[td-255] merge develop

713d5d56 · Haojun Liao · 6f3023fb · 54b34680 · 713d5d56 · 713d5d56
66 changed file
--- a/.gitmodules
+++ b/.gitmodules
@@ -4,3 +4,6 @@
 [submodule "src/connector/grafanaplugin"]
 	path = src/connector/grafanaplugin
 	url = https://github.com/taosdata/grafanaplugin
+[submodule "src/connector/hivemq-tdengine-extension"]
+	path = src/connector/hivemq-tdengine-extension
+	url = https://github.com/huskar-t/hivemq-tdengine-extension.git
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -79,7 +79,21 @@ pipeline {
            cmake .. > /dev/null
            make > /dev/null
            cd ${WKC}/tests/pytest
-            ./crash_gen.sh -a -p -t 4 -s 2000
+            '''
+            catchError(buildResult: 'SUCCESS', stageResult: 'FAILURE') {
+                sh '''
+                cd ${WKC}/tests/pytest
+                ./crash_gen.sh -a -p -t 4 -s 2000
+                '''
+            }
+            catchError(buildResult: 'SUCCESS', stageResult: 'FAILURE') {
+                sh '''
+                cd ${WKC}/tests/pytest
+                ./crash_gen.sh --valgrind -p -t 10 -s 100 -b 4
+                ./handle_crash_gen_val_log.sh
+                '''
+            }
+            sh '''
            date
            cd ${WKC}/tests
            ./test-all.sh b2
@@ -124,14 +138,33 @@ pipeline {
            sh'''
            cd ${WORKSPACE}
            git checkout develop
-            cd tests/gotest
-            bash batchtest.sh
-            cd ${WORKSPACE}/tests/examples/JDBC/JDBCDemo/
-            mvn clean package assembly:single >/dev/null 
-            java -jar target/jdbcChecker-SNAPSHOT-jar-with-dependencies.jar -host 127.0.0.1
-            cd ${WORKSPACE}/tests/examples/python/PYTHONConnectorChecker
-            python3 PythonChecker.py
            '''
+            catchError(buildResult: 'SUCCESS', stageResult: 'FAILURE') {
+                sh '''
+                cd ${WORKSPACE}/tests/gotest
+                bash batchtest.sh
+                '''
+            }
+            catchError(buildResult: 'SUCCESS', stageResult: 'FAILURE') {
+                sh '''
+                cd ${WORKSPACE}/tests/examples/python/PYTHONConnectorChecker
+                python3 PythonChecker.py
+                '''
+            }
+            catchError(buildResult: 'SUCCESS', stageResult: 'FAILURE') {
+                sh '''
+                cd ${WORKSPACE}/tests/examples/JDBC/JDBCDemo/
+                mvn clean package assembly:single >/dev/null 
+                java -jar target/jdbcChecker-SNAPSHOT-jar-with-dependencies.jar -host 127.0.0.1
+                '''
+            }
+            catchError(buildResult: 'SUCCESS', stageResult: 'FAILURE') {
+                sh '''
+                cd ${JENKINS_HOME}/workspace/C#NET/src/CheckC#
+                dotnet run
+                '''
+            }
         }
       }
@@ -139,5 +172,82 @@ pipeline {
    }
  }
+  post {             
+        success {
+            emailext (
+                subject: "SUCCESSFUL: Job '${env.JOB_NAME} [${env.BUILD_NUMBER}]'",
+                body: '''<!DOCTYPE html>
+                <html>
+                <head>
+                <meta charset="UTF-8">
+                </head>
+                <body leftmargin="8" marginwidth="0" topmargin="8" marginheight="4" offset="0">
+                    <table width="95%" cellpadding="0" cellspacing="0" style="font-size: 16pt; font-family: Tahoma, Arial, Helvetica, sans-serif">
+                        <tr>
+                            <td><br />
+                                <b><font color="#0B610B"><font size="6">构建信息</font></font></b>
+                                <hr size="2" width="100%" align="center" /></td>
+                        </tr>
+                        <tr>
+                            <td>
+                                <ul>
+                                <div style="font-size:18px">
+                                    <li>构建名称>>分支：${PROJECT_NAME}</li>
+                                    <li>构建结果：<span style="color:green"> Successful </span></li>
+                                    <li>构建编号：${BUILD_NUMBER}</li>
+                                    <li>触发用户：${CAUSE}</li>
+                                    <li>变更概要：${CHANGES}</li>
+                                    <li>构建地址：<a href=${BUILD_URL}>${BUILD_URL}</a></li>
+                                    <li>构建日志：<a href=${BUILD_URL}console>${BUILD_URL}console</a></li>
+                                    <li>变更集：${JELLY_SCRIPT}</li>
+                                </div>
+                                </ul>
+                            </td>
+                        </tr>
+                    </table></font>
+                </body>
+                </html>''',
+                to: "yqliu@taosdata.com,pxiao@taosdata.com",
+                from: "support@taosdata.com"
+            )
+        }
+        failure {
+            emailext (
+                subject: "FAILED: Job '${env.JOB_NAME} [${env.BUILD_NUMBER}]'",
+                body: '''<!DOCTYPE html>
+                <html>
+                <head>
+                <meta charset="UTF-8">
+                </head>
+                <body leftmargin="8" marginwidth="0" topmargin="8" marginheight="4" offset="0">
+                    <table width="95%" cellpadding="0" cellspacing="0" style="font-size: 16pt; font-family: Tahoma, Arial, Helvetica, sans-serif">
+                        <tr>
+                            <td><br />
+                                <b><font color="#0B610B"><font size="6">构建信息</font></font></b>
+                                <hr size="2" width="100%" align="center" /></td>
+                        </tr>
+                        <tr>
+                            <td>
+                                <ul>
+                                <div style="font-size:18px">
+                                    <li>构建名称>>分支：${PROJECT_NAME}</li>
+                                    <li>构建结果：<span style="color:green"> Successful </span></li>
+                                    <li>构建编号：${BUILD_NUMBER}</li>
+                                    <li>触发用户：${CAUSE}</li>
+                                    <li>变更概要：${CHANGES}</li>
+                                    <li>构建地址：<a href=${BUILD_URL}>${BUILD_URL}</a></li>
+                                    <li>构建日志：<a href=${BUILD_URL}console>${BUILD_URL}console</a></li>
+                                    <li>变更集：${JELLY_SCRIPT}</li>
+                                </div>
+                                </ul>
+                            </td>
+                        </tr>
+                    </table></font>
+                </body>
+                </html>''',
+                to: "yqliu@taosdata.com,pxiao@taosdata.com",
+                from: "support@taosdata.com"
+            )
+        }
+    }
 }
\ No newline at end of file
--- a/packaging/deb/makedeb.sh
+++ b/packaging/deb/makedeb.sh
@@ -58,7 +58,7 @@ cp -r ${top_dir}/src/connector/grafanaplugin        ${pkg_dir}${install_home_pat
 cp -r ${top_dir}/src/connector/python               ${pkg_dir}${install_home_path}/connector
 cp -r ${top_dir}/src/connector/go                   ${pkg_dir}${install_home_path}/connector
 cp -r ${top_dir}/src/connector/nodejs               ${pkg_dir}${install_home_path}/connector
-cp ${compile_dir}/build/lib/taos-jdbcdriver*dist.*  ${pkg_dir}${install_home_path}/connector
+cp ${compile_dir}/build/lib/taos-jdbcdriver*dist.*  ${pkg_dir}${install_home_path}/connector ||:
 cp -r ${compile_dir}/../packaging/deb/DEBIAN        ${pkg_dir}/
 chmod 755 ${pkg_dir}/DEBIAN/*

--- a/packaging/release.sh
+++ b/packaging/release.sh
@@ -156,9 +156,15 @@ build_time=$(date +"%F %R")
 # get commint id from git
 gitinfo=$(git rev-parse --verify HEAD)
-enterprise_dir="${top_dir}/../enterprise"
-cd ${enterprise_dir}
+if [[ "$verMode" == "cluster" ]]; then
-gitinfoOfInternal=$(git rev-parse --verify HEAD)
+  enterprise_dir="${top_dir}/../enterprise"
+  cd ${enterprise_dir}
+  gitinfoOfInternal=$(git rev-parse --verify HEAD)
+else
+  gitinfoOfInternal=NULL
+fi
 cd ${curr_dir}
 # 2. cmake executable file
@@ -193,23 +199,35 @@ cd ${curr_dir}
 # 3. Call the corresponding script for packaging
 if [ "$osType" != "Darwin" ]; then
  if [[ "$verMode" != "cluster" ]] && [[ "$cpuType" == "x64" ]] && [[ "$dbName" == "taos" ]]; then
-    echo "====do deb package for the ubuntu system===="
+    ret='0'    
-    output_dir="${top_dir}/debs"
+    command -v dpkg >/dev/null 2>&1 || { ret='1'; }
-    if [ -d ${output_dir} ]; then
+    if [ "$ret" -eq 0 ]; then  
-      ${csudo} rm -rf ${output_dir}
+      echo "====do deb package for the ubuntu system===="
+      output_dir="${top_dir}/debs"
+      if [ -d ${output_dir} ]; then
+        ${csudo} rm -rf ${output_dir}
+      fi
+      ${csudo} mkdir -p ${output_dir}
+      cd ${script_dir}/deb
+      ${csudo} ./makedeb.sh ${compile_dir} ${output_dir} ${verNumber} ${cpuType} ${osType} ${verMode} ${verType}
+    else
+      echo "==========dpkg command not exist, so not release deb package!!!"
    fi
-    ${csudo} mkdir -p ${output_dir}
-    cd ${script_dir}/deb
+    ret='0'    
-    ${csudo} ./makedeb.sh ${compile_dir} ${output_dir} ${verNumber} ${cpuType} ${osType} ${verMode} ${verType}
+    command -v rpmbuild >/dev/null 2>&1 || { ret='1'; }
+    if [ "$ret" -eq 0 ]; then  
-    echo "====do rpm package for the centos system===="
+      echo "====do rpm package for the centos system===="
-    output_dir="${top_dir}/rpms"
+      output_dir="${top_dir}/rpms"
-    if [ -d ${output_dir} ]; then
+      if [ -d ${output_dir} ]; then
-      ${csudo} rm -rf ${output_dir}
+        ${csudo} rm -rf ${output_dir}
+      fi
+      ${csudo} mkdir -p ${output_dir}
+      cd ${script_dir}/rpm
+      ${csudo} ./makerpm.sh ${compile_dir} ${output_dir} ${verNumber} ${cpuType} ${osType} ${verMode} ${verType}
+    else
+      echo "==========rpmbuild command not exist, so not release rpm package!!!"
    fi
-    ${csudo} mkdir -p ${output_dir}
-    cd ${script_dir}/rpm
-    ${csudo} ./makerpm.sh ${compile_dir} ${output_dir} ${verNumber} ${cpuType} ${osType} ${verMode} ${verType}
  fi
  echo "====do tar.gz package for all systems===="

--- a/packaging/rpm/tdengine.spec
+++ b/packaging/rpm/tdengine.spec
@@ -65,7 +65,7 @@ cp -r %{_compiledir}/../src/connector/grafanaplugin %{buildroot}%{homepath}/conn
 cp -r %{_compiledir}/../src/connector/python        %{buildroot}%{homepath}/connector
 cp -r %{_compiledir}/../src/connector/go            %{buildroot}%{homepath}/connector
 cp -r %{_compiledir}/../src/connector/nodejs        %{buildroot}%{homepath}/connector
-cp %{_compiledir}/build/lib/taos-jdbcdriver*dist.*  %{buildroot}%{homepath}/connector
+cp %{_compiledir}/build/lib/taos-jdbcdriver*dist.*  %{buildroot}%{homepath}/connector ||:
 cp -r %{_compiledir}/../tests/examples/*            %{buildroot}%{homepath}/examples
 #Scripts executed before installation

--- a/packaging/tools/make_install.sh
+++ b/packaging/tools/make_install.sh
@@ -278,11 +278,11 @@ function install_service_on_sysvinit() {
    # Install taosd service
    if ((${os_type}==1)); then
-    ${csudo} cp -f ${script_dir}/../deb/init.d/taosd ${install_main_dir}/init.d
+    ${csudo} cp -f ${script_dir}/../deb/taosd ${install_main_dir}/init.d
-    ${csudo} cp    ${script_dir}/../deb/init.d/taosd ${service_config_dir} && ${csudo} chmod a+x ${service_config_dir}/taosd
+    ${csudo} cp    ${script_dir}/../deb/taosd ${service_config_dir} && ${csudo} chmod a+x ${service_config_dir}/taosd
    elif ((${os_type}==2)); then
-    ${csudo} cp -f ${script_dir}/../rpm/init.d/taosd ${install_main_dir}/init.d
+    ${csudo} cp -f ${script_dir}/../rpm/taosd ${install_main_dir}/init.d
-    ${csudo} cp    ${script_dir}/../rpm/init.d/taosd ${service_config_dir} && ${csudo} chmod a+x ${service_config_dir}/taosd
+    ${csudo} cp    ${script_dir}/../rpm/taosd ${service_config_dir} && ${csudo} chmod a+x ${service_config_dir}/taosd
    fi
    #restart_config_str="taos:2345:respawn:${service_config_dir}/taosd start"

--- a/packaging/tools/makeclient.sh
+++ b/packaging/tools/makeclient.sh
@@ -110,7 +110,7 @@ mkdir -p ${install_dir}/connector
 if [[ "$pagMode" != "lite" ]] && [[ "$cpuType" != "aarch32" ]]; then
  if [ "$osType" != "Darwin" ]; then
-    cp ${build_dir}/lib/*.jar      ${install_dir}/connector
+    cp ${build_dir}/lib/*.jar      ${install_dir}/connector ||:
  fi
  cp -r ${connector_dir}/grafanaplugin ${install_dir}/connector/
  cp -r ${connector_dir}/python        ${install_dir}/connector/

--- a/packaging/tools/makeclient_power.sh
+++ b/packaging/tools/makeclient_power.sh
@@ -135,7 +135,7 @@ mkdir -p ${install_dir}/connector
 if [[ "$pagMode" != "lite" ]] && [[ "$cpuType" != "aarch32" ]]; then
  if [ "$osType" != "Darwin" ]; then
-    cp ${build_dir}/lib/*.jar      ${install_dir}/connector
+    cp ${build_dir}/lib/*.jar      ${install_dir}/connector ||:
  fi
  cp -r ${connector_dir}/grafanaplugin ${install_dir}/connector/
  cp -r ${connector_dir}/python  ${install_dir}/connector/

--- a/packaging/tools/makepkg.sh
+++ b/packaging/tools/makepkg.sh
@@ -124,7 +124,7 @@ cp ${lib_files} ${install_dir}/driver
 connector_dir="${code_dir}/connector"
 mkdir -p ${install_dir}/connector
 if [[ "$pagMode" != "lite" ]] && [[ "$cpuType" != "aarch32" ]]; then
-  cp ${build_dir}/lib/*.jar            ${install_dir}/connector
+  cp ${build_dir}/lib/*.jar            ${install_dir}/connector ||:
  cp -r ${connector_dir}/grafanaplugin ${install_dir}/connector/
  cp -r ${connector_dir}/python        ${install_dir}/connector/
  cp -r ${connector_dir}/go            ${install_dir}/connector

--- a/packaging/tools/makepkg_power.sh
+++ b/packaging/tools/makepkg_power.sh
@@ -156,7 +156,7 @@ cp ${lib_files} ${install_dir}/driver
 connector_dir="${code_dir}/connector"
 mkdir -p ${install_dir}/connector
 if [[ "$pagMode" != "lite" ]] && [[ "$cpuType" != "aarch32" ]]; then
-  cp ${build_dir}/lib/*.jar      ${install_dir}/connector
+  cp ${build_dir}/lib/*.jar      ${install_dir}/connector ||:
  cp -r ${connector_dir}/grafanaplugin ${install_dir}/connector/
  cp -r ${connector_dir}/python  ${install_dir}/connector/
  cp -r ${connector_dir}/go      ${install_dir}/connector

--- a/snap/snapcraft.yaml
+++ b/snap/snapcraft.yaml
 name: tdengine
 base: core18
-version: '2.0.5.1'
+version: '2.0.6.0'
 icon: snap/gui/t-dengine.svg
 summary: an open-source big data platform designed and optimized for IoT. 
 description: |
@@ -72,7 +72,7 @@ parts:
      - usr/bin/taosd
      - usr/bin/taos
      - usr/bin/taosdemo
-      - usr/lib/libtaos.so.2.0.5.1
+      - usr/lib/libtaos.so.2.0.6.0
      - usr/lib/libtaos.so.1
      - usr/lib/libtaos.so

--- a/src/client/inc/tsclient.h
+++ b/src/client/inc/tsclient.h
@@ -30,6 +30,7 @@ extern "C" {
 #include "tsqlfunction.h"
 #include "tutil.h"
 #include "tcache.h"
+#include "tref.h"
 #include "qExecutor.h"
 #include "qSqlparser.h"
@@ -446,7 +447,7 @@ void tscFreeSqlObj(SSqlObj *pSql);
 void tscFreeRegisteredSqlObj(void *pSql);
 void tscFreeTableMetaHelper(void *pTableMeta);
-void tscCloseTscObj(STscObj *pObj);
+void tscCloseTscObj(void *pObj);
 // todo move to taos? or create a new file: taos_internal.h
 TAOS *taos_connect_a(char *ip, char *user, char *pass, char *db, uint16_t port, void (*fp)(void *, TAOS_RES *, int),
@@ -516,6 +517,7 @@ extern void *    tscQhandle;
 extern int       tscKeepConn[];
 extern int       tsInsertHeadSize;
 extern int       tscNumOfThreads;
+extern int       tscRefId;
 extern SRpcCorEpSet tscMgmtEpSet;

--- a/src/client/src/tscAsync.c
+++ b/src/client/src/tscAsync.c
@@ -428,8 +428,11 @@ void tscTableMetaCallBack(void *param, TAOS_RES *res, int code) {
      } else {
        assert(code == TSDB_CODE_SUCCESS);      
      }
+      // param already freed by other routine and pSql in tscCache when ctrl + c 
-      assert((tscGetNumOfTags(pTableMetaInfo->pTableMeta) != 0) && pSql->param != NULL);
+      if (atomic_load_ptr(&pSql->param) == NULL) {
+        return;
+      }
+      assert((tscGetNumOfTags(pTableMetaInfo->pTableMeta) != 0));
      SRetrieveSupport *trs = (SRetrieveSupport *)pSql->param;
      SSqlObj *         pParObj = trs->pParentSql;

--- a/src/client/src/tscFunctionImpl.c
+++ b/src/client/src/tscFunctionImpl.c
@@ -2461,12 +2461,22 @@ static void percentile_function(SQLFunctionCtx *pCtx) {
  // the first stage, only acquire the min/max value
  if (pInfo->stage == 0) {
    if (pCtx->preAggVals.isSet) {
-      if (GET_DOUBLE_VAL(&pInfo->minval) > pCtx->preAggVals.statis.min) {
+      double tmin = 0.0, tmax = 0.0;
-        SET_DOUBLE_VAL(&pInfo->minval, (double)pCtx->preAggVals.statis.min);
+      if (pCtx->inputType >= TSDB_DATA_TYPE_TINYINT && pCtx->inputType <= TSDB_DATA_TYPE_BIGINT) {
+        tmin = (double)GET_INT64_VAL(&pCtx->preAggVals.statis.min); 
+        tmax = (double)GET_INT64_VAL(&pCtx->preAggVals.statis.max); 
+      } else if (pCtx->inputType == TSDB_DATA_TYPE_DOUBLE || pCtx->inputType == TSDB_DATA_TYPE_FLOAT) {
+        tmin = GET_DOUBLE_VAL(&pCtx->preAggVals.statis.min); 
+        tmax = GET_DOUBLE_VAL(&pCtx->preAggVals.statis.max); 
+      } else {
+        assert(true);
+      }
+      if (GET_DOUBLE_VAL(&pInfo->minval) > tmin) {
+        SET_DOUBLE_VAL(&pInfo->minval, tmin);
      }
-      if (GET_DOUBLE_VAL(&pInfo->maxval) < pCtx->preAggVals.statis.max) {
+      if (GET_DOUBLE_VAL(&pInfo->maxval) < tmax) {
-        SET_DOUBLE_VAL(&pInfo->maxval, (double)pCtx->preAggVals.statis.max);
+        SET_DOUBLE_VAL(&pInfo->maxval, tmax);
      }
      pInfo->numOfElems += (pCtx->size - pCtx->preAggVals.statis.numOfNull);

