Merge branch 'develop' into test/jenkins

CMakeLists.txt

@@ -13,7 +13,6 @@ ENDIF ()
 SET(TD_ACCOUNT FALSE)
 SET(TD_ADMIN FALSE)
 SET(TD_GRANT FALSE)
-SET(TD_SYNC TRUE)
 SET(TD_MQTT TRUE)
 SET(TD_TSDB_PLUGINS FALSE)
 

Jenkinsfile

@@ -14,10 +14,12 @@ pipeline {
             sh '''
             date
             cd ${WKC}
+            git reset --hard
             git checkout develop
             git pull
             git submodule update
             cd ${WK}
+            git reset --hard
             git checkout develop
             git pull
             export TZ=Asia/Harbin
@@ -39,11 +41,13 @@ pipeline {
           steps {
             sh '''
             cd ${WKC}
+            git reset --hard
             git checkout develop
             git pull
               
             git submodule update
             cd ${WK}
+            git reset --hard
             git checkout develop
             git pull
             export TZ=Asia/Harbin
@@ -65,11 +69,13 @@ pipeline {
           steps {
             sh '''
             cd ${WKC}
+            git reset --hard
             git checkout develop
             git pull
               
             git submodule update
             cd ${WK}
+            git reset --hard
             git checkout develop
             git pull
             export TZ=Asia/Harbin
@@ -108,11 +114,13 @@ pipeline {
           steps {
             sh '''
             cd ${WKC}
+            git reset --hard
             git checkout develop
             git pull
               
             git submodule update
             cd ${WK}
+            git reset --hard
             git checkout develop
             git pull
             export TZ=Asia/Harbin
@@ -167,7 +175,47 @@ pipeline {
           
          }
        }
-
+       stage('arm64_build'){
+                agent{label 'arm64'}
+                steps{
+                    sh '''
+                    cd ${WK}
+                    git fetch
+                    git checkout develop
+                    git pull
+                    cd ${WKC}
+                    git fetch
+                    git checkout develop
+                    git pull
+                    git submodule update                    
+                    cd ${WKC}/packaging
+                    ./release.sh -v cluster -c aarch64 -n 2.0.0.0 -m 2.0.0.0
+                    
+                    '''
+                }
+            }
+            stage('arm32_build'){
+                agent{label 'arm32'}
+                steps{
+                    catchError(buildResult: 'SUCCESS', stageResult: 'FAILURE') {
+                        sh '''
+                        cd ${WK}
+                        git fetch
+                        git checkout develop
+                        git pull
+                        cd ${WKC}
+                        git fetch
+                        git checkout develop
+                        git pull
+                        git submodule update
+                        cd ${WKC}/packaging
+                        ./release.sh -v cluster -c aarch32 -n 2.0.0.0 -m 2.0.0.0
+                        
+                        '''
+                    }
+                    
+                }
+            }
       }
     }
 

cmake/define.inc

@@ -13,10 +13,6 @@ IF (TD_GRANT)
   ADD_DEFINITIONS(-D_GRANT)
 ENDIF ()
 
-IF (TD_SYNC)
-  ADD_DEFINITIONS(-D_SYNC)
-ENDIF ()
-
 IF (TD_MQTT)
   ADD_DEFINITIONS(-D_MQTT)
 ENDIF ()

cmake/input.inc

@@ -47,11 +47,6 @@ IF (${MQTT} MATCHES "false")
   MESSAGE(STATUS "build without mqtt module")
 ENDIF ()
 
-IF (${SYNC} MATCHES "false")
-  SET(TD_SYNC FALSE)
-  MESSAGE(STATUS "build without sync module")
-ENDIF ()
-
 IF (${RANDOM_FILE_FAIL} MATCHES "true")
   SET(TD_RANDOM_FILE_FAIL TRUE)
   MESSAGE(STATUS "build with random-file-fail enabled")

cmake/install.inc

@@ -32,7 +32,7 @@ ELSEIF (TD_WINDOWS)
   #INSTALL(TARGETS taos RUNTIME DESTINATION driver)
   #INSTALL(TARGETS shell RUNTIME DESTINATION .)
   IF (TD_MVN_INSTALLED)
-    INSTALL(FILES ${LIBRARY_OUTPUT_PATH}/taos-jdbcdriver-2.0.13-dist.jar DESTINATION connector/jdbc)
+    INSTALL(FILES ${LIBRARY_OUTPUT_PATH}/taos-jdbcdriver-2.0.14-dist.jar DESTINATION connector/jdbc)
   ENDIF ()
 ELSEIF (TD_DARWIN)
   SET(TD_MAKE_INSTALL_SH "${TD_COMMUNITY_DIR}/packaging/tools/make_install.sh")

cmake/version.inc

@@ -4,7 +4,7 @@ PROJECT(TDengine)
 IF (DEFINED VERNUMBER)
   SET(TD_VER_NUMBER ${VERNUMBER})
 ELSE ()
-  SET(TD_VER_NUMBER "2.0.8.0")
+  SET(TD_VER_NUMBER "2.0.9.0")
 ENDIF ()
 
 IF (DEFINED VERCOMPATIBLE)

documentation20/webdocs/markdowndocs/Model-ch.md

@@ -12,7 +12,7 @@ TDengine采用关系型数据模型，需要建库、建表。因此对于一个
 CREATE DATABASE power KEEP 365 DAYS 10 BLOCKS 4;
 ```
 上述语句将创建一个名为power的库，这个库的数据将保留365天（超过365天将被自动删除），每10天一个数据文件，内存块数为4。详细的语法及参数请见<a href="https://www.taosdata.com/cn/documentation20/taos-sql/">TAOS SQL</a>  
-  
+
 创建库之后，需要使用SQL命令USE将当前库切换过来，例如：
 
 ```cmd
@@ -20,7 +20,7 @@ USE power;
 ```
 
 就当前连接里操作的库换为power，否则对具体表操作前，需要使用“库名.表名”来指定库的名字。  
-  
+
 **注意：**
 
 - 任何一张表或超级表是属于一个库的，在创建表之前，必须先创建库。
@@ -44,15 +44,17 @@ CREATE TABLE d1001 USING meters TAGS ("Beijing.Chaoyang", 2);
 ```
 其中d1001是表名，meters是超级表的表名，后面紧跟标签Location的具体标签值”Beijing.Chaoyang"，标签groupId的具体标签值2。虽然在创建表时，需要指定标签值，但可以事后修改。详细细则请见 TAOS SQL。
 
+**注意：**目前 TDengine 没有从技术层面限制使用一个 database （dbA）的超级表作为模板建立另一个 database （dbB）的子表，后续会禁止这种用法，不建议使用这种方法建表。
+
 TDengine建议将数据采集点的全局唯一ID作为表名(比如设备序列号）。但对于有的场景，并没有唯一的ID，可以将多个ID组合成一个唯一的ID。不建议将具有唯一性的ID作为标签值。  
-  
+
 **自动建表**：在某些特殊场景中，用户在写数据时并不确定某个数据采集点的表是否存在，此时可在写入数据时使用自动建表语法来创建不存在的表，若该表已存在则不会建立新表。比如：
 
 ```cmd
 INSERT INTO d1001 USING METERS TAGS ("Beijng.Chaoyang", 2) VALUES (now, 10.2, 219, 0.32);
 ```
 上述SQL语句将记录(now, 10.2, 219, 0.32) 插入进表d1001。如果表d1001还未创建，则使用超级表meters做模板自动创建，同时打上标签值“Beijing.Chaoyang", 2。  
-  
+
 ## 多列模型 vs 单列模型
 TDengine支持多列模型，只要物理量是一个数据采集点同时采集的（时间戳一致），这些量就可以作为不同列放在一张超级表里。但还有一种极限的设计，单列模型，每个采集的物理量都单独建表，因此每种类型的物理量都单独建立一超级表。比如电流、电压、相位，就建三张超级表。
 

documentation20/webdocs/markdowndocs/administrator-ch.md

@@ -95,6 +95,7 @@ TDengine系统后台服务由taosd提供，可以在配置文件taos.cfg里修
 - logKeepDays：日志文件的最长保存时间。大于0时，日志文件会被重命名为taosdlog.xxx，其中xxx为日志文件最后修改的时间戳，单位为秒。默认值：0天。
 - maxSQLLength：单条SQL语句允许最长限制。默认值：65380字节。
 - telemetryReporting: 是否允许 TDengine 采集和上报基本使用信息，0表示不允许，1表示允许。 默认值：1。
+- stream: 是否启用连续查询（流计算功能），0表示不允许，1表示允许。 默认值：1。
 
 **注意：**对于端口，TDengine会使用从serverPort起13个连续的TCP和UDP端口号，请务必在防火墙打开。因此如果是缺省配置，需要打开从6030都6042共13个端口，而且必须TCP和UDP都打开。
 

documentation20/webdocs/markdowndocs/cluster-ch.md

@@ -37,7 +37,7 @@ fqdn                  h1.taosdata.com
 // 配置本数据节点的端口号，缺省是6030
 serverPort            6030
 
-// 服务端节点数为偶数的时候，需要配置，请参考《Arbitrator的使用》的部分
+// 使用场景，请参考《Arbitrator的使用》的部分
 arbitrator            ha.taosdata.com:6042
 ```
 

documentation20/webdocs/markdowndocs/connector-ch.md

@@ -142,7 +142,7 @@ C/C++的API类似于MySQL的C API。应用程序使用时，需要包含TDengine
   获取最近一次API调用失败的原因，返回值为错误代码。
 
 
-**注意**：对于单个数据库连接，在同一时刻只能有一个线程使用该连接调用API，否则会有未定义的行为出现并可能导致客户端crash。客户端应用可以通过建立多个连接进行多线程的数据写入或查询处理。
+**注意**：对于每个数据库应用，2.0及以上版本 TDengine 推荐只建立一个连接。同时在应用中将该连接 (TAOS*) 结构体传递到不同的线程共享使用。基于 TAOS 结构体发出的查询、写入等操作具有多线程安全性。C 语言的连接器可以按照需求动态建立面向数据库的新连接（该过程对用户不可见），同时建议只有在程序最后退出的时候才调用 taos_close 关闭连接。
 
 
 ### 异步查询API

documentation20/webdocs/markdowndocs/faq-ch.md

@@ -36,16 +36,20 @@
 
 5. ping服务器FQDN，如果没有反应，请检查你的网络，DNS设置，或客户端所在计算机的系统hosts文件
 
-6. 检查防火墙设置，确认TCP/UDP 端口6030-6042 是打开的
+6. 检查防火墙设置（Ubuntu 使用 ufw status，CentOS 使用 firewall-cmd --list-port），确认TCP/UDP 端口6030-6042 是打开的
 
 7. 对于Linux上的JDBC（ODBC, Python, Go等接口类似）连接, 确保*libtaos.so*在目录*/usr/local/taos/driver*里, 并且*/usr/local/taos/driver*在系统库函数搜索路径*LD_LIBRARY_PATH*里 
 
 8. 对于windows上的JDBC, ODBC, Python, Go等连接，确保*C:\TDengine\driver\taos.dll*在你的系统库函数搜索目录里 (建议*taos.dll*放在目录 *C:\Windows\System32*)
 
-9. 如果仍不能排除连接故障，请使用命令行工具nc来分别判断指定端口的TCP和UDP连接是否通畅
-   检查UDP端口连接是否工作：`nc -vuz {hostIP} {port} `
-   检查服务器侧TCP端口连接是否工作：`nc -l {port}`
-   检查客户端侧TCP端口连接是否工作：`nc {hostIP} {port}`
+9. 如果仍不能排除连接故障
+   
+   * Linux 系统请使用命令行工具nc来分别判断指定端口的TCP和UDP连接是否通畅
+     检查UDP端口连接是否工作：`nc -vuz {hostIP} {port} `
+     检查服务器侧TCP端口连接是否工作：`nc -l {port}`
+     检查客户端侧TCP端口连接是否工作：`nc {hostIP} {port}`
+   
+   * Windows 系统请使用 PowerShell 命令 Net-TestConnection -ComputerName {fqdn} -Port {port} 检测服务段端口是否访问
    
 10. 也可以使用taos程序内嵌的网络连通检测功能，来验证服务器和客户端之间指定的端口连接是否通畅（包括TCP和UDP）：[TDengine 内嵌网络检测工具使用指南](https://www.taosdata.com/blog/2020/09/08/1816.html)。
 
@@ -101,7 +105,20 @@ Connection = DriverManager.getConnection(url, properties);
   <version>2.0.4</version>
 </dependency>
 ```
-## 14. 怎么报告问题？
+## 14. taos connect failed, reason: invalid timestamp 
+
+常见原因是服务器和客户端时间没有校准，可以通过和时间服务器同步的方式（Linux 下使用 ntpdate 命令，Windows 在系统时间设置中选择自动同步）校准。
+
+
+
+## 15. 表名显示不全
+
+由于 taos shell 在终端中显示宽度有限，有可能比较长的表名显示不全，如果按照显示的不全的表名进行相关操作会发生 Table does not exist 错误。解决方法可以是通过修改 taos.cfg 文件中的设置项 maxBinaryDisplayWidth， 或者直接输入命令 set max_binary_display_width 100。或者在命令结尾使用 \G 参数来调整结果的显示方式。
+
+
+
+## 16. 怎么报告问题？
+
 如果 FAQ 中的信息不能够帮到您，需要 TDengine 技术团队的技术支持与协助，请将以下两个目录中内容打包:
 1. /var/log/taos
 2. /etc/taos 

packaging/cfg/taos.cfg

@@ -236,7 +236,7 @@
 # httpDebugFlag         131
 
 # debug flag for monitor
-# monitorDebugFlag      131
+# monDebugFlag          131
 
 # debug flag for query
 # qDebugflag            131
@@ -251,7 +251,7 @@
 # cqDebugFlag           131
 
 # enable/disable recording the SQL in taos client
-# tscEnableRecordSql    0
+# enableRecordSql    0
 
 # generate core file when service crash
 # enableCoreFile        1
@@ -260,4 +260,10 @@
 # maxBinaryDisplayWidth 30
 
 # enable/disable telemetry reporting
-# telemetryReporting    1
\ No newline at end of file
+# telemetryReporting    1
+
+# enable/disable stream (continuous query)
+# stream                1
+
+# only 50% CPU resources will be used in query processing
+# halfCoresForQuery     0

packaging/tools/install.sh

@@ -172,6 +172,7 @@ function install_bin() {
     ${csudo} rm -f ${bin_link_dir}/taos     || :
     ${csudo} rm -f ${bin_link_dir}/taosd    || :
     ${csudo} rm -f ${bin_link_dir}/taosdemo || :
+    ${csudo} rm -f ${bin_link_dir}/taosdump || :
     ${csudo} rm -f ${bin_link_dir}/rmtaos   || :
     ${csudo} rm -f ${bin_link_dir}/tarbitrator   || :
     ${csudo} rm -f ${bin_link_dir}/set_core   || :
@@ -182,6 +183,7 @@ function install_bin() {
     [ -x ${install_main_dir}/bin/taos ] && ${csudo} ln -s ${install_main_dir}/bin/taos ${bin_link_dir}/taos                      || :
     [ -x ${install_main_dir}/bin/taosd ] && ${csudo} ln -s ${install_main_dir}/bin/taosd ${bin_link_dir}/taosd                   || :
     [ -x ${install_main_dir}/bin/taosdemo ] && ${csudo} ln -s ${install_main_dir}/bin/taosdemo ${bin_link_dir}/taosdemo          || :
+    [ -x ${install_main_dir}/bin/taosdump ] && ${csudo} ln -s ${install_main_dir}/bin/taosdump ${bin_link_dir}/taosdump          || :
     [ -x ${install_main_dir}/bin/remove.sh ] && ${csudo} ln -s ${install_main_dir}/bin/remove.sh ${bin_link_dir}/rmtaos          || :
     [ -x ${install_main_dir}/bin/set_core.sh ] && ${csudo} ln -s ${install_main_dir}/bin/set_core.sh ${bin_link_dir}/set_core    || :
     [ -x ${install_main_dir}/bin/tarbitrator ] && ${csudo} ln -s ${install_main_dir}/bin/tarbitrator ${bin_link_dir}/tarbitrator || :

packaging/tools/install_client.sh

@@ -84,8 +84,9 @@ function install_main_path() {
 function install_bin() {
   # Remove links
   ${csudo} rm -f ${bin_link_dir}/taos         || :
-  if [ "$osType" == "Darwin" ]; then
+  if [ "$osType" != "Darwin" ]; then
       ${csudo} rm -f ${bin_link_dir}/taosdemo || :
+      ${csudo} rm -f ${bin_link_dir}/taosdump || :
   fi
   ${csudo} rm -f ${bin_link_dir}/rmtaos       || :
   ${csudo} rm -f ${bin_link_dir}/set_core     || :
@@ -94,8 +95,9 @@ function install_bin() {
 
   #Make link
   [ -x ${install_main_dir}/bin/taos ] && ${csudo} ln -s ${install_main_dir}/bin/taos ${bin_link_dir}/taos                 || :
-  if [ "$osType" == "Darwin" ]; then
+  if [ "$osType" != "Darwin" ]; then
       [ -x ${install_main_dir}/bin/taosdemo ] && ${csudo} ln -s ${install_main_dir}/bin/taosdemo ${bin_link_dir}/taosdemo || :
+      [ -x ${install_main_dir}/bin/taosdump ] && ${csudo} ln -s ${install_main_dir}/bin/taosdump ${bin_link_dir}/taosdump || :
   fi
   [ -x ${install_main_dir}/bin/remove_client.sh ] && ${csudo} ln -s ${install_main_dir}/bin/remove_client.sh ${bin_link_dir}/rmtaos || :
   [ -x ${install_main_dir}/bin/set_core.sh ] && ${csudo} ln -s ${install_main_dir}/bin/set_core.sh ${bin_link_dir}/set_core || :

packaging/tools/install_client_power.sh

@@ -84,8 +84,9 @@ function install_main_path() {
 function install_bin() {
   # Remove links
   ${csudo} rm -f ${bin_link_dir}/power         || :
-  if [ "$osType" == "Darwin" ]; then
+  if [ "$osType" != "Darwin" ]; then
       ${csudo} rm -f ${bin_link_dir}/powerdemo || :
+      ${csudo} rm -f ${bin_link_dir}/powerdump || :
   fi
   ${csudo} rm -f ${bin_link_dir}/rmpower       || :
   ${csudo} rm -f ${bin_link_dir}/set_core      || :
@@ -94,8 +95,9 @@ function install_bin() {
 
   #Make link
   [ -x ${install_main_dir}/bin/power ] && ${csudo} ln -s ${install_main_dir}/bin/power ${bin_link_dir}/power                 || :
-  if [ "$osType" == "Darwin" ]; then
+  if [ "$osType" != "Darwin" ]; then
       [ -x ${install_main_dir}/bin/powerdemo ] && ${csudo} ln -s ${install_main_dir}/bin/powerdemo ${bin_link_dir}/powerdemo || :
+      [ -x ${install_main_dir}/bin/powerdump ] && ${csudo} ln -s ${install_main_dir}/bin/powerdump ${bin_link_dir}/powerdump || :
   fi
   [ -x ${install_main_dir}/bin/remove_client_power.sh ] && ${csudo} ln -s ${install_main_dir}/bin/remove_client_power.sh ${bin_link_dir}/rmpower || :
   [ -x ${install_main_dir}/bin/set_core.sh ] && ${csudo} ln -s ${install_main_dir}/bin/set_core.sh ${bin_link_dir}/set_core || :

packaging/tools/install_power.sh

@@ -172,6 +172,7 @@ function install_bin() {
     ${csudo} rm -f ${bin_link_dir}/power     || :
     ${csudo} rm -f ${bin_link_dir}/powerd    || :
     ${csudo} rm -f ${bin_link_dir}/powerdemo || :
+    ${csudo} rm -f ${bin_link_dir}/powerdump || :
     ${csudo} rm -f ${bin_link_dir}/rmpower   || :
     ${csudo} rm -f ${bin_link_dir}/tarbitrator   || :
     ${csudo} rm -f ${bin_link_dir}/set_core   || :
@@ -182,6 +183,7 @@ function install_bin() {
     [ -x ${install_main_dir}/bin/power ] && ${csudo} ln -s ${install_main_dir}/bin/power ${bin_link_dir}/power                        || :
     [ -x ${install_main_dir}/bin/powerd ] && ${csudo} ln -s ${install_main_dir}/bin/powerd ${bin_link_dir}/powerd                     || :
     [ -x ${install_main_dir}/bin/powerdemo ] && ${csudo} ln -s ${install_main_dir}/bin/powerdemo ${bin_link_dir}/powerdemo            || :
+    [ -x ${install_main_dir}/bin/powerdump ] && ${csudo} ln -s ${install_main_dir}/bin/powerdump ${bin_link_dir}/powerdump            || :
     [ -x ${install_main_dir}/bin/remove_power.sh ] && ${csudo} ln -s ${install_main_dir}/bin/remove_power.sh ${bin_link_dir}/rmpower  || :
     [ -x ${install_main_dir}/bin/set_core.sh ] && ${csudo} ln -s ${install_main_dir}/bin/set_core.sh ${bin_link_dir}/set_core         || :
     [ -x ${install_main_dir}/bin/tarbitrator ] && ${csudo} ln -s ${install_main_dir}/bin/tarbitrator ${bin_link_dir}/tarbitrator      || :

packaging/tools/post.sh

@@ -92,6 +92,7 @@ function install_bin() {
     ${csudo} rm -f ${bin_link_dir}/taos     || :
     ${csudo} rm -f ${bin_link_dir}/taosd    || :
     ${csudo} rm -f ${bin_link_dir}/taosdemo || :
+    ${csudo} rm -f ${bin_link_dir}/taosdump || :
     ${csudo} rm -f ${bin_link_dir}/rmtaos   || :
     ${csudo} rm -f ${bin_link_dir}/set_core || :
 
