // taosThreadCondInit(&sIdx->finished, NULL);
 
   sIdx->refId = indexAddRef(sIdx);
   indexAcquireRef(sIdx->refId);
@@ -124,16 +135,8 @@ END:
 
 void indexDestroy(void* handle) {
   SIndex* sIdx = handle;
-  void*   iter = taosHashIterate(sIdx->colObj, NULL);
-  while (iter) {
-    IndexCache** pCache = iter;
-    if (*pCache) {
-      indexCacheUnRef(*pCache);
-    }
-    iter = taosHashIterate(sIdx->colObj, iter);
-  }
-  taosHashCleanup(sIdx->colObj);
   taosThreadMutexDestroy(&sIdx->mtx);
+  tsem_destroy(&sIdx->sem);
   indexTFileDestroy(sIdx->tindex);
   taosMemoryFree(sIdx->path);
   taosMemoryFree(sIdx);
@@ -141,6 +144,20 @@ void indexDestroy(void* handle) {
 }
 void indexClose(SIndex* sIdx) {
   indexReleaseRef(sIdx->refId);
+  bool ref = 0;
+  if (sIdx->colObj != NULL) {
+    void* iter = taosHashIterate(sIdx->colObj, NULL);
+    while (iter) {
+      IndexCache** pCache = iter;
+      indexCacheForceToMerge((void*)(*pCache));
+      indexWait((void*)(sIdx));
+      iter = taosHashIterate(sIdx->colObj, iter);
+      indexCacheUnRef(*pCache);
+    }
+    taosHashCleanup(sIdx->colObj);
+    sIdx->colObj = NULL;
+  }
+  // taosMsleep(1000 * 5);
   indexRemoveRef(sIdx->refId);
 }
 int64_t indexAddRef(void* p) {
@@ -451,6 +468,18 @@ int indexFlushCacheToTFile(SIndex* sIdx, void* cache) {
   }
   // handle flush
   Iterate* cacheIter = indexCacheIteratorCreate(pCache);
+  if (cacheIter == NULL) {
+    indexError("%p immtable is empty, ignore merge opera", pCache);
+    indexCacheDestroyImm(pCache);
+    tfileReaderUnRef(pReader);
+    if (sIdx->quit) {
+      indexPost(sIdx);
+      // indexCacheBroadcast(pCache);
+    }
+    indexReleaseRef(sIdx->refId);
+    return 0;
+  }
+
   Iterate* tfileIter = tfileIteratorCreate(pReader);
   if (tfileIter == NULL) {
     indexWarn("empty tfile reader iterator");
@@ -506,7 +535,11 @@ int indexFlushCacheToTFile(SIndex* sIdx, void* cache) {
   } else {
     indexInfo("success to merge , time cost: %" PRId64 "ms", cost / 1000);
   }
+  if (sIdx->quit) {
+    indexPost(sIdx);
+  }
   indexReleaseRef(sIdx->refId);
+
   return ret;
 }
 void iterateValueDestroy(IterateValue* value, bool destroy) {
@@ -563,10 +596,11 @@ int32_t indexSerialCacheKey(ICacheKey* key, char* buf) {
   bool hasJson = INDEX_TYPE_CONTAIN_EXTERN_TYPE(key->colType, TSDB_DATA_TYPE_JSON);
 
   char* p = buf;
-  SERIALIZE_MEM_TO_BUF(buf, key, suid);
+  char  tbuf[65] = {0};
+  indexInt2str((int64_t)key->suid, tbuf, 0);
+
+  SERIALIZE_STR_VAR_TO_BUF(buf, tbuf, strlen(tbuf));
   SERIALIZE_VAR_TO_BUF(buf, '_', char);
-  // SERIALIZE_MEM_TO_BUF(buf, key, colType);
-  // SERIALIZE_VAR_TO_BUF(buf, '_', char);
   if (hasJson) {
     SERIALIZE_STR_VAR_TO_BUF(buf, JSON_COLUMN, strlen(JSON_COLUMN));
   } else {
diff --git a/source/libs/index/src/indexCache.c b/source/libs/index/src/indexCache.c
index 9a2e487df1f5880dba5472574199e0bdcfbb58be..232eca9304c0168a73d41298cb01d626e29302c9 100644
--- a/source/libs/index/src/indexCache.c
+++ b/source/libs/index/src/indexCache.c
@@ -23,6 +23,7 @@
 