--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -877,22 +877,13 @@ static bool validateTableColumnInfo(tFieldList* pFieldList, SSqlCmd* pCmd) {
  int32_t nLen = 0;
  for (int32_t i = 0; i < pFieldList->nField; ++i) {
-    if (pFieldList->p[i].bytes == 0) {
+    TAOS_FIELD* pField = &pFieldList->p[i];
+    if (pField->bytes == 0) {
      invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg5);
      return false;
    }
-    nLen += pFieldList->p[i].bytes;
-  }
-  // max row length must be less than TSDB_MAX_BYTES_PER_ROW
-  if (nLen > TSDB_MAX_BYTES_PER_ROW) {
-    invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg2);
-    return false;
-  }
-  // field name must be unique
-  for (int32_t i = 0; i < pFieldList->nField; ++i) {
-    TAOS_FIELD* pField = &pFieldList->p[i];
    if (pField->type < TSDB_DATA_TYPE_BOOL || pField->type > TSDB_DATA_TYPE_NCHAR) {
      invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg4);
      return false;
@@ -909,10 +900,19 @@ static bool validateTableColumnInfo(tFieldList* pFieldList, SSqlCmd* pCmd) {
      return false;
    }
+    // field name must be unique
    if (has(pFieldList, i + 1, pFieldList->p[i].name) == true) {
      invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg3);
      return false;
    }
+    nLen += pField->bytes;
+  }
+  // max row length must be less than TSDB_MAX_BYTES_PER_ROW
+  if (nLen > TSDB_MAX_BYTES_PER_ROW) {
+    invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), msg2);
+    return false;
  }
  return true;

--- a/src/client/src/tscServer.c
+++ b/src/client/src/tscServer.c
@@ -190,18 +190,19 @@ void tscProcessHeartBeatRsp(void *param, TAOS_RES *tres, int code) {
 void tscProcessActivityTimer(void *handle, void *tmrId) {
  STscObj *pObj = (STscObj *)handle;
-  if (pObj == NULL || pObj->signature != pObj) {
+  int ret = taosAcquireRef(tscRefId, pObj);
+  if (ret < 0) {
+    tscTrace("%p failed to acquire TSC obj, reason:%s", pObj, tstrerror(ret));
    return;
  }
  SSqlObj* pHB = pObj->pHb;
-  if (pObj->pTimer != tmrId || pHB == NULL) {
-    return;
-  }
  void** p = taosCacheAcquireByKey(tscObjCache, &pHB, sizeof(TSDB_CACHE_PTR_TYPE));
  if (p == NULL) {
    tscWarn("%p HB object has been released already", pHB);
+    taosReleaseRef(tscRefId, pObj);
    return;
  }
@@ -214,6 +215,8 @@ void tscProcessActivityTimer(void *handle, void *tmrId) {
  if (code != TSDB_CODE_SUCCESS) {
    tscError("%p failed to sent HB to server, reason:%s", pHB, tstrerror(code));
  }
+  taosReleaseRef(tscRefId, pObj);
 }
 int tscSendMsgToServer(SSqlObj *pSql) {

--- a/src/client/src/tscSql.c
+++ b/src/client/src/tscSql.c
@@ -161,6 +161,7 @@ static SSqlObj *taosConnectImpl(const char *ip, const char *user, const char *pa
  registerSqlObj(pSql);
  tsInsertHeadSize = sizeof(SMsgDesc) + sizeof(SSubmitMsg);
+  taosAddRef(tscRefId, pObj);
  return pSql;
 }
@@ -296,7 +297,8 @@ void taos_close(TAOS *taos) {
  }
  tscDebug("%p all sqlObj are freed, free tscObj and close dnodeConn:%p", pObj, pObj->pDnodeConn);
-  tscCloseTscObj(pObj);
+  taosRemoveRef(tscRefId, pObj);
 }
 void waitForQueryRsp(void *param, TAOS_RES *tres, int code) {

--- a/src/client/src/tscSystem.c
+++ b/src/client/src/tscSystem.c
@@ -36,6 +36,7 @@ void *  tscTmr;
 void *  tscQhandle;
 void *  tscCheckDiskUsageTmr;
 int     tsInsertHeadSize;
+int     tscRefId;
 int tscNumOfThreads;
@@ -146,6 +147,8 @@ void taos_init_imp(void) {
    tscObjCache = taosCacheInit(TSDB_CACHE_PTR_KEY, refreshTime / 2, false, tscFreeRegisteredSqlObj, "sqlObj");
  }
+  tscRefId = taosOpenRef(200, tscCloseTscObj);
  // in other language APIs, taos_cleanup is not available yet.
  // So, to make sure taos_cleanup will be invoked to clean up the allocated
  // resource to suppress the valgrind warning.
@@ -174,6 +177,7 @@ void taos_cleanup() {
    taosCleanUpScheduler(m);
  }
+  taosCloseRef(tscRefId);
  taosCleanupKeywordsTable();
  taosCloseLog();

--- a/src/client/src/tscUtil.c
+++ b/src/client/src/tscUtil.c
@@ -404,7 +404,7 @@ void tscFreeRegisteredSqlObj(void *pSql) {
  tscDebug("%p free sqlObj completed, tscObj:%p ref:%d", *p, pTscObj, ref);
  if (ref == 0) {
    tscDebug("%p all sqlObj freed, free tscObj:%p", *p, pTscObj);
-    tscCloseTscObj(pTscObj);
+    taosRemoveRef(tscRefId, pTscObj);
  }
 }
@@ -786,8 +786,8 @@ int32_t tscMergeTableDataBlocks(SSqlObj* pSql, SArray* pTableDataBlockList) {
 }
 // TODO: all subqueries should be freed correctly before close this connection.
-void tscCloseTscObj(STscObj* pObj) {
+void tscCloseTscObj(void *param) {
-  assert(pObj != NULL);
+  STscObj *pObj = param;
  pObj->signature = NULL;
  taosTmrStopA(&(pObj->pTimer));

--- a/hivemq-tdengine-extension @ b62a26ec
+++ b/hivemq-tdengine-extension @ b62a26ec
+Subproject commit b62a26ecc164a310104df57691691b237e091c89
--- a/src/inc/taoserror.h
+++ b/src/inc/taoserror.h
@@ -28,7 +28,7 @@ extern "C" {
 #else
 #define TAOS_DEFINE_ERROR(name, mod, code, msg) static const int32_t name = (0x80000000 | ((mod)<<16) | (code));
 #endif
 #define TAOS_SYSTEM_ERROR(code)             (0x80ff0000 | (code))
 #define TAOS_SUCCEEDED(err)                 ((err) >= 0)
 #define TAOS_FAILED(err)                    ((err) < 0)
@@ -37,7 +37,7 @@ const char* tstrerror(int32_t err);
 int32_t* taosGetErrno();
 #define terrno                              (*taosGetErrno())
 #define TSDB_CODE_SUCCESS                   0
 #ifdef TAOS_ERROR_C
@@ -74,6 +74,12 @@ TAOS_DEFINE_ERROR(TSDB_CODE_COM_MEMORY_CORRUPTED,         0, 0x0101, "Memory cor
 TAOS_DEFINE_ERROR(TSDB_CODE_COM_OUT_OF_MEMORY,            0, 0x0102, "Out of memory")
 TAOS_DEFINE_ERROR(TSDB_CODE_COM_INVALID_CFG_MSG,          0, 0x0103, "Invalid config message")
 TAOS_DEFINE_ERROR(TSDB_CODE_COM_FILE_CORRUPTED,           0, 0x0104, "Data file corrupted")
+TAOS_DEFINE_ERROR(TSDB_CODE_REF_NO_MEMORY,                0, 0x0105, "Ref out of memory")
+TAOS_DEFINE_ERROR(TSDB_CODE_REF_FULL,                     0, 0x0106, "too many Ref Objs")
+TAOS_DEFINE_ERROR(TSDB_CODE_REF_ID_REMOVED,               0, 0x0107, "Ref ID is removed")
+TAOS_DEFINE_ERROR(TSDB_CODE_REF_INVALID_ID,               0, 0x0108, "Invalid Ref ID")
+TAOS_DEFINE_ERROR(TSDB_CODE_REF_ALREADY_EXIST,            0, 0x0109, "Ref is already there")
+TAOS_DEFINE_ERROR(TSDB_CODE_REF_NOT_EXIST,                0, 0x010A, "Ref is not there")
 //client
 TAOS_DEFINE_ERROR(TSDB_CODE_TSC_INVALID_SQL,              0, 0x0200, "Invalid SQL statement")
@@ -182,7 +188,7 @@ TAOS_DEFINE_ERROR(TSDB_CODE_DND_OUT_OF_MEMORY,            0, 0x0401, "Dnode out
 TAOS_DEFINE_ERROR(TSDB_CODE_DND_NO_WRITE_ACCESS,          0, 0x0402, "No permission for disk files in dnode")
 TAOS_DEFINE_ERROR(TSDB_CODE_DND_INVALID_MSG_LEN,          0, 0x0403, "Invalid message length")
-// vnode
+// vnode 
 TAOS_DEFINE_ERROR(TSDB_CODE_VND_ACTION_IN_PROGRESS,       0, 0x0500, "Action in progress")
 TAOS_DEFINE_ERROR(TSDB_CODE_VND_MSG_NOT_PROCESSED,        0, 0x0501, "Message not processed")
 TAOS_DEFINE_ERROR(TSDB_CODE_VND_ACTION_NEED_REPROCESSED,  0, 0x0502, "Action need to be reprocessed")

--- a/src/inc/taosmsg.h
+++ b/src/inc/taosmsg.h
@@ -106,6 +106,10 @@ TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_DUMMY12, "dummy12" )
 TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_DUMMY13, "dummy13" )
 TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_DUMMY14, "dummy14" )
+TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_NETWORK_TEST, "network-test" )
 #ifndef TAOS_MESSAGE_C
  TSDB_MSG_TYPE_MAX  // 105
 #endif

--- a/src/inc/twal.h
+++ b/src/inc/twal.h
@@ -22,22 +22,22 @@ extern "C" {
 #define TAOS_WAL_NOLOG   0
 #define TAOS_WAL_WRITE   1
 #define TAOS_WAL_FSYNC   2
 typedef struct {
-  int8_t    msgType;
+  int8_t   msgType;
-  int8_t    reserved[3];
+  int8_t   reserved[3];
-  int32_t   len;
+  int32_t  len;
-  uint64_t  version;
+  uint64_t version;
-  uint32_t  signature;
+  uint32_t signature;
-  uint32_t  cksum;
+  uint32_t cksum;
-  char      cont[];
+  char     cont[];
 } SWalHead;
 typedef struct {
-  int8_t    walLevel;  // wal level
+  int8_t  walLevel;     // wal level
-  int32_t   fsyncPeriod; // millisecond
+  int32_t fsyncPeriod;  // millisecond
-  int8_t    wals;      // number of WAL files;
+  int8_t  wals;         // number of WAL files;
-  int8_t    keep;      // keep the wal file when closed
+  int8_t  keep;         // keep the wal file when closed
 } SWalCfg;
 typedef void* twalh;  // WAL HANDLE
@@ -53,9 +53,6 @@ int     walRestore(twalh, void *pVnode, FWalWrite writeFp);
 int     walGetWalFile(twalh, char *name, uint32_t *index);
 int64_t walGetVersion(twalh);
-extern int wDebugFlag;
 #ifdef __cplusplus
 }
 #endif

--- a/src/kit/shell/src/shellMain.c
+++ b/src/kit/shell/src/shellMain.c
@@ -80,7 +80,10 @@ int main(int argc, char* argv[]) {
  shellParseArgument(argc, argv, &args);
  if (args.netTestRole && args.netTestRole[0] != 0) {
-    taosNetTest(args.host, (uint16_t)args.port, (uint16_t)args.endPort, args.pktLen, args.netTestRole);
+    taos_init();
+    CmdArguments cmdArgs;
+    memcpy(&cmdArgs, &args, sizeof(SShellArguments));
+    taosNetTest(&cmdArgs);
    exit(0);
  }

--- a/src/mnode/src/mnodeSdb.c
+++ b/src/mnode/src/mnodeSdb.c
@@ -281,7 +281,14 @@ static void sdbConfirmForward(void *ahandle, void *param, int32_t code) {
             ((SSdbTable *)pOper->table)->tableName, pOper->pObj, sdbGetKeyStr(pOper->table, pHead->cont),
             pHead->version, action, tstrerror(pOper->retCode));
    if (action == SDB_ACTION_INSERT) {
-      sdbDeleteHash(pOper->table, pOper);
+      // It's better to create a table in two stages, create it first and then set it success
+      //sdbDeleteHash(pOper->table, pOper);
+      SSdbOper oper = {
+        .type  = SDB_OPER_GLOBAL,
+        .table = pOper->table,
+        .pObj  = pOper->pObj
+      };
+      sdbDeleteRow(&oper);
    }
  }

--- a/src/mnode/src/mnodeVgroup.c
+++ b/src/mnode/src/mnodeVgroup.c
@@ -663,13 +663,13 @@ static int32_t mnodeGetVgroupMeta(STableMetaMsg *pMeta, SShowObj *pShow, void *p
  for (int32_t i = 0; i < pShow->maxReplica; ++i) {
    pShow->bytes[cols] = 2;
    pSchema[cols].type = TSDB_DATA_TYPE_SMALLINT;
-    snprintf(pSchema[cols].name, TSDB_COL_NAME_LEN, "dnode%d", i + 1);
+    snprintf(pSchema[cols].name, TSDB_COL_NAME_LEN, "v%dDnode", i + 1);
    pSchema[cols].bytes = htons(pShow->bytes[cols]);
    cols++;
    pShow->bytes[cols] = 9 + VARSTR_HEADER_SIZE;
    pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
-    snprintf(pSchema[cols].name, TSDB_COL_NAME_LEN, "v%dstatus", i + 1);
+    snprintf(pSchema[cols].name, TSDB_COL_NAME_LEN, "v%dStatus", i + 1);
    pSchema[cols].bytes = htons(pShow->bytes[cols]);
    cols++;
  }

--- a/src/query/inc/qExecutor.h
+++ b/src/query/inc/qExecutor.h
@@ -33,15 +33,11 @@ struct SColumnFilterElem;
 typedef bool (*__filter_func_t)(struct SColumnFilterElem* pFilter, char* val1, char* val2);
 typedef int32_t (*__block_search_fn_t)(char* data, int32_t num, int64_t key, int32_t order);
-typedef struct SPosInfo {
-  int32_t pageId:20;
-  int32_t rowId:12;
-} SPosInfo;
 typedef struct SGroupResInfo {
  int32_t  groupId;
  int32_t  numOfDataPages;
-  SPosInfo pos;
+  int32_t  pageId;
+  int32_t  rowId;
 } SGroupResInfo;
 typedef struct SSqlGroupbyExpr {
@@ -53,9 +49,10 @@ typedef struct SSqlGroupbyExpr {
 } SSqlGroupbyExpr;
 typedef struct SWindowResult {
-  SPosInfo      pos;         // Position of current result in disk-based output buffer
+  int32_t       pageId;      // pageId & rowId is the position of current result in disk-based output buffer
+  int32_t       rowId:15;
+  bool          closed:1;    // this result status: closed or opened
  uint16_t      numOfRows;   // number of rows of current time window
-  bool          closed;      // this result status: closed or opened
  SResultInfo*  resultInfo;  // For each result column, there is a resultInfo
  union {STimeWindow win; char* key;};  // start key of current time window
 } SWindowResult;

--- a/src/query/inc/qUtil.h
+++ b/src/query/inc/qUtil.h
@@ -51,7 +51,7 @@ static FORCE_INLINE char *getPosInResultPage(SQueryRuntimeEnv *pRuntimeEnv, int3
  SQuery *pQuery = pRuntimeEnv->pQuery;
-  int32_t realRowId = (int32_t)(pResult->pos.rowId * GET_ROW_PARAM_FOR_MULTIOUTPUT(pQuery, pRuntimeEnv->topBotQuery, pRuntimeEnv->stableQuery));
+  int32_t realRowId = (int32_t)(pResult->rowId * GET_ROW_PARAM_FOR_MULTIOUTPUT(pQuery, pRuntimeEnv->topBotQuery, pRuntimeEnv->stableQuery));
  return ((char *)page->data) + pRuntimeEnv->offset[columnIndex] * pRuntimeEnv->numOfRowsPerPage +
      pQuery->pSelectExpr[columnIndex].bytes * realRowId;
 }