@@ -101,6 +102,7 @@ function install_bin() {
     [ -x ${bin_dir}/taos ] && ${csudo} ln -s ${bin_dir}/taos ${bin_link_dir}/taos             || :
     [ -x ${bin_dir}/taosd ] && ${csudo} ln -s ${bin_dir}/taosd ${bin_link_dir}/taosd          || :
     [ -x ${bin_dir}/taosdemo ] && ${csudo} ln -s ${bin_dir}/taosdemo ${bin_link_dir}/taosdemo || :
+    [ -x ${bin_dir}/taosdump ] && ${csudo} ln -s ${bin_dir}/taosdump ${bin_link_dir}/taosdump || :
     [ -x ${bin_dir}/set_core.sh ] && ${csudo} ln -s ${bin_dir}/set_core.sh ${bin_link_dir}/set_core || :
 }
 

packaging/tools/remove.sh

@@ -72,6 +72,7 @@ function clean_bin() {
     ${csudo} rm -f ${bin_link_dir}/taos        || :
     ${csudo} rm -f ${bin_link_dir}/taosd       || :
     ${csudo} rm -f ${bin_link_dir}/taosdemo    || :
+    ${csudo} rm -f ${bin_link_dir}/taosdump    || :
     ${csudo} rm -f ${bin_link_dir}/rmtaos      || :
     ${csudo} rm -f ${bin_link_dir}/tarbitrator || :
     ${csudo} rm -f ${bin_link_dir}/set_core    || :
@@ -222,4 +223,4 @@ elif  echo $osinfo | grep -qwi "centos" ; then
 fi
 
 echo -e "${GREEN}TDengine is removed successfully!${NC}"
-echo 
\ No newline at end of file
+echo 

packaging/tools/remove_client.sh

@@ -38,6 +38,7 @@ function clean_bin() {
     # Remove link
     ${csudo} rm -f ${bin_link_dir}/taos      || :
     ${csudo} rm -f ${bin_link_dir}/taosdemo  || :
+    ${csudo} rm -f ${bin_link_dir}/taosdump  || :
     ${csudo} rm -f ${bin_link_dir}/rmtaos    || :
     ${csudo} rm -f ${bin_link_dir}/set_core  || :
 }

packaging/tools/remove_client_power.sh

@@ -38,6 +38,7 @@ function clean_bin() {
     # Remove link
     ${csudo} rm -f ${bin_link_dir}/power      || :
     ${csudo} rm -f ${bin_link_dir}/powerdemo  || :
+    ${csudo} rm -f ${bin_link_dir}/powerdump  || :
     ${csudo} rm -f ${bin_link_dir}/rmpower    || :
     ${csudo} rm -f ${bin_link_dir}/set_core   || :
 }

packaging/tools/remove_power.sh

@@ -72,6 +72,7 @@ function clean_bin() {
     ${csudo} rm -f ${bin_link_dir}/power        || :
     ${csudo} rm -f ${bin_link_dir}/powerd       || :
     ${csudo} rm -f ${bin_link_dir}/powerdemo    || :
+    ${csudo} rm -f ${bin_link_dir}/powerdump    || :
     ${csudo} rm -f ${bin_link_dir}/rmpower      || :
     ${csudo} rm -f ${bin_link_dir}/tarbitrator  || :
     ${csudo} rm -f ${bin_link_dir}/set_core     || :
@@ -223,4 +224,4 @@ fi
 #fi
 
 echo -e "${GREEN}PowerDB is removed successfully!${NC}"
-echo 
\ No newline at end of file
+echo 

snap/snapcraft.yaml

 name: tdengine
 base: core18
-version: '2.0.8.0'
+version: '2.0.9.0'
 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.2.0.8.0
+      - usr/lib/libtaos.so.2.0.9.0
       - usr/lib/libtaos.so.1
       - usr/lib/libtaos.so
 

src/CMakeLists.txt

@@ -10,9 +10,7 @@ ADD_SUBDIRECTORY(client)
 ADD_SUBDIRECTORY(query)
 ADD_SUBDIRECTORY(kit)
 ADD_SUBDIRECTORY(plugins)
-IF (TD_SYNC)
-  ADD_SUBDIRECTORY(sync)
-ENDIF ()
+ADD_SUBDIRECTORY(sync)
 ADD_SUBDIRECTORY(balance)
 ADD_SUBDIRECTORY(mnode)
 ADD_SUBDIRECTORY(vnode)

src/balance/inc/bnInt.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_BALANCE_INT_H
+#define TDENGINE_BALANCE_INT_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+#include "mnodeInt.h"
+#include "mnodeDef.h"
+#include "mnodeDnode.h"
+
+typedef struct {
+  int32_t     size;
+  int32_t     maxSize;
+  SDnodeObj **list;
+} SBnDnodes;
+
+typedef struct {
+  void *          timer;
+  bool            stop;
+  pthread_mutex_t mutex;
+  pthread_cond_t  cond;
+  pthread_t       thread;
+} SBnThread;
+
+typedef struct {
+  pthread_mutex_t mutex;
+} SBnMgmt;
+
+int32_t bnInit();
+void    bnCleanUp();
+bool    bnStart();
+void    bnCheckStatus();
+void    bnCheckModules();
+
+extern SBnDnodes tsBnDnodes;
+extern void *tsMnodeTmr;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

src/balance/inc/bnScore.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_BALANCE_SCORE_H
+#define TDENGINE_BALANCE_SCORE_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+#include "bnInt.h"
+
+void  bnInitDnodes();
+void  bnCleanupDnodes();
+void  bnAccquireDnodes();
+void  bnReleaseDnodes();
+float bnTryCalcDnodeScore(SDnodeObj *pDnode, int32_t extraVnode);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

src/balance/inc/bnThread.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_BALANCE_THREAD_H
+#define TDENGINE_BALANCE_THREAD_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+#include "bnInt.h"
+
+int32_t bnInitThread();
+void    bnCleanupThread();
+void    bnNotify();
+void    bnStartTimer(int64_t mseconds);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

src/balance/src/bnScore.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 "tglobal.h"
+#include "mnodeShow.h"
+#include "mnodeUser.h"
+#include "bnScore.h"
+
+SBnDnodes tsBnDnodes;
+
+static int32_t bnGetScoresMeta(STableMetaMsg *pMeta, SShowObj *pShow, void *pConn);
+static int32_t bnRetrieveScores(SShowObj *pShow, char *data, int32_t rows, void *pConn);
+
+static int32_t bnCalcCpuScore(SDnodeObj *pDnode) {
+  if (pDnode->cpuAvgUsage < 80)
+    return 0;
+  else if (pDnode->cpuAvgUsage < 90)
+    return 10;
+  else
+    return 50;
+}
+
+static int32_t bnCalcMemoryScore(SDnodeObj *pDnode) {
+  if (pDnode->memoryAvgUsage < 80)
+    return 0;
+  else if (pDnode->memoryAvgUsage < 90)
+    return 10;
+  else
+    return 50;
+}
+
+static int32_t bnCalcDiskScore(SDnodeObj *pDnode) {
+  if (pDnode->diskAvgUsage < 80)
+    return 0;
+  else if (pDnode->diskAvgUsage < 90)
+    return 10;
+  else
+    return 50;
+}
+
+static int32_t bnCalcBandScore(SDnodeObj *pDnode) {
+  if (pDnode->bandwidthUsage < 30)
+    return 0;
+  else if (pDnode->bandwidthUsage < 80)
+    return 10;
+  else
+    return 50;
+}
+
+static float bnCalcModuleScore(SDnodeObj *pDnode) {
+  if (pDnode->numOfCores <= 0) return 0;
+  if (pDnode->isMgmt) {
+    return (float)tsMnodeEqualVnodeNum / pDnode->numOfCores;
+  }
+  return 0;
+}
+
+static float bnCalcVnodeScore(SDnodeObj *pDnode, int32_t extra) {
+  if (pDnode->status == TAOS_DN_STATUS_DROPPING || pDnode->status == TAOS_DN_STATUS_OFFLINE) return 100000000;
+  if (pDnode->numOfCores <= 0) return 0;
+  return (float)(pDnode->openVnodes + extra) / pDnode->numOfCores;
+}
+
+/**
+ * calc singe score, such as cpu/memory/disk/bandwitdh/vnode
+ * 1. get the score config
+ * 2. if the value is out of range, use border data
+ * 3. otherwise use interpolation method
+ **/
+static void bnCalcDnodeScore(SDnodeObj *pDnode) {
+  pDnode->score = bnCalcCpuScore(pDnode) + bnCalcMemoryScore(pDnode) + bnCalcDiskScore(pDnode) +
+                  bnCalcBandScore(pDnode) + bnCalcModuleScore(pDnode) + bnCalcVnodeScore(pDnode, 0) +
+                  pDnode->customScore;
+}
+
+float bnTryCalcDnodeScore(SDnodeObj *pDnode, int32_t extra) {
+  int32_t systemScore = bnCalcCpuScore(pDnode) + bnCalcMemoryScore(pDnode) + bnCalcDiskScore(pDnode) +
+                        bnCalcBandScore(pDnode);
+  float moduleScore = bnCalcModuleScore(pDnode);
+  float vnodeScore = bnCalcVnodeScore(pDnode, extra);
+
+  float score = systemScore + moduleScore + vnodeScore +  pDnode->customScore;
+  return score;
+}
+
+void bnInitDnodes() {
+  mnodeAddShowMetaHandle(TSDB_MGMT_TABLE_SCORES, bnGetScoresMeta);
+  mnodeAddShowRetrieveHandle(TSDB_MGMT_TABLE_SCORES, bnRetrieveScores);
+  mnodeAddShowFreeIterHandle(TSDB_MGMT_TABLE_SCORES, mnodeCancelGetNextDnode);
+
+  memset(&tsBnDnodes, 0, sizeof(SBnDnodes));
+  tsBnDnodes.maxSize = 16;
+  tsBnDnodes.list = calloc(tsBnDnodes.maxSize, sizeof(SDnodeObj *));
+}
+
+void bnCleanupDnodes() {
+  if (tsBnDnodes.list != NULL) {
+    free(tsBnDnodes.list);
+    tsBnDnodes.list = NULL;
+  }
+}
+
+static void bnCheckDnodesSize(int32_t dnodesNum) {
+  if (tsBnDnodes.maxSize <= dnodesNum) {
+    tsBnDnodes.maxSize = dnodesNum * 2;
+    tsBnDnodes.list = realloc(tsBnDnodes.list, tsBnDnodes.maxSize * sizeof(SDnodeObj *));
+  }
+}
+
+void bnAccquireDnodes() {
+  int32_t dnodesNum = mnodeGetDnodesNum();
+  bnCheckDnodesSize(dnodesNum);
+
+  void *     pIter = NULL;
+  SDnodeObj *pDnode = NULL;
+  int32_t    dnodeIndex = 0;
+
+  while (1) {
+    if (dnodeIndex >= dnodesNum) {
+      mnodeCancelGetNextDnode(pIter);
+      break;
+    }
+
+    pIter = mnodeGetNextDnode(pIter, &pDnode);
+    if (pDnode == NULL) break;
+    if (pDnode->status == TAOS_DN_STATUS_OFFLINE) {
+      mnodeDecDnodeRef(pDnode);
+      continue;
+    }
+
+    bnCalcDnodeScore(pDnode);
+    
+    int32_t orderIndex = dnodeIndex;
+    for (; orderIndex > 0; --orderIndex) {
+      if (pDnode->score > tsBnDnodes.list[orderIndex - 1]->score) {
+        break;
+      }
+      tsBnDnodes.list[orderIndex] = tsBnDnodes.list[orderIndex - 1];
+    }
+    tsBnDnodes.list[orderIndex] = pDnode;
+    dnodeIndex++;
+  }
+
+  tsBnDnodes.size = dnodeIndex;
+}
+
+void bnReleaseDnodes() {
+  for (int32_t i = 0; i < tsBnDnodes.size; ++i) {
+    SDnodeObj *pDnode = tsBnDnodes.list[i];
+    if (pDnode != NULL) {
+      mnodeDecDnodeRef(pDnode);
+    }
+  }
+}
+
+static int32_t bnGetScoresMeta(STableMetaMsg *pMeta, SShowObj *pShow, void *pConn) {
+  SUserObj *pUser = mnodeGetUserFromConn(pConn);
+  if (pUser == NULL) return 0;
+
+  if (strcmp(pUser->pAcct->user, "root") != 0) {
+    mnodeDecUserRef(pUser);
+    return TSDB_CODE_MND_NO_RIGHTS;
+  }
+
+  int32_t  cols = 0;
+  SSchema *pSchema = pMeta->schema;
+
+  pShow->bytes[cols] = 2;
+  pSchema[cols].type = TSDB_DATA_TYPE_SMALLINT;
+  strcpy(pSchema[cols].name, "id");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 4;
+  pSchema[cols].type = TSDB_DATA_TYPE_FLOAT;
+  strcpy(pSchema[cols].name, "system scores");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 4;
+  pSchema[cols].type = TSDB_DATA_TYPE_FLOAT;
+  strcpy(pSchema[cols].name, "custom scores");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 4;
+  pSchema[cols].type = TSDB_DATA_TYPE_FLOAT;
+  strcpy(pSchema[cols].name, "module scores");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 4;
+  pSchema[cols].type = TSDB_DATA_TYPE_FLOAT;
+  strcpy(pSchema[cols].name, "vnode scores");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 4;
+  pSchema[cols].type = TSDB_DATA_TYPE_FLOAT;
+  strcpy(pSchema[cols].name, "total scores");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 4;
+  pSchema[cols].type = TSDB_DATA_TYPE_INT;
+  strcpy(pSchema[cols].name, "open vnodes");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 4;
+  pSchema[cols].type = TSDB_DATA_TYPE_INT;
+  strcpy(pSchema[cols].name, "cpu cores");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 18 + VARSTR_HEADER_SIZE;
+  pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
+  strcpy(pSchema[cols].name, "balance state");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pMeta->numOfColumns = htons(cols);
+  pShow->numOfColumns = cols;
+
+  pShow->offset[0] = 0;
+  for (int32_t i = 1; i < cols; ++i) {
+    pShow->offset[i] = pShow->offset[i - 1] + pShow->bytes[i - 1];
+  }
+
+  pShow->numOfRows = mnodeGetDnodesNum();
+  pShow->rowSize = pShow->offset[cols - 1] + pShow->bytes[cols - 1];
+  pShow->pIter = NULL;
+
+  mnodeDecUserRef(pUser);
+
+  return 0;
+}
+
+static int32_t bnRetrieveScores(SShowObj *pShow, char *data, int32_t rows, void *pConn) {
+  int32_t    numOfRows = 0;
+  SDnodeObj *pDnode = NULL;
+  char *     pWrite;
+  int32_t    cols = 0;
+
+  while (numOfRows < rows) {
+    pShow->pIter = mnodeGetNextDnode(pShow->pIter, &pDnode);
+    if (pDnode == NULL) break;
+
+    int32_t systemScore = bnCalcCpuScore(pDnode) + bnCalcMemoryScore(pDnode) + bnCalcDiskScore(pDnode) + bnCalcBandScore(pDnode);
+    float moduleScore = bnCalcModuleScore(pDnode);
+    float vnodeScore = bnCalcVnodeScore(pDnode, 0);
+
+    cols = 0;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int16_t *)pWrite = pDnode->dnodeId;
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(float *)pWrite = systemScore;
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(float *)pWrite = pDnode->customScore;
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(float *)pWrite = (int32_t)moduleScore;
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(float *)pWrite = (int32_t)vnodeScore;
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(float *)pWrite = (int32_t)(vnodeScore + moduleScore + pDnode->customScore + systemScore);
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int32_t *)pWrite = pDnode->openVnodes;
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int32_t *)pWrite = pDnode->numOfCores;
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    STR_TO_VARSTR(pWrite, mnodeGetDnodeStatusStr(pDnode->status));
+    cols++;
+
+    numOfRows++;
+    mnodeDecDnodeRef(pDnode);
+  }
+
+  mnodeVacuumResult(data, pShow->numOfColumns, numOfRows, rows, pShow);
+  pShow->numOfReads += numOfRows;
+  return numOfRows;
+}

src/balance/src/bnThread.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 "ttimer.h"
+#include "tglobal.h"
+#include "mnodeSdb.h"
+#include "bnThread.h"
+
+static SBnThread tsBnThread;
+
+static void *bnThreadFunc(void *arg) {
+  while (1) {
+    pthread_mutex_lock(&tsBnThread.mutex);
+    if (tsBnThread.stop) {
+      pthread_mutex_unlock(&tsBnThread.mutex);
+      break;
+    }
+
+    pthread_cond_wait(&tsBnThread.cond, &tsBnThread.mutex);
+    bool updateSoon = bnStart();
+    bnStartTimer(updateSoon ? 1000 : -1);
+    pthread_mutex_unlock(&(tsBnThread.mutex));
+  }
+
+  mDebug("balance thread is stopped");
+  return NULL;
+}
+
+int32_t bnInitThread() {
+  memset(&tsBnThread, 0, sizeof(SBnThread));
+  tsBnThread.stop = false;
+  pthread_mutex_init(&tsBnThread.mutex, NULL);
+  pthread_cond_init(&tsBnThread.cond, NULL);
+
+  pthread_attr_t thattr;
+  pthread_attr_init(&thattr);
+  pthread_attr_setdetachstate(&thattr, PTHREAD_CREATE_JOINABLE);
+  int32_t ret = pthread_create(&tsBnThread.thread, &thattr, bnThreadFunc, NULL);
+  pthread_attr_destroy(&thattr);
+
+  if (ret != 0) {
+    mError("failed to create balance thread since %s", strerror(errno));
+    return -1;
+  }
+
+  bnStartTimer(2000);
+  mDebug("balance thread is created");
+  return 0;
+}
+
+void bnCleanupThread() {
+  mDebug("balance thread will be cleanup");
+
+  if (tsBnThread.timer != NULL) {
+    taosTmrStopA(&tsBnThread.timer);
+    tsBnThread.timer = NULL;
+    mDebug("stop balance timer");
+  }
+
+  pthread_mutex_lock(&tsBnThread.mutex);
+  tsBnThread.stop = true;
+  pthread_cond_signal(&tsBnThread.cond);
+  pthread_mutex_unlock(&(tsBnThread.mutex));
+  pthread_join(tsBnThread.thread, NULL);
+
+  pthread_cond_destroy(&tsBnThread.cond);
+  pthread_mutex_destroy(&tsBnThread.mutex);
+}
+
+static void bnPostSignal() {
+  if (tsBnThread.stop) return;
+
+  pthread_mutex_lock(&tsBnThread.mutex);
+  pthread_cond_signal(&tsBnThread.cond);
+  pthread_mutex_unlock(&(tsBnThread.mutex));
+}
+
+/*
+ * once sdb work as mater, then tsAccessSquence reset to zero
+ * increase tsAccessSquence every balance interval
+ */
+
+static void bnProcessTimer(void *handle, void *tmrId) {
+  if (!sdbIsMaster()) return;
+  if (tsBnThread.stop) return;
+
+  tsBnThread.timer = NULL;
+  tsAccessSquence++;
+
+  bnCheckStatus();
+  bnStartTimer(-1);
+
+  if (handle == NULL) {
+    if (tsAccessSquence % tsBalanceInterval == 0) {
+      mDebug("balance function is scheduled by timer");
+      bnPostSignal();
+    }
+  } else {
+    int64_t mseconds = (int64_t)handle;
+    mDebug("balance function is scheduled by event for %" PRId64 " mseconds arrived", mseconds);
+    bnPostSignal();
+  }
+}
+
+void bnStartTimer(int64_t mseconds) {
+  if (tsBnThread.stop) return;
+
+  bool updateSoon = (mseconds != -1);
+  if (updateSoon) {
+    taosTmrReset(bnProcessTimer, mseconds, (void *)mseconds, tsMnodeTmr, &tsBnThread.timer);
+  } else {
+    taosTmrReset(bnProcessTimer, tsStatusInterval * 1000, NULL, tsMnodeTmr, &tsBnThread.timer);
+  }
+}
+
+void bnNotify() {
+  bnStartTimer(500); 
+}