 #define MEM_TERM_LIMIT     10 * 10000
 #define MEM_THRESHOLD      64 * 1024
+#define MEM_SIGNAL_QUIT    MEM_THRESHOLD * 20
 #define MEM_ESTIMATE_RADIO 1.5
 
 static void indexMemRef(MemTable* tbl);
@@ -385,7 +386,7 @@ void indexCacheDebug(IndexCache* cache) {
 
 void indexCacheDestroySkiplist(SSkipList* slt) {
   SSkipListIterator* iter = tSkipListCreateIter(slt);
-  while (tSkipListIterNext(iter)) {
+  while (iter != NULL && tSkipListIterNext(iter)) {
     SSkipListNode* node = tSkipListIterGet(iter);
     CacheTerm*     ct = (CacheTerm*)SL_GET_NODE_DATA(node);
     if (ct != NULL) {
@@ -396,17 +397,24 @@ void indexCacheDestroySkiplist(SSkipList* slt) {
   tSkipListDestroyIter(iter);
   tSkipListDestroy(slt);
 }
+void indexCacheBroadcast(void* cache) {
+  IndexCache* pCache = cache;
+  taosThreadCondBroadcast(&pCache->finished);
+}
+void indexCacheWait(void* cache) {
+  IndexCache* pCache = cache;
+  taosThreadCondWait(&pCache->finished, &pCache->mtx);
+}
 void indexCacheDestroyImm(IndexCache* cache) {
   if (cache == NULL) {
     return;
   }
-
   MemTable* tbl = NULL;
   taosThreadMutexLock(&cache->mtx);
 
   tbl = cache->imm;
   cache->imm = NULL;  // or throw int bg thread
-  taosThreadCondBroadcast(&cache->finished);
+  indexCacheBroadcast(cache);
 
   taosThreadMutexUnlock(&cache->mtx);
 
@@ -429,11 +437,13 @@ void indexCacheDestroy(void* cache) {
 }
 
 Iterate* indexCacheIteratorCreate(IndexCache* cache) {
+  if (cache->imm == NULL) {
+    return NULL;
+  }
   Iterate* iiter = taosMemoryCalloc(1, sizeof(Iterate));
   if (iiter == NULL) {
     return NULL;
   }
-
   taosThreadMutexLock(&cache->mtx);
 
   indexMemRef(cache->imm);
@@ -458,17 +468,16 @@ void indexCacheIteratorDestroy(Iterate* iter) {
   taosMemoryFree(iter);
 }
 
-int indexCacheSchedToMerge(IndexCache* pCache) {
+int indexCacheSchedToMerge(IndexCache* pCache, bool notify) {
   SSchedMsg schedMsg = {0};
   schedMsg.fp = doMergeWork;
   schedMsg.ahandle = pCache;
-  schedMsg.thandle = NULL;
-  // schedMsg.thandle = taosMemoryCalloc(1, sizeof(int64_t));
-  // memcpy((char*)(schedMsg.thandle), (char*)&(pCache->index->refId), sizeof(int64_t));
+  if (notify) {
+    schedMsg.thandle = taosMemoryMalloc(1);
+  }
   schedMsg.msg = NULL;
   indexAcquireRef(pCache->index->refId);
   taosScheduleTask(indexQhandle, &schedMsg);
-
   return 0;
 }
 