--- a/src/query/src/qExecutor.c
+++ b/src/query/src/qExecutor.c
@@ -557,7 +557,7 @@ static STimeWindow getActiveTimeWindow(SWindowResInfo *pWindowResInfo, int64_t t
 static int32_t addNewWindowResultBuf(SWindowResult *pWindowRes, SDiskbasedResultBuf *pResultBuf, int32_t sid,
                                     int32_t numOfRowsPerPage) {
-  if (pWindowRes->pos.pageId != -1) {
+  if (pWindowRes->pageId != -1) {
    return 0;
  }
@@ -590,11 +590,11 @@ static int32_t addNewWindowResultBuf(SWindowResult *pWindowRes, SDiskbasedResult
  }
  // set the number of rows in current disk page
-  if (pWindowRes->pos.pageId == -1) {  // not allocated yet, allocate new buffer
+  if (pWindowRes->pageId == -1) {  // not allocated yet, allocate new buffer
-    pWindowRes->pos.pageId = pageId;
+    pWindowRes->pageId = pageId;
-    pWindowRes->pos.rowId = (int32_t)(pData->num++);
+    pWindowRes->rowId = (int32_t)(pData->num++);
-    assert(pWindowRes->pos.pageId >= 0);
+    assert(pWindowRes->pageId >= 0);
  }
  return 0;
@@ -616,7 +616,7 @@ static int32_t setWindowOutputBufByKey(SQueryRuntimeEnv *pRuntimeEnv, SWindowRes
  *newWind = true;
  // not assign result buffer yet, add new result buffer
-  if (pWindowRes->pos.pageId == -1) {
+  if (pWindowRes->pageId == -1) {
    int32_t ret = addNewWindowResultBuf(pWindowRes, pResultBuf, sid, pRuntimeEnv->numOfRowsPerPage);
    if (ret != TSDB_CODE_SUCCESS) {
      return -1;
@@ -1141,7 +1141,7 @@ static int32_t setGroupResultOutputBuf(SQueryRuntimeEnv *pRuntimeEnv, char *pDat
  assert(pRuntimeEnv->windowResInfo.interval == 0);
-  if (pWindowRes->pos.pageId == -1) {
+  if (pWindowRes->pageId == -1) {
    int32_t ret = addNewWindowResultBuf(pWindowRes, pResultBuf, GROUPRESULTID, pRuntimeEnv->numOfRowsPerPage);
    if (ret != 0) {
      return -1;
@@ -2652,7 +2652,7 @@ static void doMerge(SQueryRuntimeEnv *pRuntimeEnv, int64_t timestamp, SWindowRes
  SQuery *        pQuery = pRuntimeEnv->pQuery;
  SQLFunctionCtx *pCtx = pRuntimeEnv->pCtx;
-  tFilePage *page = getResBufPage(pRuntimeEnv->pResultBuf, pWindowRes->pos.pageId);
+  tFilePage *page = getResBufPage(pRuntimeEnv->pResultBuf, pWindowRes->pageId);
  for (int32_t i = 0; i < pQuery->numOfOutput; ++i) {
    int32_t functionId = pQuery->pSelectExpr[i].base.functionId;
@@ -2823,14 +2823,14 @@ int32_t tableResultComparFn(const void *pLeft, const void *pRight, void *param)
  SWindowResInfo *pWindowResInfo1 = &supporter->pTableQueryInfo[left]->windowResInfo;
  SWindowResult * pWindowRes1 = getWindowResult(pWindowResInfo1, leftPos);
-  tFilePage *page1 = getResBufPage(pRuntimeEnv->pResultBuf, pWindowRes1->pos.pageId);
+  tFilePage *page1 = getResBufPage(pRuntimeEnv->pResultBuf, pWindowRes1->pageId);
  char *b1 = getPosInResultPage(pRuntimeEnv, PRIMARYKEY_TIMESTAMP_COL_INDEX, pWindowRes1, page1);
  TSKEY leftTimestamp = GET_INT64_VAL(b1);
  SWindowResInfo *pWindowResInfo2 = &supporter->pTableQueryInfo[right]->windowResInfo;
  SWindowResult * pWindowRes2 = getWindowResult(pWindowResInfo2, rightPos);
-  tFilePage *page2 = getResBufPage(pRuntimeEnv->pResultBuf, pWindowRes2->pos.pageId);
+  tFilePage *page2 = getResBufPage(pRuntimeEnv->pResultBuf, pWindowRes2->pageId);
  char *b2 = getPosInResultPage(pRuntimeEnv, PRIMARYKEY_TIMESTAMP_COL_INDEX, pWindowRes2, page2);
  TSKEY rightTimestamp = GET_INT64_VAL(b2);
@@ -2867,7 +2867,7 @@ int32_t mergeIntoGroupResult(SQInfo *pQInfo) {
  }
  SGroupResInfo* info = &pQInfo->groupResInfo;
-  if (pQInfo->groupIndex == numOfGroups && info->pos.pageId == info->numOfDataPages) {
+  if (pQInfo->groupIndex == numOfGroups && info->pageId == info->numOfDataPages) {
    SET_STABLE_QUERY_OVER(pQInfo);
  }
@@ -2883,10 +2883,10 @@ void copyResToQueryResultBuf(SQInfo *pQInfo, SQuery *pQuery) {
  SGroupResInfo* pGroupResInfo = &pQInfo->groupResInfo;
  // all results have been return to client, try next group
-  if (pGroupResInfo->pos.pageId == pGroupResInfo->numOfDataPages) {
+  if (pGroupResInfo->pageId == pGroupResInfo->numOfDataPages) {
    pGroupResInfo->numOfDataPages = 0;
-    pGroupResInfo->pos.pageId = 0;
+    pGroupResInfo->pageId = 0;
-    pGroupResInfo->pos.rowId = 0;
+    pGroupResInfo->rowId = 0;
    // current results of group has been sent to client, try next group
    if (mergeIntoGroupResult(pQInfo) != TSDB_CODE_SUCCESS) {
@@ -2914,22 +2914,22 @@ void copyResToQueryResultBuf(SQInfo *pQInfo, SQuery *pQuery) {
  assert(size == pGroupResInfo->numOfDataPages);
  bool done = false;
-  for (int32_t j = pGroupResInfo->pos.pageId; j < size; ++j) {
+  for (int32_t j = pGroupResInfo->pageId; j < size; ++j) {
    SPageInfo* pi = *(SPageInfo**) taosArrayGet(list, j);
    tFilePage* pData = getResBufPage(pResultBuf, pi->pageId);
-    assert(pData->num > 0 && pData->num <= pRuntimeEnv->numOfRowsPerPage && pGroupResInfo->pos.rowId < pData->num);
+    assert(pData->num > 0 && pData->num <= pRuntimeEnv->numOfRowsPerPage && pGroupResInfo->rowId < pData->num);
-    int32_t numOfRes = (int32_t)(pData->num - pGroupResInfo->pos.rowId);
+    int32_t numOfRes = (int32_t)(pData->num - pGroupResInfo->rowId);
    if (numOfRes > pQuery->rec.capacity - offset) {
      numOfCopiedRows = (int32_t)(pQuery->rec.capacity - offset);
-      pGroupResInfo->pos.rowId += numOfCopiedRows;
+      pGroupResInfo->rowId += numOfCopiedRows;
      done = true;
    } else {
      numOfCopiedRows = (int32_t)pData->num;
-      pGroupResInfo->pos.pageId += 1;
+      pGroupResInfo->pageId += 1;
-      pGroupResInfo->pos.rowId = 0;
+      pGroupResInfo->rowId = 0;
    }
    for (int32_t i = 0; i < pQuery->numOfOutput; ++i) {
@@ -3020,8 +3020,8 @@ int32_t mergeIntoGroupResultImpl(SQInfo *pQInfo, SArray *pGroup) {
    pGroupResInfo->numOfDataPages = (int32_t)taosArrayGetSize(pageList);
    pGroupResInfo->groupId = tid;
-    pGroupResInfo->pos.pageId = 0;
+    pGroupResInfo->pageId = 0;
-    pGroupResInfo->pos.rowId = 0;
+    pGroupResInfo->rowId = 0;
    return pGroupResInfo->numOfDataPages;
  }
@@ -3067,7 +3067,7 @@ int32_t mergeIntoGroupResultImpl(SQInfo *pQInfo, SArray *pGroup) {
    SWindowResInfo *pWindowResInfo = &pTableList[pos]->windowResInfo;
    SWindowResult  *pWindowRes = getWindowResult(pWindowResInfo, cs.position[pos]);
-    tFilePage *page = getResBufPage(pRuntimeEnv->pResultBuf, pWindowRes->pos.pageId);
+    tFilePage *page = getResBufPage(pRuntimeEnv->pResultBuf, pWindowRes->pageId);
    char *b = getPosInResultPage(pRuntimeEnv, PRIMARYKEY_TIMESTAMP_COL_INDEX, pWindowRes, page);
    TSKEY ts = GET_INT64_VAL(b);
@@ -3104,7 +3104,7 @@ int32_t mergeIntoGroupResultImpl(SQInfo *pQInfo, SArray *pGroup) {
      lastTimestamp = ts;
      // move to the next element of current entry
-      int32_t currentPageId = pWindowRes->pos.pageId;
+      int32_t currentPageId = pWindowRes->pageId;
      cs.position[pos] += 1;
      if (cs.position[pos] >= pWindowResInfo->size) {
@@ -3117,7 +3117,7 @@ int32_t mergeIntoGroupResultImpl(SQInfo *pQInfo, SArray *pGroup) {
      } else {
        // current page is not needed anymore
        SWindowResult  *pNextWindowRes = getWindowResult(pWindowResInfo, cs.position[pos]);
-        if (pNextWindowRes->pos.pageId != currentPageId) {
+        if (pNextWindowRes->pageId != currentPageId) {
          releaseResBufPage(pRuntimeEnv->pResultBuf, page);
        }
      }
@@ -3329,7 +3329,8 @@ int32_t createQueryResultInfo(SQuery *pQuery, SWindowResult *pResultRow, bool is
    return TSDB_CODE_QRY_OUT_OF_MEMORY;
  }
-  pResultRow->pos = (SPosInfo) {-1, -1};
+  pResultRow->pageId = -1;
+  pResultRow->rowId = -1;
  char* buf = (char*) pResultRow->resultInfo + numOfCols * sizeof(SResultInfo);
@@ -3795,7 +3796,7 @@ void setExecutionContext(SQInfo *pQInfo, int32_t groupIndex, TSKEY nextKey) {
   * not assign result buffer yet, add new result buffer
   * all group belong to one result set, and each group result has different group id so set the id to be one
   */
-  if (pWindowRes->pos.pageId == -1) {
+  if (pWindowRes->pageId == -1) {
    if (addNewWindowResultBuf(pWindowRes, pRuntimeEnv->pResultBuf, groupIndex, pRuntimeEnv->numOfRowsPerPage) !=
        TSDB_CODE_SUCCESS) {
      return;
@@ -3812,7 +3813,7 @@ void setWindowResOutputBuf(SQueryRuntimeEnv *pRuntimeEnv, SWindowResult *pResult
  SQuery *pQuery = pRuntimeEnv->pQuery;
  // Note: pResult->pos[i]->num == 0, there is only fixed number of results for each group
-  tFilePage *page = getResBufPage(pRuntimeEnv->pResultBuf, pResult->pos.pageId);
+  tFilePage *page = getResBufPage(pRuntimeEnv->pResultBuf, pResult->pageId);
  for (int32_t i = 0; i < pQuery->numOfOutput; ++i) {
    SQLFunctionCtx *pCtx = &pRuntimeEnv->pCtx[i];
@@ -3839,7 +3840,7 @@ void setWindowResOutputBufInitCtx(SQueryRuntimeEnv *pRuntimeEnv, SWindowResult *
  SQuery *pQuery = pRuntimeEnv->pQuery;
  // Note: pResult->pos[i]->num == 0, there is only fixed number of results for each group
-  tFilePage* bufPage = getResBufPage(pRuntimeEnv->pResultBuf, pResult->pos.pageId);
+  tFilePage* bufPage = getResBufPage(pRuntimeEnv->pResultBuf, pResult->pageId);
  for (int32_t i = 0; i < pQuery->numOfOutput; ++i) {
    SQLFunctionCtx *pCtx = &pRuntimeEnv->pCtx[i];
@@ -4018,12 +4019,12 @@ static int32_t doCopyToSData(SQInfo *pQInfo, SWindowResInfo *pResultInfo, int32_
  for (int32_t i = startIdx; (i < totalSet) && (i >= 0); i += step) {
    if (result[i].numOfRows == 0) {
      pQInfo->groupIndex += 1;
-      pGroupResInfo->pos.rowId = 0;
+      pGroupResInfo->rowId = 0;
      continue;
    }
-    int32_t numOfRowsToCopy = result[i].numOfRows - pGroupResInfo->pos.rowId;
+    int32_t numOfRowsToCopy = result[i].numOfRows - pGroupResInfo->rowId;
-    int32_t oldOffset = pGroupResInfo->pos.rowId;
+    int32_t oldOffset = pGroupResInfo->rowId;
    /*
     * current output space is not enough to accommodate all data of this page, only partial results
@@ -4031,13 +4032,13 @@ static int32_t doCopyToSData(SQInfo *pQInfo, SWindowResInfo *pResultInfo, int32_
     */
    if (numOfRowsToCopy > pQuery->rec.capacity - numOfResult) {
      numOfRowsToCopy = (int32_t) pQuery->rec.capacity - numOfResult;
-      pGroupResInfo->pos.rowId += numOfRowsToCopy;
+      pGroupResInfo->rowId += numOfRowsToCopy;
    } else {
-      pGroupResInfo->pos.rowId = 0;
+      pGroupResInfo->rowId = 0;
      pQInfo->groupIndex += 1;
    }
-    tFilePage *page = getResBufPage(pRuntimeEnv->pResultBuf, result[i].pos.pageId);
+    tFilePage *page = getResBufPage(pRuntimeEnv->pResultBuf, result[i].pageId);
    for (int32_t j = 0; j < pQuery->numOfOutput; ++j) {
      int32_t size = pRuntimeEnv->pCtx[j].outputBytes;

--- a/src/query/src/qUtil.c
+++ b/src/query/src/qUtil.c
@@ -266,7 +266,7 @@ void clearTimeWindowResBuf(SQueryRuntimeEnv *pRuntimeEnv, SWindowResult *pWindow
    return;
  }
-  tFilePage *page = getResBufPage(pRuntimeEnv->pResultBuf, pWindowRes->pos.pageId);
+  tFilePage *page = getResBufPage(pRuntimeEnv->pResultBuf, pWindowRes->pageId);
  for (int32_t i = 0; i < pRuntimeEnv->pQuery->numOfOutput; ++i) {
    SResultInfo *pResultInfo = &pWindowRes->resultInfo[i];
@@ -279,7 +279,8 @@ void clearTimeWindowResBuf(SQueryRuntimeEnv *pRuntimeEnv, SWindowResult *pWindow
  }
  pWindowRes->numOfRows = 0;
-  pWindowRes->pos = (SPosInfo){-1, -1};
+  pWindowRes->pageId = -1;
+  pWindowRes->rowId = -1;
  pWindowRes->closed = false;
  pWindowRes->win = TSWINDOW_INITIALIZER;
 }
@@ -308,10 +309,10 @@ void copyTimeWindowResBuf(SQueryRuntimeEnv *pRuntimeEnv, SWindowResult *dst, con
    memcpy(pDst->interResultBuf, pSrc->interResultBuf, pDst->bufLen);
    // copy the output buffer data from src to dst, the position info keep unchanged
-    tFilePage *dstpage = getResBufPage(pRuntimeEnv->pResultBuf, dst->pos.pageId);
+    tFilePage *dstpage = getResBufPage(pRuntimeEnv->pResultBuf, dst->pageId);
    char * dstBuf = getPosInResultPage(pRuntimeEnv, i, dst, dstpage);
-    tFilePage *srcpage = getResBufPage(pRuntimeEnv->pResultBuf, src->pos.pageId);
+    tFilePage *srcpage = getResBufPage(pRuntimeEnv->pResultBuf, src->pageId);
    char * srcBuf = getPosInResultPage(pRuntimeEnv, i, (SWindowResult *)src, srcpage);
    size_t s = pRuntimeEnv->pQuery->pSelectExpr[i].bytes;

--- a/src/rpc/src/rpcMain.c
+++ b/src/rpc/src/rpcMain.c
@@ -20,6 +20,7 @@
 #include "ttimer.h"
 #include "tutil.h"
 #include "lz4.h"
+#include "tref.h"
 #include "taoserror.h"
 #include "tsocket.h"
 #include "tglobal.h"
@@ -72,7 +73,6 @@ typedef struct {
  SRpcInfo *pRpc;       // associated SRpcInfo
  SRpcEpSet epSet;      // ip list provided by app
  void     *ahandle;    // handle provided by app
-  void     *signature;  // for validation
  struct SRpcConn *pConn; // pConn allocated
  char      msgType;    // message type
  uint8_t  *pCont;      // content provided by app
@@ -132,6 +132,10 @@ int tsRpcMaxRetry;
 int tsRpcHeadSize;
 int tsRpcOverhead;
+static int     tsRpcRefId = -1;
+static int32_t tsRpcNum = 0;
+static pthread_once_t tsRpcInit = PTHREAD_ONCE_INIT;
 // server:0 client:1  tcp:2 udp:0
 #define RPC_CONN_UDPS   0
 #define RPC_CONN_UDPC   1
@@ -211,14 +215,26 @@ static void  rpcUnlockConn(SRpcConn *pConn);
 static void  rpcAddRef(SRpcInfo *pRpc);
 static void  rpcDecRef(SRpcInfo *pRpc);
-void *rpcOpen(const SRpcInit *pInit) {
+static void rpcFree(void *p) {
-  SRpcInfo *pRpc;
+  tTrace("free mem: %p", p);
+  free(p);
+}
+static void rpcInit(void) {
  tsProgressTimer = tsRpcTimer/2; 
  tsRpcMaxRetry = tsRpcMaxTime * 1000/tsProgressTimer;
  tsRpcHeadSize = RPC_MSG_OVERHEAD; 
  tsRpcOverhead = sizeof(SRpcReqContext);
+  tsRpcRefId = taosOpenRef(200, rpcFree);
+}
+void *rpcOpen(const SRpcInit *pInit) {
+  SRpcInfo *pRpc;
+  pthread_once(&tsRpcInit, rpcInit);
  pRpc = (SRpcInfo *)calloc(1, sizeof(SRpcInfo));
  if (pRpc == NULL) return NULL;
@@ -237,6 +253,8 @@ void *rpcOpen(const SRpcInit *pInit) {
  pRpc->afp = pInit->afp;
  pRpc->refCount = 1;
+  atomic_add_fetch_32(&tsRpcNum, 1);
  size_t size = sizeof(SRpcConn) * pRpc->sessions;
  pRpc->connList = (SRpcConn *)calloc(1, size);
  if (pRpc->connList == NULL) {
@@ -363,7 +381,6 @@ void rpcSendRequest(void *shandle, const SRpcEpSet *pEpSet, SRpcMsg *pMsg) {
  int contLen = rpcCompressRpcMsg(pMsg->pCont, pMsg->contLen);
  pContext = (SRpcReqContext *) ((char*)pMsg->pCont-sizeof(SRpcHead)-sizeof(SRpcReqContext));
  pContext->ahandle = pMsg->ahandle;
-  pContext->signature = pContext;
  pContext->pRpc = (SRpcInfo *)shandle;
  pContext->epSet = *pEpSet;
  pContext->contLen = contLen;
@@ -386,6 +403,7 @@ void rpcSendRequest(void *shandle, const SRpcEpSet *pEpSet, SRpcMsg *pMsg) {
  // set the handle to pContext, so app can cancel the request
  if (pMsg->handle) *((void **)pMsg->handle) = pContext;
+  taosAddRef(tsRpcRefId, pContext);
  rpcSendReqToServer(pRpc, pContext);
  return;
@@ -536,14 +554,15 @@ int rpcReportProgress(void *handle, char *pCont, int contLen) {
 void rpcCancelRequest(void *handle) {
  SRpcReqContext *pContext = handle;
-  // signature is used to check if pContext is freed. 
+  int code = taosAcquireRef(tsRpcRefId, pContext);
-  // pContext may have been released just before app calls the rpcCancelRequest 
+  if (code < 0) return;
-  if (pContext == NULL || pContext->signature != pContext) return;
  if (pContext->pConn) {
    tDebug("%s, app tries to cancel request", pContext->pConn->info);
    rpcCloseConn(pContext->pConn);
  }
+  taosReleaseRef(tsRpcRefId, pContext);
 }
 static void rpcFreeMsg(void *msg) {
@@ -612,7 +631,7 @@ static void rpcReleaseConn(SRpcConn *pConn) {
    // if there is an outgoing message, free it
    if (pConn->outType && pConn->pReqMsg) {
      if (pConn->pContext) pConn->pContext->pConn = NULL; 
-      rpcFreeMsg(pConn->pReqMsg);
+      taosRemoveRef(tsRpcRefId, pConn->pContext);
    }
  }
@@ -1057,6 +1076,13 @@ static void *rpcProcessMsgFromPeer(SRecvInfo *pRecv) {
        tDebug("%s %p %p, %s is sent with error code:0x%x", pRpc->label, pConn, (void *)pHead->ahandle, taosMsg[pHead->msgType+1], code);
      } 
    } else { // msg is passed to app only parsing is ok 
+      if (pHead->msgType == TSDB_MSG_TYPE_NETWORK_TEST) {
+        rpcSendQuickRsp(pConn, TSDB_CODE_SUCCESS);
+        rpcFreeMsg(pRecv->msg); 
+        return pConn;
+      }
      rpcProcessIncomingMsg(pConn, pHead, pContext);
    }
  }
@@ -1068,7 +1094,6 @@ static void *rpcProcessMsgFromPeer(SRecvInfo *pRecv) {
 static void rpcNotifyClient(SRpcReqContext *pContext, SRpcMsg *pMsg) {
  SRpcInfo       *pRpc = pContext->pRpc;
-  pContext->signature = NULL;
  pContext->pConn = NULL;
  if (pContext->pRsp) { 
    // for synchronous API
@@ -1085,7 +1110,7 @@ static void rpcNotifyClient(SRpcReqContext *pContext, SRpcMsg *pMsg) {
  }
  // free the request message
-  rpcFreeCont(pContext->pCont); 
+  taosRemoveRef(tsRpcRefId, pContext); 
 }
 static void rpcProcessIncomingMsg(SRpcConn *pConn, SRpcHead *pHead, SRpcReqContext *pContext) {
@@ -1593,6 +1618,12 @@ static void rpcDecRef(SRpcInfo *pRpc)
    pthread_mutex_destroy(&pRpc->mutex);
    tDebug("%s rpc resources are released", pRpc->label);
    taosTFree(pRpc);
+    int count = atomic_sub_fetch_32(&tsRpcNum, 1);
+    if (count == 0) {
+      taosCloseRef(tsRpcRefId);
+      // tsRpcInit = PTHREAD_ONCE_INIT;    // windows compliling error  
+    }
  }
 }
--- a/src/sync/src/syncRestore.c
+++ b/src/sync/src/syncRestore.c
@@ -56,6 +56,7 @@ static int syncRestoreFile(SSyncPeer *pPeer, uint64_t *fversion) {
  int        code = -1;
  char       name[TSDB_FILENAME_LEN * 2] = {0};
  uint32_t   pindex = 0;    // index in last restore
+  bool       fileChanged = false;
  *fversion = 0;
  sinfo.index = 0;
@@ -114,10 +115,11 @@ static int syncRestoreFile(SSyncPeer *pPeer, uint64_t *fversion) {
    close(dfd);
    if (ret < 0) break;
+    fileChanged = true;
    sDebug("%s, %s is received, size:%" PRId64, pPeer->id, minfo.name, minfo.size);
  }
-  if (code == 0 && (minfo.fversion != sinfo.fversion)) {
+  if (code == 0 && fileChanged) {
    // data file is changed, code shall be set to 1
    *fversion = minfo.fversion;
    code = 1;