src/client/inc/tscLocalMerge.h

@@ -56,7 +56,6 @@ typedef struct SLocalReducer {
   tFilePage *            pTempBuffer;
   struct SQLFunctionCtx *pCtx;
   int32_t                rowSize;      // size of each intermediate result.
-  int32_t                finalRowSize; // final result row size
   int32_t                status;       // denote it is in reduce process, in reduce process, it
   bool                   hasPrevRow;   // cannot be released
   bool                   hasUnprocessedRow;

src/client/inc/tscUtil.h

@@ -92,7 +92,7 @@ typedef struct SVgroupTableInfo {
 } SVgroupTableInfo;
 
 static FORCE_INLINE SQueryInfo* tscGetQueryInfoDetail(SSqlCmd* pCmd, int32_t subClauseIndex) {
-  assert(pCmd != NULL && subClauseIndex >= 0 && subClauseIndex < TSDB_MAX_UNION_CLAUSE);
+  assert(pCmd != NULL && subClauseIndex >= 0);
 
   if (pCmd->pQueryInfo == NULL || subClauseIndex >= pCmd->numOfClause) {
     return NULL;
@@ -278,7 +278,7 @@ bool hasMoreClauseToTry(SSqlObj* pSql);
 void tscTryQueryNextVnode(SSqlObj *pSql, __async_cb_func_t fp);
 void tscAsyncQuerySingleRowForNextVnode(void *param, TAOS_RES *tres, int numOfRows);
 void tscTryQueryNextClause(SSqlObj* pSql, __async_cb_func_t fp);
-int  tscSetMgmtEpSetFromCfg(const char *first, const char *second);
+int  tscSetMgmtEpSetFromCfg(const char *first, const char *second, SRpcCorEpSet *corEpSet);
 
 bool tscSetSqlOwner(SSqlObj* pSql);
 void tscClearSqlOwner(SSqlObj* pSql);

src/client/inc/tsclient.h

@@ -246,11 +246,14 @@ typedef struct SQueryInfo {
   int16_t          fillType;      // final result fill type
   int16_t          numOfTables;
   STableMetaInfo **pTableMetaInfo;
-  struct STSBuf *  tsBuf;
+  struct STSBuf   *tsBuf;
   int64_t *        fillVal;       // default value for fill
   char *           msg;           // pointer to the pCmd->payload to keep error message temporarily
   int64_t          clauseLimit;   // limit for current sub clause
+
   int64_t          prjOffset;     // offset value in the original sql expression, only applied at client side
+  int64_t          tableLimit;    // table limit in case of super table projection query + global order + limit
+
   int32_t          udColumnId;    // current user-defined constant output field column id, monotonically decreases from TSDB_UD_COLUMN_INDEX
   int16_t          resColumnId;   // result column id
 } SQueryInfo;
@@ -282,7 +285,7 @@ typedef struct {
 
   int8_t       dataSourceType;     // load data from file or not
   int8_t       submitSchema; // submit block is built with table schema
-  STagData     tagData;
+  STagData    *pTagData;     // NOTE: pTagData->data is used as a variant length array
   SHashObj    *pTableList;   // referred table involved in sql
   SArray      *pDataBlocks;  // SArray<STableDataBlocks*> submit data blocks after parsing sql
 } SSqlCmd;
@@ -333,9 +336,10 @@ typedef struct STscObj {
   char               superAuth : 1;
   uint32_t           connId;
   uint64_t           rid;      // ref ID returned by taosAddRef
-  struct SSqlObj *   pHb;
+  int64_t            hbrid;
   struct SSqlObj *   sqlList;
   struct SSqlStream *streamList;
+  SRpcCorEpSet       *tscCorMgmtEpSet;
   void*              pDnodeConn;
   pthread_mutex_t    mutex;
   T_REF_DECLARE()
@@ -373,7 +377,7 @@ typedef struct SSqlObj {
   struct SSqlObj **pSubs;
 
   struct SSqlObj  *prev, *next;
-  struct SSqlObj **self;
+  int64_t          self;
 } SSqlObj;
 
 typedef struct SSqlStream {
@@ -507,7 +511,7 @@ static FORCE_INLINE void tscGetResultColumnChr(SSqlRes* pRes, SFieldInfo* pField
 }
 
 extern SCacheObj*    tscMetaCache;
-extern SCacheObj*    tscObjCache;
+extern int           tscObjRef;
 extern void *    tscTmr;
 extern void *    tscQhandle;
 extern int       tscKeepConn[];
@@ -515,7 +519,6 @@ extern int       tsInsertHeadSize;
 extern int       tscNumOfThreads;
 extern int       tscRefId;
   
-extern SRpcCorEpSet tscMgmtEpSet;
 
 extern int (*tscBuildMsg[TSDB_SQL_MAX])(SSqlObj *pSql, SSqlInfo *pInfo);
 

src/client/src/tscLocal.c

@@ -825,8 +825,11 @@ static int32_t tscProcessClientVer(SSqlObj *pSql) {
 static int32_t tscProcessServStatus(SSqlObj *pSql) {
   STscObj* pObj = pSql->pTscObj;
 
-  if (pObj->pHb != NULL) {
-    if (pObj->pHb->res.code == TSDB_CODE_RPC_NETWORK_UNAVAIL) {
+  SSqlObj* pHb = (SSqlObj*)taosAcquireRef(tscObjRef, pObj->hbrid);
+  if (pHb != NULL) {
+    int32_t code = pHb->res.code;
+    taosReleaseRef(tscObjRef, pObj->hbrid);
+    if (code == TSDB_CODE_RPC_NETWORK_UNAVAIL) {
       pSql->res.code = TSDB_CODE_RPC_NETWORK_UNAVAIL;
       return pSql->res.code;
     }

src/client/src/tscLocalMerge.c

@@ -198,6 +198,7 @@ void tscCreateLocalReducer(tExtMemBuffer **pMemBuffer, int32_t numOfBuffer, tOrd
 
   if (numOfFlush == 0 || numOfBuffer == 0) {
     tscLocalReducerEnvDestroy(pMemBuffer, pDesc, finalmodel, pFFModel, numOfBuffer);
+    pCmd->command = TSDB_SQL_RETRIEVE_EMPTY_RESULT; // no result, set the result empty
     tscDebug("%p retrieved no data", pSql);
     return;
   }
@@ -330,22 +331,19 @@ void tscCreateLocalReducer(tExtMemBuffer **pMemBuffer, int32_t numOfBuffer, tOrd
   pReducer->nResultBufSize = pMemBuffer[0]->pageSize * 16;
   pReducer->pResultBuf = (tFilePage *)calloc(1, pReducer->nResultBufSize + sizeof(tFilePage));
 
-  pReducer->finalRowSize = tscGetResRowLength(pQueryInfo->exprList);
   pReducer->resColModel = finalmodel;
   pReducer->resColModel->capacity = pReducer->nResultBufSize;
-
   pReducer->finalModel = pFFModel;
 
-  assert(pReducer->finalRowSize > 0);
-  if (pReducer->finalRowSize > 0) {
-    pReducer->resColModel->capacity /= pReducer->finalRowSize;
+  if (finalmodel->rowSize > 0) {
+    pReducer->resColModel->capacity /= finalmodel->rowSize;
   }
-  assert(pReducer->finalRowSize <= pReducer->rowSize);
 
+  assert(finalmodel->rowSize > 0 && finalmodel->rowSize <= pReducer->rowSize);
   pReducer->pFinalRes = calloc(1, pReducer->rowSize * pReducer->resColModel->capacity);
 
   if (pReducer->pTempBuffer == NULL || pReducer->discardData == NULL || pReducer->pResultBuf == NULL ||
-      /*pReducer->pBufForInterpo == NULL || */pReducer->pFinalRes == NULL || pReducer->prevRowOfInput == NULL) {
+      pReducer->pFinalRes == NULL || pReducer->prevRowOfInput == NULL) {
     tfree(pReducer->pTempBuffer);
     tfree(pReducer->discardData);
     tfree(pReducer->pResultBuf);
@@ -723,10 +721,16 @@ int32_t tscLocalReducerEnvCreate(SSqlObj *pSql, tExtMemBuffer ***pMemBuffer, tOr
 
   // final result depends on the fields number
   memset(pSchema, 0, sizeof(SSchema) * size);
+
   for (int32_t i = 0; i < size; ++i) {
     SSqlExpr *pExpr = tscSqlExprGet(pQueryInfo, i);
 
-    SSchema *p1 = tscGetTableColumnSchema(pTableMetaInfo->pTableMeta, pExpr->colInfo.colIndex);
+    SSchema p1 = {0};
+    if (pExpr->colInfo.colIndex != TSDB_TBNAME_COLUMN_INDEX) {
+      p1 = *tscGetTableColumnSchema(pTableMetaInfo->pTableMeta, pExpr->colInfo.colIndex);
+    } else {
+      p1 = tGetTableNameColumnSchema();
+    }
 
     int32_t inter = 0;
     int16_t type = -1;
@@ -745,7 +749,8 @@ int32_t tscLocalReducerEnvCreate(SSqlObj *pSql, tExtMemBuffer ***pMemBuffer, tOr
         functionId = TSDB_FUNC_LAST;
       }
 
-      getResultDataInfo(p1->type, p1->bytes, functionId, 0, &type, &bytes, &inter, 0, false);
+      int32_t ret = getResultDataInfo(p1.type, p1.bytes, functionId, 0, &type, &bytes, &inter, 0, false);
+      assert(ret == TSDB_CODE_SUCCESS);
     }
 
     pSchema[i].type = (uint8_t)type;
@@ -920,7 +925,7 @@ static void genFinalResWithoutFill(SSqlRes* pRes, SLocalReducer *pLocalReducer,
     savePrevRecordAndSetupFillInfo(pLocalReducer, pQueryInfo, pLocalReducer->pFillInfo);
   }
 
-  memcpy(pRes->data, pBeforeFillData->data, (size_t)(pRes->numOfRows * pLocalReducer->finalRowSize));
+  memcpy(pRes->data, pBeforeFillData->data, (size_t)(pRes->numOfRows * pLocalReducer->finalModel->rowSize));
 
   pRes->numOfClauseTotal += pRes->numOfRows;
   pBeforeFillData->num = 0;
@@ -1256,7 +1261,7 @@ bool genFinalResults(SSqlObj *pSql, SLocalReducer *pLocalReducer, bool noMoreCur
   tColModelCompact(pModel, pResBuf, pModel->capacity);
 
   if (tscIsSecondStageQuery(pQueryInfo)) {
-    pLocalReducer->finalRowSize = doArithmeticCalculate(pQueryInfo, pResBuf, pModel->rowSize, pLocalReducer->finalRowSize);
+    doArithmeticCalculate(pQueryInfo, pResBuf, pModel->rowSize, pLocalReducer->finalModel->rowSize);
   }
 
 #ifdef _DEBUG_VIEW
@@ -1627,7 +1632,8 @@ void tscInitResObjForLocalQuery(SSqlObj *pObj, int32_t numOfRes, int32_t rowLen)
 }
 
 int32_t doArithmeticCalculate(SQueryInfo* pQueryInfo, tFilePage* pOutput, int32_t rowSize, int32_t finalRowSize) {
-  char* pbuf = calloc(1, pOutput->num * rowSize);
+  int32_t maxRowSize = MAX(rowSize, finalRowSize);
+  char* pbuf = calloc(1, (size_t)(pOutput->num * maxRowSize));
 
   size_t size = tscNumOfFields(pQueryInfo);
   SArithmeticSupport arithSup = {0};
@@ -1654,17 +1660,16 @@ int32_t doArithmeticCalculate(SQueryInfo* pQueryInfo, tFilePage* pOutput, int32_
       tExprTreeCalcTraverse(arithSup.pArithExpr->pExpr, (int32_t) pOutput->num, pbuf + pOutput->num*offset, &arithSup, TSDB_ORDER_ASC, getArithmeticInputSrc);
     } else {
       SSqlExpr* pExpr = pSup->pSqlExpr;
-      memcpy(pbuf + pOutput->num * offset, pExpr->offset * pOutput->num + pOutput->data, pExpr->resBytes * pOutput->num);
+      memcpy(pbuf + pOutput->num * offset, pExpr->offset * pOutput->num + pOutput->data, (size_t)(pExpr->resBytes * pOutput->num));
     }
 
     offset += pSup->field.bytes;
   }
 
-  assert(finalRowSize <= rowSize);
-  memcpy(pOutput->data, pbuf, pOutput->num * offset);
+  memcpy(pOutput->data, pbuf, (size_t)(pOutput->num * offset));
 
   tfree(pbuf);
   tfree(arithSup.data);
 
   return offset;
-}
\ No newline at end of file
+}

src/client/src/tscParseInsert.c

@@ -630,11 +630,17 @@ int32_t tscAllocateMemIfNeed(STableDataBlocks *pDataBlock, int32_t rowSize, int3
   return TSDB_CODE_SUCCESS;
 }
 
-static void tsSetBlockInfo(SSubmitBlk *pBlocks, const STableMeta *pTableMeta, int32_t numOfRows) {
+static int32_t tsSetBlockInfo(SSubmitBlk *pBlocks, const STableMeta *pTableMeta, int32_t numOfRows) {
   pBlocks->tid = pTableMeta->id.tid;
   pBlocks->uid = pTableMeta->id.uid;
   pBlocks->sversion = pTableMeta->sversion;
-  pBlocks->numOfRows += numOfRows;
+
+  if (pBlocks->numOfRows + numOfRows >= INT16_MAX) {
+    return TSDB_CODE_TSC_INVALID_SQL;
+  } else {
+    pBlocks->numOfRows += numOfRows;
+    return TSDB_CODE_SUCCESS;
+  }
 }
 
 // data block is disordered, sort it in ascending order
@@ -722,7 +728,11 @@ static int32_t doParseInsertStatement(SSqlObj *pSql, void *pTableList, char **st
   }
 
   SSubmitBlk *pBlocks = (SSubmitBlk *)(dataBuf->pData);
-  tsSetBlockInfo(pBlocks, pTableMeta, numOfRows);
+  code = tsSetBlockInfo(pBlocks, pTableMeta, numOfRows);
+  if (code != TSDB_CODE_SUCCESS) {
+    tscInvalidSQLErrMsg(pCmd->payload, "too many rows in sql, total number of rows should be less than 32767", *str);
+    return code;
+  }
 
   dataBuf->vgId = pTableMeta->vgroupInfo.vgId;
   dataBuf->numOfTables = 1;
@@ -790,9 +800,6 @@ static int32_t tscCheckIfCreateTable(char **sqlstr, SSqlObj *pSql) {
     sql += index;
 
     tscAllocPayload(pCmd, sizeof(STagData));
-    STagData *pTag = &pCmd->tagData;
-
-    memset(pTag, 0, sizeof(STagData));
     
     //the source super table is moved to the secondary position of the pTableMetaInfo list
     if (pQueryInfo->numOfTables < 2) {
@@ -805,7 +812,14 @@ static int32_t tscCheckIfCreateTable(char **sqlstr, SSqlObj *pSql) {
       return code;
     }
 
+    STagData *pTag = realloc(pCmd->pTagData, offsetof(STagData, data));
+    if (pTag == NULL) {
+      return TSDB_CODE_TSC_OUT_OF_MEMORY;
+    }
+    memset(pTag, 0, offsetof(STagData, data));
     tstrncpy(pTag->name, pSTableMeterMetaInfo->name, sizeof(pTag->name));
+    pCmd->pTagData = pTag;
+
     code = tscGetTableMeta(pSql, pSTableMeterMetaInfo);
     if (code != TSDB_CODE_SUCCESS) {
       return code;
@@ -934,7 +948,13 @@ static int32_t tscCheckIfCreateTable(char **sqlstr, SSqlObj *pSql) {
       return TSDB_CODE_TSC_OUT_OF_MEMORY;
     }
     tdSortKVRowByColIdx(row);
-    pTag->dataLen = kvRowLen(row);
+
+    pTag = (STagData*)realloc(pCmd->pTagData, offsetof(STagData, data) + kvRowLen(row));
+    if (pTag == NULL) {
+      return TSDB_CODE_TSC_OUT_OF_MEMORY;
+    }
+    pCmd->pTagData = pTag;
+    pTag->dataLen = htonl(kvRowLen(row));
     kvRowCpy(pTag->data, row);
     free(row);
 
@@ -945,8 +965,6 @@ static int32_t tscCheckIfCreateTable(char **sqlstr, SSqlObj *pSql) {
       return tscSQLSyntaxErrMsg(pCmd->payload, ") expected", sToken.z);
     }
 
-    pTag->dataLen = htonl(pTag->dataLen);
-
     if (tscValidateName(&tableToken) != TSDB_CODE_SUCCESS) {
       return tscInvalidSQLErrMsg(pCmd->payload, "invalid table name", *sqlstr);
     }
@@ -1376,7 +1394,10 @@ static int doPackSendDataBlock(SSqlObj *pSql, int32_t numOfRows, STableDataBlock
   STableMeta *pTableMeta = tscGetTableMetaInfoFromCmd(pCmd, pCmd->clauseIndex, 0)->pTableMeta;
 
   SSubmitBlk *pBlocks = (SSubmitBlk *)(pTableDataBlocks->pData);
-  tsSetBlockInfo(pBlocks, pTableMeta, numOfRows);
+  code = tsSetBlockInfo(pBlocks, pTableMeta, numOfRows);
+  if (code != TSDB_CODE_SUCCESS) {
+    return tscInvalidSQLErrMsg(pCmd->payload, "too many rows in sql, total number of rows should be less than 32767", NULL);
+  }
 
   if ((code = tscMergeTableDataBlocks(pSql, pCmd->pDataBlocks)) != TSDB_CODE_SUCCESS) {
     return code;

src/client/src/tscProfile.c

@@ -39,6 +39,7 @@ void tscInitConnCb(void *param, TAOS_RES *result, int code) {
     tscSlowQueryConnInitialized = true;
     tscSaveSlowQueryFp(sql, NULL);
   }
+  taos_free_result(result);
 }
 
 void tscAddIntoSqlList(SSqlObj *pSql) {
@@ -69,6 +70,7 @@ void tscSaveSlowQueryFpCb(void *param, TAOS_RES *result, int code) {
   } else {
     tscDebug("success to save slow query, code:%d", code);
   }
+  taos_free_result(result);
 }
 
 void tscSaveSlowQueryFp(void *handle, void *tmrId) {

src/client/src/tscSQLParser.c

@@ -2835,6 +2835,10 @@ static bool functionCompatibleCheck(SQueryInfo* pQueryInfo, bool joinQuery) {
 
     if (functionCompatList[functionId] != factor) {
       return false;
+    } else {
+      if (factor == -1) { // two functions with the same -1 flag
+        return false;
+      }
     }
 
     if (functionId == TSDB_FUNC_LAST_ROW && joinQuery) {
@@ -4248,7 +4252,7 @@ static int32_t getTagQueryCondExpr(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, SCondE
     tExprTreeDestroy(&p, NULL);
     
     taosArrayDestroy(colList);
-    if (taosArrayGetSize(pQueryInfo->tagCond.pCond) > 0 && !UTIL_TABLE_IS_SUPER_TABLE(pTableMetaInfo)) {
+    if (pQueryInfo->tagCond.pCond != NULL && taosArrayGetSize(pQueryInfo->tagCond.pCond) > 0 && !UTIL_TABLE_IS_SUPER_TABLE(pTableMetaInfo)) {
       return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), "filter on tag not supported for normal table");
     }
   }
@@ -4256,6 +4260,7 @@ static int32_t getTagQueryCondExpr(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, SCondE
   pCondExpr->pTagCond = NULL;
   return ret;
 }
+
 int32_t parseWhereClause(SQueryInfo* pQueryInfo, tSQLExpr** pExpr, SSqlObj* pSql) {
   if (pExpr == NULL) {
     return TSDB_CODE_SUCCESS;
@@ -5102,7 +5107,7 @@ int32_t validateDNodeConfig(tDCLSQL* pOptions) {
   const int tokenDebugFlagEnd = 20;
   const SDNodeDynConfOption cfgOptions[] = {
       {"resetLog", 8},    {"resetQueryCache", 15},  {"balance", 7},     {"monitor", 7},
-      {"debugFlag", 9},   {"monitorDebugFlag", 16}, {"vDebugFlag", 10}, {"mDebugFlag", 10},
+      {"debugFlag", 9},   {"monDebugFlag", 12},     {"vDebugFlag", 10}, {"mDebugFlag", 10},
       {"cDebugFlag", 10}, {"httpDebugFlag", 13},    {"qDebugflag", 10}, {"sdbDebugFlag", 12},
       {"uDebugFlag", 10}, {"tsdbDebugFlag", 13},    {"sDebugflag", 10}, {"rpcDebugFlag", 12},
       {"dDebugFlag", 10}, {"mqttDebugFlag", 13},    {"wDebugFlag", 10}, {"tmrDebugFlag", 12},
@@ -5306,15 +5311,18 @@ int32_t parseLimitClause(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, int32_t clauseIn
 