@@ -478,8 +487,10 @@ static void indexCacheMakeRoomForWrite(IndexCache* cache) {
       break;
     } else if (cache->imm != NULL) {
       // TODO: wake up by condition variable
-      taosThreadCondWait(&cache->finished, &cache->mtx);
+      indexCacheWait(cache);
     } else {
+      bool notifyQuit = cache->occupiedMem >= MEM_SIGNAL_QUIT ? true : false;
+
       indexCacheRef(cache);
       cache->imm = cache->mem;
       cache->mem = indexInternalCacheCreate(cache->type);
@@ -487,7 +498,7 @@ static void indexCacheMakeRoomForWrite(IndexCache* cache) {
       cache->occupiedMem = 0;
       // sched to merge
       // unref cache in bgwork
-      indexCacheSchedToMerge(cache);
+      indexCacheSchedToMerge(cache, notifyQuit);
     }
   }
 }
@@ -533,6 +544,19 @@ int indexCachePut(void* cache, SIndexTerm* term, uint64_t uid) {
   return 0;
   // encode end
 }
+void indexCacheForceToMerge(void* cache) {
+  IndexCache* pCache = cache;
+  indexCacheRef(pCache);
+  taosThreadMutexLock(&pCache->mtx);
+
+  indexInfo("%p is forced to merge into tfile", pCache);
+  pCache->occupiedMem += MEM_SIGNAL_QUIT;
+  indexCacheMakeRoomForWrite(pCache);
+
+  taosThreadMutexUnlock(&pCache->mtx);
+  indexCacheUnRef(pCache);
+  return;
+}
 int indexCacheDel(void* cache, const char* fieldValue, int32_t fvlen, uint64_t uid, int8_t operType) {
   IndexCache* pCache = cache;
   return 0;
@@ -691,6 +715,9 @@ static MemTable* indexInternalCacheCreate(int8_t type) {
 static void doMergeWork(SSchedMsg* msg) {
   IndexCache* pCache = msg->ahandle;
   SIndex*     sidx = (SIndex*)pCache->index;
+
+  sidx->quit = msg->thandle ? true : false;
+  taosMemoryFree(msg->thandle);
   indexFlushCacheToTFile(sidx, pCache);
 }
 static bool indexCacheIteratorNext(Iterate* itera) {
@@ -709,9 +736,6 @@ static bool indexCacheIteratorNext(Iterate* itera) {
     iv->type = ct->operaType;
     iv->ver = ct->version;
     iv->colVal = tstrdup(ct->colVal);
-    // printf("col Val: %s\n", iv->colVal);
-    // iv->colType = cv->colType;
-
     taosArrayPush(iv->val, &ct->uid);
   }
   return next;
diff --git a/source/libs/index/src/indexComm.c b/source/libs/index/src/indexComm.c
index 4c23e4ba4b9a89d124a93a434da27158891816bc..78c7babb681e44629281f0ffd6ea6ba835495b5b 100644
--- a/source/libs/index/src/indexComm.c
+++ b/source/libs/index/src/indexComm.c
@@ -22,6 +22,29 @@
 #include "ttypes.h"
 #include "tvariant.h"
 
+#define INDEX_DATA_BOOL_NULL      0x02
+#define INDEX_DATA_TINYINT_NULL   0x80
+#define INDEX_DATA_SMALLINT_NULL  0x8000
+#define INDEX_DATA_INT_NULL       0x80000000L
+#define INDEX_DATA_BIGINT_NULL    0x8000000000000000L
+#define INDEX_DATA_TIMESTAMP_NULL TSDB_DATA_BIGINT_NULL
+
+#define INDEX_DATA_FLOAT_NULL    0x7FF00000           // it is an NAN
+#define INDEX_DATA_DOUBLE_NULL   0x7FFFFF0000000000L  // an NAN
+#define INDEX_DATA_NCHAR_NULL    0xFFFFFFFF
+#define INDEX_DATA_BINARY_NULL   0xFF
+#define INDEX_DATA_JSON_NULL     0xFFFFFFFF
+#define INDEX_DATA_JSON_null     0xFFFFFFFE
+#define INDEX_DATA_JSON_NOT_NULL 0x01
+
+#define INDEX_DATA_UTINYINT_NULL  0xFF
+#define INDEX_DATA_USMALLINT_NULL 0xFFFF
+#define INDEX_DATA_UINT_NULL      0xFFFFFFFF
+#define INDEX_DATA_UBIGINT_NULL   0xFFFFFFFFFFFFFFFFL
+
+#define INDEX_DATA_NULL_STR   "NULL"
+#define INDEX_DATA_NULL_STR_L "null"
+
 char JSON_COLUMN[] = "JSON";
 char JSON_VALUE_DELIM = '&';
 
@@ -372,7 +395,7 @@ int32_t indexConvertDataToStr(void* src, int8_t type, void** dst) {
       tlen = taosEncodeBinary(NULL, varDataVal(src), varDataLen(src));
       *dst = taosMemoryCalloc(1, tlen + 1);
       tlen = taosEncodeBinary(dst, varDataVal(src), varDataLen(src));
-      *dst = (char*) * dst - tlen;
+      *dst = (char*)*dst - tlen;
       break;
     }
     case TSDB_DATA_TYPE_VARCHAR: {  // TSDB_DATA_TYPE_BINARY
diff --git a/source/libs/index/src/indexTfile.c b/source/libs/index/src/indexTfile.c
index 9fb6cf216e56dc4bdef2893a9eb47f0f39f56796..f5b3cbf2271112687e902fda1cb221cc45521563 100644
--- a/source/libs/index/src/indexTfile.c
+++ b/source/libs/index/src/indexTfile.c
@@ -171,7 +171,6 @@ void tfileCachePut(TFileCache* tcache, ICacheKey* key, TFileReader* reader) {
     oldReader->remove = true;
     tfileReaderUnRef(oldReader);
   }
-
   taosHashPut(tcache->tableCache, buf, sz, &reader, sizeof(void*));
   tfileReaderRef(reader);
   return;
@@ -499,15 +498,15 @@ static int32_t tfSearchCompareFunc_JSON(void* reader, SIndexTerm* tem, SIdxTempR
 int tfileReaderSearch(TFileReader* reader, SIndexTermQuery* query, SIdxTempResult* tr) {
   SIndexTerm*     term = query->term;
   EIndexQueryType qtype = query->qType;
-
+  int             ret = 0;
   if (INDEX_TYPE_CONTAIN_EXTERN_TYPE(term->colType, TSDB_DATA_TYPE_JSON)) {
-    return tfSearch[1][qtype](reader, term, tr);
+    ret = tfSearch[1][qtype](reader, term, tr);
   } else {
-    return tfSearch[0][qtype](reader, term, tr);
+    ret = tfSearch[0][qtype](reader, term, tr);
   }
 