--- a/src/tsdb/src/tsdbFile.c
+++ b/src/tsdb/src/tsdbFile.c
@@ -79,7 +79,7 @@ int tsdbOpenFileH(STsdbRepo *pRepo) {
  DIR *   dir = NULL;
  int     fid = 0;
  int     vid = 0;
-  regex_t regex1, regex2;
+  regex_t regex1 = {0}, regex2 = {0};
  int     code = 0;
  char    fname[TSDB_FILENAME_LEN] = "\0";
@@ -95,9 +95,27 @@ int tsdbOpenFileH(STsdbRepo *pRepo) {
  dir = opendir(tDataDir);
  if (dir == NULL) {
-    tsdbError("vgId:%d failed to open directory %s since %s", REPO_ID(pRepo), tDataDir, strerror(errno));
+    if (errno == ENOENT) {
-    terrno = TAOS_SYSTEM_ERROR(errno);
+      tsdbError("vgId:%d directory %s not exist", REPO_ID(pRepo), tDataDir);
-    goto _err;
+      terrno = TAOS_SYSTEM_ERROR(errno);
+      if (taosMkDir(tDataDir, 0755) < 0) {
+        tsdbError("vgId:%d failed to create directory %s since %s", REPO_ID(pRepo), tDataDir, strerror(errno));
+        terrno = TAOS_SYSTEM_ERROR(errno);
+        goto _err;
+      }
+      dir = opendir(tDataDir);
+      if (dir == NULL) {
+        tsdbError("vgId:%d failed to open directory %s since %s", REPO_ID(pRepo), tDataDir, strerror(errno));
+        terrno = TAOS_SYSTEM_ERROR(errno);
+        goto _err;
+      }
+    } else {
+      tsdbError("vgId:%d failed to open directory %s since %s", REPO_ID(pRepo), tDataDir, strerror(errno));
+      terrno = TAOS_SYSTEM_ERROR(errno);
+      goto _err;
+    }
  }
  code = regcomp(&regex1, "^v[0-9]+f[0-9]+\\.(head|data|last|stat)$", REG_EXTENDED);

--- a/src/util/CMakeLists.txt
+++ b/src/util/CMakeLists.txt
 CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
 PROJECT(TDengine)
+INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/src/rpc/inc)
 AUX_SOURCE_DIRECTORY(src SRC)
 ADD_LIBRARY(tutil ${SRC})
 TARGET_LINK_LIBRARIES(tutil pthread osdetail lz4 z)

--- a/src/util/inc/tnettest.h
+++ b/src/util/inc/tnettest.h
@@ -20,7 +20,27 @@
 extern "C" {
 #endif
-void taosNetTest(const char* host, uint16_t port, uint16_t endPort, int pktLen, const char* netTestRole);
+typedef struct CmdArguments {
+  char* host;
+  char* password;
+  char* user;
+  char* auth;
+  char* database;
+  char* timezone;
+  bool  is_raw_time;
+  bool  is_use_passwd;
+  char  file[TSDB_FILENAME_LEN];
+  char  dir[TSDB_FILENAME_LEN];
+  int   threadNum;
+  char* commands;
+  int   abort;
+  int   port;
+  int   endPort;
+  int   pktLen;
+  char* netTestRole;
+} CmdArguments;
+void taosNetTest(CmdArguments* args);
 #ifdef __cplusplus
 }

--- a/src/util/inc/tref.h
+++ b/src/util/inc/tref.h
+/*
+ * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
+ *
+ * This program is free software: you can use, redistribute, and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3
+ * or later ("AGPL"), as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef TDENGINE_TREF_H
+#define TDENGINE_TREF_H
+#ifdef __cplusplus
+extern "C" {
+#endif
+int  taosOpenRef(int max, void (*fp)(void *)); // return refId which will be used by other APIs
+void taosCloseRef(int refId); 
+int  taosListRef();  // return the number of references in system
+int  taosAddRef(int refId, void *p);
+int  taosAcquireRef(int refId, void *p);
+void taosReleaseRef(int refId, void *p);
+#define taosRemoveRef taosReleaseRef
+#ifdef __cplusplus
+}
+#endif
+#endif  // TDENGINE_TREF_H
--- a/src/util/src/tnettest.c
+++ b/src/util/src/tnettest.c
@@ -15,11 +15,16 @@
 #include "os.h"
 #include "taosdef.h"
+#include "taosmsg.h"
 #include "taoserror.h"
 #include "tulog.h"
 #include "tconfig.h"
 #include "tglobal.h"
 #include "tsocket.h"
+#include "trpc.h"
+#include "rpcHead.h"
+#include "tutil.h"
+#include "tnettest.h"
 #define    MAX_PKG_LEN          (64*1000)
 #define    BUFFER_SIZE          (MAX_PKG_LEN + 1024)
@@ -30,9 +35,15 @@ typedef struct {
  uint16_t pktLen;
 } info_s;
-static char serverFqdn[TSDB_FQDN_LEN];
+extern int tsRpcMaxUdpSize;
+static char g_user[TSDB_USER_LEN+1]     = {0};
+static char g_pass[TSDB_PASSWORD_LEN+1] = {0};
+static char g_serverFqdn[TSDB_FQDN_LEN] = {0};
 static uint16_t g_startPort = 0;
 static uint16_t g_endPort   = 6042;
+static uint32_t g_pktLen    = 0;
 static void *bindUdpPort(void *sarg) {
  info_s *pinfo = (info_s *)sarg;
@@ -321,19 +332,145 @@ static void checkPort(uint32_t hostIp, uint16_t startPort, uint16_t maxPort, uin
  return ;
 }
-static void taosNetTestClient(const char* serverFqdn, uint16_t startPort, uint16_t endPort, int pktLen) {
+void* tnetInitRpc(char* secretEncrypt, char spi) {
-  uint32_t serverIp = taosGetIpFromFqdn(serverFqdn);
+  SRpcInit rpcInit;
-  if (serverIp == 0xFFFFFFFF) {
+  void* pRpcConn = NULL;
-    printf("Failed to resolve FQDN:%s", serverFqdn); 
-    exit(-1);
+  taosEncryptPass((uint8_t *)g_pass, strlen(g_pass), secretEncrypt);
+  memset(&rpcInit, 0, sizeof(rpcInit));
+  rpcInit.localPort = 0;
+  rpcInit.label = "NET-TEST";
+  rpcInit.numOfThreads = 1;  // every DB connection has only one thread
+  rpcInit.cfp = NULL;
+  rpcInit.sessions = 16;
+  rpcInit.connType = TAOS_CONN_CLIENT;
+  rpcInit.user = g_user;
+  rpcInit.idleTime = 2000;
+  rpcInit.ckey = "key";
+  rpcInit.spi = spi;
+  rpcInit.secret = secretEncrypt;
+  pRpcConn = rpcOpen(&rpcInit);
+  return pRpcConn;
+}
+static int rpcCheckPortImpl(const char* serverFqdn, uint16_t port, uint16_t pktLen, char spi) {  
+  SRpcEpSet epSet;
+  SRpcMsg   reqMsg;
+  SRpcMsg   rspMsg;
+  void*     pRpcConn;
+  char secretEncrypt[32] = {0};
+  pRpcConn = tnetInitRpc(secretEncrypt, spi);
+  if (NULL == pRpcConn) {
+    return -1;
  }
-  checkPort(serverIp, startPort, endPort, pktLen);
+  memset(&epSet, 0, sizeof(SRpcEpSet));
+  epSet.inUse = 0;
+  epSet.numOfEps = 1;
+  epSet.port[0] = port;
+  strcpy(epSet.fqdn[0], serverFqdn);
+  reqMsg.msgType = TSDB_MSG_TYPE_NETWORK_TEST;
+  reqMsg.pCont = rpcMallocCont(pktLen);
+  reqMsg.contLen = pktLen;
+  reqMsg.code = 0;
+  reqMsg.handle = NULL;   // rpc handle returned to app
+  reqMsg.ahandle = NULL;   // app handle set by client
+  rpcSendRecv(pRpcConn, &epSet, &reqMsg, &rspMsg);
+  // handle response
+  if ((rspMsg.code != 0) || (rspMsg.msgType != TSDB_MSG_TYPE_NETWORK_TEST + 1)) {
+    //printf("code:%d[%s]\n", rspMsg.code, tstrerror(rspMsg.code));
+    return -1;
+  }
+  rpcFreeCont(rspMsg.pCont);
-  return;
+  rpcClose(pRpcConn);
+  return 0;
+}
+static void rpcCheckPort(uint32_t hostIp) {
+  int ret;
+  char spi;
+  for (uint16_t port = g_startPort; port <= g_endPort; port++) {
+    //printf("test: %s:%d\n", info.host, port);
+    printf("\n");
+    //================ check tcp port ================ 
+    int32_t pktLen;
+    if (g_pktLen <= tsRpcMaxUdpSize) {
+      pktLen = tsRpcMaxUdpSize + 1000;
+    } else {
+      pktLen = g_pktLen;
+    }
+    spi = 1;
+    ret = rpcCheckPortImpl(g_serverFqdn, port, pktLen, spi);
+    if (ret != 0) {
+      spi = 0;
+      ret = rpcCheckPortImpl(g_serverFqdn, port, pktLen, spi);
+      if (ret != 0) {        
+        printf("TCP port:%d test fail.\t\t", port);
+      } else {
+        //printf("tcp port:%d test ok.\t\t", port);
+        printf("TCP port:\033[32m%d test OK\033[0m\t\t", port);
+      }      
+    } else {
+      //printf("tcp port:%d test ok.\t\t", port);
+      printf("TCP port:\033[32m%d test OK\033[0m\t\t", port);
+    }
+    //================ check udp port ================ 
+    if (g_pktLen >= tsRpcMaxUdpSize) {
+      pktLen = tsRpcMaxUdpSize - 1000;
+    } else {
+      pktLen = g_pktLen;
+    }
+    spi = 0;
+    ret = rpcCheckPortImpl(g_serverFqdn, port, pktLen, spi);
+    if (ret != 0) {
+      spi = 1;
+      ret = rpcCheckPortImpl(g_serverFqdn, port, pktLen, spi);
+      if (ret != 0) {        
+        printf("udp port:%d test fail.\t\n", port);
+      } else {
+        //printf("udp port:%d test ok.\t\n", port);
+        printf("UDP port:\033[32m%d test OK\033[0m\t\n", port);
+      }      
+    } else {
+      //printf("udp port:%d test ok.\t\n", port);
+      printf("UDP port:\033[32m%d test OK\033[0m\t\n", port);
+    }
+  }
+  printf("\n");
+  return ;
 }
+static void taosNetTestClient(int flag) {
+  uint32_t serverIp = taosGetIpFromFqdn(g_serverFqdn);
+  if (serverIp == 0xFFFFFFFF) {
+    printf("Failed to resolve FQDN:%s", g_serverFqdn); 
+    exit(-1);
+  }
+  if (0 == flag) {
+    checkPort(serverIp, g_startPort, g_endPort, g_pktLen);
+  } else {
+    rpcCheckPort(serverIp);
+  }
+  return;
+}
 static void taosNetTestServer(uint16_t startPort, uint16_t endPort, int pktLen) {
@@ -375,49 +512,66 @@ static void taosNetTestServer(uint16_t startPort, uint16_t endPort, int pktLen)
 }
-void taosNetTest(const char* host, uint16_t port, uint16_t endPort, int pktLen, const char* netTestRole) {
+void taosNetTest(CmdArguments *args) {
-  if (pktLen > MAX_PKG_LEN) {
+  if (0 == args->pktLen) {
-    printf("test packet len overflow: %d, max len not greater than %d bytes\n", pktLen, MAX_PKG_LEN);
+    g_pktLen = 1000;
-    exit(-1);
+  } else {
+    g_pktLen = args->pktLen;
  }
-  if (port && endPort) {
+  if (args->port && args->endPort) {
-    if (port > endPort) {
+    if (args->port > args->endPort) {
-      printf("endPort[%d] must not lesss port[%d]\n", endPort, port);
+      printf("endPort[%d] must not lesss port[%d]\n", args->endPort, args->port);
      exit(-1);
    }
  }  
-  if (host && host[0] != 0) {
+  if (args->host && args->host[0] != 0) {
-    if (strlen(host) >= TSDB_EP_LEN) {
+    if (strlen(args->host) >= TSDB_EP_LEN) {
-      printf("host invalid: %s\n", host);
+      printf("host invalid: %s\n", args->host);
      exit(-1);
    }
-    taosGetFqdnPortFromEp(host, serverFqdn, &g_startPort);
+    taosGetFqdnPortFromEp(args->host, g_serverFqdn, &g_startPort);
  } else {
-    tstrncpy(serverFqdn, "127.0.0.1", TSDB_IPv4ADDR_LEN);    
+    tstrncpy(g_serverFqdn, "127.0.0.1", TSDB_IPv4ADDR_LEN);    
    g_startPort = tsServerPort;
  }
-  if (port) {
+  if (args->port) {
-    g_startPort = port;
+    g_startPort = args->port;
  }
-  if (endPort) {
+  if (args->endPort) {
-    g_endPort = endPort;
+    g_endPort = args->endPort;
  }
-  if (port > endPort) {
+  if (g_startPort > g_endPort) {
    printf("endPort[%d] must not lesss port[%d]\n", g_endPort, g_startPort);
    exit(-1);
  }
+  if (args->is_use_passwd) {
+    if (args->password == NULL) args->password = getpass("Enter password: ");
+  } else {
+    args->password = TSDB_DEFAULT_PASS;
+  }
+  tstrncpy(g_pass, args->password, TSDB_PASSWORD_LEN);
+  if (args->user == NULL) {
+    args->user = TSDB_DEFAULT_USER;
+  }
+  tstrncpy(g_user, args->user, TSDB_USER_LEN);
-  if (0 == strcmp("client", netTestRole)) {
+  if (0 == strcmp("client", args->netTestRole)) {
-    printf("host: %s\tstart port: %d\tend port: %d\tpacket len: %d\n", serverFqdn, g_startPort, g_endPort, pktLen);
+    printf("host: %s\tstart port: %d\tend port: %d\tpacket len: %d\n", g_serverFqdn, g_startPort, g_endPort, g_pktLen);
-    taosNetTestClient(serverFqdn, g_startPort, g_endPort, pktLen);
+    taosNetTestClient(0);
-  } else if (0 == strcmp("server", netTestRole)) {
+  } else if (0 == strcmp("clients", args->netTestRole)) {
-    taosNetTestServer(g_startPort, g_endPort, pktLen);
+    printf("host: %s\tstart port: %d\tend port: %d\tpacket len: %d\n", g_serverFqdn, g_startPort, g_endPort, g_pktLen);
+    taosNetTestClient(1);
+  } else if (0 == strcmp("server", args->netTestRole)) {
+    taosNetTestServer(g_startPort, g_endPort, g_pktLen);
  }
 }
--- a/src/util/src/tref.c
+++ b/src/util/src/tref.c
+/*
+ * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
+ *
+ * This program is free software: you can use, redistribute, and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3
+ * or later ("AGPL"), as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#include "os.h"
+#include "taoserror.h"
+#include "tulog.h"
+#include "tutil.h"
+#define TSDB_REF_OBJECTS       50
+#define TSDB_REF_STATE_EMPTY   0
+#define TSDB_REF_STATE_ACTIVE  1
+#define TSDB_REF_STATE_DELETED 2
+typedef struct SRefNode {
+  struct SRefNode  *prev;
+  struct SRefNode  *next;
+  void             *p;
+  int32_t           count;
+} SRefNode;
+typedef struct {
+  SRefNode **nodeList;
+  int        state;  // 0: empty, 1: active;  2: deleted
+  int        refId;
+  int        max;
+  int32_t    count;  // total number of SRefNodes in this set
+  int64_t   *lockedBy;
+  void     (*fp)(void *);
+} SRefSet;
+static SRefSet         tsRefSetList[TSDB_REF_OBJECTS];
+static pthread_once_t  tsRefModuleInit = PTHREAD_ONCE_INIT;
+static pthread_mutex_t tsRefMutex;
+static int             tsRefSetNum = 0;
+static int             tsNextId = 0;
+static void taosInitRefModule(void);
+static int  taosHashRef(SRefSet *pSet, void *p); 
+static void taosLockList(int64_t *lockedBy);
+static void taosUnlockList(int64_t *lockedBy);
+static void taosIncRefCount(SRefSet *pSet);
+static void taosDecRefCount(SRefSet *pSet);
+int taosOpenRef(int max, void (*fp)(void *))
+{
+  SRefNode **nodeList;
+  SRefSet   *pSet;
+  int64_t   *lockedBy;
+  int        i, refId;
+  pthread_once(&tsRefModuleInit, taosInitRefModule);
+  nodeList = calloc(sizeof(SRefNode *), (size_t)max);
+  if (nodeList == NULL) {
+    return TSDB_CODE_REF_NO_MEMORY;
+  }
+  lockedBy = calloc(sizeof(int64_t), (size_t)max);
+  if (lockedBy == NULL) {
+    free(nodeList);
+    return TSDB_CODE_REF_NO_MEMORY;
+  }
+  pthread_mutex_lock(&tsRefMutex);
+  for (i = 0; i < TSDB_REF_OBJECTS; ++i) {
+    tsNextId = (tsNextId + 1) % TSDB_REF_OBJECTS;
+    if (tsRefSetList[tsNextId].state == TSDB_REF_STATE_EMPTY) break;
+  } 
+  if (i < TSDB_REF_OBJECTS) {
+    refId = tsNextId;
+    pSet = tsRefSetList + refId;
+    taosIncRefCount(pSet);
+    pSet->max = max;
+    pSet->nodeList = nodeList;
+    pSet->lockedBy = lockedBy;
+    pSet->fp = fp;
+    pSet->state = TSDB_REF_STATE_ACTIVE;
+    pSet->refId = refId;
+    tsRefSetNum++;
+    uTrace("refId:%d is opened, max:%d, fp:%p refSetNum:%d", refId, max, fp, tsRefSetNum);
+  } else {
+    refId = TSDB_CODE_REF_FULL;
+    free (nodeList);
+    free (lockedBy);
+    uTrace("run out of Ref ID, maximum:%d refSetNum:%d", TSDB_REF_OBJECTS, tsRefSetNum);
+  } 
+  pthread_mutex_unlock(&tsRefMutex);
+  return refId;
+}
+void taosCloseRef(int refId)
+{
+  SRefSet  *pSet;
+  int       deleted = 0;
+  if (refId < 0 || refId >= TSDB_REF_OBJECTS) {
+    uTrace("refId:%d is invalid, out of range", refId);
+    return;
+  }
+  pSet = tsRefSetList + refId;
+  pthread_mutex_lock(&tsRefMutex);
+  if (pSet->state == TSDB_REF_STATE_ACTIVE) { 
+    pSet->state = TSDB_REF_STATE_DELETED;
+    deleted = 1;
+    uTrace("refId:%d is closed, count:%d", refId, pSet->count);
+  } else {
+    uTrace("refId:%d is already closed, count:%d", refId, pSet->count);
+  }
+  pthread_mutex_unlock(&tsRefMutex);
+  if (deleted) taosDecRefCount(pSet);
+}
+int taosAddRef(int refId, void *p) 
+{
+  int       hash;
+  SRefNode *pNode;
+  SRefSet  *pSet;
+  if (refId < 0 || refId >= TSDB_REF_OBJECTS) {
+    uTrace("refId:%d p:%p failed to add, refId not valid", refId, p);
+    return TSDB_CODE_REF_INVALID_ID;
+  }
+  uTrace("refId:%d p:%p try to add", refId, p);
+  pSet = tsRefSetList + refId;
+  taosIncRefCount(pSet);
+  if (pSet->state != TSDB_REF_STATE_ACTIVE) {
+    taosDecRefCount(pSet);
+    uTrace("refId:%d p:%p failed to add, not active", refId, p);
+    return TSDB_CODE_REF_ID_REMOVED;
+  }
+  int code = 0;
+  hash = taosHashRef(pSet, p);
+  taosLockList(pSet->lockedBy+hash);
+  pNode = pSet->nodeList[hash];
+  while (pNode) {
+    if (pNode->p == p)
+      break;
+    pNode = pNode->next;  
+  }
+  if (pNode) {
+    code = TSDB_CODE_REF_ALREADY_EXIST;
+    uTrace("refId:%d p:%p is already there, faild to add", refId, p);
+  } else {
+    pNode = calloc(sizeof(SRefNode), 1);
+    if (pNode) {
+      pNode->p = p;
+      pNode->count = 1;
+      pNode->prev = 0;
+      pNode->next = pSet->nodeList[hash];
+      if (pSet->nodeList[hash]) pSet->nodeList[hash]->prev = pNode;
+      pSet->nodeList[hash] = pNode;
+      uTrace("refId:%d p:%p is added, count:%d  malloc mem: %p", refId, p, pSet->count, pNode);
+    } else {
+      code = TSDB_CODE_REF_NO_MEMORY;
+      uTrace("refId:%d p:%p is not added, since no memory", refId, p);
+    }
+  }
+  if (code < 0) taosDecRefCount(pSet);
+  taosUnlockList(pSet->lockedBy+hash);
+  return code; 
+}
+int taosAcquireRef(int refId, void *p) 
+{
+  int       hash, code = 0;
+  SRefNode *pNode;
+  SRefSet  *pSet;
+  if (refId < 0 || refId >= TSDB_REF_OBJECTS) {
+    uTrace("refId:%d p:%p failed to acquire, refId not valid", refId, p);
+    return TSDB_CODE_REF_INVALID_ID;
+  }
+  uTrace("refId:%d p:%p try to acquire", refId, p);
+  pSet = tsRefSetList + refId;
+  taosIncRefCount(pSet);
+  if (pSet->state != TSDB_REF_STATE_ACTIVE) {
+    uTrace("refId:%d p:%p failed to acquire, not active", refId, p);
+    taosDecRefCount(pSet);
+    return TSDB_CODE_REF_ID_REMOVED;
+  }
+  hash = taosHashRef(pSet, p);
+  taosLockList(pSet->lockedBy+hash);
+  pNode = pSet->nodeList[hash];
+  while (pNode) {
+    if (pNode->p == p) {
+      break;
+    }
+    pNode = pNode->next;   
+  }
+  if (pNode) {
+    pNode->count++;
+    uTrace("refId:%d p:%p is acquired", refId, p);
+  } else {
+    code = TSDB_CODE_REF_NOT_EXIST;
+    uTrace("refId:%d p:%p is not there, failed to acquire", refId, p);
+  }
+  taosUnlockList(pSet->lockedBy+hash);
+  taosDecRefCount(pSet);
+  return code;
+}
+void taosReleaseRef(int refId, void *p) 
+{
+  int       hash;
+  SRefNode *pNode;
+  SRefSet  *pSet;
+  int       released = 0;
+  if (refId < 0 || refId >= TSDB_REF_OBJECTS) {
+    uTrace("refId:%d p:%p failed to release, refId not valid", refId, p);
+    return;
+  }
+  uTrace("refId:%d p:%p try to release", refId, p);
+  pSet = tsRefSetList + refId;
+  if (pSet->state == TSDB_REF_STATE_EMPTY) {
+    uTrace("refId:%d p:%p failed to release, cleaned", refId, p);
+    return;
+  }
+  hash = taosHashRef(pSet, p);
+  taosLockList(pSet->lockedBy+hash);
+  pNode = pSet->nodeList[hash];
+  while (pNode) {
+    if (pNode->p == p)
+      break;
+    pNode = pNode->next;  
+  }
+  if (pNode) {
+    pNode->count--;
+    if (pNode->count == 0) {
+      if ( pNode->prev ) {
+        pNode->prev->next = pNode->next;
+      } else {
+        pSet->nodeList[hash] = pNode->next;  
+      }
+      if ( pNode->next ) {
+        pNode->next->prev = pNode->prev; 
+      } 
+      (*pSet->fp)(pNode->p); 
+      free(pNode);
+      released = 1;
+      uTrace("refId:%d p:%p is removed, count:%d, free mem: %p", refId, p, pSet->count, pNode);
+    } else {
+      uTrace("refId:%d p:%p is released", refId, p);
+    }
+  } else {
+    uTrace("refId:%d p:%p is not there, failed to release", refId, p);
+  }
+  taosUnlockList(pSet->lockedBy+hash);
+  if (released) taosDecRefCount(pSet);
+}
+int taosListRef() {
+  SRefSet  *pSet;
+  SRefNode *pNode;
+  int       num = 0;
+  pthread_mutex_lock(&tsRefMutex);
+  for (int i = 0; i < TSDB_REF_OBJECTS; ++i) {
+    pSet = tsRefSetList + i;
+    if (pSet->state == TSDB_REF_STATE_EMPTY) 
+      continue;
+    uInfo("refId:%d state:%d count::%d", i, pSet->state, pSet->count);
+    for (int j=0; j < pSet->max; ++j) {
+      pNode = pSet->nodeList[j];
+      while (pNode) {
+        uInfo("refId:%d p:%p count:%d", i, pNode->p, pNode->count);
+        pNode = pNode->next;
+        num++;
+      }
+    }  
+  } 
+  pthread_mutex_unlock(&tsRefMutex);
+  return num;
+}
+static int taosHashRef(SRefSet *pSet, void *p) 
+{
+  int     hash = 0;
+  int64_t v = (int64_t)p;
+  for (int i = 0; i < sizeof(v); ++i) {
+    hash += (int)(v & 0xFFFF);
+    v = v >> 16;
+    i = i + 2;
+  }
+  hash = hash % pSet->max;
+  return hash;
+} 
+static void taosLockList(int64_t *lockedBy) {
+  int64_t tid = taosGetPthreadId();
+  int     i = 0;
+  while (atomic_val_compare_exchange_64(lockedBy, 0, tid) != 0) {
+    if (++i % 100 == 0) {
+      sched_yield();
+    }
+  }
+}
+static void taosUnlockList(int64_t *lockedBy) {
+  int64_t tid = taosGetPthreadId();
+  if (atomic_val_compare_exchange_64(lockedBy, tid, 0) != tid) {
+    assert(false);
+  }
+}
+static void taosInitRefModule(void) {
+  pthread_mutex_init(&tsRefMutex, NULL);
+}
+static void taosIncRefCount(SRefSet *pSet) {
+  atomic_add_fetch_32(&pSet->count, 1);
+  uTrace("refId:%d inc count:%d", pSet->refId, pSet->count);
+}
+static void taosDecRefCount(SRefSet *pSet) {
+  int32_t count = atomic_sub_fetch_32(&pSet->count, 1);
+  uTrace("refId:%d dec count:%d", pSet->refId, pSet->count);
+  if (count > 0) return;
+  pthread_mutex_lock(&tsRefMutex);
+  if (pSet->state != TSDB_REF_STATE_EMPTY) {
+    pSet->state = TSDB_REF_STATE_EMPTY;
+    pSet->max = 0;
+    pSet->fp = NULL;
+    taosTFree(pSet->nodeList);
+    taosTFree(pSet->lockedBy);
+    tsRefSetNum--;
+    uTrace("refId:%d is cleaned, refSetNum:%d count:%d", pSet->refId, tsRefSetNum, pSet->count);
+  }
+  pthread_mutex_unlock(&tsRefMutex);
+} 
--- a/src/util/tests/CMakeLists.txt
+++ b/src/util/tests/CMakeLists.txt
@@ -9,7 +9,22 @@ IF (HEADER_GTEST_INCLUDE_DIR AND LIB_GTEST_STATIC_DIR)
    INCLUDE_DIRECTORIES(${HEADER_GTEST_INCLUDE_DIR})
    AUX_SOURCE_DIRECTORY(${CMAKE_CURRENT_SOURCE_DIR} SOURCE_LIST)
+    LIST(REMOVE_ITEM SOURCE_LIST ${CMAKE_CURRENT_SOURCE_DIR}/trefTest.c)
    ADD_EXECUTABLE(utilTest ${SOURCE_LIST})
    TARGET_LINK_LIBRARIES(utilTest tutil common osdetail gtest pthread gcov)
+    LIST(APPEND BIN_SRC ${CMAKE_CURRENT_SOURCE_DIR}/trefTest.c)
+    ADD_EXECUTABLE(trefTest ${BIN_SRC})
+    TARGET_LINK_LIBRARIES(trefTest common tutil)
 ENDIF()
+#IF (TD_LINUX)
+#    ADD_EXECUTABLE(trefTest ./trefTest.c)
+#    TARGET_LINK_LIBRARIES(trefTest tutil common)
+#ENDIF ()
+INCLUDE_DIRECTORIES(${TD_COMMUNITY_DIR}/src/util/inc)
--- a/src/util/tests/trefTest.c
+++ b/src/util/tests/trefTest.c
+#include <stdio.h>
+#include <stdlib.h>
+#include <pthread.h>
+#include <string.h>
+#include <unistd.h>
+#include "os.h"
+#include "tref.h"
+#include "tlog.h"
+#include "tglobal.h"
+#include "taoserror.h"
+#include "tulog.h"
+typedef struct {
+  int  refNum;
+  int  steps;
+  int  refId;
+  void **p;
+} SRefSpace;
+void *takeRefActions(void *param) {
+  SRefSpace *pSpace = (SRefSpace *)param;
+  int code, id;
+  for (int i=0; i < pSpace->steps; ++i) {
+    printf("s");
+    id = random() % pSpace->refNum; 
+    code = taosAddRef(pSpace->refId, pSpace->p[id]);
+    usleep(1);
+    id = random() % pSpace->refNum; 
+    code = taosAcquireRef(pSpace->refId, pSpace->p[id]);
+    if (code >= 0) {
+      usleep(id % 5 + 1);
+      taosReleaseRef(pSpace->refId, pSpace->p[id]);
+    }
+    id = random() % pSpace->refNum; 
+    taosRemoveRef(pSpace->refId, pSpace->p[id]);
+    usleep(id %5 + 1);
+    id = random() % pSpace->refNum; 
+    code = taosAcquireRef(pSpace->refId, pSpace->p[id]);
+    if (code >= 0) {
+      usleep(id % 5 + 1);
+      taosReleaseRef(pSpace->refId, pSpace->p[id]);
+    }
+  }  
+  for (int i=0; i < pSpace->refNum; ++i) {
+    taosRemoveRef(pSpace->refId, pSpace->p[i]);
+  }
+  //uInfo("refId:%d thread exits", pSpace->refId);
+  return NULL;
+}
+void myfree(void *p) {
+  return;
+}
+void *openRefSpace(void *param) {
+  SRefSpace *pSpace = (SRefSpace *)param;
+  printf("c");
+  pSpace->refId = taosOpenRef(10000, myfree);
+  if (pSpace->refId < 0) {
+    printf("failed to open ref, reson:%s\n", tstrerror(pSpace->refId));
+    return NULL;
+  } 
+  pSpace->p = (void **) calloc(sizeof(void *), pSpace->refNum);
+  for (int i=0; i<pSpace->refNum; ++i) {
+    pSpace->p[i] = (void *) malloc(128);
+  }
+  pthread_attr_t thattr;
+  pthread_attr_init(&thattr);
+  pthread_attr_setdetachstate(&thattr, PTHREAD_CREATE_JOINABLE);
+  pthread_t thread1, thread2, thread3;
+  pthread_create(&(thread1), &thattr, takeRefActions, (void *)(pSpace));
+  pthread_create(&(thread2), &thattr, takeRefActions, (void *)(pSpace));
+  pthread_create(&(thread3), &thattr, takeRefActions, (void *)(pSpace));
+  pthread_join(thread1, NULL);
+  pthread_join(thread2, NULL);
+  pthread_join(thread3, NULL);
+  taosCloseRef(pSpace->refId);
+  for (int i=0; i<pSpace->refNum; ++i) {
+    free(pSpace->p[i]);
+  }
+  uInfo("refId:%d main thread exit", pSpace->refId);
+  free(pSpace->p);
+  pSpace->p = NULL;
+  return NULL;
+}
+int main(int argc, char *argv[]) {
+  int refNum = 100;
+  int threads = 10;
+  int steps = 10000;  
+  int loops = 1;
+  uDebugFlag = 143;
+  for (int i=1; i<argc; ++i) {
+    if (strcmp(argv[i], "-n")==0 && i < argc-1) {
+      refNum = atoi(argv[++i]);
+    } else if (strcmp(argv[i], "-s")==0 && i < argc-1) {
+      steps = atoi(argv[++i]);
+    } else if (strcmp(argv[i], "-t")==0 && i < argc-1) {
+      threads = atoi(argv[++i]);
+    } else if (strcmp(argv[i], "-l")==0 && i < argc-1) {
+      loops = atoi(argv[++i]);
+    } else if (strcmp(argv[i], "-d")==0 && i < argc-1) {
+      uDebugFlag = atoi(argv[i]);
+    } else {
+      printf("\nusage: %s [options] \n", argv[0]);
+      printf("  [-n]: number of references, default: %d\n", refNum);
+      printf("  [-s]: steps to run for each reference, default: %d\n", steps);
+      printf("  [-t]: number of refIds running in parallel, default: %d\n", threads);
+      printf("  [-l]: number of loops, default: %d\n", loops);
+      printf("  [-d]: debugFlag, default: %d\n", uDebugFlag);
+      exit(0);
+    }
+  }
+  taosInitLog("tref.log", 5000000, 10);
+  SRefSpace *pSpaceList = (SRefSpace *) calloc(sizeof(SRefSpace), threads);
+  pthread_t *pThreadList = (pthread_t *) calloc(sizeof(pthread_t), threads);
+  pthread_attr_t thattr;
+  pthread_attr_init(&thattr);
+  pthread_attr_setdetachstate(&thattr, PTHREAD_CREATE_JOINABLE);
+  for (int i=0; i<loops; ++i) {
+    printf("\nloop: %d\n", i);
+    for (int j=0; j<threads; ++j) {
+      pSpaceList[j].steps = steps;
+      pSpaceList[j].refNum = refNum;
+      pthread_create(&(pThreadList[j]), &thattr, openRefSpace, (void *)(pSpaceList+j));
+    }
+    for (int j=0; j<threads; ++j) {
+      pthread_join(pThreadList[j], NULL);
+    }
+  }
+  int num = taosListRef();
+  printf("\nnumber of references:%d\n", num);
+  free(pSpaceList);
+  free(pThreadList);
+  taosCloseLog();
+  return num;
+}
--- a/src/vnode/src/vnodeMain.c
+++ b/src/vnode/src/vnodeMain.c
@@ -291,11 +291,15 @@ int32_t vnodeOpen(int32_t vnode, char *rootDir) {
  if (pVnode->tsdb == NULL) {
    vnodeCleanUp(pVnode);
    return terrno;
-  } else if (terrno != TSDB_CODE_SUCCESS && pVnode->syncCfg.replica <= 1) {
+  } else if (terrno != TSDB_CODE_SUCCESS) {
    vError("vgId:%d, failed to open tsdb, replica:%d reason:%s", pVnode->vgId, pVnode->syncCfg.replica,
           tstrerror(terrno));
-    vnodeCleanUp(pVnode);
+    if (pVnode->syncCfg.replica <= 1) {
-    return terrno;
+      vnodeCleanUp(pVnode);
+      return terrno;
+    } else {
+      pVnode->version = 0;
+    }
  }
  sprintf(temp, "%s/wal", rootDir);