     // keep original limitation value in globalLimit
     pQueryInfo->clauseLimit = pQueryInfo->limit.limit;
-    pQueryInfo->prjOffset = pQueryInfo->limit.offset;
+    pQueryInfo->prjOffset   = pQueryInfo->limit.offset;
+    pQueryInfo->tableLimit  = -1;
 
     if (tscOrderedProjectionQueryOnSTable(pQueryInfo, 0)) {
       /*
-       * the limitation/offset value should be removed during retrieve data from virtual node,
-       * since the global order are done in client side, so the limitation should also
-       * be done at the client side.
+       * the offset value should be removed during retrieve data from virtual node, since the
+       * global order are done in client side, so the offset is applied at the client side
+       * However, note that the maximum allowed number of result for each table should be less
+       * than or equal to the value of limit.
        */
       if (pQueryInfo->limit.limit > 0) {
+        pQueryInfo->tableLimit = pQueryInfo->limit.limit + pQueryInfo->limit.offset;
         pQueryInfo->limit.limit = -1;
       }
 
@@ -6648,7 +6656,7 @@ int32_t exprTreeFromSqlExpr(SSqlCmd* pCmd, tExprNode **pExpr, const tSQLExpr* pS
       
       return TSDB_CODE_SUCCESS;
     } else {
-      return TSDB_CODE_TSC_INVALID_SQL;
+      return invalidSqlErrMsg(tscGetErrorMsgPayload(pCmd), "not support filter expression");
     }
     
   } else {

src/client/src/tscServer.c

@@ -26,7 +26,7 @@
 #include "ttimer.h"
 #include "tlockfree.h"
 
-SRpcCorEpSet  tscMgmtEpSet;
+///SRpcCorEpSet  tscMgmtEpSet;
 
 int (*tscBuildMsg[TSDB_SQL_MAX])(SSqlObj *pSql, SSqlInfo *pInfo) = {0};
 
@@ -73,10 +73,11 @@ static void tscSetDnodeEpSet(SSqlObj* pSql, SVgroupInfo* pVgroupInfo) {
   assert(hasFqdn);
 }
 
-static void tscDumpMgmtEpSet(SRpcEpSet *epSet) {
-  taosCorBeginRead(&tscMgmtEpSet.version);
-  *epSet = tscMgmtEpSet.epSet;
-  taosCorEndRead(&tscMgmtEpSet.version);
+static void tscDumpMgmtEpSet(SSqlObj *pSql) {
+  SRpcCorEpSet *pCorEpSet = pSql->pTscObj->tscCorMgmtEpSet;
+  taosCorBeginRead(&pCorEpSet->version);
+  pSql->epSet = pCorEpSet->epSet;
+  taosCorEndRead(&pCorEpSet->version);
 }  
 static void tscEpSetHtons(SRpcEpSet *s) {
    for (int32_t i = 0; i < s->numOfEps; i++) {
@@ -94,11 +95,12 @@ bool tscEpSetIsEqual(SRpcEpSet *s1, SRpcEpSet *s2) {
    }
    return true;
 }
-void tscUpdateMgmtEpSet(SRpcEpSet *pEpSet) {
+void tscUpdateMgmtEpSet(SSqlObj *pSql, SRpcEpSet *pEpSet) {
   // no need to update if equal
-  taosCorBeginWrite(&tscMgmtEpSet.version);
-  tscMgmtEpSet.epSet = *pEpSet;
-  taosCorEndWrite(&tscMgmtEpSet.version);
+  SRpcCorEpSet *pCorEpSet = pSql->pTscObj->tscCorMgmtEpSet;
+  taosCorBeginWrite(&pCorEpSet->version);
+  pCorEpSet->epSet = *pEpSet;
+  taosCorEndWrite(&pCorEpSet->version);
 }
 static void tscDumpEpSetFromVgroupInfo(SCorVgroupInfo *pVgroupInfo, SRpcEpSet *pEpSet) {
   if (pVgroupInfo == NULL) { return;}
@@ -133,18 +135,6 @@ static void tscUpdateVgroupInfo(SSqlObj *pObj, SRpcEpSet *pEpSet) {
   taosCorEndWrite(&pVgroupInfo->version);
 }
 
-void tscPrintMgmtEp() {
-  SRpcEpSet dump;
-  tscDumpMgmtEpSet(&dump);
-  if (dump.numOfEps <= 0) {
-    tscError("invalid mnode EP list:%d", dump.numOfEps);
-  } else {
-    for (int i = 0; i < dump.numOfEps; ++i) {
-      tscDebug("mnode index:%d %s:%d", i, dump.fqdn[i], dump.port[i]);
-    }
-  }
-}
-
 void tscProcessHeartBeatRsp(void *param, TAOS_RES *tres, int code) {
   STscObj *pObj = (STscObj *)param;
   if (pObj == NULL) return;
@@ -162,7 +152,7 @@ void tscProcessHeartBeatRsp(void *param, TAOS_RES *tres, int code) {
     SRpcEpSet *    epSet = &pRsp->epSet;
     if (epSet->numOfEps > 0) {
       tscEpSetHtons(epSet);
-      tscUpdateMgmtEpSet(epSet);
+      tscUpdateMgmtEpSet(pSql, epSet);
     }
 
     pSql->pTscObj->connId = htonl(pRsp->connId);
@@ -175,10 +165,10 @@ void tscProcessHeartBeatRsp(void *param, TAOS_RES *tres, int code) {
       if (pRsp->streamId) tscKillStream(pObj, htonl(pRsp->streamId));
     }
   } else {
-    tscDebug("%p heartbeat failed, code:%s", pObj->pHb, tstrerror(code));
+    tscDebug("%" PRId64 " heartbeat failed, code:%s", pObj->hbrid, tstrerror(code));
   }
 
-  if (pObj->pHb != NULL) {
+  if (pObj->hbrid != 0) {
     int32_t waitingDuring = tsShellActivityTimer * 500;
     tscDebug("%p send heartbeat in %dms", pSql, waitingDuring);
 
@@ -191,22 +181,21 @@ void tscProcessHeartBeatRsp(void *param, TAOS_RES *tres, int code) {
 void tscProcessActivityTimer(void *handle, void *tmrId) {
   int64_t rid = (int64_t) handle;
   STscObj *pObj = taosAcquireRef(tscRefId, rid);
-  if (pObj == NULL) return; 
-
-  SSqlObj* pHB = pObj->pHb;
+  if (pObj == 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->rid);
+  SSqlObj* pHB = taosAcquireRef(tscObjRef, pObj->hbrid);
+  if (pHB == NULL) {
+    taosReleaseRef(tscRefId, rid);
     return;
   }
 
-  assert(*pHB->self == pHB);
+  assert(pHB->self == pObj->hbrid);
 
   pHB->retry = 0;
   int32_t code = tscProcessSql(pHB);
-  taosCacheRelease(tscObjCache, (void**) &p, false);
+  taosReleaseRef(tscObjRef, pObj->hbrid);
 
   if (code != TSDB_CODE_SUCCESS) {
     tscError("%p failed to sent HB to server, reason:%s", pHB, tstrerror(code));
@@ -227,7 +216,7 @@ int tscSendMsgToServer(SSqlObj *pSql) {
 
   // set the mgmt ip list
   if (pSql->cmd.command >= TSDB_SQL_MGMT) {
-    tscDumpMgmtEpSet(&pSql->epSet);
+    tscDumpMgmtEpSet(pSql);
   }
 
   memcpy(pMsg, pSql->cmd.payload, pSql->cmd.payloadLen);
@@ -236,7 +225,7 @@ int tscSendMsgToServer(SSqlObj *pSql) {
       .msgType = pSql->cmd.msgType,
       .pCont   = pMsg,
       .contLen = pSql->cmd.payloadLen,
-      .ahandle = pSql,
+      .ahandle = (void*)pSql->self,
       .handle  = NULL,
       .code    = 0
   };
@@ -247,26 +236,24 @@ int tscSendMsgToServer(SSqlObj *pSql) {
 
 void tscProcessMsgFromServer(SRpcMsg *rpcMsg, SRpcEpSet *pEpSet) {
   TSDB_CACHE_PTR_TYPE handle = (TSDB_CACHE_PTR_TYPE) rpcMsg->ahandle;
-  void** p = taosCacheAcquireByKey(tscObjCache, &handle, sizeof(TSDB_CACHE_PTR_TYPE));
-  if (p == NULL) {
+  SSqlObj* pSql = (SSqlObj*)taosAcquireRef(tscObjRef, handle);
+  if (pSql == NULL) {
     rpcFreeCont(rpcMsg->pCont);
     return;
   }
-
-  SSqlObj* pSql = *p;
-  assert(pSql != NULL);
+  assert(pSql->self == handle);
 
   STscObj *pObj = pSql->pTscObj;
   SSqlRes *pRes = &pSql->res;
   SSqlCmd *pCmd = &pSql->cmd;
 
-  assert(*pSql->self == pSql);
   pSql->rpcRid = -1;
 
   if (pObj->signature != pObj) {
     tscDebug("%p DB connection is closed, cmd:%d pObj:%p signature:%p", pSql, pCmd->command, pObj, pObj->signature);
 
-    taosCacheRelease(tscObjCache, (void**) &p, true);
+    taosRemoveRef(tscObjRef, pSql->self);
+    taosReleaseRef(tscObjRef, pSql->self);
     rpcFreeCont(rpcMsg->pCont);
     return;
   }
@@ -276,10 +263,8 @@ void tscProcessMsgFromServer(SRpcMsg *rpcMsg, SRpcEpSet *pEpSet) {
     tscDebug("%p sqlObj needs to be released or DB connection is closed, cmd:%d type:%d, pObj:%p signature:%p",
         pSql, pCmd->command, pQueryInfo->type, pObj, pObj->signature);
 
-    void** p1 = p;
-    taosCacheRelease(tscObjCache, (void**) &p1, false);
-
-    taosCacheRelease(tscObjCache, (void**) &p, true);
+    taosRemoveRef(tscObjRef, pSql->self);
+    taosReleaseRef(tscObjRef, pSql->self);
     rpcFreeCont(rpcMsg->pCont);
     return;
   }
@@ -289,7 +274,7 @@ void tscProcessMsgFromServer(SRpcMsg *rpcMsg, SRpcEpSet *pEpSet) {
       if (pCmd->command < TSDB_SQL_MGMT) {
         tscUpdateVgroupInfo(pSql, pEpSet);
       } else {
-        tscUpdateMgmtEpSet(pEpSet);
+        tscUpdateMgmtEpSet(pSql, pEpSet);
       }
     }
   }
@@ -322,7 +307,7 @@ void tscProcessMsgFromServer(SRpcMsg *rpcMsg, SRpcEpSet *pEpSet) {
 
       // if there is an error occurring, proceed to the following error handling procedure.
       if (rpcMsg->code == TSDB_CODE_TSC_ACTION_IN_PROGRESS) {
-        taosCacheRelease(tscObjCache, (void**) &p, false);
+        taosReleaseRef(tscObjRef, pSql->self);
         rpcFreeCont(rpcMsg->pCont);
         return;
       }
@@ -390,11 +375,10 @@ void tscProcessMsgFromServer(SRpcMsg *rpcMsg, SRpcEpSet *pEpSet) {
     (*pSql->fp)(pSql->param, pSql, rpcMsg->code);
   }
 
-  void** p1 = p;
-  taosCacheRelease(tscObjCache, (void**) &p1, false);
+  taosReleaseRef(tscObjRef, pSql->self);
 
   if (shouldFree) { // in case of table-meta/vgrouplist query, automatically free it
-    taosCacheRelease(tscObjCache, (void **)&p, true);
+    taosRemoveRef(tscObjRef, pSql->self);
     tscDebug("%p sqlObj is automatically freed", pSql);
   }
 
@@ -697,6 +681,7 @@ int tscBuildQueryMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
   pQueryMsg->tagNameRelType = htons(pQueryInfo->tagCond.relType);
   pQueryMsg->numOfTags      = htonl(numOfTags);
   pQueryMsg->queryType      = htonl(pQueryInfo->type);
+  pQueryMsg->tableLimit     = htobe64(pQueryInfo->tableLimit);
   
   size_t numOfOutput = tscSqlExprNumOfExprs(pQueryInfo);
   pQueryMsg->numOfOutput = htons((int16_t)numOfOutput);  // this is the stage one output column number
@@ -1565,11 +1550,11 @@ int tscBuildTableMetaMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
 
   char *pMsg = (char *)pInfoMsg + sizeof(STableInfoMsg);
 
-  size_t len = htonl(pCmd->tagData.dataLen);
-  if (pSql->cmd.autoCreated) {
+  if (pCmd->autoCreated && pCmd->pTagData != NULL) {
+    int len = htonl(pCmd->pTagData->dataLen);
     if (len > 0) {
-      len += sizeof(pCmd->tagData.name) + sizeof(pCmd->tagData.dataLen);
-      memcpy(pInfoMsg->tags, &pCmd->tagData, len);
+      len += sizeof(pCmd->pTagData->name) + sizeof(pCmd->pTagData->dataLen);
+      memcpy(pInfoMsg->tags, pCmd->pTagData, len);
       pMsg += len;
     }
   }
@@ -2020,7 +2005,7 @@ int tscProcessShowRsp(SSqlObj *pSql) {
 
 // TODO multithread problem
 static void createHBObj(STscObj* pObj) {
-  if (pObj->pHb != NULL) {
+  if (pObj->hbrid != 0) {
     return;
   }
 
@@ -2052,7 +2037,7 @@ static void createHBObj(STscObj* pObj) {
   registerSqlObj(pSql);
   tscDebug("%p HB is allocated, pObj:%p", pSql, pObj);
 
-  pObj->pHb = pSql;
+  pObj->hbrid = pSql->self;
 }
 
 int tscProcessConnectRsp(SSqlObj *pSql) {
@@ -2070,7 +2055,7 @@ int tscProcessConnectRsp(SSqlObj *pSql) {
   
   if (pConnect->epSet.numOfEps > 0) {
     tscEpSetHtons(&pConnect->epSet);
-    tscUpdateMgmtEpSet(&pConnect->epSet);
+    tscUpdateMgmtEpSet(pSql, &pConnect->epSet);
   } 
 
   strcpy(pObj->sversion, pConnect->serverVersion);
@@ -2239,8 +2224,6 @@ static int32_t getTableMetaFromMgmt(SSqlObj *pSql, STableMetaInfo *pTableMetaInf
   pNew->signature = pNew;
   pNew->cmd.command = TSDB_SQL_META;
 
-  registerSqlObj(pNew);
-
   tscAddSubqueryInfo(&pNew->cmd);
 
   SQueryInfo *pNewQueryInfo = tscGetQueryInfoDetailSafely(&pNew->cmd, 0);
@@ -2248,8 +2231,7 @@ static int32_t getTableMetaFromMgmt(SSqlObj *pSql, STableMetaInfo *pTableMetaInf
   pNew->cmd.autoCreated = pSql->cmd.autoCreated;  // create table if not exists
   if (TSDB_CODE_SUCCESS != tscAllocPayload(&pNew->cmd, TSDB_DEFAULT_PAYLOAD_SIZE + pSql->cmd.payloadLen)) {
     tscError("%p malloc failed for payload to get table meta", pSql);
-    free(pNew);
-
+    tscFreeSqlObj(pNew);
     return TSDB_CODE_TSC_OUT_OF_MEMORY;
   }
 
@@ -2257,12 +2239,25 @@ static int32_t getTableMetaFromMgmt(SSqlObj *pSql, STableMetaInfo *pTableMetaInf
   assert(pNew->cmd.numOfClause == 1 && pNewQueryInfo->numOfTables == 1);
 
   tstrncpy(pNewMeterMetaInfo->name, pTableMetaInfo->name, sizeof(pNewMeterMetaInfo->name));
-  memcpy(&pNew->cmd.tagData, &pSql->cmd.tagData, sizeof(pSql->cmd.tagData));
+
+  if (pSql->cmd.pTagData != NULL) {
+    int size = offsetof(STagData, data) + htonl(pSql->cmd.pTagData->dataLen);
+    pNew->cmd.pTagData = calloc(1, size);
+    if (pNew->cmd.pTagData == NULL) {
+      tscError("%p malloc failed for new tag data to get table meta", pSql);
+      tscFreeSqlObj(pNew);
+      return TSDB_CODE_TSC_OUT_OF_MEMORY;
+    }
+    memcpy(pNew->cmd.pTagData, pSql->cmd.pTagData, size);
+  }
+
   tscDebug("%p new pSqlObj:%p to get tableMeta, auto create:%d", pSql, pNew, pNew->cmd.autoCreated);
 
   pNew->fp = tscTableMetaCallBack;
   pNew->param = pSql;
 
+  registerSqlObj(pNew);
+
   int32_t code = tscProcessSql(pNew);
   if (code == TSDB_CODE_SUCCESS) {
     code = TSDB_CODE_TSC_ACTION_IN_PROGRESS;  // notify upper application that current process need to be terminated

src/client/src/tscSql.c

@@ -58,6 +58,7 @@ static SSqlObj *taosConnectImpl(const char *ip, const char *user, const char *pa
     terrno = TSDB_CODE_TSC_INVALID_USER_LENGTH;
     return NULL;
   }
+  SRpcCorEpSet corMgmtEpSet;
 
   char secretEncrypt[32] = {0};
   int  secretEncryptLen = 0;
@@ -82,11 +83,13 @@ static SSqlObj *taosConnectImpl(const char *ip, const char *user, const char *pa
     }
     secretEncryptLen = outlen;
   }
-
+  
   if (ip) {
-    if (tscSetMgmtEpSetFromCfg(ip, NULL) < 0) return NULL;
-    if (port) tscMgmtEpSet.epSet.port[0] = port;
-  } 
+    if (tscSetMgmtEpSetFromCfg(ip, NULL, &corMgmtEpSet) < 0) return NULL;
+    if (port) corMgmtEpSet.epSet.port[0] = port;
+  } else {
+    if (tscSetMgmtEpSetFromCfg(tsFirst, tsSecond, &corMgmtEpSet) < 0) return NULL;
+  }
  
   void *pDnodeConn = NULL;
   if (tscInitRpc(user, secretEncrypt, &pDnodeConn) != 0) {
@@ -100,10 +103,20 @@ static SSqlObj *taosConnectImpl(const char *ip, const char *user, const char *pa
     rpcClose(pDnodeConn);
     return NULL;
   }
+  // set up tscObj's mgmtEpSet
+  pObj->tscCorMgmtEpSet = (SRpcCorEpSet *)malloc(sizeof(SRpcCorEpSet));
+  if (NULL == pObj->tscCorMgmtEpSet) {
+    terrno = TSDB_CODE_TSC_OUT_OF_MEMORY;
+    rpcClose(pDnodeConn);
+    free(pObj->tscCorMgmtEpSet);
+    free(pObj);
+  }
+  memcpy(pObj->tscCorMgmtEpSet, &corMgmtEpSet, sizeof(SRpcCorEpSet));
 
   pObj->signature = pObj;
   pObj->pDnodeConn = pDnodeConn;
   T_REF_INIT_VAL(pObj, 1);
+  
 
   tstrncpy(pObj->user, user, sizeof(pObj->user));
   secretEncryptLen = MIN(secretEncryptLen, sizeof(pObj->pass));
@@ -115,6 +128,7 @@ static SSqlObj *taosConnectImpl(const char *ip, const char *user, const char *pa
     if (len >= TSDB_DB_NAME_LEN) {
       terrno = TSDB_CODE_TSC_INVALID_DB_LENGTH;
       rpcClose(pDnodeConn);
+      free(pObj->tscCorMgmtEpSet);
       free(pObj);
       return NULL;
     }
@@ -132,6 +146,7 @@ static SSqlObj *taosConnectImpl(const char *ip, const char *user, const char *pa
   if (NULL == pSql) {
     terrno = TSDB_CODE_TSC_OUT_OF_MEMORY;
     rpcClose(pDnodeConn);
+    free(pObj->tscCorMgmtEpSet);
     free(pObj);
     return NULL;
   }
@@ -149,6 +164,7 @@ static SSqlObj *taosConnectImpl(const char *ip, const char *user, const char *pa
     terrno = TSDB_CODE_TSC_OUT_OF_MEMORY;
     rpcClose(pDnodeConn);
     free(pSql);
+    free(pObj->tscCorMgmtEpSet);
     free(pObj);
     return NULL;
   }
@@ -276,15 +292,18 @@ void taos_close(TAOS *taos) {
   pObj->signature = NULL;
   taosTmrStopA(&(pObj->pTimer));
 