   tfileReaderUnRef(reader);
-  return 0;
+  return ret;
 }
 
 TFileWriter* tfileWriterOpen(char* path, uint64_t suid, int32_t version, const char* colName, uint8_t colType) {
diff --git a/source/libs/index/test/indexTests.cc b/source/libs/index/test/indexTests.cc
index cff513b861863e7c89eb2dfbecb29f71f87578d0..11a25a798fb06f76c4597c193cac3dbf8710bea2 100644
--- a/source/libs/index/test/indexTests.cc
+++ b/source/libs/index/test/indexTests.cc
@@ -272,9 +272,26 @@ void validateFst() {
   }
   delete m;
 }
+static std::string logDir = "/tmp/log";
+
+static void initLog() {
+  const char*   defaultLogFileNamePrefix = "taoslog";
+  const int32_t maxLogFileNum = 10;
+
+  tsAsyncLog = 0;
+  sDebugFlag = 143;
+  strcpy(tsLogDir, logDir.c_str());
+  taosRemoveDir(tsLogDir);
+  taosMkDir(tsLogDir);
+
+  if (taosInitLog(defaultLogFileNamePrefix, maxLogFileNum) < 0) {
+    printf("failed to open log file in directory:%s\n", tsLogDir);
+  }
+}
 class IndexEnv : public ::testing::Test {
  protected:
   virtual void SetUp() {
+    initLog();
     taosRemoveDir(path);
     opts = indexOptsCreate();
     int ret = indexOpen(opts, path, &index);
@@ -804,7 +821,7 @@ class IndexObj {
   }
 
   ~IndexObj() {
-    indexCleanUp();
+    // indexCleanUp();
     indexClose(idx);
   }
 
@@ -817,7 +834,10 @@ class IndexObj {
 
 class IndexEnv2 : public ::testing::Test {
  protected:
-  virtual void SetUp() { index = new IndexObj(); }
+  virtual void SetUp() {
+    initLog();
+    index = new IndexObj();
+  }
   virtual void TearDown() { delete index; }
   IndexObj*    index;
 };
@@ -884,11 +904,34 @@ TEST_F(IndexEnv2, testIndexOpen) {
     SArray* result = (SArray*)taosArrayInit(1, sizeof(uint64_t));
     index->Search(mq, result);
     std::cout << "target size: " << taosArrayGetSize(result) << std::endl;
-    assert(taosArrayGetSize(result) == 400);
+    EXPECT_EQ(400, taosArrayGetSize(result));
     taosArrayDestroy(result);
     indexMultiTermQueryDestroy(mq);
   }
 }
+TEST_F(IndexEnv2, testEmptyIndexOpen) {
+  std::string path = "/tmp/test";
+  if (index->Init(path) != 0) {
+    std::cout << "failed to init index" << std::endl;
+    exit(1);
+  }
+
+  int targetSize = 1;
+  {
+    std::string colName("tag1"), colVal("Hello");
+
+    SIndexTerm*      term = indexTermCreate(0, ADD_VALUE, TSDB_DATA_TYPE_BINARY, colName.c_str(), colName.size(),
+                                       colVal.c_str(), colVal.size());
+    SIndexMultiTerm* terms = indexMultiTermCreate();
+    indexMultiTermAdd(terms, term);
+    for (size_t i = 0; i < targetSize; i++) {
+      int tableId = i;
+      int ret = index->Put(terms, tableId);
+      assert(ret == 0);
+    }
+    indexMultiTermDestroy(terms);
+  }
+}
 