--- a/src/wal/inc/walInt.h
+++ b/src/wal/inc/walInt.h
+/*
+ * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
+ *
+ * This program is free software: you can use, redistribute, and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3
+ * or later ("AGPL"), as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef TDENGINE_WAL_INT_H
+#define TDENGINE_WAL_INT_H
+#ifdef __cplusplus
+extern "C" {
+#endif
+#include "tlog.h"
+extern int32_t wDebugFlag;
+#define wFatal(...) { if (wDebugFlag & DEBUG_FATAL) { taosPrintLog("WAL FATAL ", 255, __VA_ARGS__); }}
+#define wError(...) { if (wDebugFlag & DEBUG_ERROR) { taosPrintLog("WAL ERROR ", 255, __VA_ARGS__); }}
+#define wWarn(...)  { if (wDebugFlag & DEBUG_WARN)  { taosPrintLog("WAL WARN ", 255, __VA_ARGS__); }}
+#define wInfo(...)  { if (wDebugFlag & DEBUG_INFO)  { taosPrintLog("WAL ", 255, __VA_ARGS__); }}
+#define wDebug(...) { if (wDebugFlag & DEBUG_DEBUG) { taosPrintLog("WAL ", wDebugFlag, __VA_ARGS__); }}
+#define wTrace(...) { if (wDebugFlag & DEBUG_TRACE) { taosPrintLog("WAL ", wDebugFlag, __VA_ARGS__); }}
+#define walPrefix "wal"
+#define walSignature (uint32_t)(0xFAFBFDFE)
+#ifdef __cplusplus
+}
+#endif
+#endif
--- a/src/wal/inc/walMgmt.h
+++ b/src/wal/inc/walMgmt.h
+/*
+ * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
+ *
+ * This program is free software: you can use, redistribute, and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3
+ * or later ("AGPL"), as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef TDENGINE_WAL_MGMT_H
+#define TDENGINE_WAL_MGMT_H
+#ifdef __cplusplus
+extern "C" {
+#endif
+#ifdef __cplusplus
+}
+#endif
+#endif
--- a/src/wal/src/walMgmt.c
+++ b/src/wal/src/walMgmt.c
+/*
+ * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
+ *
+ * This program is free software: you can use, redistribute, and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3
+ * or later ("AGPL"), as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#define _DEFAULT_SOURCE
+#include "os.h"
+#include "taoserror.h"
+#include "twal.h"
+#include "walInt.h"
+#include "walMgmt.h"
\ No newline at end of file
--- a/src/wal/src/walMain.c
+++ b/src/wal/src/walMain.c
@@ -14,11 +14,10 @@
 */
 #define _DEFAULT_SOURCE
-#define TAOS_RANDOM_FILE_FAIL_TEST
 #include "os.h"
-#include "tlog.h"
+#include "twal.h"
+#include "walInt.h"
+#include "walMgmt.h"
 #include "tchecksum.h"
 #include "tutil.h"
 #include "ttimer.h"
@@ -26,14 +25,6 @@
 #include "twal.h"
 #include "tqueue.h"
-#define walPrefix "wal"
-#define wFatal(...) { if (wDebugFlag & DEBUG_FATAL) { taosPrintLog("WAL FATAL ", 255, __VA_ARGS__); }}
-#define wError(...) { if (wDebugFlag & DEBUG_ERROR) { taosPrintLog("WAL ERROR ", 255, __VA_ARGS__); }}
-#define wWarn(...)  { if (wDebugFlag & DEBUG_WARN)  { taosPrintLog("WAL WARN ", 255, __VA_ARGS__); }}
-#define wInfo(...)  { if (wDebugFlag & DEBUG_INFO)  { taosPrintLog("WAL ", 255, __VA_ARGS__); }}
-#define wDebug(...) { if (wDebugFlag & DEBUG_DEBUG) { taosPrintLog("WAL ", wDebugFlag, __VA_ARGS__); }}
-#define wTrace(...) { if (wDebugFlag & DEBUG_TRACE) { taosPrintLog("WAL ", wDebugFlag, __VA_ARGS__); }}
 typedef struct {
  uint64_t version;
@@ -54,7 +45,6 @@ typedef struct {
 static void    *walTmrCtrl = NULL;
 static int     tsWalNum = 0;
 static pthread_once_t walModuleInit = PTHREAD_ONCE_INIT;
-static uint32_t walSignature = 0xFAFBFDFE;
 static int  walHandleExistingFiles(const char *path);
 static int  walRestoreWalFile(SWal *pWal, void *pVnode, FWalWrite writeFp);
 static int  walRemoveWalFiles(const char *path);
@@ -250,11 +240,13 @@ int walWrite(void *handle, SWalHead *pHead) {
  if (taosTWrite(pWal->fd, pHead, contLen) != contLen) {
    wError("wal:%s, failed to write(%s)", pWal->name, strerror(errno));
    terrno = TAOS_SYSTEM_ERROR(errno);
+    return terrno;
  } else {
    pWal->version = pHead->version;
  }
+  ASSERT(contLen == pHead->len + sizeof(SWalHead));
-  return terrno;
+  return 0;
 }
 void walFsync(void *handle) {
@@ -424,7 +416,7 @@ static int walRestoreWalFile(SWal *pWal, void *pVnode, FWalWrite writeFp) {
    if (!taosCheckChecksumWhole((uint8_t *)pHead, sizeof(SWalHead))) {
      wWarn("wal:%s, cksum is messed up, skip the rest of file", name);
      terrno = TSDB_CODE_WAL_FILE_CORRUPTED;
-      // ASSERT(false);
+      ASSERT(false);
      break;
    }

