diff --git a/src/client/src/tscParseInsert.c b/src/client/src/tscParseInsert.c
index f0c8ffebc2c30514b8ecb7727f963c3ce9007735..4400ca2c25b3c78971a66ebcf1aac425a1356c6a 100644
--- a/src/client/src/tscParseInsert.c
+++ b/src/client/src/tscParseInsert.c
@@ -891,11 +891,15 @@ static int32_t tscCheckIfCreateTable(char **sqlstr, SSqlObj *pSql) {
       return tscInvalidSQLErrMsg(pCmd->payload, "keyword TAGS expected", sToken.z);
     }
 
+    SKVRowBuilder kvRowBuilder = {0};
+    if (tdInitKVRowBuilder(&kvRowBuilder) < 0) {
+      return TSDB_CODE_TSC_OUT_OF_MEMORY;
+    }
+
     uint32_t ignoreTokenTypes = TK_LP;
     uint32_t numOfIgnoreToken = 1;
     for (int i = 0; i < spd.numOfAssignedCols; ++i) {
-      char *  tagVal = pTag->data + spd.elems[i].offset;
-      int16_t colIndex = spd.elems[i].colIndex;
+      SSchema* pSchema = pTagSchema + spd.elems[i].colIndex;
 
       index = 0;
       sToken = tStrGetToken(sql, &index, true, numOfIgnoreToken, &ignoreTokenTypes);
@@ -911,12 +915,26 @@ static int32_t tscCheckIfCreateTable(char **sqlstr, SSqlObj *pSql) {
         sToken.n -= 2;
       }
 
-      code = tsParseOneColumnData(&pTagSchema[colIndex], &sToken, tagVal, pCmd->payload, &sql, false, tinfo.precision);
+      char tagVal[TSDB_MAX_TAGS_LEN];
+      code = tsParseOneColumnData(pSchema, &sToken, tagVal, pCmd->payload, &sql, false, tinfo.precision);
       if (code != TSDB_CODE_SUCCESS) {
+        tdDestroyKVRowBuilder(&kvRowBuilder);
         return code;
       }
+
+      tdAddColToKVRow(&kvRowBuilder, pSchema->colId, pSchema->type, tagVal);
     }
 
+    SKVRow row = tdGetKVRowFromBuilder(&kvRowBuilder);
+    tdDestroyKVRowBuilder(&kvRowBuilder);
+    if (row == NULL) {
+      return TSDB_CODE_TSC_OUT_OF_MEMORY;
+    }
+    tdSortKVRowByColIdx(row);
+    pTag->dataLen = kvRowLen(row);
+    kvRowCpy(pTag->data, row);
+    free(row);
+
     index = 0;
     sToken = tStrGetToken(sql, &index, false, 0, NULL);
     sql += index;
@@ -924,29 +942,7 @@ static int32_t tscCheckIfCreateTable(char **sqlstr, SSqlObj *pSql) {
       return tscInvalidSQLErrMsg(pCmd->payload, ") expected", sToken.z);
     }
 
-    // 2. set the null value for the columns that do not assign values
-    if (spd.numOfAssignedCols < spd.numOfCols) {
-      char *ptr = pTag->data;
-
-      for (int32_t i = 0; i < spd.numOfCols; ++i) {
-        if (!spd.hasVal[i]) {  // current tag column do not have any value to insert, set it to null
-          if (pTagSchema[i].type == TSDB_DATA_TYPE_BINARY || pTagSchema[i].type == TSDB_DATA_TYPE_NCHAR) {
-            setVardataNull(ptr, pTagSchema[i].type);
-          } else {
-            setNull(ptr, pTagSchema[i].type, pTagSchema[i].bytes);
-          }
-        }
-
-        ptr += pTagSchema[i].bytes;
-      }
-    }
-
-    // 3. calculate the actual data size of STagData
-    pCmd->payloadLen = sizeof(pTag->name) + sizeof(pTag->dataLen);
-    for (int32_t t = 0; t < numOfTags; ++t) {
-      pTag->dataLen += pTagSchema[t].bytes;
-      pCmd->payloadLen += pTagSchema[t].bytes;
-    }
+    pCmd->payloadLen = sizeof(pTag->name) + sizeof(pTag->dataLen) + pTag->dataLen;
     pTag->dataLen = htonl(pTag->dataLen);
 
     if (tscValidateName(&tableToken) != TSDB_CODE_SUCCESS) {
diff --git a/src/client/src/tscSQLParser.c b/src/client/src/tscSQLParser.c
index df18d7a56baa42d3286df29e156b1317c3e942cf..9f557f5529e03ee504aea2c30cc6bfac113a06aa 100644
--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -5623,24 +5623,41 @@ int32_t doCheckForCreateFromStable(SSqlObj* pSql, SSqlInfo* pInfo) {
   SSchema* pTagSchema = tscGetTableTagSchema(pStableMeterMetaInfo->pTableMeta);
 