-  SSqlObj* pHb = pObj->pHb;
-  if (pHb != NULL && atomic_val_compare_exchange_ptr(&pObj->pHb, pHb, 0) == pHb) {
-    if (pHb->rpcRid > 0) {  // wait for rsp from dnode
-      rpcCancelRequest(pHb->rpcRid);
-      pHb->rpcRid = -1;
-    }
+  if (pObj->hbrid > 0) {
+    SSqlObj* pHb = (SSqlObj*)taosAcquireRef(tscObjRef, pObj->hbrid);
+    if (pHb != NULL) {
+      if (pHb->rpcRid > 0) {  // wait for rsp from dnode
+        rpcCancelRequest(pHb->rpcRid);
+        pHb->rpcRid = -1;
+      }
 
-    tscDebug("%p HB is freed", pHb);
-    taos_free_result(pHb);
+      tscDebug("%p HB is freed", pHb);
+      taos_free_result(pHb);
+      taosReleaseRef(tscObjRef, pHb->self);
+    }
   }
 
   int32_t ref = T_REF_DEC(pObj);
@@ -606,8 +625,7 @@ void taos_free_result(TAOS_RES *res) {
   bool freeNow = tscKillQueryInDnode(pSql);
   if (freeNow) {
     tscDebug("%p free sqlObj in cache", pSql);
-    SSqlObj** p = pSql->self;
-    taosCacheRelease(tscObjCache, (void**) &p, true);
+    taosReleaseRef(tscObjRef, pSql->self);
   }
 }
 
@@ -700,13 +718,7 @@ static void tscKillSTableQuery(SSqlObj *pSql) {
       continue;
     }
 
-    void** p = taosCacheAcquireByKey(tscObjCache, &pSub, sizeof(TSDB_CACHE_PTR_TYPE));
-    if (p == NULL) {
-      continue;
-    }
-
-    SSqlObj* pSubObj = (SSqlObj*) (*p);
-    assert(pSubObj->self == (SSqlObj**) p);
+    SSqlObj* pSubObj = pSub;
 
     pSubObj->res.code = TSDB_CODE_TSC_QUERY_CANCELLED;
     if (pSubObj->rpcRid > 0) {
@@ -715,7 +727,7 @@ static void tscKillSTableQuery(SSqlObj *pSql) {
     }
 
     tscQueueAsyncRes(pSubObj);
-    taosCacheRelease(tscObjCache, (void**) &p, false);
+    taosReleaseRef(tscObjRef, pSubObj->self);
   }
 
   tscDebug("%p super table query cancelled", pSql);

src/client/src/tscSub.c

@@ -157,7 +157,7 @@ static SSub* tscCreateSubscription(STscObj* pObj, const char* topic, const char*
 
   registerSqlObj(pSql);
 
-  code = tsParseSql(pSql, false);
+  code = tsParseSql(pSql, true);
   if (code == TSDB_CODE_TSC_ACTION_IN_PROGRESS) {
     tsem_wait(&pSub->sem);
     code = pSql->res.code;
@@ -168,7 +168,7 @@ static SSub* tscCreateSubscription(STscObj* pObj, const char* topic, const char*
     goto fail;
   }
 
-  if (pSql->cmd.command != TSDB_SQL_SELECT) {
+  if (pSql->cmd.command != TSDB_SQL_SELECT && pSql->cmd.command != TSDB_SQL_RETRIEVE_EMPTY_RESULT) {
     line = __LINE__;
     code = TSDB_CODE_TSC_INVALID_SQL;
     goto fail;
@@ -179,10 +179,10 @@ static SSub* tscCreateSubscription(STscObj* pObj, const char* topic, const char*
 fail:
   tscError("tscCreateSubscription failed at line %d, reason: %s", line, tstrerror(code));
   if (pSql != NULL) {
-    if (pSql->self != NULL) {
-      taos_free_result(pSql);
+    if (pSql->self != 0) {
+      taosReleaseRef(tscObjRef, pSql->self);
     } else {
-      tscFreeSqlObj(pSql);
+    tscFreeSqlObj(pSql);
     }
 
     pSql = NULL;
@@ -401,9 +401,11 @@ TAOS_SUB *taos_subscribe(TAOS *taos, int restart, const char* topic, const char
     tscLoadSubscriptionProgress(pSub);
   }
 
-  if (!tscUpdateSubscription(pObj, pSub)) {
-    taos_unsubscribe(pSub, 1);
-    return NULL;
+  if (pSub->pSql->cmd.command == TSDB_SQL_SELECT) {
+    if (!tscUpdateSubscription(pObj, pSub)) {
+      taos_unsubscribe(pSub, 1);
+      return NULL;
+    }
   }
 
   pSub->interval = interval;
@@ -417,10 +419,80 @@ TAOS_SUB *taos_subscribe(TAOS *taos, int restart, const char* topic, const char
   return pSub;
 }
 
+SSqlObj* recreateSqlObj(SSub* pSub) {
+  SSqlObj* pSql = calloc(1, sizeof(SSqlObj));
+  if (pSql == NULL) {
+    return NULL;
+  }
+
+  pSql->signature = pSql;
+  pSql->pTscObj = pSub->taos;
+
+  SSqlCmd* pCmd = &pSql->cmd;
+  SSqlRes* pRes = &pSql->res;
+  if (tsem_init(&pSql->rspSem, 0, 0) == -1) {
+    tscFreeSqlObj(pSql);
+    return NULL;
+  }
+
+  pSql->param = pSub;
+  pSql->maxRetry = TSDB_MAX_REPLICA;
+  pSql->fp = asyncCallback;
+  pSql->fetchFp = asyncCallback;
+  pSql->sqlstr = strdup(pSub->pSql->sqlstr);
+  if (pSql->sqlstr == NULL) {
+    tscFreeSqlObj(pSql);
+    return NULL;
+  }
+
+  pRes->qhandle = 0;
+  pRes->numOfRows = 1;
+
+  int code = tscAllocPayload(pCmd, TSDB_DEFAULT_PAYLOAD_SIZE);
+  if (code != TSDB_CODE_SUCCESS) {
+    tscFreeSqlObj(pSql);
+    return NULL;
+  }
+
+  registerSqlObj(pSql);
+
+  code = tsParseSql(pSql, true);
+  if (code == TSDB_CODE_TSC_ACTION_IN_PROGRESS) {
+    tsem_wait(&pSub->sem);
+    code = pSql->res.code;
+  }
+
+  if (code != TSDB_CODE_SUCCESS) {
+    taosReleaseRef(tscObjRef, pSql->self);
+    return NULL;
+  }
+
+  if (pSql->cmd.command != TSDB_SQL_SELECT) {
+    taosReleaseRef(tscObjRef, pSql->self);
+    return NULL;
+  }
+
+  return pSql;
+}
+
 TAOS_RES *taos_consume(TAOS_SUB *tsub) {
   SSub *pSub = (SSub *)tsub;
   if (pSub == NULL) return NULL;
 
+  if (pSub->pSql->cmd.command == TSDB_SQL_RETRIEVE_EMPTY_RESULT) {
+    SSqlObj* pSql = recreateSqlObj(pSub);
+    if (pSql == NULL) {
+      return NULL;
+    }
+    if (pSub->pSql->self != 0) {
+      taosReleaseRef(tscObjRef, pSub->pSql->self);
+    } else {
+      tscFreeSqlObj(pSub->pSql);
+    }
+    pSub->pSql = pSql;
+    pSql->pSubscription = pSub;
+  }
+
   tscSaveSubscriptionProgress(pSub);
 
   SSqlObj *pSql = pSub->pSql;
@@ -442,7 +514,12 @@ TAOS_RES *taos_consume(TAOS_SUB *tsub) {
 
   size_t size = taosArrayGetSize(pSub->progress) * sizeof(STableIdInfo);
   size += sizeof(SQueryTableMsg) + 4096;
-  tscAllocPayload(&pSql->cmd, (int)size);
+  int code = tscAllocPayload(&pSql->cmd, (int)size);
+  if (code != TSDB_CODE_SUCCESS) {
+    tscError("failed to alloc payload");
+    return NULL;
+  }
+
   for (int retry = 0; retry < 3; retry++) {
     tscRemoveFromSqlList(pSql);
 
@@ -507,10 +584,13 @@ void taos_unsubscribe(TAOS_SUB *tsub, int keepProgress) {
   }
 
   if (pSub->pSql != NULL) {
-    taos_free_result(pSub->pSql);
+    if (pSub->pSql->self != 0) {
+      taosReleaseRef(tscObjRef, pSub->pSql->self);
+    } else {
+      tscFreeSqlObj(pSub->pSql);
+    }
   }
 
-  tscFreeSqlObj(pSub->pSql);
   taosArrayDestroy(pSub->progress);
   tsem_destroy(&pSub->sem);
   memset(pSub, 0, sizeof(*pSub));

src/client/src/tscSubquery.c

@@ -2198,6 +2198,9 @@ int32_t tscHandleInsertRetry(SSqlObj* pSql) {
   STableDataBlocks* pTableDataBlock = taosArrayGetP(pCmd->pDataBlocks, pSupporter->index);
   int32_t code = tscCopyDataBlockToPayload(pSql, pTableDataBlock);
 
+  // free the data block created from insert sql string
+  pCmd->pDataBlocks = tscDestroyBlockArrayList(pCmd->pDataBlocks);
+
   if ((pRes->code = code)!= TSDB_CODE_SUCCESS) {
     tscQueueAsyncRes(pSql);
     return code;  // here the pSql may have been released already.

src/client/src/tscSystem.c

@@ -15,7 +15,7 @@
 
 #include "os.h"
 #include "taosmsg.h"
-#include "tcache.h"
+#include "tref.h"
 #include "trpc.h"
 #include "tsystem.h"
 #include "ttimer.h"
@@ -31,7 +31,7 @@
 
 // global, not configurable
 SCacheObj*  tscMetaCache;
-SCacheObj*  tscObjCache;
+int     tscObjRef = -1;
 void *  tscTmr;
 void *  tscQhandle;
 void *  tscCheckDiskUsageTmr;
@@ -116,11 +116,6 @@ void taos_init_imp(void) {
     taosInitNote(tsNumOfLogLines / 10, 1, (char*)"tsc_note");
   }
 
-  if (tscSetMgmtEpSetFromCfg(tsFirst, tsSecond) < 0) {
-    tscError("failed to init mnode EP list");
-    return;
-  } 
-
   tscInitMsgsFp();
   int queueSize = tsMaxConnections*2;
 
@@ -144,7 +139,7 @@ void taos_init_imp(void) {
   int64_t refreshTime = 10; // 10 seconds by default
   if (tscMetaCache == NULL) {
     tscMetaCache = taosCacheInit(TSDB_DATA_TYPE_BINARY, refreshTime, false, tscFreeTableMetaHelper, "tableMeta");
-    tscObjCache = taosCacheInit(TSDB_CACHE_PTR_KEY, refreshTime / 2, false, tscFreeRegisteredSqlObj, "sqlObj");
+    tscObjRef = taosOpenRef(40960, tscFreeRegisteredSqlObj);
   }
 
   tscRefId = taosOpenRef(200, tscCloseTscObj);
@@ -167,9 +162,9 @@ void taos_cleanup(void) {
     taosCacheCleanup(m);
   }
 
-  m = tscObjCache;
-  if (m != NULL && atomic_val_compare_exchange_ptr(&tscObjCache, m, 0) == m) {
-    taosCacheCleanup(m);
+  int refId = atomic_exchange_32(&tscObjRef, -1);
+  if (refId != -1) {
+    taosCloseRef(refId);
   }
 
   m = tscQhandle;

src/client/src/tscUtil.c

@@ -408,7 +408,7 @@ void tscResetSqlCmdObj(SSqlCmd* pCmd, bool removeFromCache) {
   pCmd->pTableList = NULL;
   
   pCmd->pDataBlocks = tscDestroyBlockArrayList(pCmd->pDataBlocks);
-  
+
   tscFreeQueryInfo(pCmd, removeFromCache);
 }
 
@@ -447,20 +447,18 @@ static void tscFreeSubobj(SSqlObj* pSql) {
 void tscFreeRegisteredSqlObj(void *pSql) {
   assert(pSql != NULL);
 
-  SSqlObj** p = (SSqlObj**)pSql;
-  STscObj* pTscObj = (*p)->pTscObj;
-
-  assert((*p)->self != 0 && (*p)->self == (p));
+  SSqlObj* p = *(SSqlObj**)pSql;
+  STscObj* pTscObj = p->pTscObj;
 
-  SSqlObj* ptr = *p;
-  tscFreeSqlObj(*p);
+  assert(p->self != 0);
+  tscFreeSqlObj(p);
 
   int32_t ref = T_REF_DEC(pTscObj);
   assert(ref >= 0);
 
-  tscDebug("%p free sqlObj completed, tscObj:%p ref:%d", ptr, pTscObj, ref);
+  tscDebug("%p free sqlObj completed, tscObj:%p ref:%d", p, pTscObj, ref);
   if (ref == 0) {
-    tscDebug("%p all sqlObj freed, free tscObj:%p", ptr, pTscObj);
+    tscDebug("%p all sqlObj freed, free tscObj:%p", p, pTscObj);
     taosRemoveRef(tscRefId, pTscObj->rid);
   }
 }
@@ -512,6 +510,8 @@ void tscFreeSqlObj(SSqlObj* pSql) {
   tscFreeSqlResult(pSql);
   tscResetSqlCmdObj(pCmd, false);
 
+  tfree(pCmd->pTagData);
+  
   memset(pCmd->payload, 0, (size_t)pCmd->allocSize);
   tfree(pCmd->payload);
   pCmd->allocSize = 0;
@@ -838,7 +838,6 @@ int32_t tscMergeTableDataBlocks(SSqlObj* pSql, SArray* pTableDataBlockList) {
 
     // the length does not include the SSubmitBlk structure
     pBlocks->dataLen = htonl(finalLen);
-
     dataBuf->numOfTables += 1;
   }
 
@@ -865,7 +864,7 @@ void tscCloseTscObj(void *param) {
     rpcClose(pObj->pDnodeConn);
     pObj->pDnodeConn = NULL;
   }
-
+  tfree(pObj->tscCorMgmtEpSet);
   pthread_mutex_destroy(&pObj->mutex);
 
   tscDebug("%p DB connection is closed, dnodeConn:%p", pObj, p);
@@ -1563,19 +1562,6 @@ void tscGetSrcColumnInfo(SSrcColumnInfo* pColInfo, SQueryInfo* pQueryInfo) {
   }
 }
 
-void tscSetFreeHeatBeat(STscObj* pObj) {
-  if (pObj == NULL || pObj->signature != pObj || pObj->pHb == NULL) {
-    return;
-  }
-
-  SSqlObj* pHeatBeat = pObj->pHb;
-  assert(pHeatBeat == pHeatBeat->signature);
-
-  // to denote the heart-beat timer close connection and free all allocated resources
-  SQueryInfo* pQueryInfo = tscGetQueryInfoDetail(&pHeatBeat->cmd, 0);
-  pQueryInfo->type = TSDB_QUERY_TYPE_FREE_RESOURCE;
-}
-
 /*
  * the following four kinds of SqlObj should not be freed
  * 1. SqlObj for stream computing
@@ -1594,7 +1580,7 @@ bool tscShouldBeFreed(SSqlObj* pSql) {
   }
   
   STscObj* pTscObj = pSql->pTscObj;
-  if (pSql->pStream != NULL || pTscObj->pHb == pSql || pSql->pSubscription != NULL) {
+  if (pSql->pStream != NULL || pTscObj->hbrid == pSql->self || pSql->pSubscription != NULL) {
     return false;
   }
 
@@ -1886,13 +1872,10 @@ void tscResetForNextRetrieve(SSqlRes* pRes) {
 }
 
 void registerSqlObj(SSqlObj* pSql) {
-  int32_t DEFAULT_LIFE_TIME = 2 * 600 * 1000;  // 1200 sec
-
   int32_t ref = T_REF_INC(pSql->pTscObj);
   tscDebug("%p add to tscObj:%p, ref:%d", pSql, pSql->pTscObj, ref);
 
-  TSDB_CACHE_PTR_TYPE p = (TSDB_CACHE_PTR_TYPE) pSql;
-  pSql->self = taosCachePut(tscObjCache, &p, sizeof(TSDB_CACHE_PTR_TYPE), &p, sizeof(TSDB_CACHE_PTR_TYPE), DEFAULT_LIFE_TIME);
+  pSql->self = taosAddRef(tscObjRef, pSql);
 }
 
 SSqlObj* createSimpleSubObj(SSqlObj* pSql, void (*fp)(), void* param, int32_t cmd) {
@@ -1909,7 +1892,17 @@ SSqlObj* createSimpleSubObj(SSqlObj* pSql, void (*fp)(), void* param, int32_t cm
   pCmd->command = cmd;
   pCmd->parseFinished = 1;
   pCmd->autoCreated = pSql->cmd.autoCreated;
-  memcpy(&pCmd->tagData, &pSql->cmd.tagData, sizeof(pCmd->tagData));
+
+  if (pSql->cmd.pTagData != NULL) {
+    int size = offsetof(STagData, data) + htonl(pSql->cmd.pTagData->dataLen);
+    pNew->cmd.pTagData = calloc(1, size);
+    if (pNew->cmd.pTagData == NULL) {
+      tscError("%p new subquery failed, unable to malloc tag data, tableIndex:%d", pSql, 0);
+      free(pNew);
+      return NULL;
+    }
+    memcpy(pNew->cmd.pTagData, pSql->cmd.pTagData, size);
+  }
 
   if (tscAddSubqueryInfo(pCmd) != TSDB_CODE_SUCCESS) {
     tscFreeSqlObj(pNew);
@@ -2447,10 +2440,10 @@ char* strdup_throw(const char* str) {
   return p;
 }
 
-int tscSetMgmtEpSetFromCfg(const char *first, const char *second) {
+int tscSetMgmtEpSetFromCfg(const char *first, const char *second, SRpcCorEpSet *corMgmtEpSet) {
+  corMgmtEpSet->version = 0;
   // init mgmt ip set 
-  tscMgmtEpSet.version = 0;
-  SRpcEpSet *mgmtEpSet = &(tscMgmtEpSet.epSet);
+  SRpcEpSet *mgmtEpSet = &(corMgmtEpSet->epSet);
   mgmtEpSet->numOfEps = 0;
   mgmtEpSet->inUse = 0;
 

src/common/inc/tglobal.h

@@ -35,6 +35,7 @@ extern int32_t  tsNumOfMnodes;
 extern int32_t  tsEnableVnodeBak;
 extern int32_t  tsEnableTelemetryReporting;
 extern char     tsEmail[];
+extern char     tsArbitrator[];
 
 // common
 extern int      tsRpcTimer;
@@ -56,6 +57,7 @@ extern char     tsTempDir[];
 
 //query buffer management
 extern int32_t  tsQueryBufferSize;      // maximum allowed usage buffer for each data node during query processing
+extern int32_t  tsHalfCoresForQuery;         // only 50% will be used in query processing
 
 // client
 extern int32_t tsTableMetaKeepTimer;
@@ -125,6 +127,9 @@ extern char    tsMonitorDbName[];
 extern char    tsInternalPass[];
 extern int32_t tsMonitorInterval;
 
+// stream
+extern int32_t tsEnableStream;
+
 // internal
 extern int32_t tsPrintAuth;
 extern int32_t tscEmbedded;
@@ -176,7 +181,7 @@ extern int32_t tmrDebugFlag;
 extern int32_t sdbDebugFlag;
 extern int32_t httpDebugFlag;
 extern int32_t mqttDebugFlag;
-extern int32_t monitorDebugFlag;
+extern int32_t monDebugFlag;
 extern int32_t uDebugFlag;
 extern int32_t rpcDebugFlag;
 extern int32_t odbcDebugFlag;

src/common/inc/tname.h

@@ -25,6 +25,8 @@ void extractTableName(const char *tableId, char *name);
 
 char* extractDBName(const char *tableId, char *name);
 