--- a/tests/examples/JDBC/JDBCDemo/README-jdbc-windows.md
+++ b/tests/examples/JDBC/JDBCDemo/README-jdbc-windows.md
+# 如何在 windows环境下使用jdbc进行TDengine应用开发
+本文以windows环境为例，介绍java如何进行TDengine开发应用
+## 环境准备
+（1）安装jdk
+官网下载jdk-1.8，下载页面：https://www.oracle.com/java/technologies/javase/javase-jdk8-downloads.html
+安装，配置环境变量，把jdk加入到环境变量里。
+命令行内查看java的版本。
+```shell
+>java -version
+java version "1.8.0_131"
+Java(TM) SE Runtime Environment (build 1.8.0_131-b11)
+Java HotSpot(TM) 64-Bit Server VM (build 25.131-b11, mixed mode)
+```
+（2）安装配置maven
+官网下载maven，下载地址：http://maven.apache.org/download.cgi
+配置环境变量MAVEN_HOME，将MAVEN_HOME/bin添加到PATH
+命令行里查看maven的版本
+```shell
+>mvn --version
+Apache Maven 3.5.0 (ff8f5e7444045639af65f6095c62210b5713f426; 2017-04-04T03:39:06+08:00)
+Maven home: D:\apache-maven-3.5.0\bin\..
+Java version: 1.8.0_131, vendor: Oracle Corporation
+Java home: C:\Program Files\Java\jdk1.8.0_131\jre
+Default locale: zh_CN, platform encoding: GBK
+OS name: "windows 10", version: "10.0", arch: "amd64", family: "windows"
+```
+为了加快maven下载依赖的速度，可以为maven配置mirror，修改MAVEN_HOME\config\settings.xml文件
+```xml
+<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
+          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+          xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd">
+	<!-- 配置本地maven仓库的路径 -->
+    <localRepository>D:\apache-maven-localRepository</localRepository>
+    <mirrors>
+        <!-- 配置阿里云Maven镜像仓库 -->
+		<mirror>
+			<id>alimaven</id>
+			<name>aliyun maven</name>
+			<url>http://maven.aliyun.com/nexus/content/groups/public/</url>
+			<mirrorOf>central</mirrorOf>
+		</mirror>
+    </mirrors>
+    <profiles>
+        <!-- 配置jdk，maven会默认使用java1.8 -->
+        <profile>
+            <id>jdk-1.8</id>
+            <activation>
+                <activeByDefault>true</activeByDefault>
+                <jdk>1.8</jdk>
+            </activation>
+            <properties>
+                <maven.compiler.source>1.8</maven.compiler.source>
+                <maven.compiler.target>1.8</maven.compiler.target>
+                <maven.compiler.compilerVersion>1.8</maven.compiler.compilerVersion>
+            </properties>
+        </profile>
+    </profiles>
+</settings>
+```
+（3）在linux服务器上安装TDengine-server
+在taosdata官网下载TDengine-server，下载地址：https://www.taosdata.com/cn/all-downloads/
+在linux服务器上安装TDengine-server
+```shell
+# tar -zxvf package/TDengine-server-2.0.1.1-Linux-x64.tar.gz 
+# cd TDengine-server/
+# ./install.sh 
+```
+启动taosd
+```shell
+# systemctl start taosd
+```
+在server上用taos连接taosd
+```shell
+# taos
+taos> show dnodes;
+   id   |           end_point            | vnodes | cores  |     status     |   role   |       create_time       |
+==================================================================================================================
+      1 | td01:6030                      |      2 |      4 | ready          | any      | 2020-08-19 18:40:25.045 |
+Query OK, 1 row(s) in set (0.005765s)
+```
+如果可以正确连接到taosd实例，并打印出databases的信息，说明TDengine的server已经正确启动。这里查看server的hostname
+```shell
+# hostname -f
+td01
+```
+注意，如果安装TDengine后，使用默认的taos.cfg配置文件，taosd会使用当前server的hostname创建dnode实例。之后，在client也需要使用这个hostname来连接taosd。
+（4）在windows上安装TDengine-client
+在taosdata官网下载taos客户端，下载地址：
+https://www.taosdata.com/cn/all-downloads/
+下载后，双击exe安装。
+修改client的hosts文件（C:\Windows\System32\drivers\etc\hosts），将server的hostname和ip配置到client的hosts文件中
+```
+192.168.236.136	td01
+```
+配置完成后，在命令行内使用taos shell连接server端
+```shell
+C:\TDengine>taos
+Welcome to the TDengine shell from Linux, Client Version:2.0.1.1
+Copyright (c) 2017 by TAOS Data, Inc. All rights reserved.
+taos> show databases;
+              name              |      created_time       |   ntables   |   vgroups   | replica | quorum |  days  |    keep1,keep2,keep(D)     |  cache(MB)  |   blocks    |   minrows   |   maxrows   | wallevel |    fsync    | comp | precision |    status    |
+===================================================================================================================================================================================================================================================================
+ test                           | 2020-08-19 18:43:50.731 |           1 |           1 |       1 |      1 |      2 | 3650,3650,3650             |          16 |           6 |         100 |        4096 |        1 |        3000 |    2 | ms        | ready        |
+ log                            | 2020-08-19 18:40:28.064 |           4 |           1 |       1 |      1 |     10 | 30,30,30                   |           1 |           3 |         100 |        4096 |        1 |        3000 |    2 | us        | ready        |
+Query OK, 2 row(s) in set (0.068000s)
+```
+如果windows上的client能够正常连接，并打印database信息，说明client可以正常连接server了。
+## 应用开发
+（1）新建maven工程，在pom.xml中引入taos-jdbcdriver依赖。
+```xml
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>com.taosdata.demo</groupId>
+    <artifactId>JdbcDemo</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <dependencies>
+        <dependency>
+            <groupId>com.taosdata.jdbc</groupId>
+            <artifactId>taos-jdbcdriver</artifactId>
+            <version>2.0.8</version>
+        </dependency>
+    </dependencies>
+</project>
+```
+（2）使用jdbc查询TDengine数据库
+下面是示例代码：
+```java
+public class JdbcDemo {
+    public static void main(String[] args) throws Exception {
+        Connection conn = getConn();
+        Statement stmt = conn.createStatement();
+        // create database
+        stmt.executeUpdate("create database if not exists db");
+        // use database
+        stmt.executeUpdate("use db");
+        // create table
+        stmt.executeUpdate("create table if not exists tb (ts timestamp, temperature int, humidity float)");
+        // insert data
+        int affectedRows = stmt.executeUpdate("insert into tb values(now, 23, 10.3) (now + 1s, 20, 9.3)");
+        System.out.println("insert " + affectedRows + " rows.");
+        // query data
+        ResultSet resultSet = stmt.executeQuery("select * from tb");
+        Timestamp ts = null;
+        int temperature = 0;
+        float humidity = 0;
+        while(resultSet.next()){
+            ts = resultSet.getTimestamp(1);
+            temperature = resultSet.getInt(2);
+            humidity = resultSet.getFloat("humidity");
+            System.out.printf("%s, %d, %s\n", ts, temperature, humidity);
+        }
+    }
+    public static Connection getConn() throws Exception{
+        Class.forName("com.taosdata.jdbc.TSDBDriver");
+        String jdbcUrl = "jdbc:TAOS://td01:0/log?user=root&password=taosdata";
+        Properties connProps = new Properties();
+        connProps.setProperty(TSDBDriver.PROPERTY_KEY_CHARSET, "UTF-8");
+        connProps.setProperty(TSDBDriver.PROPERTY_KEY_LOCALE, "en_US.UTF-8");
+        connProps.setProperty(TSDBDriver.PROPERTY_KEY_TIME_ZONE, "UTC-8");
+        Connection conn = DriverManager.getConnection(jdbcUrl, connProps);
+        return conn;
+    }
+}
+```
+（3）测试jdbc访问tdengine的sever实例
+console输出：
+```
+insert 2 rows.
+2020-08-26 00:06:34.575, 23, 10.3
+2020-08-26 00:06:35.575, 20, 9.3
+```
+## 指南
+（1）如何设置主机名和hosts
+在server上查看hostname和fqdn
+```shell
+查看hostname
+# hostname
+taos-server
+查看fqdn
+# hostname -f
+taos-server
+```
+windows下hosts文件位于：
+C:\\Windows\System32\drivers\etc\hosts
+修改hosts文件，添加server的ip和hostname
+```s
+192.168.56.101  node5
+```
+（2）什么是fqdn？
+> 什么是FQDN？
+>
+> FQDN（Full qualified domain name）全限定域名，fqdn由2部分组成：hostname+domainname。
+>
+> 例如，一个邮件服务器的fqdn可能是：mymail.somecollege.edu，其中mymail是hostname（主机名），somcollege.edu是domainname（域名）。本例中，.edu是顶级域名，.somecollege是二级域名。
+>
+> 当连接服务器时，必须指定fqdn，然后，dns服务器通过查看dns表，将hostname解析为相应的ip地址。如果只指定hostname（不指定domainname），应用程序可能服务解析主机名。因为如果你试图访问不在本地的远程服务器时，本地的dns服务器和可能没有远程服务器的hostname列表。
+>
+> 参考：https://kb.iu.edu/d/aiuv
--- a/tests/examples/go/taosdemo.go
+++ b/tests/examples/go/taosdemo.go
@@ -107,7 +107,7 @@ func main() {
 	fmt.Scanln()
 	url = "root:taosdata@/tcp(" + configPara.hostName + ":" + strconv.Itoa(configPara.serverPort) + ")/"
-    //url = fmt.Sprintf("%s:%s@/tcp(%s:%d)/%s?interpolateParams=true", configPara.user, configPara.password, configPara.hostName, configPara.serverPort, configPara.dbName)
+        //url = fmt.Sprintf("%s:%s@/tcp(%s:%d)/%s?interpolateParams=true", configPara.user, configPara.password, configPara.hostName, configPara.serverPort, configPara.dbName)
 	// open connect to taos server
 	//db, err := sql.Open(taosDriverName, url)
 	//if err != nil {
@@ -115,6 +115,7 @@ func main() {
 	//  os.Exit(1)
 	//}
 	//defer db.Close()
+        rand.Seed(time.Now().Unix())
 	createDatabase(configPara.dbName, configPara.supTblName)
 	fmt.Printf("======== create database success! ========\n\n")

--- a/tests/examples/nodejs/README-win.md
+++ b/tests/examples/nodejs/README-win.md
+# 如何在windows上使用nodejs进行TDengine应用开发
+## 环境准备
+（1）安装nodejs-10.22.0
+下载链接：https://nodejs.org/dist/v10.22.0/node-v10.22.0-win-x64.zip
+解压安装，把node配置到环境变量里
+cmd启动命令行，查看node的版本
+```shell
+> node.exe --version
+v10.22.0
+> npm --version
+6.14.6
+```
+（2）安装python2.7
+下载链接：https://www.python.org/ftp/python/2.7.18/python-2.7.18.amd64.msi
+查看python版本
+```shell
+>python --version
+Python 2.7.18
+```
+（3）安装TDengine-client
+下载地址：https://www.taosdata.com/cn/all-downloads/，选择一个合适的windows-client下载（client应该尽量与server端的版本保持一致）
+使用client的taos shell连接server
+```shell
+>taos -h node5
+Welcome to the TDengine shell from Linux, Client Version:2.0.6.0
+Copyright (c) 2017 by TAOS Data, Inc. All rights reserved.
+taos> show dnodes;
+   id   |           end_point            | vnodes | cores  |    status    |  role   |       create_time       |       offline reason       |
+============================================================================================================================================
+      1 | node5:6030                     |      7 |      1 | ready        | any     | 2020-10-26 09:45:26.308 |                            |
+Query OK, 1 row(s) in set (0.036000s)
+```
+注意：
+* 检查能否在client的机器上ping通server的fqdn
+* 如果你的dns server并没有提供到server的域名解析，可以将server的hostname配置到client的hosts文件中
+## 应用开发
+（1）建立nodejs项目
+```
+npm init
+```
+（2）安装windows-build-tools
+```
+npm install --global --production windows-build-tools
+```
+（3）安装td2.0-connector驱动
+``` tdshell
+npm install td2.0-connector
+```
+（4）nodejs访问tdengine的示例程序
+```javascript
+const taos = require('td2.0-connector');
+var host = null;
+var port = 6030;
+for (var i = 2; i < global.process.argv.length; i++) {
+    var key = global.process.argv[i].split("=")[0];
+    var value = global.process.argv[i].split("=")[1];
+    if ("host" == key) {
+        host = value;
+    }
+    if ("port" == key) {
+        port = value;
+    }
+}
+if (host == null) {
+    console.log("Usage: node nodejsChecker.js host=<hostname> port=<port>");
+    process.exit(0);
+}
+// establish connection
+var conn = taos.connect({host: host, user: "root", password: "taosdata", port: port});
+var cursor = conn.cursor();
+// create database
+executeSql("create database if not exists testnodejs", 0);
+// use db
+executeSql("use testnodejs", 0);
+// drop table
+executeSql("drop table if exists testnodejs.weather", 0);
+// create table
+executeSql("create table if not exists testnodejs.weather(ts timestamp, temperature float, humidity int)", 0);
+// insert
+executeSql("insert into testnodejs.weather (ts, temperature, humidity) values(now, 20.5, 34)", 1);
+// select
+executeQuery("select * from testnodejs.weather");
+// close connection
+conn.close();
+function executeQuery(sql) {
+    var start = new Date().getTime();
+    var promise = cursor.query(sql, true);
+    var end = new Date().getTime();
+    promise.then(function (result) {
+        printSql(sql, result != null, (end - start));
+        result.pretty();
+    });
+}
+function executeSql(sql, affectRows) {
+    var start = new Date().getTime();
+    var promise = cursor.execute(sql);
+    var end = new Date().getTime();
+    printSql(sql, promise == affectRows, (end - start));
+}
+function printSql(sql, succeed, cost) {
+    console.log("[ " + (succeed ? "OK" : "ERROR!") + " ] time cost: " + cost + " ms, execute statement ====> " + sql);
+}
+```
+（5）测试nodejs程序
+```shell
+>node nodejsChecker.js
+Usage: node nodejsChecker.js host=<hostname> port=<port>
+# 提示指定host
+>node nodejsChecker.js host=node5
+Successfully connected to TDengine
+Query OK, 0 row(s) affected (0.00997610s)
+[ OK ] time cost: 14 ms, execute statement ====> create database if not exists testnodejs
+Query OK, 0 row(s) affected (0.00235920s)
+[ OK ] time cost: 4 ms, execute statement ====> use testnodejs
+Query OK, 0 row(s) affected (0.06604280s)
+[ OK ] time cost: 67 ms, execute statement ====> drop table if exists testnodejs.weather
+Query OK, 0 row(s) affected (0.59403290s)
+[ OK ] time cost: 595 ms, execute statement ====> create table if not exists testnodejs.weather(ts timestamp, temperature float, humidity int)
+Query OK, 1 row(s) affected (0.01058950s)
+[ OK ] time cost: 12 ms, execute statement ====> insert into testnodejs.weather (ts, temperature, humidity) values(now, 20.5, 34)
+Query OK, 1 row(s) in set (0.00401490s)
+[ OK ] time cost: 10 ms, execute statement ====> select * from testnodejs.weather
+Connection is closed
+           ts             |       temperature        |  humidity   |
+=====================================================================
+2020-10-27 18:49:15.547   | 20.5                     | 34          |
+```
+## 指南
+### 如何设置主机名和hosts
+在server上查看hostname和fqdn
+```shell
+查看hostname
+# hostname
+taos-server
+查看fqdn
+# hostname -f
+taos-server
+```
+windows下hosts文件位于：
+C:\\Windows\System32\drivers\etc\hosts
+修改hosts文件，添加server的ip和hostname
+```
+192.168.56.101  node5
+```
+> 什么是FQDN？
+>
+> FQDN（Full qualified domain name）全限定域名，fqdn由2部分组成：hostname+domainname。
+>
+> 例如，一个邮件服务器的fqdn可能是：mymail.somecollege.edu，其中mymail是hostname（主机名），somcollege.edu是domainname（域名）。本例中，.edu是顶级域名，.somecollege是二级域名。
+>
+> 当连接服务器时，必须指定fqdn，然后，dns服务器通过查看dns表，将hostname解析为相应的ip地址。如果只指定hostname（不指定domainname），应用程序可能服务解析主机名。因为如果你试图访问不在本地的远程服务器时，本地的dns服务器和可能没有远程服务器的hostname列表。
+>
+> 参考：https://kb.iu.edu/d/aiuv
--- a/tests/examples/nodejs/nodejsChecker.js
+++ b/tests/examples/nodejs/nodejsChecker.js
@@ -42,8 +42,8 @@ function executeQuery(sql){
 	var start = new Date().getTime();
 	var promise = cursor.query(sql, true);
 	var end = new Date().getTime();
-	printSql(sql, promise != null,(end - start));
 	promise.then(function(result){
+		printSql(sql, result != null,(end - start));
 		result.pretty();
 	});
 }

--- a/tests/pytest/crash_gen.sh
+++ b/tests/pytest/crash_gen.sh
@@ -70,10 +70,12 @@ if [[ $1 == '--valgrind' ]]; then
    $CRASH_GEN_EXEC $@ > $VALGRIND_OUT 2> $VALGRIND_ERR 
 elif [[ $1 == '--helgrind' ]]; then
  shift
+  HELGRIND_OUT=helgrind.out 
+  HELGRIND_ERR=helgrind.err
  valgrind  \
    --tool=helgrind \
    $PYTHON_EXEC \
-    $CRASH_GEN_EXEC $@
+    $CRASH_GEN_EXEC $@ > $HELGRIND_OUT 2> $HELGRIND_ERR
 else
  $PYTHON_EXEC $CRASH_GEN_EXEC $@
 fi