   STagData* pTag = &pCreateTable->usingInfo.tagdata;
-  char* tagVal = pTag->data;
+  SKVRowBuilder kvRowBuilder = {0};
+  if (tdInitKVRowBuilder(&kvRowBuilder) < 0) {
+    return TSDB_CODE_TSC_OUT_OF_MEMORY;
+  }
+
   int32_t ret = TSDB_CODE_SUCCESS;
-  
   for (int32_t i = 0; i < pList->nExpr; ++i) {
-    if (pTagSchema[i].type == TSDB_DATA_TYPE_BINARY || pTagSchema[i].type == TSDB_DATA_TYPE_NCHAR) {
+    SSchema* pSchema = pTagSchema + i;
+    if (pSchema->type == TSDB_DATA_TYPE_BINARY || pSchema->type == TSDB_DATA_TYPE_NCHAR) {
       // validate the length of binary
-      if (pList->a[i].pVar.nLen + VARSTR_HEADER_SIZE > pTagSchema[i].bytes) {
+      if (pList->a[i].pVar.nLen + VARSTR_HEADER_SIZE > pSchema->bytes) {
+        tdDestroyKVRowBuilder(&kvRowBuilder);
         return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg3);
       }
     }
     
-    ret = tVariantDump(&(pList->a[i].pVar), tagVal, pTagSchema[i].type, true);
+    char tagVal[TSDB_MAX_TAGS_LEN];
+    ret = tVariantDump(&(pList->a[i].pVar), tagVal, pSchema->type, true);
     if (ret != TSDB_CODE_SUCCESS) {
+      tdDestroyKVRowBuilder(&kvRowBuilder);
       return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg4);
     }
 
-    tagVal += pTagSchema[i].bytes;
+    tdAddColToKVRow(&kvRowBuilder, pSchema->colId, pSchema->type, tagVal);
+  }
+
+  SKVRow row = tdGetKVRowFromBuilder(&kvRowBuilder);
+  tdDestroyKVRowBuilder(&kvRowBuilder);
+  if (row == NULL) {
+    return TSDB_CODE_TSC_OUT_OF_MEMORY;
   }
+  tdSortKVRowByColIdx(row);
+  pTag->dataLen = kvRowLen(row);
+  kvRowCpy(pTag->data, row);
+  free(row);
 
   // table name
   if (tscValidateName(&pInfo->pCreateTableInfo->name) != TSDB_CODE_SUCCESS) {
@@ -5653,7 +5670,6 @@ int32_t doCheckForCreateFromStable(SSqlObj* pSql, SSqlInfo* pInfo) {
     return ret;
   }
 
-  pTag->dataLen = tagVal - pTag->data;
   return TSDB_CODE_SUCCESS;
 }
 
diff --git a/src/client/src/tscUtil.c b/src/client/src/tscUtil.c
index 259bcd4cbd2e63f52c33f072908ef647731d750e..26a81c597f077e5101b3920e792c650d00ca50f3 100644
--- a/src/client/src/tscUtil.c
+++ b/src/client/src/tscUtil.c
@@ -625,18 +625,31 @@ static int trimDataBlock(void* pDataBlock, STableDataBlocks* pTableDataBlock, bo
   return len;
 }
 
+static int32_t getRowExpandSize(STableMeta* pTableMeta) {
+  int32_t result = TD_DATA_ROW_HEAD_SIZE;
+  int32_t columns = tscGetNumOfColumns(pTableMeta);
+  SSchema* pSchema = tscGetTableSchema(pTableMeta);
+  for(int32_t i = 0; i < columns; i++) {
+    if (IS_VAR_DATA_TYPE((pSchema + i)->type)) {
+      result += TYPE_BYTES[TSDB_DATA_TYPE_BINARY];
+    }
+  }
+  return result;
+}
+
 int32_t tscMergeTableDataBlocks(SSqlObj* pSql, SArray* pTableDataBlockList) {
   SSqlCmd* pCmd = &pSql->cmd;
 
   // the maximum expanded size in byte when a row-wise data is converted to SDataRow format
-  const int32_t MAX_EXPAND_SIZE = TD_DATA_ROW_HEAD_SIZE + TYPE_BYTES[TSDB_DATA_TYPE_BINARY];
+  STableDataBlocks* pOneTableBlock = taosArrayGetP(pTableDataBlockList, 0);
+  int32_t expandSize = getRowExpandSize(pOneTableBlock->pTableMeta);
 
   void* pVnodeDataBlockHashList = taosHashInit(128, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BIGINT), false);
   SArray* pVnodeDataBlockList = taosArrayInit(8, POINTER_BYTES);
 
   size_t total = taosArrayGetSize(pTableDataBlockList);
   for (int32_t i = 0; i < total; ++i) {
-    STableDataBlocks* pOneTableBlock = taosArrayGetP(pTableDataBlockList, i);
+    pOneTableBlock = taosArrayGetP(pTableDataBlockList, i);
     STableDataBlocks* dataBuf = NULL;
     
     int32_t ret =
@@ -650,7 +663,7 @@ int32_t tscMergeTableDataBlocks(SSqlObj* pSql, SArray* pTableDataBlockList) {
     }
 
     SSubmitBlk* pBlocks = (SSubmitBlk*) pOneTableBlock->pData;
-    int64_t destSize = dataBuf->size + pOneTableBlock->size + pBlocks->numOfRows * MAX_EXPAND_SIZE;
+    int64_t destSize = dataBuf->size + pOneTableBlock->size + pBlocks->numOfRows * expandSize;
 
     if (dataBuf->nAllocSize < destSize) {
       while (dataBuf->nAllocSize < destSize) {
@@ -678,8 +691,7 @@ int32_t tscMergeTableDataBlocks(SSqlObj* pSql, SArray* pTableDataBlockList) {
     tscDebug("%p tableId:%s, sid:%d rows:%d sversion:%d skey:%" PRId64 ", ekey:%" PRId64, pSql, pOneTableBlock->tableId,
         pBlocks->tid, pBlocks->numOfRows, pBlocks->sversion, GET_INT64_VAL(pBlocks->data), GET_INT64_VAL(ekey));
 