 TEST_F(IndexEnv2, testIndex_TrigeFlush) {
   std::string path = TD_TMP_DIR_PATH "testxxx";
diff --git a/source/libs/transport/inc/transComm.h b/source/libs/transport/inc/transComm.h
index 3f82d6e2d85d2a345db7ed7a5bc2f1938a2eda62..e71e19edceedc32fa196fbdba37fb1d38ac62525 100644
--- a/source/libs/transport/inc/transComm.h
+++ b/source/libs/transport/inc/transComm.h
@@ -20,22 +20,12 @@ extern "C" {
 #endif
 
 #include <uv.h>
-#include "lz4.h"
 #include "os.h"
-#include "osSocket.h"
 #include "taoserror.h"
-#include "tglobal.h"
-#include "thash.h"
 #include "theap.h"
-#include "tidpool.h"
-#include "tmd5.h"
-#include "tmempool.h"
-#include "tmsg.h"
 #include "transLog.h"
 #include "transportInt.h"
-#include "tref.h"
 #include "trpc.h"
-#include "ttimer.h"
 #include "tutil.h"
 
 typedef void* queue[2];
@@ -108,27 +98,6 @@ typedef void* queue[2];
 #define TRANS_RETRY_INTERVAL    15  // ms retry interval
 #define TRANS_CONN_TIMEOUT      3   // connect timeout
 
-typedef struct {
-  SRpcInfo* pRpc;     // associated SRpcInfo
-  SEpSet    epSet;    // ip list provided by app
-  void*     ahandle;  // handle provided by app
-  // struct SRpcConn* pConn;     // pConn allocated
-  tmsg_t   msgType;  // message type
-  uint8_t* pCont;    // content provided by app
-  int32_t  contLen;  // content length
-  // int32_t  code;     // error code
-  // int16_t  numOfTry;  // number of try for different servers
-  // int8_t   oldInUse;  // server EP inUse passed by app
-  // int8_t   redirect;  // flag to indicate redirect
-  int8_t   connType;  // connection type
-  int64_t  rid;       // refId returned by taosAddRef
-  SRpcMsg* pRsp;      // for synchronous API
-  tsem_t*  pSem;      // for synchronous API
-  char*    ip;
-  uint32_t port;
-  // SEpSet*          pSet;      // for synchronous API
-} SRpcReqContext;
-
 typedef SRpcMsg      STransMsg;
 typedef SRpcCtx      STransCtx;
 typedef SRpcCtxVal   STransCtxVal;
diff --git a/source/libs/transport/inc/transportInt.h b/source/libs/transport/inc/transportInt.h
index a498571f33cb09cdf93cb04b3fd862dffa13bebd..8aeae1b5ade26a1a320dae37cbfe67f676f66eeb 100644
--- a/source/libs/transport/inc/transportInt.h
+++ b/source/libs/transport/inc/transportInt.h
@@ -22,15 +22,13 @@
 #include "lz4.h"
 #include "os.h"
 #include "taoserror.h"
-#include "tglobal.h"
 #include "thash.h"
-#include "tidpool.h"
+#include "tref.h"
 #include "tmsg.h"
 #include "transLog.h"
-#include "tref.h"
 #include "trpc.h"
-#include "ttimer.h"
 #include "tutil.h"
+#include "tglobal.h"
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/source/libs/transport/src/transSrv.c b/source/libs/transport/src/transSrv.c
index da83a6f37fc5b03cc880165d25689c918963ec7f..36f5cf98150e5636b43eb35b819d5bcd9288fe6a 100644
--- a/source/libs/transport/src/transSrv.c
+++ b/source/libs/transport/src/transSrv.c
@@ -295,14 +295,14 @@ static void uvHandleReq(SSrvConn* pConn) {
     // no ref here
   }
 
-  // if pHead->noResp = 1,
+  // pHead->noResp = 1,
   // 1. server application should not send resp on handle
   // 2. once send out data, cli conn released to conn pool immediately
   // 3. not mixed with persist
 
   transMsg.info.handle = (void*)uvAcquireExHandle(pConn->refId);
-  tTrace("server handle %p conn: %p translated to app, refId: %" PRIu64 "", transMsg.info.handle, pConn, pConn->refId);
   transMsg.info.refId = pConn->refId;
+  tTrace("server handle %p conn: %p translated to app, refId: %" PRIu64 "", transMsg.info.handle, pConn, pConn->refId);
   assert(transMsg.info.handle != NULL);
   if (pHead->noResp == 1) {
     transMsg.info.refId = -1;