+size_t tableIdPrefix(const char* name, char* prefix, int32_t len);
+
 void extractTableNameFromToken(SStrToken *pToken, SStrToken* pTable);
 
 SSchema tGetTableNameColumnSchema();

src/common/src/tglobal.c

@@ -107,6 +107,9 @@ int64_t tsMaxRetentWindow = 24 * 3600L;  // maximum time window tolerance
 // positive value (in MB)
 int32_t tsQueryBufferSize = -1;
 
+// only 50% cpu will be used in query processing in dnode
+int32_t tsHalfCoresForQuery = 0;
+
 // db parameters
 int32_t tsCacheBlockSize = TSDB_DEFAULT_CACHE_BLOCK_SIZE;
 int32_t tsBlocksPerVnode = TSDB_DEFAULT_TOTAL_BLOCKS;
@@ -161,6 +164,9 @@ char    tsMonitorDbName[TSDB_DB_NAME_LEN] = "log";
 char    tsInternalPass[] = "secretkey";
 int32_t tsMonitorInterval = 30;  // seconds
 
+// stream
+int32_t tsEnableStream = 1;
+
 // internal
 int32_t tsPrintAuth = 0;
 int32_t tscEmbedded = 0;
@@ -200,13 +206,13 @@ int32_t tsNumOfLogLines = 10000000;
 int32_t mDebugFlag = 135;
 int32_t sdbDebugFlag = 135;
 int32_t dDebugFlag = 135;
-int32_t vDebugFlag = 131;
+int32_t vDebugFlag = 135;
 int32_t cDebugFlag = 131;
 int32_t jniDebugFlag = 131;
 int32_t odbcDebugFlag = 131;
 int32_t httpDebugFlag = 131;
 int32_t mqttDebugFlag = 131;
-int32_t monitorDebugFlag = 131;
+int32_t monDebugFlag = 131;
 int32_t qDebugFlag = 131;
 int32_t rpcDebugFlag = 131;
 int32_t uDebugFlag = 131;
@@ -216,9 +222,9 @@ int32_t wDebugFlag = 135;
 int32_t tsdbDebugFlag = 131;
 int32_t cqDebugFlag = 135;
 
-int32_t (*monitorStartSystemFp)() = NULL;
-void (*monitorStopSystemFp)() = NULL;
-void (*monitorExecuteSQLFp)(char *sql) = NULL;
+int32_t (*monStartSystemFp)() = NULL;
+void (*monStopSystemFp)() = NULL;
+void (*monExecuteSQLFp)(char *sql) = NULL;
 
 char *qtypeStr[] = {"rpc", "fwd", "wal", "cq", "query"};
 
@@ -235,7 +241,7 @@ void taosSetAllDebugFlag() {
     odbcDebugFlag = debugFlag;
     httpDebugFlag = debugFlag;
     mqttDebugFlag = debugFlag;
-    monitorDebugFlag = debugFlag;
+    monDebugFlag = debugFlag;
     qDebugFlag = debugFlag;    
     rpcDebugFlag = debugFlag;
     uDebugFlag = debugFlag;
@@ -276,15 +282,15 @@ bool taosCfgDynamicOptions(char *msg) {
 
     if (strncasecmp(cfg->option, "monitor", olen) == 0) {
       if (1 == vint) {
-        if (monitorStartSystemFp) {
-          (*monitorStartSystemFp)();
+        if (monStartSystemFp) {
+          (*monStartSystemFp)();
           uInfo("monitor is enabled");
         } else {
           uError("monitor can't be updated, for monitor not initialized");
         }
       } else {
-        if (monitorStopSystemFp) {
-          (*monitorStopSystemFp)();
+        if (monStopSystemFp) {
+          (*monStopSystemFp)();
           uInfo("monitor is disabled");
         } else {
           uError("monitor can't be updated, for monitor not initialized");
@@ -307,8 +313,8 @@ bool taosCfgDynamicOptions(char *msg) {
   }
 
   if (strncasecmp(option, "resetQueryCache", 15) == 0) {
-    if (monitorExecuteSQLFp) {
-      (*monitorExecuteSQLFp)("resetQueryCache");
+    if (monExecuteSQLFp) {
+      (*monExecuteSQLFp)("resetQueryCache");
       uInfo("resetquerycache is executed");
     } else {
       uError("resetquerycache can't be executed, for monitor not started");
@@ -881,6 +887,16 @@ static void doInitGlobalConfig(void) {
   cfg.unitType = TAOS_CFG_UTYPE_BYTE;
   taosInitConfigOption(cfg);
 
+  cfg.option = "halfCoresForQuery";
+  cfg.ptr = &tsHalfCoresForQuery;
+  cfg.valType = TAOS_CFG_VTYPE_INT32;
+  cfg.cfgType = TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_SHOW;
+  cfg.minValue = 0;
+  cfg.maxValue = 1;
+  cfg.ptrLength = 1;
+  cfg.unitType = TAOS_CFG_UTYPE_NONE;
+  taosInitConfigOption(cfg);
+
   // locale & charset
   cfg.option = "timezone";
   cfg.ptr = tsTimezone;
@@ -1015,6 +1031,16 @@ static void doInitGlobalConfig(void) {
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
   taosInitConfigOption(cfg);
 
+  cfg.option = "stream";
+  cfg.ptr = &tsEnableStream;
+  cfg.valType = TAOS_CFG_VTYPE_INT32;
+  cfg.cfgType = TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_SHOW;
+  cfg.minValue = 0;
+  cfg.maxValue = 1;
+  cfg.ptrLength = 1;
+  cfg.unitType = TAOS_CFG_UTYPE_NONE;
+  taosInitConfigOption(cfg);
+
   cfg.option = "httpEnableRecordSql";
   cfg.ptr = &tsHttpEnableRecordSql;
   cfg.valType = TAOS_CFG_VTYPE_INT32;
@@ -1227,8 +1253,8 @@ static void doInitGlobalConfig(void) {
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
   taosInitConfigOption(cfg);
 
-  cfg.option = "monitorDebugFlag";
-  cfg.ptr = &monitorDebugFlag;
+  cfg.option = "monDebugFlag";
+  cfg.ptr = &monDebugFlag;
   cfg.valType = TAOS_CFG_VTYPE_INT32;
   cfg.cfgType = TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_LOG;
   cfg.minValue = 0;
@@ -1277,7 +1303,7 @@ static void doInitGlobalConfig(void) {
   cfg.unitType = TAOS_CFG_UTYPE_NONE;
   taosInitConfigOption(cfg);
 
-  cfg.option = "tscEnableRecordSql";
+  cfg.option = "enableRecordSql";
   cfg.ptr = &tsTscEnableRecordSql;
   cfg.valType = TAOS_CFG_VTYPE_INT32;
   cfg.cfgType = TSDB_CFG_CTYPE_B_CONFIG;

src/common/src/tname.c

@@ -39,6 +39,13 @@ char* extractDBName(const char* tableId, char* name) {
   return strncpy(name, &tableId[offset1 + 1], len);
 }
 
+size_t tableIdPrefix(const char* name, char* prefix, int32_t len) {
+  tstrncpy(prefix, name, len);
+  strcat(prefix, TS_PATH_DELIMITER);
+
+  return strlen(prefix);
+}
+
 SSchema tGetTableNameColumnSchema() {
   SSchema s = {0};
   s.bytes = TSDB_TABLE_NAME_LEN - 1 + VARSTR_HEADER_SIZE;
@@ -198,4 +205,4 @@ SSchema tscGetTbnameColumnSchema() {
 
   strcpy(s.name, TSQL_TBNAME_L);
   return s;
-}
\ No newline at end of file
+}

src/connector/jdbc/CMakeLists.txt

@@ -8,7 +8,7 @@ IF (TD_MVN_INSTALLED)
   ADD_CUSTOM_COMMAND(OUTPUT ${JDBC_CMD_NAME}
     POST_BUILD
     COMMAND mvn -Dmaven.test.skip=true install -f ${CMAKE_CURRENT_SOURCE_DIR}/pom.xml
-    COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_SOURCE_DIR}/target/taos-jdbcdriver-2.0.13-dist.jar ${LIBRARY_OUTPUT_PATH}
+    COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_SOURCE_DIR}/target/taos-jdbcdriver-2.0.14-dist.jar ${LIBRARY_OUTPUT_PATH}
     COMMAND mvn -Dmaven.test.skip=true clean -f ${CMAKE_CURRENT_SOURCE_DIR}/pom.xml
     COMMENT "build jdbc driver")
   ADD_CUSTOM_TARGET(${JDBC_TARGET_NAME} ALL WORKING_DIRECTORY ${EXECUTABLE_OUTPUT_PATH} DEPENDS ${JDBC_CMD_NAME})

src/connector/jdbc/deploy-pom.xml

@@ -5,7 +5,7 @@
 
   <groupId>com.taosdata.jdbc</groupId>
   <artifactId>taos-jdbcdriver</artifactId>
-  <version>2.0.13</version>
+  <version>2.0.14</version>
   <packaging>jar</packaging>
 
   <name>JDBCDriver</name>

src/connector/jdbc/pom.xml

@@ -3,7 +3,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.taosdata.jdbc</groupId>
     <artifactId>taos-jdbcdriver</artifactId>
-    <version>2.0.13</version>
+    <version>2.0.14</version>
     <packaging>jar</packaging>
     <name>JDBCDriver</name>
     <url>https://github.com/taosdata/TDengine/tree/master/src/connector/jdbc</url>

src/connector/python/linux/python2/setup.py

@@ -5,7 +5,7 @@ with open("README.md", "r") as fh:
 
 setuptools.setup(
     name="taos",
-    version="2.0.2",
+    version="2.0.3",
     author="Taosdata Inc.",
     author_email="support@taosdata.com",
     description="TDengine python client package",

src/connector/python/linux/python2/taos/__init__.py

@@ -3,7 +3,7 @@ from .connection import TDengineConnection
 from .cursor import TDengineCursor
 
 # Globals
-apilevel = '2.0'
+apilevel = '2.0.3'
 threadsafety = 0
 paramstyle = 'pyformat'
 

src/connector/python/linux/python2/taos/cinterface.py

@@ -81,6 +81,7 @@ def _crow_double_to_python(data, num_of_rows, nbytes=None, micro=False):
 def _crow_binary_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C binary row to python row
     """
+    assert(nbytes is not None)
     if num_of_rows > 0:
         return [ None if ele.value[0:1] == FieldType.C_BINARY_NULL else ele.value.decode('utf-8') for ele in (ctypes.cast(data,  ctypes.POINTER(ctypes.c_char * nbytes)))[:abs(num_of_rows)]]
     else:
@@ -106,6 +107,7 @@ def _crow_nchar_to_python(data, num_of_rows, nbytes=None, micro=False):
 def _crow_binary_to_python_block(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C binary row to python row
     """
+    assert(nbytes is not None)
     res=[]
     if num_of_rows > 0:
         for i in range(abs(num_of_rows)):

src/connector/python/linux/python2/taos/cursor.py

@@ -26,7 +26,7 @@ class TDengineCursor(object):
     """
 
     def __init__(self, connection=None):
-        self._description = None
+        self._description = []
         self._rowcount = -1
         self._connection = None
         self._result = None
@@ -234,7 +234,7 @@ class TDengineCursor(object):
     def _reset_result(self):
         """Reset the result to unused version.
         """
-        self._description = None
+        self._description = []
         self._rowcount = -1
         if self._result is not None:
             CTaosInterface.freeResult(self._result)

src/connector/python/linux/python3/setup.py

@@ -5,7 +5,7 @@ with open("README.md", "r") as fh:
 
 setuptools.setup(
     name="taos",
-    version="2.0.2",
+    version="2.0.3",
     author="Taosdata Inc.",
     author_email="support@taosdata.com",
     description="TDengine python client package",

src/connector/python/linux/python3/taos/__init__.py

@@ -3,7 +3,7 @@ from .connection import TDengineConnection
 from .cursor import TDengineCursor
 
 # Globals
-apilevel = '2.0'
+apilevel = '2.0.3'
 threadsafety = 0
 paramstyle = 'pyformat'
 
@@ -21,4 +21,4 @@ def connect(*args, **kwargs):
 
     @rtype: TDengineConnector
     """
-    return TDengineConnection(*args, **kwargs)
\ No newline at end of file
+    return TDengineConnection(*args, **kwargs)

src/connector/python/linux/python3/taos/cinterface.py

@@ -81,6 +81,7 @@ def _crow_double_to_python(data, num_of_rows, nbytes=None, micro=False):
 def _crow_binary_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C binary row to python row
     """
+    assert(nbytes is not None)
     if num_of_rows > 0:
         return [ None if ele.value[0:1] == FieldType.C_BINARY_NULL else ele.value.decode('utf-8') for ele in (ctypes.cast(data,  ctypes.POINTER(ctypes.c_char * nbytes)))[:abs(num_of_rows)]]
     else:
@@ -106,6 +107,7 @@ def _crow_nchar_to_python(data, num_of_rows, nbytes=None, micro=False):
 def _crow_binary_to_python_block(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C binary row to python row
     """
+    assert(nbytes is not None)
     res=[]
     if num_of_rows > 0:
         for i in range(abs(num_of_rows)):

src/connector/python/linux/python3/taos/cursor.py

@@ -27,7 +27,7 @@ class TDengineCursor(object):
     """
 
     def __init__(self, connection=None):
-        self._description = None
+        self._description = []
         self._rowcount = -1
         self._connection = None
         self._result = None
@@ -242,7 +242,7 @@ class TDengineCursor(object):
     def _reset_result(self):
         """Reset the result to unused version.
         """
-        self._description = None
+        self._description = []
         self._rowcount = -1
         if self._result is not None:
             CTaosInterface.freeResult(self._result)

src/connector/python/windows/python2/setup.py

@@ -5,7 +5,7 @@ with open("README.md", "r") as fh:
 
 setuptools.setup(
     name="taos",
-    version="2.0.2",
+    version="2.0.3",
     author="Taosdata Inc.",
     author_email="support@taosdata.com",
     description="TDengine python client package",

src/connector/python/windows/python2/taos/__init__.py

@@ -3,7 +3,7 @@ from .connection import TDengineConnection
 from .cursor import TDengineCursor
 
 # Globals
-apilevel = '2.0'
+apilevel = '2.0.3'
 threadsafety = 0
 paramstyle = 'pyformat'
 

src/connector/python/windows/python2/taos/cinterface.py

@@ -81,6 +81,7 @@ def _crow_double_to_python(data, num_of_rows, nbytes=None, micro=False):
 def _crow_binary_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C binary row to python row
     """
+    assert(nbytes is not None)
     if num_of_rows > 0:
         return [ None if ele.value[0:1] == FieldType.C_BINARY_NULL else ele.value.decode('utf-8') for ele in (ctypes.cast(data,  ctypes.POINTER(ctypes.c_char * nbytes)))[:abs(num_of_rows)]]
     else:
@@ -106,6 +107,7 @@ def _crow_nchar_to_python(data, num_of_rows, nbytes=None, micro=False):
 def _crow_binary_to_python_block(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C binary row to python row
     """
+    assert(nbytes is not None)
     res=[]
     if num_of_rows > 0:
         for i in range(abs(num_of_rows)):

src/connector/python/windows/python2/taos/cursor.py

@@ -27,7 +27,7 @@ class TDengineCursor(object):
     """
 
     def __init__(self, connection=None):
-        self._description = None
+        self._description = []
         self._rowcount = -1
         self._connection = None
         self._result = None
@@ -193,7 +193,7 @@ class TDengineCursor(object):
     def _reset_result(self):
         """Reset the result to unused version.
         """
-        self._description = None
+        self._description = []
         self._rowcount = -1
         if self._result is not None:
             CTaosInterface.freeResult(self._result)

src/connector/python/windows/python3/setup.py

@@ -5,7 +5,7 @@ with open("README.md", "r") as fh:
 
 setuptools.setup(
     name="taos",
-    version="2.0.2",
+    version="2.0.3",
     author="Taosdata Inc.",
     author_email="support@taosdata.com",
     description="TDengine python client package",

src/connector/python/windows/python3/taos/__init__.py

@@ -3,7 +3,7 @@ from .connection import TDengineConnection
 from .cursor import TDengineCursor
 
 # Globals
-apilevel = '2.0'
+apilevel = '2.0.3'
 threadsafety = 0
 paramstyle = 'pyformat'
 

src/connector/python/windows/python3/taos/cinterface.py

@@ -81,6 +81,7 @@ def _crow_double_to_python(data, num_of_rows, nbytes=None, micro=False):
 def _crow_binary_to_python(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C binary row to python row
     """
+    assert(nbytes is not None)
     if num_of_rows > 0:
         return [ None if ele.value[0:1] == FieldType.C_BINARY_NULL else ele.value.decode('utf-8') for ele in (ctypes.cast(data,  ctypes.POINTER(ctypes.c_char * nbytes)))[:abs(num_of_rows)]]
     else:
@@ -108,6 +109,7 @@ def _crow_nchar_to_python(data, num_of_rows, nbytes=None, micro=False):
 def _crow_binary_to_python_block(data, num_of_rows, nbytes=None, micro=False):
     """Function to convert C binary row to python row
     """
+    assert(nbytes is not None)
     res=[]
     if num_of_rows > 0:
         for i in range(abs(num_of_rows)):

src/connector/python/windows/python3/taos/cursor.py

@@ -28,7 +28,7 @@ class TDengineCursor(object):
     """
 
     def __init__(self, connection=None):
-        self._description = None
+        self._description = []
         self._rowcount = -1
         self._connection = None
         self._result = None
@@ -194,7 +194,7 @@ class TDengineCursor(object):
     def _reset_result(self):
         """Reset the result to unused version.
         """
-        self._description = None
+        self._description = []
         self._rowcount = -1
         if self._result is not None:
             CTaosInterface.freeResult(self._result)

src/cq/src/cqMain.c

@@ -40,15 +40,14 @@
 
 typedef struct {
   int32_t  vgId;
+  int32_t  master;
+  int32_t  num;      // number of continuous streams
   char     user[TSDB_USER_LEN];
   char     pass[TSDB_PASSWORD_LEN];
   char     db[TSDB_DB_NAME_LEN];
   FCqWrite cqWrite;
-  void    *ahandle;
-  int32_t  num;      // number of continuous streams
   struct SCqObj *pHead;
   void    *dbConn;
-  int32_t  master;
   void    *tmrCtrl;
   pthread_mutex_t mutex;
 } SCqContext;
@@ -70,6 +69,9 @@ static void cqProcessStreamRes(void *param, TAOS_RES *tres, TAOS_ROW row);
 static void cqCreateStream(SCqContext *pContext, SCqObj *pObj);
 
 void *cqOpen(void *ahandle, const SCqCfg *pCfg) {
+  if (tsEnableStream == 0) {
+    return NULL;
+  }
   SCqContext *pContext = calloc(sizeof(SCqContext), 1);
   if (pContext == NULL) {
     terrno = TAOS_SYSTEM_ERROR(errno);
@@ -90,7 +92,6 @@ void *cqOpen(void *ahandle, const SCqCfg *pCfg) {
   tstrncpy(pContext->db, db, sizeof(pContext->db));
   pContext->vgId = pCfg->vgId;
   pContext->cqWrite = pCfg->cqWrite;
-  pContext->ahandle = ahandle;
   tscEmbedded = 1;
 
   pthread_mutex_init(&pContext->mutex, NULL);
@@ -101,6 +102,9 @@ void *cqOpen(void *ahandle, const SCqCfg *pCfg) {
 }
 
 void cqClose(void *handle) {
+  if (tsEnableStream == 0) {
+    return;
+  }
   SCqContext *pContext = handle;
   if (handle == NULL) return;
 
@@ -131,6 +135,9 @@ void cqClose(void *handle) {
 }
 
 void cqStart(void *handle) {
+  if (tsEnableStream == 0) {
+    return;
+  }
   SCqContext *pContext = handle;
   if (pContext->dbConn || pContext->master) return;
 
@@ -149,6 +156,9 @@ void cqStart(void *handle) {
 }
 
 void cqStop(void *handle) {
+  if (tsEnableStream == 0) {
+    return;
+  }
   SCqContext *pContext = handle;
   cInfo("vgId:%d, stop all CQs", pContext->vgId);
   if (pContext->dbConn == NULL || pContext->master == 0) return;
@@ -176,6 +186,9 @@ void cqStop(void *handle) {
 }
 
 void *cqCreate(void *handle, uint64_t uid, int32_t tid, char *sqlStr, STSchema *pSchema) {
+  if (tsEnableStream == 0) {
+    return NULL;
+  }
   SCqContext *pContext = handle;
 