-
-    int32_t len = pBlocks->numOfRows * (pOneTableBlock->rowSize + MAX_EXPAND_SIZE);
+    int32_t len = pBlocks->numOfRows * (pOneTableBlock->rowSize + expandSize);
 
     pBlocks->tid = htonl(pBlocks->tid);
     pBlocks->uid = htobe64(pBlocks->uid);
diff --git a/src/common/inc/tdataformat.h b/src/common/inc/tdataformat.h
index 1cd72eafdedd512bb2d675613b178252efe5d5b2..baa212d8b76fd07625c19c49299efa77fb58768c 100644
--- a/src/common/inc/tdataformat.h
+++ b/src/common/inc/tdataformat.h
@@ -272,7 +272,7 @@ typedef struct {
   int16_t offset;
 } SColIdx;
 
-#define TD_KV_ROW_HEAD_SIZE 2 * sizeof(int16_t)
+#define TD_KV_ROW_HEAD_SIZE (2 * sizeof(int16_t))
 
 #define kvRowLen(r) (*(int16_t *)(r))
 #define kvRowNCols(r) (*(int16_t *)POINTER_SHIFT(r, sizeof(int16_t)))
@@ -290,6 +290,7 @@ SKVRow tdKVRowDup(SKVRow row);
 int    tdSetKVRowDataOfCol(SKVRow *orow, int16_t colId, int8_t type, void *value);
 int    tdEncodeKVRow(void **buf, SKVRow row);
 void * tdDecodeKVRow(void *buf, SKVRow *row);
+void   tdSortKVRowByColIdx(SKVRow row);
 
 static FORCE_INLINE int comparTagId(const void *key1, const void *key2) {
   if (*(int16_t *)key1 > ((SColIdx *)key2)->colId) {
diff --git a/src/common/src/tdataformat.c b/src/common/src/tdataformat.c
index d7b2af870677ba1d96286b5dc9b29137369251ca..e5cbcfd143c642f7bc871e12d833cdcf544536be 100644
--- a/src/common/src/tdataformat.c
+++ b/src/common/src/tdataformat.c
@@ -515,6 +515,22 @@ SKVRow tdKVRowDup(SKVRow row) {
   return trow;
 }
 
+static int compareColIdx(const void* a, const void* b) {
+  const SColIdx* x = (const SColIdx*)a;
+  const SColIdx* y = (const SColIdx*)b;
+  if (x->colId > y->colId) {
+    return 1;
+  }
+  if (x->colId < y->colId) {
+    return -1;
+  }
+  return 0;
+}
+
+void tdSortKVRowByColIdx(SKVRow row) {
+  qsort(kvRowColIdx(row), kvRowNCols(row), sizeof(SColIdx), compareColIdx);
+}
+
 int tdSetKVRowDataOfCol(SKVRow *orow, int16_t colId, int8_t type, void *value) {
   SColIdx *pColIdx = NULL;
   SKVRow   row = *orow;
diff --git a/src/common/src/ttypes.c b/src/common/src/ttypes.c
index 3c63e2deacc88aed967508a6affc44b1bc7d85ca..eff25e8c93047a174dddeb1f4b281942e94959cb 100644
--- a/src/common/src/ttypes.c
+++ b/src/common/src/ttypes.c
@@ -464,6 +464,29 @@ void setNullN(char *val, int32_t type, int32_t bytes, int32_t numOfElems) {
   }
 }
 
+static uint8_t  nullBool = TSDB_DATA_BOOL_NULL;
+static uint8_t  nullTinyInt = TSDB_DATA_TINYINT_NULL;
+static uint16_t nullSmallInt = TSDB_DATA_SMALLINT_NULL;
+static uint32_t nullInt = TSDB_DATA_INT_NULL;
+static uint64_t nullBigInt = TSDB_DATA_BIGINT_NULL;
+static uint32_t nullFloat = TSDB_DATA_FLOAT_NULL;
+static uint64_t nullDouble = TSDB_DATA_DOUBLE_NULL;
+
+static union {
+  tstr str;
+  char pad[sizeof(tstr) + 4];
+} nullBinary = {.str = {.len = 1}}, nullNchar = {.str = {.len = 4}};
+
+static void *nullValues[] = {
+    &nullBool,  &nullTinyInt, &nullSmallInt, &nullInt,    &nullBigInt,
+    &nullFloat, &nullDouble,  &nullBinary,   &nullBigInt, &nullNchar,
+};
+
+void *getNullValue(int32_t type) {
+  assert(type >= TSDB_DATA_TYPE_BOOL && type <= TSDB_DATA_TYPE_NCHAR);
+  return nullValues[type - 1];
+}
+
 void assignVal(char *val, const char *src, int32_t len, int32_t type) {
   switch (type) {
     case TSDB_DATA_TYPE_INT: {
diff --git a/src/cq/src/cqMain.c b/src/cq/src/cqMain.c
index 098d69fcb206acbd5ec88d66cc1c3b9c347d02ba..3e7e8525efc90bbe877e8636a34ded4851805ace 100644
--- a/src/cq/src/cqMain.c
+++ b/src/cq/src/cqMain.c
@@ -256,30 +256,13 @@ static void cqProcessStreamRes(void *param, TAOS_RES *tres, TAOS_ROW row) {
   SDataRow trow = (SDataRow)pBlk->data;
   tdInitDataRow(trow, pSchema);
 