--- a/tests/pytest/crash_gen/crash_gen.py
+++ b/tests/pytest/crash_gen/crash_gen.py
@@ -1226,11 +1226,17 @@ class Task():
            "To be implemeted by child classes, class name: {}".format(
                self.__class__.__name__))
+    def _isServiceStable(self):
+        if not gSvcMgr:
+            return True  # we don't run service, so let's assume it's stable
+        return gSvcMgr.isStable() # otherwise let's examine the service
    def _isErrAcceptable(self, errno, msg):
        if errno in [
                0x05,  # TSDB_CODE_RPC_NOT_READY
                0x0B,  # Unable to establish connection, more details in TD-1648
                0x200, # invalid SQL， TODO: re-examine with TD-934
+                0x20F, # query terminated, possibly due to vnoding being dropped, see TD-1776
                0x217, # "db not selected", client side defined error code
                # 0x218, # "Table does not exist" client side defined error code
                0x360, # Table already exists
@@ -1262,7 +1268,7 @@ class Task():
                return True
            elif msg.find("duplicated column names") != -1: # also alter table tag issues
                return True
-        elif gSvcMgr and (not gSvcMgr.isStable()): # We are managing service, and ...
+        elif not self._isServiceStable(): # We are managing service, and ...
            Logging.info("Ignoring error when service starting/stopping: errno = {}, msg = {}".format(errno, msg))
            return True
@@ -1640,15 +1646,39 @@ class TaskReadData(StateTransitionTask):
    def canBeginFrom(cls, state: AnyState):
        return state.canReadData()
+    # def _canRestartService(self):
+    #     if not gSvcMgr:
+    #         return True # always
+    #     return gSvcMgr.isActive() # only if it's running TODO: race condition here
    def _executeInternal(self, te: TaskExecutor, wt: WorkerThread):
        sTable = self._db.getFixedSuperTable()
-        # 1 in 5 chance, simulate a broken connection. 
+        # 1 in 5 chance, simulate a broken connection, only if service stable (not restarting)
-        if random.randrange(5) == 0:  # TODO: break connection in all situations
+        if random.randrange(20)==0: # and self._canRestartService():  # TODO: break connection in all situations
-            wt.getDbConn().close()
+            # Logging.info("Attempting to reconnect to server") # TODO: change to DEBUG
-            wt.getDbConn().open()
+            Progress.emit(Progress.SERVICE_RECONNECT_START) 
-            print("_r", end="", flush=True)
+            try:
+                wt.getDbConn().close()
+                wt.getDbConn().open()
+            except ConnectionError as err: # may fail
+                if not gSvcMgr:
+                    Logging.error("Failed to reconnect in client-only mode")
+                    raise # Not OK if we are running in client-only mode
+                if gSvcMgr.isRunning(): # may have race conditon, but low prob, due to 
+                    Logging.error("Failed to reconnect when managed server is running")
+                    raise # Not OK if we are running normally
+                Progress.emit(Progress.SERVICE_RECONNECT_FAILURE) 
+                # Logging.info("Ignoring DB reconnect error")
+            # print("_r", end="", flush=True)
+            Progress.emit(Progress.SERVICE_RECONNECT_SUCCESS) 
+            # The above might have taken a lot of time, service might be running
+            # by now, causing error below to be incorrectly handled due to timing issue
+            return # TODO: fix server restart status race condtion
        dbc = wt.getDbConn()
        dbName = self._db.getName()
        for rTbName in sTable.getRegTables(dbc, dbName):  # regular tables

--- a/tests/pytest/crash_gen/misc.py
+++ b/tests/pytest/crash_gen/misc.py
@@ -163,11 +163,17 @@ class Progress:
    BEGIN_THREAD_STEP = 1
    END_THREAD_STEP   = 2
    SERVICE_HEART_BEAT= 3
+    SERVICE_RECONNECT_START     = 4
+    SERVICE_RECONNECT_SUCCESS   = 5
+    SERVICE_RECONNECT_FAILURE   = 6
    tokens = {
        STEP_BOUNDARY:      '.',
        BEGIN_THREAD_STEP:  '[',
        END_THREAD_STEP:    '] ',
-        SERVICE_HEART_BEAT: '.Y.'
+        SERVICE_HEART_BEAT: '.Y.',
+        SERVICE_RECONNECT_START:    '<r.',
+        SERVICE_RECONNECT_SUCCESS:  '.r>',
+        SERVICE_RECONNECT_FAILURE:  '.xr>',
    }
    @classmethod

--- a/tests/pytest/crash_gen/service_manager.py
+++ b/tests/pytest/crash_gen/service_manager.py
@@ -280,16 +280,18 @@ class TdeSubProcess:
        # process still alive, let's interrupt it
        print("Terminate running process, send SIG_INT and wait...")
        # sub process should end, then IPC queue should end, causing IO thread to end
-        self.subProcess.send_signal(signal.SIGINT)
+        # sig = signal.SIGINT
+        sig = signal.SIGKILL
+        self.subProcess.send_signal(sig) # SIGNINT or SIGKILL
        self.subProcess.wait(20)
        retCode = self.subProcess.returncode # should always be there
        # May throw subprocess.TimeoutExpired exception above, therefore
        # The process is guranteed to have ended by now
        self.subProcess = None        
        if retCode != 0: # != (- signal.SIGINT):
-            Logging.error("TSP.stop(): Failed to stop sub proc properly w/ SIG_INT, retCode={}".format(retCode))
+            Logging.error("TSP.stop(): Failed to stop sub proc properly w/ SIG {}, retCode={}".format(sig, retCode))
        else:
-            Logging.info("TSP.stop(): sub proc successfully terminated with SIG_INT")
+            Logging.info("TSP.stop(): sub proc successfully terminated with SIG {}".format(sig))
        return - retCode
 class ServiceManager:
@@ -395,6 +397,13 @@ class ServiceManager:
                return True
        return False
+    def isRunning(self):
+        for ti in self._tInsts:
+            if not ti.getStatus().isRunning():
+                return False
+        return True
    # def isRestarting(self):
    #     """
    #     Determine if the service/cluster is being "restarted", i.e., at least

--- a/tests/pytest/fulltest.sh
+++ b/tests/pytest/fulltest.sh
@@ -24,6 +24,7 @@ python3 ./test.py -f table/alter_wal0.py
 python3 ./test.py -f table/column_name.py
 python3 ./test.py -f table/column_num.py
 python3 ./test.py -f table/db_table.py
+python3 ./test.py -f table/create_sensitive.py
 #python3 ./test.py -f table/tablename-boundary.py
 # tag
@@ -150,6 +151,7 @@ python3 ./test.py -f query/select_last_crash.py
 python3 ./test.py -f query/queryNullValueTest.py
 python3 ./test.py -f query/queryInsertValue.py
 python3 ./test.py -f query/queryConnection.py
+python3 ./test.py -f query/queryCountCSVData.py
 python3 ./test.py -f query/natualInterval.py
 python3 ./test.py -f query/bug1471.py
@@ -186,7 +188,7 @@ python3 ./test.py -f functions/function_leastsquares.py -r 1
 python3 ./test.py -f functions/function_max.py -r 1
 python3 ./test.py -f functions/function_min.py -r 1
 python3 ./test.py -f functions/function_operations.py -r 1 
-python3 ./test.py -f functions/function_percentile.py
+python3 ./test.py -f functions/function_percentile.py -r 1
 python3 ./test.py -f functions/function_spread.py -r 1
 python3 ./test.py -f functions/function_stddev.py -r 1
 python3 ./test.py -f functions/function_sum.py -r 1

--- a/tests/pytest/handle_crash_gen_val_log.sh
+++ b/tests/pytest/handle_crash_gen_val_log.sh
+#!/bin/bash
+# Color setting
+RED='\033[0;31m'
+GREEN='\033[1;32m'
+GREEN_DARK='\033[0;32m'
+GREEN_UNDERLINE='\033[4;32m'
+NC='\033[0m'
+grep 'start to execute\|ERROR SUMMARY' valgrind.err|grep -v 'grep'|uniq|tee crash_gen_mem_err.log
+for memError in `grep 'ERROR SUMMARY' crash_gen_mem_err.log | awk '{print $4}'`
+do
+if [ -n "$memError" ]; then
+    if [ "$memError" -gt 12 ]; then
+    echo -e "${RED} ## Memory errors number valgrind reports is $memError.\
+                More than our threshold! ## ${NC}"
+    fi
+fi
+done
+grep 'start to execute\|definitely lost:' valgrind.err|grep -v 'grep'|uniq|tee crash_gen-definitely-lost-out.log
+for defiMemError in `grep 'definitely lost:' crash_gen-definitely-lost-out.log | awk '{print $7}'`
+do
+if [ -n "$defiMemError" ]; then
+    if [ "$defiMemError" -gt 3 ]; then
+    echo -e "${RED} ## Memory errors number valgrind reports \
+                Definitely lost is $defiMemError. More than our threshold! ## ${NC}"
+    exit 8
+    fi
+fi
+done
\ No newline at end of file
--- a/tests/pytest/query/queryCountCSVData.py
+++ b/tests/pytest/query/queryCountCSVData.py
+###################################################################
+#           Copyright (c) 2016 by TAOS Technologies, Inc.
+#                     All rights reserved.
+#
+#  This file is proprietary and confidential to TAOS Technologies.
+#  No part of this file may be reproduced, stored, transmitted,
+#  disclosed or used in any form or by any means other than as
+#  expressly provided by the written permission from Jianhui Tao
+#
+###################################################################
+# -*- coding: utf-8 -*-
+import sys
+import taos
+from util.log import tdLog
+from util.cases import tdCases
+from util.sql import tdSql
+from util.dnodes import tdDnodes
+class TDTestCase:
+    """
+    create table and insert data from disordered.csv which timestamp is disordered and
+    ordered.csv which timestamp is ordered.
+    then execute 'select count(*) from table xx;'
+    """
+    def init(self, conn, logSql):
+        tdLog.debug("start to execute %s" % __file__)
+        tdSql.init(conn.cursor(), logSql)
+    def run(self):
+        tdSql.prepare()
+        print("==============step1")
+        tdSql.execute("create database if not exists demo;");
+        tdSql.execute("use demo;")
+        tdSql.execute("CREATE TABLE IF NOT EXISTS test1 (ts TIMESTAMP, ValueID int, "
+                      "VariantValue float, Quality int, Flags int);")
+        tdSql.execute("CREATE TABLE IF NOT EXISTS test2 (ts TIMESTAMP, ValueID int, "
+                      "VariantValue float, Quality int, Flags int);")
+        ordered_csv = __file__.split('query')[0] + 'test_data/ordered.csv'
+        disordered_csv = __file__.split('query')[0] + 'test_data/disordered.csv'
+        tdSql.execute(" insert into test1 file '{file}';".format(file=ordered_csv))
+        tdSql.execute(" insert into test2 file '{file}';".format(file=disordered_csv))
+        print("==============insert into test1 and test2 form test file")
+        print("==============step2")
+        tdSql.query('select * from test1;')
+        with open(ordered_csv) as f1:
+            num1 = len(f1.readlines())
+        tdSql.checkRows(num1)
+        tdSql.query('select * from test2;')
+        with open(disordered_csv) as f2:
+            num2 = len(f2.readlines())
+        tdSql.checkRows(num2)
+        print("=============execute select count(*) from xxx")
+    def stop(self):
+        tdSql.close()
+        tdLog.success("%s successfully executed" % __file__)
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())
--- a/tests/pytest/query/queryJoin.py
+++ b/tests/pytest/query/queryJoin.py
@@ -95,14 +95,16 @@ class TDTestCase:
        tdSql.error(
            "select stb_t.ts, stb_t.dscrption, stb_t.temperature, stb_t.id, stb_p.dscrption, stb_p.pressure from stb_p, stb_t where stb_p.ts=stb_t.ts and stb_p.id = stb_t.id group by stb_t.id")
        tdSql.error(
-            "select stb_t.ts, stb_t.dscrption, stb_t.temperature, stb_t.id, stb_p.dscrption, stb_p.pressure from stb_p, stb_t where stb_p.ts=stb_t.ts and stb_p.id = stb_t.name;")
+            "select stb_t.ts, stb_t.dscrption, stb_t.temperature, stb_t.id, stb_p.dscrption, stb_p.pressure from stb_p, stb_t where stb_p.ts=stb_t.ts and stb_p.id = stb_t.name;")        
-        tdSql.error(
-            "select stb_t.ts, stb_t.dscrption, stb_t.temperature, stb_t.id, stb_p.dscrption, stb_p.pressure from stb_p, stb_t where stb_p.ts=stb_t.ts and stb_p.location = stb_t.name")
        tdSql.execute("alter table stb_t add tag pid int")
        tdSql.execute("alter table tb_t1 set tag pid=2")
        tdSql.execute("alter table tb_t2 set tag pid=1")
+        tdSql.query(
+            "select stb_t.ts, stb_t.dscrption, stb_t.temperature, stb_t.id, stb_p.dscrption, stb_p.pressure from stb_p, stb_t where stb_p.ts=stb_t.ts and stb_p.location = stb_t.name")
+        tdSql.checkRows(0)
        tdSql.query("select stb_t.ts, stb_t.dscrption, stb_t.temperature, stb_t.id, stb_p.dscrption, stb_p.pressure from stb_p, stb_t where stb_p.ts=stb_t.ts and stb_p.id = stb_t.pid")
        tdSql.checkRows(3)

--- a/tests/pytest/query/queryPerformance.py
+++ b/tests/pytest/query/queryPerformance.py
@@ -11,6 +11,7 @@
 # -*- coding: utf-8 -*-
 import sys
 import os
 import taos
@@ -32,17 +33,23 @@ class taosdemoQueryPerformace:
    def query(self): 
        cursor = self.conn.cursor()                  
-        cursor.execute("use test")        
+        cursor.execute("use test")
        totalTime = 0
-        for i in range(100):
+        for i in range(100):       
-            startTime = time.time()
+            if(sys.argv[1] == '1'):
+                # root permission is required
+                os.system("echo 3 > /proc/sys/vm/drop_caches")  
+            startTime = time.time()            
            cursor.execute("select count(*) from test.meters")
            totalTime += time.time() - startTime
        print("query time for: select count(*) from test.meters %f seconds" % (totalTime / 100))
        totalTime = 0
        for i in range(100):
+            if(sys.argv[1] == '1'):  
+                # root permission is required              
+                os.system("echo 3 > /proc/sys/vm/drop_caches")
            startTime = time.time()
            cursor.execute("select avg(f1), max(f2), min(f3) from test.meters")
            totalTime += time.time() - startTime
@@ -50,6 +57,9 @@ class taosdemoQueryPerformace:
        totalTime = 0
        for i in range(100):
+            if(sys.argv[1] == '1'):
+                # root permission is required
+                os.system("echo 3 > /proc/sys/vm/drop_caches")
            startTime = time.time()
            cursor.execute("select count(*) from test.meters where loc='beijing'")
            totalTime += time.time() - startTime
@@ -57,6 +67,9 @@ class taosdemoQueryPerformace:
        totalTime = 0
        for i in range(100):
+            if(sys.argv[1] == '1'):
+                # root permission is required              
+                os.system("echo 3 > /proc/sys/vm/drop_caches")
            startTime = time.time()
            cursor.execute("select avg(f1), max(f2), min(f3) from test.meters where areaid=10")
            totalTime += time.time() - startTime
@@ -64,6 +77,9 @@ class taosdemoQueryPerformace:
        totalTime = 0
        for i in range(100):
+            if(sys.argv[1] == '1'):                
+                # root permission is required
+                os.system("echo 3 > /proc/sys/vm/drop_caches")
            startTime = time.time()
            cursor.execute("select avg(f1), max(f2), min(f3) from test.t10 interval(10s)")
            totalTime += time.time() - startTime
@@ -71,11 +87,34 @@ class taosdemoQueryPerformace:
        totalTime = 0
        for i in range(100):
+            if(sys.argv[1] == '1'):
+                # root permission is required           
+                os.system("echo 3 > /proc/sys/vm/drop_caches")
            startTime = time.time()
            cursor.execute("select last_row(*) from meters")
            totalTime += time.time() - startTime
        print("query time for: select last_row(*) from meters %f seconds" % (totalTime / 100))
+        totalTime = 0
+        for i in range(100):
+            if(sys.argv[1] == '1'):
+                # root permission is required           
+                os.system("echo 3 > /proc/sys/vm/drop_caches")
+            startTime = time.time()
+            cursor.execute("select * from meters")
+            totalTime += time.time() - startTime
+        print("query time for: select * from meters %f seconds" % (totalTime / 100))
+        totalTime = 0
+        for i in range(100):
+            if(sys.argv[1] == '1'):
+                # root permission is required        
+                os.system("echo 3 > /proc/sys/vm/drop_caches")
+            startTime = time.time()
+            cursor.execute("select avg(f1), max(f2), min(f3) from meters where ts <= '2017-07-15 10:40:01.000' and ts <= '2017-07-15 14:00:40.000'")
+            totalTime += time.time() - startTime
+        print("query time for: select avg(f1), max(f2), min(f3) from meters where ts <= '2017-07-15 10:40:01.000' and ts <= '2017-07-15 14:00:40.000' %f seconds" % (totalTime / 100))
 if __name__ == '__main__':
    perftest = taosdemoQueryPerformace()
    perftest.initConnection()

--- a/tests/pytest/stream/new.py
+++ b/tests/pytest/stream/new.py
@@ -26,7 +26,6 @@ class TDTestCase:
    def run(self):
        rowNum = 200
-        totalNum = 200
        tdSql.prepare()
        tdLog.info("=============== step1")
@@ -42,7 +41,9 @@ class TDTestCase:
        tdSql.execute("create table st as select count(*), count(tbcol), count(tbcol2) from mt interval(10s)")
        tdLog.info("=============== step3")
+        start = time.time()
        tdSql.waitedQuery("select * from st", 1, 120)
+        delay = int(time.time() - start) + 20
        v = tdSql.getData(0, 3)
        if v >= 51:
            tdLog.exit("value is %d, which is larger than 51" % v)
@@ -54,11 +55,18 @@ class TDTestCase:
                tdSql.execute("insert into tb%d values(now + %ds, %d, %d)" % (i, j, j, j))
        tdLog.info("=============== step5")
-        tdLog.sleep(40)
+        maxValue = 0
-        tdSql.waitedQuery("select * from st order by ts desc", 1, 120)
+        for i in range(delay):
-        v = tdSql.getData(0, 3)
+            time.sleep(1)
-        if v <= 51:
+            tdSql.query("select * from st order by ts desc")
-            tdLog.exit("value is %d, which is smaller than 51" % v)
+            v = tdSql.getData(0, 3)
+            if v > maxValue:
+                maxValue = v
+            if v > 51:
+                break
+        if maxValue <= 51:
+            tdLog.exit("value is %d, which is smaller than 51" % maxValue)
    def stop(self):
        tdSql.close()