   SCqObj *pObj = calloc(sizeof(SCqObj), 1);
@@ -205,6 +218,9 @@ void *cqCreate(void *handle, uint64_t uid, int32_t tid, char *sqlStr, STSchema *
 }
 
 void cqDrop(void *handle) {
+  if (tsEnableStream == 0) {
+    return;
+  }
   SCqObj *pObj = handle;
   SCqContext *pContext = pObj->pContext;
 
@@ -241,8 +257,12 @@ static void doCreateStream(void *param, TAOS_RES *result, int32_t code) {
   SCqObj* pObj = (SCqObj*)param;
   SCqContext* pContext = pObj->pContext;
   SSqlObj* pSql = (SSqlObj*)result;
-  pContext->dbConn = pSql->pTscObj;
+  if (atomic_val_compare_exchange_ptr(&(pContext->dbConn), NULL, pSql->pTscObj) != NULL) {
+    taos_close(pSql->pTscObj);
+  }
+  pthread_mutex_lock(&pContext->mutex);
   cqCreateStream(pContext, pObj);
+  pthread_mutex_unlock(&pContext->mutex);
 }
 
 static void cqProcessCreateTimer(void *param, void *tmrId) {
@@ -253,7 +273,9 @@ static void cqProcessCreateTimer(void *param, void *tmrId) {
     cDebug("vgId:%d, try connect to TDengine", pContext->vgId);
     taos_connect_a(NULL, pContext->user, pContext->pass, pContext->db, 0, doCreateStream, param, NULL);
   } else {
+    pthread_mutex_lock(&pContext->mutex);
     cqCreateStream(pContext, pObj);
+    pthread_mutex_unlock(&pContext->mutex);
   }
 }
 
@@ -267,12 +289,14 @@ static void cqCreateStream(SCqContext *pContext, SCqObj *pObj) {
   }
   pObj->tmrId = 0;
 
-  pObj->pStream = taos_open_stream(pContext->dbConn, pObj->sqlStr, cqProcessStreamRes, 0, pObj, NULL);
-  if (pObj->pStream) {
-    pContext->num++;
-    cInfo("vgId:%d, id:%d CQ:%s is openned", pContext->vgId, pObj->tid, pObj->sqlStr);
-  } else {
-    cError("vgId:%d, id:%d CQ:%s, failed to open", pContext->vgId, pObj->tid, pObj->sqlStr);
+  if (pObj->pStream == NULL) {
+    pObj->pStream = taos_open_stream(pContext->dbConn, pObj->sqlStr, cqProcessStreamRes, 0, pObj, NULL);
+    if (pObj->pStream) {
+      pContext->num++;
+      cInfo("vgId:%d, id:%d CQ:%s is openned", pContext->vgId, pObj->tid, pObj->sqlStr);
+    } else {
+      cError("vgId:%d, id:%d CQ:%s, failed to open", pContext->vgId, pObj->tid, pObj->sqlStr);
+    }
   }
 }
 
@@ -334,7 +358,7 @@ static void cqProcessStreamRes(void *param, TAOS_RES *tres, TAOS_ROW row) {
   pHead->version = 0;
 
   // write into vnode write queue
-  pContext->cqWrite(pContext->ahandle, pHead, TAOS_QTYPE_CQ, NULL);
+  pContext->cqWrite(pContext->vgId, pHead, TAOS_QTYPE_CQ, NULL);
   free(buffer);
 }
 

src/cq/test/cqtest.c

@@ -24,7 +24,7 @@
 int64_t  ver = 0;
 void    *pCq = NULL;
 
-int writeToQueue(void *pVnode, void *data, int type, void *pMsg) { 
+int writeToQueue(int32_t vgId, void *data, int type, void *pMsg) { 
   return 0;
 }
 

src/dnode/CMakeLists.txt

@@ -12,7 +12,7 @@ AUX_SOURCE_DIRECTORY(src SRC)
 
 IF (TD_LINUX)
   ADD_EXECUTABLE(taosd ${SRC})
-  TARGET_LINK_LIBRARIES(taosd mnode monitor http tsdb twal vnode cJson lz4)
+  TARGET_LINK_LIBRARIES(taosd mnode monitor http tsdb twal vnode cJson lz4 balance sync)
 
   IF (TD_SOMODE_STATIC)
     TARGET_LINK_LIBRARIES(taosd taos_static)
@@ -32,10 +32,6 @@ IF (TD_LINUX)
     TARGET_LINK_LIBRARIES(taosd mqtt)
   ENDIF ()
 
-  IF (TD_SYNC)
-    TARGET_LINK_LIBRARIES(taosd balance sync)
-  ENDIF ()
-
   SET(PREPARE_ENV_CMD "prepare_env_cmd")
   SET(PREPARE_ENV_TARGET "prepare_env_target")
   ADD_CUSTOM_COMMAND(OUTPUT ${PREPARE_ENV_CMD}

src/dnode/inc/dnodeCfg.h

@@ -19,6 +19,7 @@
 #ifdef __cplusplus
 extern "C" {
 #endif
+#include "dnodeInt.h"
 
 int32_t dnodeInitCfg();
 void    dnodeCleanupCfg();

src/dnode/inc/dnodeCheck.h

@@ -19,6 +19,7 @@
 #ifdef __cplusplus
 extern "C" {
 #endif
+#include "dnodeInt.h"
 
 int32_t dnodeInitCheck();
 void    dnodeCleanupCheck();

src/dnode/inc/dnodeEps.h

@@ -19,8 +19,7 @@
 #ifdef __cplusplus
 extern "C" {
 #endif
-
-#include "taosmsg.h"
+#include "dnodeInt.h"
 
 int32_t dnodeInitEps();
 void    dnodeCleanupEps();

src/dnode/inc/dnodeInt.h

@@ -19,8 +19,13 @@
 #ifdef __cplusplus
 extern "C" {
 #endif
-
+#include "taoserror.h"
+#include "taosmsg.h"
 #include "tlog.h"
+#include "trpc.h"
+#include "tglobal.h"
+#include "dnode.h"
+#include "vnode.h"
 
 extern int32_t dDebugFlag;
 

src/dnode/inc/dnodeMInfos.h

@@ -19,16 +19,19 @@
 #ifdef __cplusplus
 extern "C" {
 #endif
-
-#include "taosmsg.h"
+#include "dnodeInt.h"
 
 int32_t dnodeInitMInfos();
 void    dnodeCleanupMInfos();
-void    dnodeUpdateMInfos(SMnodeInfos *minfos);
-void    dnodeUpdateEpSetForPeer(SRpcEpSet *epSet);
-void    dnodeGetMInfos(SMnodeInfos *minfos);
+void    dnodeUpdateMInfos(SMInfos *pMinfos);
+void    dnodeUpdateEpSetForPeer(SRpcEpSet *pEpSet);
+void    dnodeGetMInfos(SMInfos *pMinfos);
 bool    dnodeIsMasterEp(char *ep);
 
+void    dnodeSendRedirectMsg(SRpcMsg *rpcMsg, bool forShell);
+void    dnodeGetEpSetForPeer(SRpcEpSet *epSet);
+void    dnodeGetEpSetForShell(SRpcEpSet *epSet);
+
 #ifdef __cplusplus
 }
 #endif

src/dnode/inc/dnodeMPeer.h

@@ -19,6 +19,7 @@
 #ifdef __cplusplus
 extern "C" {
 #endif
+#include "dnodeInt.h"
 
 int32_t dnodeInitMPeer();
 void    dnodeCleanupMPeer();

src/dnode/inc/dnodeMRead.h

@@ -19,6 +19,7 @@
 #ifdef __cplusplus
 extern "C" {
 #endif
+#include "dnodeInt.h"
 
 int32_t dnodeInitMRead();
 void    dnodeCleanupMRead();

src/dnode/inc/dnodeMWrite.h

@@ -19,6 +19,7 @@
 #ifdef __cplusplus
 extern "C" {
 #endif
+#include "dnodeInt.h"
 
 int32_t dnodeInitMWrite();
 void    dnodeCleanupMWrite();

src/dnode/inc/dnodeMain.h

@@ -19,6 +19,7 @@
 #ifdef __cplusplus
 extern "C" {
 #endif
+#include "dnodeInt.h"
 
 int32_t dnodeInitSystem();
 void    dnodeCleanUpSystem();

src/dnode/inc/dnodeModule.h

@@ -19,6 +19,7 @@
 #ifdef __cplusplus
 extern "C" {
 #endif
+#include "dnodeInt.h"
 
 int32_t dnodeInitModules();
 void    dnodeStartModules();

src/dnode/inc/dnodePeer.h

@@ -19,6 +19,7 @@
 #ifdef __cplusplus
 extern "C" {
 #endif
+#include "dnodeInt.h"
 
 int32_t dnodeInitServer();
 void    dnodeCleanupServer();

src/dnode/inc/dnodeShell.h

@@ -19,6 +19,7 @@
 #ifdef __cplusplus
 extern "C" {
 #endif
+#include "dnodeInt.h"
 
 int32_t dnodeInitShell();
 void    dnodeCleanupShell();

src/dnode/inc/dnodeStep.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_DNODE_STEP_H
+#define TDENGINE_DNODE_STEP_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+#include "dnodeInt.h"
+
+int32_t dnodeStepInit(SStep *pSteps, int32_t stepSize);
+void    dnodeStepCleanup(SStep *pSteps, int32_t stepSize);
+void    dnodeReportStep(char *name, char *desc, int8_t finished);
+void    dnodeSendStartupStep(SRpcMsg *pMsg);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
\ No newline at end of file

src/dnode/inc/dnodeTelemetry.h

@@ -19,6 +19,7 @@
 #ifdef __cplusplus
 extern "C" {
 #endif
+#include "dnodeInt.h"
 
 int32_t dnodeInitTelemetry();
 void    dnodeCleanupTelemetry();

src/dnode/inc/dnodeVMgmt.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_DNODE_VMGMT_H
+#define TDENGINE_DNODE_VMGMT_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+#include "dnodeInt.h"
+
+int32_t dnodeInitVMgmt();
+void    dnodeCleanupVMgmt();
+void    dnodeDispatchToVMgmtQueue(SRpcMsg *rpcMsg);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
\ No newline at end of file

src/dnode/inc/dnodeVRead.h

@@ -19,6 +19,7 @@
 #ifdef __cplusplus
 extern "C" {
 #endif
+#include "dnodeInt.h"
 
 int32_t dnodeInitVRead();
 void    dnodeCleanupVRead();

src/dnode/inc/dnodeVWrite.h

@@ -19,6 +19,7 @@
 #ifdef __cplusplus
 extern "C" {
 #endif
+#include "dnodeInt.h"
 
 int32_t dnodeInitVWrite();
 void    dnodeCleanupVWrite();

src/dnode/inc/dnodeVnodes.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_DNODE_VNODES_H
+#define TDENGINE_DNODE_VNODES_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+#include "dnodeInt.h"
+
+int32_t dnodeInitVnodes();
+void    dnodeCleanupVnodes();
+int32_t dnodeInitTimer();
+void    dnodeCleanupTimer();
+void    dnodeSendStatusMsgToMnode();
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
\ No newline at end of file

src/dnode/src/dnodeCfg.c

@@ -16,9 +16,6 @@
 #define _DEFAULT_SOURCE
 #include "os.h"
 #include "cJSON.h"
-#include "tglobal.h"
-#include "dnode.h"
-#include "dnodeInt.h"
 #include "dnodeCfg.h"
 
 static SDnodeCfg tsCfg = {0};

src/dnode/src/dnodeCheck.c

@@ -15,8 +15,6 @@
 
 #define _DEFAULT_SOURCE
 #include "os.h"
-#include "tglobal.h"
-#include "dnodeInt.h"
 #include "dnodeCheck.h"
 
 typedef struct {

src/dnode/src/dnodeEps.c

@@ -16,10 +16,7 @@
 #define _DEFAULT_SOURCE
 #include "os.h"
 #include "cJSON.h"
-#include "tglobal.h"
 #include "hash.h"
-#include "dnode.h"
-#include "dnodeInt.h"
 #include "dnodeEps.h"
 
 static SDnodeEps *tsEps = NULL;
@@ -236,7 +233,14 @@ PRASE_EPS_OVER:
   dnodeResetEps(eps);
   if (eps) free(eps);
 
+#if 0
   dnodeUpdateEp(dnodeGetDnodeId(), tsLocalEp, tsLocalFqdn, &tsServerPort);
+#else
+  if (dnodeCheckEpChanged(dnodeGetDnodeId(), tsLocalEp)) {
+    dError("dnode:%d, localEp is changed to %s in dnodeEps.json and need reconfigured", dnodeGetDnodeId(), tsLocalEp);
+    return -1;
+  }
+#endif
 
   terrno = 0;
   return 0;

src/dnode/src/dnodeMInfos.c

@@ -16,18 +16,15 @@
 #define _DEFAULT_SOURCE
 #include "os.h"
 #include "cJSON.h"
-#include "tglobal.h"
 #include "mnode.h"
-#include "dnode.h"
-#include "dnodeInt.h"
 #include "dnodeMInfos.h"
 
-static SMnodeInfos tsMInfos;
-static SRpcEpSet   tsMEpSet;
+static SMInfos   tsMInfos;
+static SRpcEpSet tsMEpSet;
 static pthread_mutex_t tsMInfosMutex;
 
-static void    dnodeResetMInfos(SMnodeInfos *minfos);
-static void    dnodePrintMInfos(SMnodeInfos *minfos);
+static void    dnodeResetMInfos(SMInfos *minfos);
+static void    dnodePrintMInfos(SMInfos *minfos);
 static int32_t dnodeReadMInfos();
 static int32_t dnodeWriteMInfos();
 
@@ -44,14 +41,14 @@ int32_t dnodeInitMInfos() {
 
 void dnodeCleanupMInfos() { pthread_mutex_destroy(&tsMInfosMutex); }
 
-void dnodeUpdateMInfos(SMnodeInfos *minfos) {
-  if (minfos->mnodeNum <= 0 || minfos->mnodeNum > 3) {
-    dError("invalid mnode infos, mnodeNum:%d", minfos->mnodeNum);
+void dnodeUpdateMInfos(SMInfos *pMinfos) {
+  if (pMinfos->mnodeNum <= 0 || pMinfos->mnodeNum > 3) {
+    dError("invalid mnode infos, mnodeNum:%d", pMinfos->mnodeNum);
     return;
   }
 
-  for (int32_t i = 0; i < minfos->mnodeNum; ++i) {
-    SMnodeInfo *minfo = &minfos->mnodeInfos[i];
+  for (int32_t i = 0; i < pMinfos->mnodeNum; ++i) {
+    SMInfo *minfo = &pMinfos->mnodeInfos[i];
     minfo->mnodeId = htonl(minfo->mnodeId);
     if (minfo->mnodeId <= 0 || strlen(minfo->mnodeEp) <= 5) {
       dError("invalid mnode info:%d, mnodeId:%d mnodeEp:%s", i, minfo->mnodeId, minfo->mnodeEp);
@@ -60,14 +57,14 @@ void dnodeUpdateMInfos(SMnodeInfos *minfos) {
   }
 
   pthread_mutex_lock(&tsMInfosMutex);
-  if (minfos->mnodeNum != tsMInfos.mnodeNum) {
-    dnodeResetMInfos(minfos);
+  if (pMinfos->mnodeNum != tsMInfos.mnodeNum) {
+    dnodeResetMInfos(pMinfos);
     dnodeWriteMInfos();
     sdbUpdateAsync();
   } else {
-    int32_t size = sizeof(SMnodeInfos);
-    if (memcmp(minfos, &tsMInfos, size) != 0) {
-      dnodeResetMInfos(minfos);
+    int32_t size = sizeof(SMInfos);
+    if (memcmp(pMinfos, &tsMInfos, size) != 0) {
+      dnodeResetMInfos(pMinfos);
       dnodeWriteMInfos();
       sdbUpdateAsync();
     }
@@ -99,11 +96,11 @@ bool dnodeIsMasterEp(char *ep) {
   return isMaster;
 }
 
-void dnodeGetMInfos(SMnodeInfos *minfos) {
+void dnodeGetMInfos(SMInfos *pMinfos) {
   pthread_mutex_lock(&tsMInfosMutex);
-  memcpy(minfos, &tsMInfos, sizeof(SMnodeInfos));
+  memcpy(pMinfos, &tsMInfos, sizeof(SMInfos));
   for (int32_t i = 0; i < tsMInfos.mnodeNum; ++i) {
-    minfos->mnodeInfos[i].mnodeId = htonl(tsMInfos.mnodeInfos[i].mnodeId);
+    pMinfos->mnodeInfos[i].mnodeId = htonl(tsMInfos.mnodeInfos[i].mnodeId);
   }
   pthread_mutex_unlock(&tsMInfosMutex);
 }
@@ -123,15 +120,15 @@ void dnodeGetEpSetForShell(SRpcEpSet *epSet) {
   pthread_mutex_unlock(&tsMInfosMutex);
 }
 
-static void dnodePrintMInfos(SMnodeInfos *minfos) {
-  dInfo("print mnode infos, mnodeNum:%d inUse:%d", minfos->mnodeNum, minfos->inUse);
-  for (int32_t i = 0; i < minfos->mnodeNum; i++) {
-    dInfo("mnode index:%d, %s", minfos->mnodeInfos[i].mnodeId, minfos->mnodeInfos[i].mnodeEp);
+static void dnodePrintMInfos(SMInfos *pMinfos) {
+  dInfo("print minfos, mnodeNum:%d inUse:%d", pMinfos->mnodeNum, pMinfos->inUse);
+  for (int32_t i = 0; i < pMinfos->mnodeNum; i++) {
+    dInfo("mnode index:%d, %s", pMinfos->mnodeInfos[i].mnodeId, pMinfos->mnodeInfos[i].mnodeEp);
   }
 }
 
-static void dnodeResetMInfos(SMnodeInfos *minfos) {
-  if (minfos == NULL) {
+static void dnodeResetMInfos(SMInfos *pMinfos) {
+  if (pMinfos == NULL) {
     tsMEpSet.numOfEps = 1;
     taosGetFqdnPortFromEp(tsFirst, tsMEpSet.fqdn[0], &tsMEpSet.port[0]);
 
@@ -142,10 +139,10 @@ static void dnodeResetMInfos(SMnodeInfos *minfos) {
     return;
   }
 
-  if (minfos->mnodeNum == 0) return;
+  if (pMinfos->mnodeNum == 0) return;
 
-  int32_t size = sizeof(SMnodeInfos);
-  memcpy(&tsMInfos, minfos, size);
+  int32_t size = sizeof(SMInfos);
+  memcpy(&tsMInfos, pMinfos, size);
 
   tsMEpSet.inUse = tsMInfos.inUse;
   tsMEpSet.numOfEps = tsMInfos.mnodeNum;
@@ -153,16 +150,17 @@ static void dnodeResetMInfos(SMnodeInfos *minfos) {
     taosGetFqdnPortFromEp(tsMInfos.mnodeInfos[i].mnodeEp, tsMEpSet.fqdn[i], &tsMEpSet.port[i]);
   }
 
-  dnodePrintMInfos(minfos);
+  dnodePrintMInfos(pMinfos);
 }
 
 static int32_t dnodeReadMInfos() {
-  int32_t     len = 0;
-  int32_t     maxLen = 2000;
-  char *      content = calloc(1, maxLen + 1);
-  cJSON *     root = NULL;
-  FILE *      fp = NULL;
-  SMnodeInfos minfos = {0};
+  int32_t len = 0;
+  int32_t maxLen = 2000;
+  char *  content = calloc(1, maxLen + 1);
+  cJSON * root = NULL;
+  FILE *  fp = NULL;
+  SMInfos minfos = {0};
+  bool    nodeChanged = false;
 
   char file[TSDB_FILENAME_LEN + 20] = {0};
   sprintf(file, "%s/mnodeEpSet.json", tsDnodeDir);
@@ -221,14 +219,19 @@ static int32_t dnodeReadMInfos() {
       dError("failed to read mnodeEpSet.json, nodeId not found");
       goto PARSE_MINFOS_OVER;
     }
-    minfos.mnodeInfos[i].mnodeId = nodeId->valueint;
 
     cJSON *nodeEp = cJSON_GetObjectItem(nodeInfo, "nodeEp");
     if (!nodeEp || nodeEp->type != cJSON_String || nodeEp->valuestring == NULL) {
       dError("failed to read mnodeEpSet.json, nodeName not found");
       goto PARSE_MINFOS_OVER;
     }
-    strncpy(minfos.mnodeInfos[i].mnodeEp, nodeEp->valuestring, TSDB_EP_LEN);
+
+    SMInfo *pMinfo = &minfos.mnodeInfos[i];
+    pMinfo->mnodeId = nodeId->valueint;
+    tstrncpy(pMinfo->mnodeEp, nodeEp->valuestring, TSDB_EP_LEN);
+
+    bool changed = dnodeCheckEpChanged(pMinfo->mnodeId, pMinfo->mnodeEp);
+    if (changed) nodeChanged = changed;
   }
 
   dInfo("read file %s successed", file);
@@ -241,10 +244,15 @@ PARSE_MINFOS_OVER:
   terrno = 0;
 
   for (int32_t i = 0; i < minfos.mnodeNum; ++i) {
-    SMnodeInfo *mInfo = &minfos.mnodeInfos[i];
+    SMInfo *mInfo = &minfos.mnodeInfos[i];
     dnodeUpdateEp(mInfo->mnodeId, mInfo->mnodeEp, NULL, NULL);
   }
   dnodeResetMInfos(&minfos);
+
+  if (nodeChanged) {
+    dnodeWriteMInfos();
+  }
+
   return 0;
 }
 