-  union {
-    char buf[sizeof(int64_t)];
-    tstr str;
-  } nullVal;
-
   for (int32_t i = 0; i < pSchema->numOfCols; i++) {
     STColumn *c = pSchema->columns + i;
-    char* val = (char*)row[i];
-    if (IS_VAR_DATA_TYPE(c->type)) {
-      if (val == NULL) {
-        val = nullVal.buf;
-        if (c->type == TSDB_DATA_TYPE_BINARY) {
-          setNull(nullVal.str.data, TSDB_DATA_TYPE_BINARY, 1);
-          nullVal.str.len = 1;
-        } else {
-          setNull(nullVal.str.data, TSDB_DATA_TYPE_NCHAR, 4);
-          nullVal.str.len = 4;
-        }
-      } else {
-        val -= sizeof(VarDataLenT);
-      }
-    } else if (val == NULL) {
-      val = nullVal.buf;
-      setNull(val, c->type, c->bytes);
+    void* val = row[i];
+    if (val == NULL) {
+      val = getNullValue(c->type);
+    } else if (IS_VAR_DATA_TYPE(c->type)) {
+      val = ((char*)val) - sizeof(VarDataLenT);
     }
     tdAppendColVal(trow, val, c->type, c->bytes, c->offset);
   }
diff --git a/src/inc/taosdef.h b/src/inc/taosdef.h
index ecf78edfd5725b7ae701bbf100d6b422b65f04fc..76ca99c9ad26bb9228cd1d94cf463657bf1a5f8f 100644
--- a/src/inc/taosdef.h
+++ b/src/inc/taosdef.h
@@ -165,6 +165,7 @@ bool isNull(const char *val, int32_t type);
 void setVardataNull(char* val, int32_t type);
 void setNull(char *val, int32_t type, int32_t bytes);
 void setNullN(char *val, int32_t type, int32_t bytes, int32_t numOfElems);
+void* getNullValue(int32_t type);
 
 void assignVal(char *val, const char *src, int32_t len, int32_t type);
 void tsDataSwap(void *pLeft, void *pRight, int32_t type, int32_t size);
diff --git a/src/inc/taosmsg.h b/src/inc/taosmsg.h
index 13fa799b3fedaba096467757746f59b9a15a8ec6..cb25242d27d3f8e50af643df3c447c7aaae76484 100644
--- a/src/inc/taosmsg.h
+++ b/src/inc/taosmsg.h
@@ -26,6 +26,7 @@ extern "C" {
 #include "taosdef.h"
 #include "taoserror.h"
 #include "trpc.h"
+#include "tdataformat.h"
 
 // message type
 
@@ -674,7 +675,7 @@ typedef struct SMultiTableMeta {
 typedef struct {
   int32_t dataLen;
   char name[TSDB_TABLE_ID_LEN];
-  char data[TSDB_MAX_TAGS_LEN];
+  char data[TSDB_MAX_TAGS_LEN + TD_KV_ROW_HEAD_SIZE + sizeof(SColIdx) * TSDB_MAX_TAGS];
 } STagData;
 
 /*
diff --git a/src/plugins/http/src/httpContext.c b/src/plugins/http/src/httpContext.c
index b078be59300a2390246b905ca5f2156464e34f74..b09f34b562294e13f9ee7e9e728f1ad974f8c9b1 100644
--- a/src/plugins/http/src/httpContext.c
+++ b/src/plugins/http/src/httpContext.c
@@ -141,10 +141,15 @@ HttpContext *httpGetContext(void *ptr) {
 void httpReleaseContext(HttpContext *pContext) {
   int32_t refCount = atomic_sub_fetch_32(&pContext->refCount, 1);
   assert(refCount >= 0);
-  httpDebug("context:%p, fd:%d, is releasd, refCount:%d", pContext, pContext->fd, refCount);
+  httpDebug("context:%p, is releasd, refCount:%d", pContext, refCount);
 
   HttpContext **ppContext = pContext->ppContext;
-  taosCacheRelease(tsHttpServer.contextCache, (void **)(&ppContext), false);
+  if (tsHttpServer.contextCache != NULL) {
+    taosCacheRelease(tsHttpServer.contextCache, (void **)(&ppContext), false);
+  } else {
+    httpDebug("context:%p, won't be destroyed for cache is already released", pContext);
+    // httpDestroyContext((void **)(&ppContext));
+  }
 }
 
 bool httpInitContext(HttpContext *pContext) {
diff --git a/src/plugins/http/src/httpHandle.c b/src/plugins/http/src/httpHandle.c
index 758286344a357ea42e2025aabebe9c6550750cf1..056fe425d4a8db454c8141aa4cae775f6fe2bd6f 100644
--- a/src/plugins/http/src/httpHandle.c
+++ b/src/plugins/http/src/httpHandle.c
@@ -157,7 +157,7 @@ bool httpGetHttpMethod(HttpContext* pContext) {
   pParser->method.pos[pParser->method.len] = 0;
   pParser->pLast = pSeek + 1;
 
-  httpDebug("context:%p, fd:%d, ip:%s, httpMethod:%s", pContext, pContext->fd, pContext->ipstr, pParser->method.pos);
+  httpTrace("context:%p, fd:%d, ip:%s, httpMethod:%s", pContext, pContext->fd, pContext->ipstr, pParser->method.pos);
   return true;
 }
 