--- a/tests/pytest/table/create_sensitive.py
+++ b/tests/pytest/table/create_sensitive.py
+# -*- coding: utf-8 -*-
+import sys
+import string
+import random
+import subprocess
+from util.log import *
+from util.cases import *
+from util.sql import *
+class TDTestCase:
+    def init(self, conn, logSql):
+        tdLog.debug("start to execute %s" % __file__)
+        tdSql.init(conn.cursor(), logSql)
+    def run(self):
+        tdSql.prepare()
+        tdLog.info('=============== step1')
+        tdLog.info('create table TestSensitiveT(ts timestamp, i int)')
+        tdSql.execute('create table TestSensitiveT(ts timestamp, i int)')
+        tdLog.info('create table TestSensitiveSt(ts timestamp,i int) tags(j int)')
+        tdSql.execute('create table TestSensitiveSt(ts timestamp,i int) tags(j int)')
+        tdLog.info('create table Abcde using TestSensitiveSt tags(1)')
+        tdSql.execute('create table AbcdeFgh using TestSensitiveSt tags(1)')
+        tdLog.info('=============== step2')
+        tdLog.info('test normal table ')
+        tdSql.error('create table testsensitivet(ts timestamp, i int)')
+        tdSql.error('create table testsensitivet(ts timestamp, j int)')
+        tdSql.error('create table testsensItivet(ts timestamp, j int)')
+        tdSql.error('create table TESTSENSITIVET(ts timestamp, i int)')
+        tdLog.info('=============== step3')
+        tdLog.info('test super table ')
+        tdSql.error('create table testsensitivest(ts timestamp,i int) tags(j int)')
+        tdSql.error('create table testsensitivest(ts timestamp,i int) tags(k int)')
+        tdSql.error('create table TESTSENSITIVEST(ts timestamp,i int) tags(j int)')
+        tdSql.error('create table Testsensitivest(ts timestamp,i int) tags(j int)')
+        tdLog.info('=============== step4')
+        tdLog.info('test subtable ')
+        tdSql.error('create table abcdefgh using TestSensitiveSt tags(1)')
+        tdSql.error('create table ABCDEFGH using TestSensitiveSt tags(1)')
+        tdSql.error('create table Abcdefgh using TestSensitiveSt tags(1)')
+        tdSql.error('create table abcdeFgh using TestSensitiveSt tags(1)')
+        tdSql.error('insert into table abcdefgh using TestSensitiveSt tags(1) values(now,1)')
+        tdSql.error('insert into table ABCDEFGH using TestSensitiveSt tags(1) values(now,1)')
+        tdSql.error('insert into table Abcdefgh using TestSensitiveSt tags(1) values(now,1)')
+        tdSql.error('insert into table abcdeFgH using TestSensitiveSt tags(1) values(now,1)')
+        tdSql.query('show tables')
+        tdLog.info('tdSql.checkRow(0)')
+        tdSql.checkRows(2)
+    def stop(self):
+        tdSql.close()
+        tdLog.success("%s successfully executed" % __file__)
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())
--- a/tests/pytest/test_data/__init__.py
+++ b/tests/pytest/test_data/__init__.py
+###################################################################
+#           Copyright (c) 2016 by TAOS Technologies, Inc.
+#                     All rights reserved.
+#
+#  This file is proprietary and confidential to TAOS Technologies.
+#  No part of this file may be reproduced, stored, transmitted,
+#  disclosed or used in any form or by any means other than as
+#  expressly provided by the written permission from Jianhui Tao
+#
+###################################################################
+"""
+this directory contains test data files
+"""
\ No newline at end of file
--- a/tests/pytest/test_data/disordered.csv
+++ b/tests/pytest/test_data/disordered.csv
+"2020-03-01 20:01:49.493","130","7.595","128","8392704"
+"2020-03-01 20:01:50.493","130","7.598","128","8392704"
+"2020-03-01 20:01:51.493","130","7.602","128","8392704"
+"2020-03-01 20:01:52.493","130","7.604","128","8392704"
+"2020-03-01 20:01:53.493","130","7.604","128","8392704"
+"2020-03-01 20:01:54.493","130","7.606","128","8392704"
+"2020-03-01 20:01:55.493","130","7.607","128","8392704"
+"2020-03-01 20:01:56.493","130","7.607","128","8392704"
+"2020-03-01 20:01:57.493","130","7.607","128","8392704"
+"2020-03-01 20:01:58.493","130","7.607","128","8392704"
+"2020-03-01 20:01:59.493","130","7.606","128","8392704"
+"2020-03-01 20:02:00.493","130","7.606","128","8392704"
+"2020-03-01 20:02:01.493","130","7.606","128","8392704"
+"2020-03-01 20:02:02.493","130","7.607","128","8392704"
+"2020-03-01 20:02:03.493","130","7.608","128","8392704"
+"2020-03-01 20:02:04.493","130","7.609","128","8392704"
+"2020-03-01 20:02:05.493","130","7.609","128","8392704"
+"2020-03-01 20:02:06.493","130","7.608","128","8392704"
+"2020-03-01 20:02:07.493","130","7.606","128","8392704"
+"2020-03-01 20:02:08.493","130","7.606","128","8392704"
+"2020-03-01 20:02:09.493","130","7.607","128","8392704"
+"2020-03-01 20:02:10.493","130","7.609","128","8392704"
+"2020-03-01 20:02:11.493","130","7.61","128","8392704"
+"2020-03-01 20:02:12.493","130","7.611","128","8392704"
+"2020-03-01 20:02:13.493","130","7.61","128","8392704"
+"2020-03-01 20:02:14.493","130","7.607","128","8392704"
+"2020-03-01 20:02:15.493","130","7.605","128","8392704"
+"2020-03-01 20:02:16.493","130","7.604","128","8392704"
+"2020-03-01 20:02:17.493","130","7.603","128","8392704"
+"2020-03-01 20:02:18.493","130","7.604","128","8392704"
+"2020-03-01 20:02:19.493","130","7.604","128","8392704"
+"2020-03-01 20:02:20.493","130","7.603","128","8392704"
+"2020-03-01 20:02:21.493","130","7.601","128","8392704"
+"2020-03-01 20:02:22.493","130","7.598","128","8392704"
+"2020-03-01 20:02:23.493","130","7.595","128","8392704"
+"2020-03-01 20:02:24.493","130","7.594","128","8392704"
+"2020-03-01 20:02:25.493","130","7.594","128","8392704"
+"2020-03-01 20:02:26.493","130","7.595","128","8392704"
+"2020-03-01 20:02:27.493","130","7.596","128","8392704"
+"2020-03-01 20:02:28.493","130","7.596","128","8392704"
+"2020-03-01 20:02:29.493","130","7.598","128","8392704"
+"2020-03-01 20:02:30.493","130","7.6","128","8392704"
+"2020-03-01 20:02:31.493","130","7.6","128","8392704"
+"2020-03-01 20:02:32.493","130","7.6","128","8392704"
+"2020-03-01 20:02:33.493","130","7.601","128","8392704"
+"2020-03-01 20:02:34.493","130","7.603","128","8392704"
+"2020-03-01 20:02:35.493","130","7.604","128","8392704"
+"2020-03-01 20:02:36.493","130","7.605","128","8392704"
+"2020-03-01 20:02:37.493","130","7.606","128","8392704"
+"2020-03-01 20:02:38.493","130","7.61","128","8392704"
+"2020-03-01 20:02:39.493","130","7.611","128","8392704"
+"2020-03-01 20:02:40.493","130","7.61","128","8392704"
+"2020-03-01 20:02:41.493","130","7.609","128","8392704"
+"2020-03-01 20:02:42.493","130","7.611","128","8392704"
+"2020-03-01 20:02:43.493","130","7.61","128","8392704"
+"2020-03-01 20:02:44.493","130","7.607","128","8392704"
+"2020-03-01 20:02:45.493","130","7.605","128","8392704"
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+"2020-03-01 19:53:21.493","130","7.603","128","8392704"
+"2020-03-01 19:53:22.493","130","7.606","128","8392704"
+"2020-03-01 19:53:23.493","130","7.611","128","8392704"
+"2020-03-01 19:53:24.493","130","7.615","128","8392704"
+"2020-03-01 19:53:25.493","130","7.618","128","8392704"
+"2020-03-01 19:53:26.493","130","7.62","128","8392704"
+"2020-03-01 19:53:27.493","130","7.622","128","8392704"
+"2020-03-01 19:53:28.493","130","7.624","128","8392704"
+"2020-03-01 19:53:29.493","130","7.626","128","8392704"
+"2020-03-01 19:53:30.493","130","7.624","128","8392704"
+"2020-03-01 19:53:31.493","130","7.617","128","8392704"
+"2020-03-01 19:53:32.493","130","7.613","128","8392704"
+"2020-03-01 19:53:33.493","130","7.613","128","8392704"
+"2020-03-01 19:53:34.493","130","7.613","128","8392704"
+"2020-03-01 19:53:35.493","130","7.61","128","8392704"
+"2020-03-01 19:53:36.493","130","7.609","128","8392704"
+"2020-03-01 19:53:37.493","130","7.611","128","8392704"
+"2020-03-01 19:53:38.493","130","7.61","128","8392704"
+"2020-03-01 19:53:39.493","130","7.609","128","8392704"
+"2020-03-01 19:53:40.493","130","7.608","128","8392704"
+"2020-03-01 19:53:41.493","130","7.605","128","8392704"
+"2020-03-01 19:53:42.493","130","7.601","128","8392704"
+"2020-03-01 19:53:43.493","130","7.6","128","8392704"
+"2020-03-01 19:53:44.493","130","7.602","128","8392704"
+"2020-03-01 19:53:45.493","130","7.604","128","8392704"
+"2020-03-01 19:53:46.493","130","7.605","128","8392704"
+"2020-03-01 19:53:47.493","130","7.606","128","8392704"
+"2020-03-01 19:53:48.493","130","7.605","128","8392704"
+"2020-03-01 19:53:49.493","130","7.605","128","8392704"
+"2020-03-01 19:53:50.493","130","7.606","128","8392704"
+"2020-03-01 19:53:51.493","130","7.606","128","8392704"
+"2020-03-01 19:53:52.493","130","7.604","128","8392704"
+"2020-03-01 19:53:53.493","130","7.606","128","8392704"
+"2020-03-01 19:53:54.493","130","7.61","128","8392704"
+"2020-03-01 19:53:55.493","130","7.612","128","8392704"
+"2020-03-01 19:53:56.493","130","7.613","128","8392704"
+"2020-03-01 19:53:57.493","130","7.613","128","8392704"
+"2020-03-01 19:53:58.493","130","7.613","128","8392704"
+"2020-03-01 19:53:59.493","130","7.615","128","8392704"
+"2020-03-01 19:54:00.493","130","7.616","128","8392704"
+"2020-03-01 19:54:01.493","130","7.616","128","8392704"
+"2020-03-01 19:54:02.493","130","7.618","128","8392704"
+"2020-03-01 19:54:03.493","130","7.621","128","8392704"
+"2020-03-01 19:54:04.493","130","7.623","128","8392704"
+"2020-03-01 19:54:05.493","130","7.623","128","8392704"
+"2020-03-01 19:54:06.493","130","7.624","128","8392704"
+"2020-03-01 19:54:07.493","130","7.624","128","8392704"
+"2020-03-01 19:54:08.493","130","7.622","128","8392704"
+"2020-03-01 19:54:09.493","130","7.62","128","8392704"
+"2020-03-01 19:54:10.493","130","7.621","128","8392704"
+"2020-03-01 19:54:11.493","130","7.62","128","8392704"
+"2020-03-01 19:54:12.493","130","7.617","128","8392704"
+"2020-03-01 19:54:13.493","130","7.617","128","8392704"
+"2020-03-01 19:54:14.493","130","7.618","128","8392704"
+"2020-03-01 19:54:15.493","130","7.617","128","8392704"
+"2020-03-01 19:54:16.493","130","7.615","128","8392704"
+"2020-03-01 19:54:17.493","130","7.613","128","8392704"
+"2020-03-01 19:54:18.493","130","7.612","128","8392704"
+"2020-03-01 19:54:19.493","130","7.609","128","8392704"
+"2020-03-01 19:54:20.493","130","7.605","128","8392704"
+"2020-03-01 19:54:21.493","130","7.604","128","8392704"
+"2020-03-01 19:54:22.493","130","7.605","128","8392704"
+"2020-03-01 19:54:23.493","130","7.608","128","8392704"
+"2020-03-01 19:54:24.493","130","7.611","128","8392704"
+"2020-03-01 19:54:25.493","130","7.613","128","8392704"
+"2020-03-01 19:54:26.493","130","7.613","128","8392704"
+"2020-03-01 19:54:27.493","130","7.611","128","8392704"
+"2020-03-01 19:54:28.493","130","7.611","128","8392704"
+"2020-03-01 19:54:29.493","130","7.611","128","8392704"
+"2020-03-01 19:54:30.493","130","7.612","128","8392704"
+"2020-03-01 19:54:31.493","130","7.614","128","8392704"
+"2020-03-01 19:54:32.493","130","7.61","128","8392704"
+"2020-03-01 19:54:33.493","130","7.603","128","8392704"
+"2020-03-01 19:54:34.493","130","7.598","128","8392704"
+"2020-03-01 19:54:35.493","130","7.594","128","8392704"
+"2020-03-01 19:54:36.493","130","7.591","128","8392704"
+"2020-03-01 19:54:37.493","130","7.591","128","8392704"
+"2020-03-01 19:54:38.493","130","7.59","128","8392704"
+"2020-03-01 19:54:39.493","130","7.588","128","8392704"
+"2020-03-01 19:54:40.493","130","7.593","128","8392704"
+"2020-03-01 19:54:41.493","130","7.599","128","8392704"
+"2020-03-01 19:54:42.493","130","7.602","128","8392704"
+"2020-03-01 19:54:43.493","130","7.604","128","8392704"
+"2020-03-01 19:54:44.493","130","7.606","128","8392704"
+"2020-03-01 19:54:45.493","130","7.609","128","8392704"
+"2020-03-01 19:54:46.493","130","7.612","128","8392704"
+"2020-03-01 19:54:47.493","130","7.614","128","8392704"
+"2020-03-01 19:54:48.493","130","7.616","128","8392704"
+"2020-03-01 19:54:49.493","130","7.617","128","8392704"
+"2020-03-01 19:54:50.493","130","7.619","128","8392704"
+"2020-03-01 19:54:51.493","130","7.623","128","8392704"
+"2020-03-01 19:54:52.493","130","7.626","128","8392704"
+"2020-03-01 19:54:53.493","130","7.626","128","8392704"
+"2020-03-01 19:54:54.493","130","7.624","128","8392704"
+"2020-03-01 19:54:55.493","130","7.623","128","8392704"
+"2020-03-01 19:54:56.493","130","7.618","128","8392704"
+"2020-03-01 19:54:57.493","130","7.613","128","8392704"
+"2020-03-01 19:54:58.493","130","7.61","128","8392704"
+"2020-03-01 19:54:59.493","130","7.605","128","8392704"
+"2020-03-01 19:55:00.493","130","7.604","128","8392704"
+"2020-03-01 19:55:01.493","130","7.603","128","8392704"
+"2020-03-01 19:55:02.493","130","7.602","128","8392704"
+"2020-03-01 19:55:03.493","130","7.602","128","8392704"
+"2020-03-01 19:55:04.493","130","7.602","128","8392704"
+"2020-03-01 19:55:05.493","130","7.603","128","8392704"
+"2020-03-01 19:55:06.493","130","7.608","128","8392704"
+"2020-03-01 19:55:07.493","130","7.609","128","8392704"
+"2020-03-01 19:55:08.493","130","7.608","128","8392704"
+"2020-03-01 19:55:09.493","130","7.609","128","8392704"
\ No newline at end of file
--- a/tests/script/general/db/nosuchfile.sim
+++ b/tests/script/general/db/nosuchfile.sim
+system sh/stop_dnodes.sh
+system sh/deploy.sh -n dnode1 -i 1
+system sh/cfg.sh -n dnode1 -c wallevel -v 2
+print ========== step1
+system sh/exec.sh -n dnode1 -s start
+sql connect
+sleep 3000
+print ========== step3
+sql create database d1
+sql create table d1.t1 (t timestamp, i int)
+sql insert into d1.t1 values(now+1s, 35)
+sql insert into d1.t1 values(now+2s, 34)
+sql insert into d1.t1 values(now+3s, 33)
+sql insert into d1.t1 values(now+4s, 32)
+sql insert into d1.t1 values(now+5s, 31)
+print ========== step4
+system sh/exec.sh -n dnode1 -s stop  -x SIGINT
+system sh/exec.sh -n dnode1 -s start
+sleep 3000
+print ========== step5
+sql select * from d1.t1 order by t desc
+print $data01 $data11 $data21 $data31 $data41  
+if $data01 != 31 then
+  return -1
+endi
+if $data11 != 32 then
+  return -1
+endi
+if $data21 != 33 then
+  return -1
+endi
+if $data31 != 34 then
+  return -1
+endi
+if $data41 != 35 then
+  return -1
+endi
+print ========== step6
+system_content rm -rf ../../../sim/dnode1/data/vnode/vnode2/tsdb/data
+print ========== step7
+sql select * from d1.t1 order by t desc
+print $data01 $data11 $data21 $data31 $data41  
+if $data01 != null then
+  return -1
+endi
+if $data11 != null then
+  return -1
+endi
+if $data21 != null then
+  return -1
+endi
+if $data31 != null then
+  return -1
+endi
+if $data41 != null then
+  return -1
+endi
+system sh/exec.sh -n dnode1 -s stop  -x SIGINT
\ No newline at end of file
--- a/tests/script/jenkins/basic.txt
+++ b/tests/script/jenkins/basic.txt
@@ -64,6 +64,7 @@ cd ../../../debug; make
 ./test.sh -f general/db/repeat.sim
 ./test.sh -f general/db/tables.sim
 ./test.sh -f general/db/vnodes.sim
+./test.sh -f general/db/nosuchfile.sim
 ./test.sh -f general/field/2.sim
 ./test.sh -f general/field/3.sim
@@ -277,6 +278,7 @@ cd ../../../debug; make
 ./test.sh -f unique/dnode/balance2.sim
 ./test.sh -f unique/dnode/balance3.sim
 ./test.sh -f unique/dnode/balancex.sim
+./test.sh -f unique/dnode/data1.sim
 ./test.sh -f unique/dnode/offline1.sim
 ./test.sh -f unique/dnode/offline2.sim
 ./test.sh -f unique/dnode/reason.sim

--- a/tests/script/unique/dnode/data1.sim
+++ b/tests/script/unique/dnode/data1.sim
+system sh/stop_dnodes.sh
+system sh/deploy.sh -n dnode1 -i 1
+system sh/deploy.sh -n dnode2 -i 2
+system sh/deploy.sh -n dnode3 -i 3
+system sh/deploy.sh -n dnode4 -i 4
+system sh/cfg.sh -n dnode1 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode2 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode3 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode4 -c balanceInterval -v 10
+system sh/cfg.sh -n dnode1 -c mnodeEqualVnodeNum -v 4
+system sh/cfg.sh -n dnode2 -c mnodeEqualVnodeNum -v 4
+system sh/cfg.sh -n dnode3 -c mnodeEqualVnodeNum -v 4
+system sh/cfg.sh -n dnode4 -c mnodeEqualVnodeNum -v 4
+system sh/cfg.sh -n dnode1 -c wallevel -v 2
+system sh/cfg.sh -n dnode2 -c wallevel -v 2
+system sh/cfg.sh -n dnode3 -c wallevel -v 2
+system sh/cfg.sh -n dnode4 -c wallevel -v 2
+print ========== step1
+system sh/exec.sh -n dnode1 -s start
+sql connect
+sleep 3000
+print ========== step2
+sql create dnode $hostname2
+system sh/exec.sh -n dnode2 -s start
+sql create dnode $hostname3
+system sh/exec.sh -n dnode3 -s start
+sql create dnode $hostname4
+system sh/exec.sh -n dnode4 -s start
+$x = 0
+show2: 
+	$x = $x + 1
+	sleep 3000
+	if $x == 10 then 
+		return -1
+	endi
+sql show dnodes
+print dnode1 openVnodes $data2_1
+print dnode2 openVnodes $data2_2
+print dnode3 openVnodes $data2_3
+print dnode4 openVnodes $data2_4
+if $data2_1 != 0 then
+  goto show2
+endi
+if $data2_2 != 0 then
+  goto show2
+endi
+if $data2_3 != 0 then
+  goto show2
+endi
+if $data2_4 != 0 then
+  goto show2
+endi
+print ========== step3
+sql create database d1 replica 3
+sql create table d1.t1 (t timestamp, i int)
+sql insert into d1.t1 values(now+1s, 35)
+sql insert into d1.t1 values(now+2s, 34)
+sql insert into d1.t1 values(now+3s, 33)
+sql insert into d1.t1 values(now+4s, 32)
+sql insert into d1.t1 values(now+5s, 31)
+$x = 0
+show3: 
+	$x = $x + 1
+	sleep 3000
+	if $x == 10 then 
+		return -1
+	endi
+sql show dnodes
+print dnode1 openVnodes $data2_1
+print dnode2 openVnodes $data2_2
+print dnode3 openVnodes $data2_3
+print dnode4 openVnodes $data2_4
+if $data2_1 != 0 then
+  goto show3
+endi
+if $data2_2 != 1 then
+  goto show3
+endi
+if $data2_3 != 1 then
+  goto show3
+endi
+if $data2_4 != 1 then
+  goto show3
+endi
+print ========== step4
+system sh/exec.sh -n dnode2 -s stop  -x SIGINT
+system sh/exec.sh -n dnode3 -s stop  -x SIGINT
+system sh/exec.sh -n dnode4 -s stop  -x SIGINT
+print ========== step5
+system_content rm -rf ../../../sim/dnode4/data/vnode/vnode2/tsdb/data
+print ========== step6
+system sh/exec.sh -n dnode2 -s start
+system sh/exec.sh -n dnode3 -s start
+system sh/exec.sh -n dnode4 -s start
+sleep 10000
+print ========== step7
+sql select * from d1.t1 order by t desc
+print $data01 $data11 $data21 $data31 $data41  
+if $data01 != 31 then
+  return -1
+endi
+if $data11 != 32 then
+  return -1
+endi
+if $data21 != 33 then
+  return -1
+endi
+if $data31 != 34 then
+  return -1
+endi
+if $data41 != 35 then
+  return -1
+endi
+system sh/exec.sh -n dnode1 -s stop  -x SIGINT
+system sh/exec.sh -n dnode2 -s stop  -x SIGINT
+system sh/exec.sh -n dnode3 -s stop  -x SIGINT
+system sh/exec.sh -n dnode4 -s stop  -x SIGINT
+system sh/exec.sh -n dnode5 -s stop  -x SIGINT
+system sh/exec.sh -n dnode6 -s stop  -x SIGINT
+system sh/exec.sh -n dnode7 -s stop  -x SIGINT
+system sh/exec.sh -n dnode8 -s stop  -x SIGINT
\ No newline at end of file