@@ -186,23 +186,23 @@ bool httpParseHead(HttpContext* pContext) {
   HttpParser* pParser = &pContext->parser;
   if (strncasecmp(pParser->pLast, "Content-Length: ", 16) == 0) {
     pParser->data.len = (int32_t)atoi(pParser->pLast + 16);
-    httpDebug("context:%p, fd:%d, ip:%s, Content-Length:%d", pContext, pContext->fd, pContext->ipstr,
+    httpTrace("context:%p, fd:%d, ip:%s, Content-Length:%d", pContext, pContext->fd, pContext->ipstr,
               pParser->data.len);
   } else if (strncasecmp(pParser->pLast, "Accept-Encoding: ", 17) == 0) {
     if (tsHttpEnableCompress && strstr(pParser->pLast + 17, "gzip") != NULL) {
       pContext->acceptEncoding = HTTP_COMPRESS_GZIP;
-      httpDebug("context:%p, fd:%d, ip:%s, Accept-Encoding:gzip", pContext, pContext->fd, pContext->ipstr);
+      httpTrace("context:%p, fd:%d, ip:%s, Accept-Encoding:gzip", pContext, pContext->fd, pContext->ipstr);
     } else {
       pContext->acceptEncoding = HTTP_COMPRESS_IDENTITY;
-      httpDebug("context:%p, fd:%d, ip:%s, Accept-Encoding:identity", pContext, pContext->fd, pContext->ipstr);
+      httpTrace("context:%p, fd:%d, ip:%s, Accept-Encoding:identity", pContext, pContext->fd, pContext->ipstr);
     }
   } else if (strncasecmp(pParser->pLast, "Content-Encoding: ", 18) == 0) {
     if (strstr(pParser->pLast + 18, "gzip") != NULL) {
       pContext->contentEncoding = HTTP_COMPRESS_GZIP;
-      httpDebug("context:%p, fd:%d, ip:%s, Content-Encoding:gzip", pContext, pContext->fd, pContext->ipstr);
+      httpTrace("context:%p, fd:%d, ip:%s, Content-Encoding:gzip", pContext, pContext->fd, pContext->ipstr);
     } else {
       pContext->contentEncoding = HTTP_COMPRESS_IDENTITY;
-      httpDebug("context:%p, fd:%d, ip:%s, Content-Encoding:identity", pContext, pContext->fd, pContext->ipstr);
+      httpTrace("context:%p, fd:%d, ip:%s, Content-Encoding:identity", pContext, pContext->fd, pContext->ipstr);
     }
   } else if (strncasecmp(pParser->pLast, "Connection: ", 12) == 0) {
     if (strncasecmp(pParser->pLast + 12, "Keep-Alive", 10) == 0) {
@@ -210,7 +210,7 @@ bool httpParseHead(HttpContext* pContext) {
     } else {
       pContext->httpKeepAlive = HTTP_KEEPALIVE_DISABLE;
     }
-    httpDebug("context:%p, fd:%d, ip:%s, keepAlive:%d", pContext, pContext->fd, pContext->ipstr,
+    httpTrace("context:%p, fd:%d, ip:%s, keepAlive:%d", pContext, pContext->fd, pContext->ipstr,
               pContext->httpKeepAlive);
   } else if (strncasecmp(pParser->pLast, "Transfer-Encoding: ", 19) == 0) {
     if (strncasecmp(pParser->pLast + 19, "chunked", 7) == 0) {
@@ -281,7 +281,7 @@ bool httpReadChunkedBody(HttpContext* pContext, HttpParser* pParser) {
     httpParseChunkedBody(pContext, pParser, false);
     return HTTP_CHECK_BODY_SUCCESS;
   } else {
-    httpDebug("context:%p, fd:%d, ip:%s, chunked body not finished, continue read", pContext, pContext->fd, pContext->ipstr);
+    httpTrace("context:%p, fd:%d, ip:%s, chunked body not finished, continue read", pContext, pContext->fd, pContext->ipstr);
     if (!httpReadDataImp(pContext)) {
       httpError("context:%p, fd:%d, ip:%s, read chunked request error", pContext, pContext->fd, pContext->ipstr);
       return HTTP_CHECK_BODY_ERROR;
@@ -299,7 +299,7 @@ int httpReadUnChunkedBody(HttpContext* pContext, HttpParser* pParser) {
     httpSendErrorResp(pContext, HTTP_PARSE_BODY_ERROR);
     return HTTP_CHECK_BODY_ERROR;
   } else if (dataReadLen < pParser->data.len) {
-    httpDebug("context:%p, fd:%d, ip:%s, un-chunked body not finished, read size:%d dataReadLen:%d < pContext->data.len:%d, continue read",
+    httpTrace("context:%p, fd:%d, ip:%s, un-chunked body not finished, read size:%d dataReadLen:%d < pContext->data.len:%d, continue read",
               pContext, pContext->fd, pContext->ipstr, pContext->parser.bufsize, dataReadLen, pParser->data.len);
     return HTTP_CHECK_BODY_CONTINUE;
   } else {
@@ -313,9 +313,9 @@ bool httpParseRequest(HttpContext* pContext) {
     return true;
   }
 
-  httpDebug("context:%p, fd:%d, ip:%s, thread:%s, numOfFds:%d, read size:%d, raw data:\n%s",
-           pContext, pContext->fd, pContext->ipstr, pContext->pThread->label, pContext->pThread->numOfFds,
-           pContext->parser.bufsize, pContext->parser.buffer);
+  httpTraceDump("context:%p, fd:%d, ip:%s, thread:%s, numOfFds:%d, read size:%d, raw data:\n%s", pContext, pContext->fd,
+                pContext->ipstr, pContext->pThread->label, pContext->pThread->numOfFds, pContext->parser.bufsize,
+                pContext->parser.buffer);
 
   if (!httpGetHttpMethod(pContext)) {
     return false;
diff --git a/src/plugins/http/src/httpJson.c b/src/plugins/http/src/httpJson.c
index 319d87d49690e9ca863453191a84b721f768cfd5..9276637d0ee99001d3ec2fc9f50626398a12ee24 100644
--- a/src/plugins/http/src/httpJson.c
+++ b/src/plugins/http/src/httpJson.c
@@ -76,8 +76,8 @@ int httpWriteBuf(struct HttpContext *pContext, const char *buf, int sz) {
     httpError("context:%p, fd:%d, ip:%s, dataSize:%d, writeSize:%d, failed to send response:\n%s",
               pContext, pContext->fd, pContext->ipstr, sz, writeSz, buf);
   } else {
-    httpDebug("context:%p, fd:%d, ip:%s, dataSize:%d, writeSize:%d, response:\n%s",
-              pContext, pContext->fd, pContext->ipstr, sz, writeSz, buf);
+    httpTrace("context:%p, fd:%d, ip:%s, dataSize:%d, writeSize:%d, response:\n%s", pContext, pContext->fd,
+              pContext->ipstr, sz, writeSz, buf);
   }
 
   return writeSz;
@@ -99,7 +99,7 @@ int httpWriteJsonBufBody(JsonBuf* buf, bool isTheLast) {
   uint64_t srcLen = (uint64_t) (buf->lst - buf->buf);
 
   if (buf->pContext->fd <= 0) {
-    httpDebug("context:%p, fd:%d, ip:%s, write json body error", buf->pContext, buf->pContext->fd, buf->pContext->ipstr);
+    httpTrace("context:%p, fd:%d, ip:%s, write json body error", buf->pContext, buf->pContext->fd, buf->pContext->ipstr);
     buf->pContext->fd = -1;
   }
 
@@ -113,11 +113,11 @@ int httpWriteJsonBufBody(JsonBuf* buf, bool isTheLast) {
 
   if (buf->pContext->acceptEncoding == HTTP_COMPRESS_IDENTITY) {
     if (buf->lst == buf->buf) {
-      httpDebug("context:%p, fd:%d, ip:%s, no data need dump", buf->pContext, buf->pContext->fd, buf->pContext->ipstr);
+      httpTrace("context:%p, fd:%d, ip:%s, no data need dump", buf->pContext, buf->pContext->fd, buf->pContext->ipstr);
       return 0;  // there is no data to dump.
     } else {
       int len = sprintf(sLen, "%lx\r\n", srcLen);
-      httpDebug("context:%p, fd:%d, ip:%s, write body, chunkSize:%" PRIu64 ", response:\n%s",
+      httpTrace("context:%p, fd:%d, ip:%s, write body, chunkSize:%" PRIu64 ", response:\n%s",
                 buf->pContext, buf->pContext->fd, buf->pContext->ipstr, srcLen, buf->buf);
       httpWriteBufNoTrace(buf->pContext, sLen, len);
       remain = httpWriteBufNoTrace(buf->pContext, buf->buf, (int) srcLen);
@@ -129,12 +129,12 @@ int httpWriteJsonBufBody(JsonBuf* buf, bool isTheLast) {
     if (ret == 0) {
       if (compressBufLen > 0) {
         int len = sprintf(sLen, "%x\r\n", compressBufLen);
-        httpDebug("context:%p, fd:%d, ip:%s, write body, chunkSize:%" PRIu64 ", compressSize:%d, last:%d, response:\n%s",
+        httpTrace("context:%p, fd:%d, ip:%s, write body, chunkSize:%" PRIu64 ", compressSize:%d, last:%d, response:\n%s",
                   buf->pContext, buf->pContext->fd, buf->pContext->ipstr, srcLen, compressBufLen, isTheLast, buf->buf);
         httpWriteBufNoTrace(buf->pContext, sLen, len);
         remain = httpWriteBufNoTrace(buf->pContext, (const char *) compressBuf, (int) compressBufLen);
       } else {
-        httpDebug("context:%p, fd:%d, ip:%s, last:%d, compress already dumped, response:\n%s",
+        httpTrace("context:%p, fd:%d, ip:%s, last:%d, compress already dumped, response:\n%s",
                 buf->pContext, buf->pContext->fd, buf->pContext->ipstr, isTheLast, buf->buf);
         return 0;  // there is no data to dump.
       }
@@ -173,7 +173,7 @@ void httpWriteJsonBufHead(JsonBuf* buf) {
 
 void httpWriteJsonBufEnd(JsonBuf* buf) {
   if (buf->pContext->fd <= 0) {
-    httpDebug("context:%p, fd:%d, ip:%s, json buf fd is 0", buf->pContext, buf->pContext->fd, buf->pContext->ipstr);
+    httpTrace("context:%p, fd:%d, ip:%s, json buf fd is 0", buf->pContext, buf->pContext->fd, buf->pContext->ipstr);
     buf->pContext->fd = -1;
   }
 
diff --git a/src/plugins/http/src/httpServer.c b/src/plugins/http/src/httpServer.c
index cef0e806903244bb90e7c53062101ee25fd661b9..6c82386d8187410544219456368be0b399928207 100644
--- a/src/plugins/http/src/httpServer.c
+++ b/src/plugins/http/src/httpServer.c
@@ -66,8 +66,6 @@ void httpCleanUpConnect() {
     }
   }
 
-  tfree(pServer->pThreads);
-  pServer->pThreads = NULL;
   httpDebug("http server:%s is cleaned up", pServer->label);
 }
 
diff --git a/src/plugins/http/src/httpSystem.c b/src/plugins/http/src/httpSystem.c
index a93e7cd7ad0147b831ca5f8e961a0a53f6da56d2..3a0998f2e8ee4d03ee7db7c083cf79d63acfaeb3 100644
--- a/src/plugins/http/src/httpSystem.c
+++ b/src/plugins/http/src/httpSystem.c
@@ -95,11 +95,13 @@ void httpCleanUpSystem() {
   httpInfo("http server cleanup");
   httpStopSystem();
 
+  httpCleanUpConnect();
   httpCleanupContexts();
   httpCleanUpSessions();
-  httpCleanUpConnect();
   pthread_mutex_destroy(&tsHttpServer.serverMutex);
-
+  tfree(tsHttpServer.pThreads);
+  tsHttpServer.pThreads = NULL;
+  
   tsHttpServer.status = HTTP_SERVER_CLOSED;
 }
 
diff --git a/src/tsdb/src/tsdbMeta.c b/src/tsdb/src/tsdbMeta.c
index ebc83d0cc268152ef4ca6132ff1cb3de89d1140d..9c9ac1699a38f1545de273b41792ecb32677b812 100644
--- a/src/tsdb/src/tsdbMeta.c
+++ b/src/tsdb/src/tsdbMeta.c
@@ -233,26 +233,10 @@ STableCfg *tsdbCreateTableCfgFromMsg(SMDCreateTableMsg *pMsg) {
     if (tsdbTableSetSName(pCfg, pMsg->superTableId, true) < 0) goto _err;
     if (tsdbTableSetSuperUid(pCfg, htobe64(pMsg->superTableUid)) < 0) goto _err;
 
-    // Decode tag values
-    if (pMsg->tagDataLen) {
-      int   accBytes = 0;
+    int32_t tagDataLen = htonl(pMsg->tagDataLen);
+    if (tagDataLen) {
       char *pTagData = pMsg->data + (numOfCols + numOfTags) * sizeof(SSchema);
-
-      SKVRowBuilder kvRowBuilder = {0};
-      if (tdInitKVRowBuilder(&kvRowBuilder) < 0) {
-        terrno = TSDB_CODE_TDB_OUT_OF_MEMORY;
-        goto _err;
-      }
-      for (int i = numOfCols; i < numOfCols + numOfTags; i++) {
-        if (tdAddColToKVRow(&kvRowBuilder, htons(pSchema[i].colId), pSchema[i].type, pTagData + accBytes) < 0) {
-          terrno = TSDB_CODE_TDB_OUT_OF_MEMORY;
-          goto _err;
-        }
-        accBytes += htons(pSchema[i].bytes);
-      }
-
-      tsdbTableSetTagValue(pCfg, tdGetKVRowFromBuilder(&kvRowBuilder), false);
-      tdDestroyKVRowBuilder(&kvRowBuilder);
+      tsdbTableSetTagValue(pCfg, pTagData, true);
     }
   }
 
@@ -620,6 +604,10 @@ static char *getTagIndexKey(const void *pData) {
   STSchema *pSchema = tsdbGetTableTagSchema(pTable);
   STColumn *pCol = schemaColAt(pSchema, DEFAULT_TAG_INDEX_COLUMN);
   void *    res = tdGetKVRowValOfCol(pTable->tagVal, pCol->colId);
+  if (res == NULL) {
+    // treat the column as NULL if we cannot find it
+    res = getNullValue(pCol->type);
+  }
   return res;
 }
 
diff --git a/src/util/src/tcache.c b/src/util/src/tcache.c
index 2e57ad83aee0a59246bbe6ec25012daecbe916d4..720741f0893086d4c9c3fb59bee0adfe4dc3f534 100644
--- a/src/util/src/tcache.c
+++ b/src/util/src/tcache.c
@@ -119,7 +119,7 @@ static FORCE_INLINE void taosCacheReleaseNode(SCacheObj *pCacheObj, SCacheDataNo
   int32_t size = pNode->size;
   taosHashRemove(pCacheObj->pHashTable, pNode->key, pNode->keySize);
   
-  uDebug("key:%s is removed from cache,total:%" PRId64 ",size:%dbytes", pNode->key, pCacheObj->totalSize, size);  
+  uDebug("key:%s, is removed from cache, total:%" PRId64 " size:%d bytes", pNode->key, pCacheObj->totalSize, size);  
   if (pCacheObj->freeFp) pCacheObj->freeFp(pNode->data);
   free(pNode);
 }
@@ -288,14 +288,14 @@ void *taosCachePut(SCacheObj *pCacheObj, const char *key, const void *pData, siz
     if (NULL != pNode) {
       pCacheObj->totalSize += pNode->size;
       
-      uDebug("key:%s %p added into cache, added:%" PRIu64 ", expire:%" PRIu64 ", total:%" PRId64 ", size:%" PRId64 " bytes",
+      uDebug("key:%s, %p added into cache, added:%" PRIu64 ", expire:%" PRIu64 ", total:%" PRId64 ", size:%" PRId64 " bytes",
              key, pNode, pNode->addedTime, pNode->expiredTime, pCacheObj->totalSize, dataSize);
     } else {
-      uError("key:%s failed to added into cache, out of memory", key);
+      uError("key:%s, failed to added into cache, out of memory", key);
     }
   } else {  // old data exists, update the node
     pNode = taosUpdateCacheImpl(pCacheObj, pOld, key, keyLen, pData, dataSize, duration * 1000L);
-    uDebug("key:%s %p exist in cache, updated", key, pNode);
+    uDebug("key:%s, %p exist in cache, updated", key, pNode);
   }
   
   __cache_unlock(pCacheObj);
@@ -321,10 +321,10 @@ void *taosCacheAcquireByName(SCacheObj *pCacheObj, const char *key) {
   
   if (ptNode != NULL) {
     atomic_add_fetch_32(&pCacheObj->statistics.hitCount, 1);
-    uDebug("key:%s is retrieved from cache, %p refcnt:%d", key, (*ptNode), T_REF_VAL_GET(*ptNode));
+    uDebug("key:%s, is retrieved from cache, %p refcnt:%d", key, (*ptNode), T_REF_VAL_GET(*ptNode));
   } else {
     atomic_add_fetch_32(&pCacheObj->statistics.missCount, 1);
-    uDebug("key:%s not in cache, retrieved failed", key);
+    uDebug("key:%s, not in cache, retrieved failed", key);
   }
   
   atomic_add_fetch_32(&pCacheObj->statistics.totalAccess, 1);
@@ -350,10 +350,10 @@ void* taosCacheUpdateExpireTimeByName(SCacheObj *pCacheObj, const char *key, uin
   
   if (ptNode != NULL) {
     atomic_add_fetch_32(&pCacheObj->statistics.hitCount, 1);
-    uDebug("key:%s expireTime is updated in cache, %p refcnt:%d", key, (*ptNode), T_REF_VAL_GET(*ptNode));
+    uDebug("key:%s, expireTime is updated in cache, %p refcnt:%d", key, (*ptNode), T_REF_VAL_GET(*ptNode));
   } else {
     atomic_add_fetch_32(&pCacheObj->statistics.missCount, 1);
-    uDebug("key:%s not in cache, retrieved failed", key);
+    uDebug("key:%s, not in cache, retrieved failed", key);
   }
   
   atomic_add_fetch_32(&pCacheObj->statistics.totalAccess, 1);
@@ -410,13 +410,13 @@ void taosCacheRelease(SCacheObj *pCacheObj, void **data, bool _remove) {
   SCacheDataNode *pNode = (SCacheDataNode *)((char *)(*data) - offset);
   
   if (pNode->signature != (uint64_t)pNode) {
-    uError("key: %p release invalid cache data", pNode);
+    uError("%p release invalid cache data", pNode);
     return;
   }
   
   *data = NULL;
   int32_t ref = T_REF_DEC(pNode);
-  uDebug("%p data released, refcnt:%d", pNode, ref);
+  uDebug("key:%s, is released, %p refcnt:%d", pNode->key, pNode, ref);
   
   if (_remove) {
     __cache_wr_lock(pCacheObj);
@@ -501,7 +501,7 @@ void taosAddToTrash(SCacheObj *pCacheObj, SCacheDataNode *pNode) {
   pNode->inTrashCan = true;
   pCacheObj->numOfElemsInTrash++;
 
-  uDebug("key:%s %p move to trash, numOfElem in trash:%d", pNode->key, pNode, pCacheObj->numOfElemsInTrash);
+  uDebug("key:%s, %p move to trash, numOfElem in trash:%d", pNode->key, pNode, pCacheObj->numOfElemsInTrash);
 }
 
 void taosRemoveFromTrashCan(SCacheObj *pCacheObj, STrashElem *pElem) {
@@ -549,7 +549,7 @@ void taosTrashCanEmpty(SCacheObj *pCacheObj, bool force) {
     }
 
     if (force || (T_REF_VAL_GET(pElem->pData) == 0)) {
-      uDebug("key:%s %p removed from trash. numOfElem in trash:%d", pElem->pData->key, pElem->pData,
+      uDebug("key:%s, %p removed from trash. numOfElem in trash:%d", pElem->pData->key, pElem->pData,
              pCacheObj->numOfElemsInTrash - 1);
       STrashElem *p = pElem;
 
@@ -570,8 +570,11 @@ void doCleanupDataCache(SCacheObj *pCacheObj) {
   while (taosHashIterNext(pIter)) {
     SCacheDataNode *pNode = *(SCacheDataNode **)taosHashIterGet(pIter);
     // if (pNode->expiredTime <= expiredTime && T_REF_VAL_GET(pNode) <= 0) {
-    taosCacheReleaseNode(pCacheObj, pNode);
-    //}
+    if (T_REF_VAL_GET(pNode) <= 0) {
+      taosCacheReleaseNode(pCacheObj, pNode);
+    } else {
+      uDebug("key:%s, will not remove from cache, refcnt:%d", pNode->key, T_REF_VAL_GET(pNode));  
+    }
   }
   taosHashDestroyIter(pIter);