@@ -286,3 +294,25 @@ static int32_t dnodeWriteMInfos() {
   dInfo("successed to write %s", file);
   return 0;
 }
+
+void dnodeSendRedirectMsg(SRpcMsg *rpcMsg, bool forShell) {
+  SRpcConnInfo connInfo = {0};
+  rpcGetConnInfo(rpcMsg->handle, &connInfo);
+
+  SRpcEpSet epSet = {0};
+  if (forShell) {
+    dnodeGetEpSetForShell(&epSet);
+  } else {
+    dnodeGetEpSetForPeer(&epSet);
+  }
+
+  dDebug("msg:%s will be redirected, dnodeIp:%s user:%s, numOfEps:%d inUse:%d", taosMsg[rpcMsg->msgType],
+         taosIpStr(connInfo.clientIp), connInfo.user, epSet.numOfEps, epSet.inUse);
+
+  for (int32_t i = 0; i < epSet.numOfEps; ++i) {
+    dDebug("mnode index:%d %s:%d", i, epSet.fqdn[i], epSet.port[i]);
+    epSet.port[i] = htons(epSet.port[i]);
+  }
+
+  rpcSendRedirectRsp(rpcMsg->handle, &epSet);
+}
\ No newline at end of file

src/dnode/src/dnodeMPeer.c

@@ -15,16 +15,11 @@
 
 #define _DEFAULT_SOURCE
 #include "os.h"
-#include "taoserror.h"
-#include "taosmsg.h"
-#include "tutil.h"
 #include "tqueue.h"
 #include "twal.h"
-#include "tglobal.h"
 #include "mnode.h"
-#include "dnode.h"
-#include "dnodeInt.h"
-#include "dnodeMgmt.h"
+#include "dnodeVMgmt.h"
+#include "dnodeMInfos.h"
 #include "dnodeMWrite.h"
 
 typedef struct {

src/dnode/src/dnodeMRead.c

@@ -15,16 +15,11 @@
 
 #define _DEFAULT_SOURCE
 #include "os.h"
-#include "taoserror.h"
-#include "taosmsg.h"
-#include "tutil.h"
 #include "tqueue.h"
 #include "twal.h"
-#include "tglobal.h"
 #include "mnode.h"
-#include "dnode.h"
-#include "dnodeInt.h"
-#include "dnodeMgmt.h"
+#include "dnodeVMgmt.h"
+#include "dnodeMInfos.h"
 #include "dnodeMRead.h"
 
 typedef struct {

src/dnode/src/dnodeMWrite.c

@@ -15,17 +15,11 @@
 
 #define _DEFAULT_SOURCE
 #include "os.h"
-#include "taoserror.h"
-#include "taosmsg.h"
-#include "tutil.h"
 #include "ttimer.h"
 #include "tqueue.h"
-#include "twal.h"
-#include "tglobal.h"
 #include "mnode.h"
-#include "dnode.h"
-#include "dnodeInt.h"
-#include "dnodeMgmt.h"
+#include "dnodeVMgmt.h"
+#include "dnodeMInfos.h"
 #include "dnodeMWrite.h"
 
 typedef struct {

src/dnode/src/dnodeMain.c

@@ -16,14 +16,12 @@
 #define _DEFAULT_SOURCE
 #include "os.h"
 #include "taos.h"
-#include "tutil.h"
 #include "tconfig.h"
-#include "tglobal.h"
+#include "tfile.h"
 #include "twal.h"
-#include "trpc.h"
-#include "dnode.h"
-#include "dnodeInt.h"
-#include "dnodeMgmt.h"
+// #include "tfs.h"
+#include "tsync.h"
+#include "dnodeStep.h"
 #include "dnodePeer.h"
 #include "dnodeModule.h"
 #include "dnodeEps.h"
@@ -32,6 +30,8 @@
 #include "dnodeCheck.h"
 #include "dnodeVRead.h"
 #include "dnodeVWrite.h"
+#include "dnodeVMgmt.h"
+#include "dnodeVnodes.h"
 #include "dnodeMRead.h"
 #include "dnodeMWrite.h"
 #include "dnodeMPeer.h"
@@ -44,37 +44,32 @@ static int32_t dnodeInitStorage();
 static void    dnodeCleanupStorage();
 static void    dnodeSetRunStatus(SRunStatus status);
 static void    dnodeCheckDataDirOpenned(char *dir);
-static int32_t dnodeInitComponents();
-static void    dnodeCleanupComponents(int32_t stepId);
 static int     dnodeCreateDir(const char *dir);
 
-typedef struct {
-  const char *const name;
-  int32_t (*init)();
-  void (*cleanup)();
-} SDnodeComponent;
-
-static const SDnodeComponent tsDnodeComponents[] = {
-  {"rpc",       rpcInit,             rpcCleanup},
-  {"storage",   dnodeInitStorage,    dnodeCleanupStorage},
-  {"dnodecfg",  dnodeInitCfg,        dnodeCleanupCfg},
-  {"dnodeeps",  dnodeInitEps,        dnodeCleanupEps},
-  {"globalcfg" ,taosCheckGlobalCfg,  NULL},
-  {"mnodeinfos",dnodeInitMInfos,     dnodeCleanupMInfos},
-  {"wal",       walInit,             walCleanUp},
-  {"check",     dnodeInitCheck,      dnodeCleanupCheck},     // NOTES: dnodeInitCheck must be behind the dnodeinitStorage component !!!
-  {"vread",     dnodeInitVRead,      dnodeCleanupVRead},
-  {"vwrite",    dnodeInitVWrite,     dnodeCleanupVWrite},
-  {"mread",     dnodeInitMRead,      dnodeCleanupMRead},
-  {"mwrite",    dnodeInitMWrite,     dnodeCleanupMWrite},
-  {"mpeer",     dnodeInitMPeer,      dnodeCleanupMPeer},  
-  {"client",    dnodeInitClient,     dnodeCleanupClient},
-  {"server",    dnodeInitServer,     dnodeCleanupServer},
-  {"mgmt",      dnodeInitMgmt,       dnodeCleanupMgmt},
-  {"modules",   dnodeInitModules,    dnodeCleanupModules},
-  {"mgmt-tmr",  dnodeInitMgmtTimer,  dnodeCleanupMgmtTimer},
-  {"shell",     dnodeInitShell,      dnodeCleanupShell},
-  {"telemetry", dnodeInitTelemetry,  dnodeCleanupTelemetry},
+static SStep tsDnodeSteps[] = {
+  {"dnode-tfile",     tfInit,              tfCleanup},
+  {"dnode-rpc",       rpcInit,             rpcCleanup},
+  {"dnode-globalcfg", taosCheckGlobalCfg,  NULL},
+  {"dnode-storage",   dnodeInitStorage,    dnodeCleanupStorage},
+  {"dnode-cfg",       dnodeInitCfg,        dnodeCleanupCfg},
+  {"dnode-eps",       dnodeInitEps,        dnodeCleanupEps},
+  {"dnode-minfos",    dnodeInitMInfos,     dnodeCleanupMInfos},
+  {"dnode-wal",       walInit,             walCleanUp},
+  {"dnode-sync",      syncInit,            syncCleanUp},
+  {"dnode-check",     dnodeInitCheck,      dnodeCleanupCheck},     // NOTES: dnodeInitCheck must be behind the dnodeinitStorage component !!!
+  {"dnode-vread",     dnodeInitVRead,      dnodeCleanupVRead},
+  {"dnode-vwrite",    dnodeInitVWrite,     dnodeCleanupVWrite},
+  {"dnode-vmgmt",     dnodeInitVMgmt,      dnodeCleanupVMgmt},
+  {"dnode-mread",     dnodeInitMRead,      dnodeCleanupMRead},
+  {"dnode-mwrite",    dnodeInitMWrite,     dnodeCleanupMWrite},
+  {"dnode-mpeer",     dnodeInitMPeer,      dnodeCleanupMPeer},  
+  {"dnode-client",    dnodeInitClient,     dnodeCleanupClient},
+  {"dnode-server",    dnodeInitServer,     dnodeCleanupServer},
+  {"dnode-vnodes",    dnodeInitVnodes,     dnodeCleanupVnodes},
+  {"dnode-modules",   dnodeInitModules,    dnodeCleanupModules},
+  {"dnode-tmr",       dnodeInitTimer,      dnodeCleanupTimer},
+  {"dnode-shell",     dnodeInitShell,      dnodeCleanupShell},
+  {"dnode-telemetry", dnodeInitTelemetry,  dnodeCleanupTelemetry},
 };
 
 static int dnodeCreateDir(const char *dir) {
@@ -85,24 +80,14 @@ static int dnodeCreateDir(const char *dir) {
   return 0;
 }
 
-static void dnodeCleanupComponents(int32_t stepId) {
-  for (int32_t i = stepId; i >= 0; i--) {
-    if (tsDnodeComponents[i].cleanup) {
-      (*tsDnodeComponents[i].cleanup)();
-    }
-  }
+static void dnodeCleanupComponents() {
+  int32_t stepSize = sizeof(tsDnodeSteps) / sizeof(SStep);
+  dnodeStepCleanup(tsDnodeSteps, stepSize);
 }
 
 static int32_t dnodeInitComponents() {
-  int32_t code = 0;
-  for (int32_t i = 0; i < sizeof(tsDnodeComponents) / sizeof(tsDnodeComponents[0]); i++) {
-    if (tsDnodeComponents[i].init() != 0) {
-      dnodeCleanupComponents(i);
-      code = -1;
-      break;
-    }
-  }
-  return code;
+  int32_t stepSize = sizeof(tsDnodeSteps) / sizeof(SStep);
+  return dnodeStepInit(tsDnodeSteps, stepSize);
 }
 
 int32_t dnodeInitSystem() {
@@ -149,7 +134,7 @@ int32_t dnodeInitSystem() {
 void dnodeCleanUpSystem() {
   if (dnodeGetRunStatus() != TSDB_RUN_STATUS_STOPPED) {
     dnodeSetRunStatus(TSDB_RUN_STATUS_STOPPED);
-    dnodeCleanupComponents(sizeof(tsDnodeComponents) / sizeof(tsDnodeComponents[0]) - 1);
+    dnodeCleanupComponents();
     taos_cleanup();
     taosCloseLog();
   }

src/dnode/src/dnodeModule.c

@@ -15,15 +15,10 @@
 
 #define _DEFAULT_SOURCE
 #include "os.h"
-#include "taosdef.h"
-#include "taosmsg.h"
-#include "tglobal.h"
 #include "mnode.h"
 #include "http.h"
 #include "tmqtt.h"
 #include "monitor.h"
-#include "dnode.h"
-#include "dnodeInt.h"
 #include "dnodeModule.h"
 
 typedef struct {
@@ -78,10 +73,10 @@ static void dnodeAllocModules() {
 
   tsModule[TSDB_MOD_MONITOR].enable    = (tsEnableMonitorModule == 1);
   tsModule[TSDB_MOD_MONITOR].name      = "monitor";
-  tsModule[TSDB_MOD_MONITOR].initFp    = monitorInitSystem;
-  tsModule[TSDB_MOD_MONITOR].cleanUpFp = monitorCleanUpSystem;
-  tsModule[TSDB_MOD_MONITOR].startFp   = monitorStartSystem;
-  tsModule[TSDB_MOD_MONITOR].stopFp    = monitorStopSystem;
+  tsModule[TSDB_MOD_MONITOR].initFp    = monInitSystem;
+  tsModule[TSDB_MOD_MONITOR].cleanUpFp = monCleanupSystem;
+  tsModule[TSDB_MOD_MONITOR].startFp   = monStartSystem;
+  tsModule[TSDB_MOD_MONITOR].stopFp    = monStopSystem;
   if (tsEnableMonitorModule) {
     dnodeSetModuleStatus(TSDB_MOD_MONITOR);
   }
@@ -147,8 +142,8 @@ void dnodeProcessModuleStatus(uint32_t moduleStatus) {
   }
 }
 
-bool dnodeStartMnode(SMnodeInfos *minfos) {
-  SMnodeInfos *mnodes = minfos;
+bool dnodeStartMnode(SMInfos *pMinfos) {
+  SMInfos *pMnodes = pMinfos;
 
   if (tsModuleStatus & (1 << TSDB_MOD_MNODE)) {
     dDebug("mnode module is already started, module status:%d", tsModuleStatus);
@@ -159,7 +154,7 @@ bool dnodeStartMnode(SMnodeInfos *minfos) {
   dInfo("start mnode module, module status:%d, new status:%d", tsModuleStatus, moduleStatus);
   dnodeProcessModuleStatus(moduleStatus);
 
-  sdbUpdateSync(mnodes);
+  sdbUpdateSync(pMnodes);
 
   return true;
 }

src/dnode/src/dnodePeer.c

@@ -21,15 +21,12 @@
 
 #define _DEFAULT_SOURCE
 #include "os.h"
-#include "taosmsg.h"
-#include "tglobal.h"
 #include "mnode.h"
-#include "dnode.h"
-#include "dnodeInt.h"
-#include "dnodeMgmt.h"
+#include "dnodeVMgmt.h"
 #include "dnodeVWrite.h"
 #include "dnodeMPeer.h"
 #include "dnodeMInfos.h"
+#include "dnodeStep.h"
 
 static void (*dnodeProcessReqMsgFp[TSDB_MSG_TYPE_MAX])(SRpcMsg *);
 static void dnodeProcessReqMsgFromDnode(SRpcMsg *pMsg, SRpcEpSet *);
@@ -44,19 +41,19 @@ int32_t dnodeInitServer() {
   dnodeProcessReqMsgFp[TSDB_MSG_TYPE_MD_ALTER_TABLE]  = dnodeDispatchToVWriteQueue;
   dnodeProcessReqMsgFp[TSDB_MSG_TYPE_MD_DROP_STABLE]  = dnodeDispatchToVWriteQueue;
 
-  dnodeProcessReqMsgFp[TSDB_MSG_TYPE_MD_CREATE_VNODE] = dnodeDispatchToMgmtQueue; 
-  dnodeProcessReqMsgFp[TSDB_MSG_TYPE_MD_ALTER_VNODE]  = dnodeDispatchToMgmtQueue; 
-  dnodeProcessReqMsgFp[TSDB_MSG_TYPE_MD_DROP_VNODE]   = dnodeDispatchToMgmtQueue;
-  dnodeProcessReqMsgFp[TSDB_MSG_TYPE_MD_ALTER_STREAM] = dnodeDispatchToMgmtQueue;
-  dnodeProcessReqMsgFp[TSDB_MSG_TYPE_MD_CONFIG_DNODE] = dnodeDispatchToMgmtQueue;
-  dnodeProcessReqMsgFp[TSDB_MSG_TYPE_MD_CREATE_MNODE] = dnodeDispatchToMgmtQueue;
+  dnodeProcessReqMsgFp[TSDB_MSG_TYPE_MD_CREATE_VNODE] = dnodeDispatchToVMgmtQueue; 
+  dnodeProcessReqMsgFp[TSDB_MSG_TYPE_MD_ALTER_VNODE]  = dnodeDispatchToVMgmtQueue; 
+  dnodeProcessReqMsgFp[TSDB_MSG_TYPE_MD_DROP_VNODE]   = dnodeDispatchToVMgmtQueue;
+  dnodeProcessReqMsgFp[TSDB_MSG_TYPE_MD_ALTER_STREAM] = dnodeDispatchToVMgmtQueue;
+  dnodeProcessReqMsgFp[TSDB_MSG_TYPE_MD_CONFIG_DNODE] = dnodeDispatchToVMgmtQueue;
+  dnodeProcessReqMsgFp[TSDB_MSG_TYPE_MD_CREATE_MNODE] = dnodeDispatchToVMgmtQueue;
 
   dnodeProcessReqMsgFp[TSDB_MSG_TYPE_DM_CONFIG_TABLE] = dnodeDispatchToMPeerQueue;
   dnodeProcessReqMsgFp[TSDB_MSG_TYPE_DM_CONFIG_VNODE] = dnodeDispatchToMPeerQueue;
   dnodeProcessReqMsgFp[TSDB_MSG_TYPE_DM_AUTH]         = dnodeDispatchToMPeerQueue;
   dnodeProcessReqMsgFp[TSDB_MSG_TYPE_DM_GRANT]        = dnodeDispatchToMPeerQueue;
   dnodeProcessReqMsgFp[TSDB_MSG_TYPE_DM_STATUS]       = dnodeDispatchToMPeerQueue;
-  
+
   SRpcInit rpcInit;
   memset(&rpcInit, 0, sizeof(rpcInit));
   rpcInit.localPort    = tsDnodeDnodePort;
@@ -91,8 +88,9 @@ static void dnodeProcessReqMsgFromDnode(SRpcMsg *pMsg, SRpcEpSet *pEpSet) {
     .pCont   = NULL,
     .contLen = 0
   };
-  
+
   if (pMsg->pCont == NULL) return;
+  if (pMsg->msgType == TSDB_MSG_TYPE_NETWORK_TEST) return dnodeSendStartupStep(pMsg);
 
   if (dnodeGetRunStatus() != TSDB_RUN_STATUS_RUNING) {
     rspMsg.code = TSDB_CODE_APP_NOT_READY;
@@ -151,9 +149,9 @@ void dnodeCleanupClient() {
 }
 
 static void dnodeProcessRspFromDnode(SRpcMsg *pMsg, SRpcEpSet *pEpSet) {
-  if (dnodeGetRunStatus() != TSDB_RUN_STATUS_RUNING) {
+  if (dnodeGetRunStatus() == TSDB_RUN_STATUS_STOPPED) {
     if (pMsg == NULL || pMsg->pCont == NULL) return;
-    dDebug("msg:%p is ignored since dnode not running", pMsg);
+    dDebug("msg:%p is ignored since dnode is stopping", pMsg);
     rpcFreeCont(pMsg->pCont);
     return;
   }
@@ -182,6 +180,8 @@ void dnodeSendMsgToDnode(SRpcEpSet *epSet, SRpcMsg *rpcMsg) {
 void dnodeSendMsgToMnodeRecv(SRpcMsg *rpcMsg, SRpcMsg *rpcRsp) {
   SRpcEpSet epSet = {0};
   dnodeGetEpSetForPeer(&epSet);
+
+  assert(tsClientRpc != 0);
   rpcSendRecv(tsClientRpc, &epSet, rpcMsg, rpcRsp);
 }
 

src/dnode/src/dnodeShell.c

@@ -15,20 +15,14 @@
 
 #define _DEFAULT_SOURCE
 #include "os.h"
-#include "taoserror.h"
-#include "taosdef.h"
-#include "taosmsg.h"
-#include "tglobal.h"
-#include "tutil.h"
 #include "http.h"
 #include "mnode.h"
-#include "dnode.h"
-#include "dnodeInt.h"
 #include "dnodeVRead.h"
 #include "dnodeVWrite.h"
 #include "dnodeMRead.h"
 #include "dnodeMWrite.h"
 #include "dnodeShell.h"
+#include "dnodeStep.h"
 
 static void  (*dnodeProcessShellMsgFp[TSDB_MSG_TYPE_MAX])(SRpcMsg *);
 static void    dnodeProcessMsgFromShell(SRpcMsg *pMsg, SRpcEpSet *);
@@ -74,6 +68,8 @@ int32_t dnodeInitShell() {
   dnodeProcessShellMsgFp[TSDB_MSG_TYPE_CM_SHOW]        = dnodeDispatchToMReadQueue;
   dnodeProcessShellMsgFp[TSDB_MSG_TYPE_CM_RETRIEVE]    = dnodeDispatchToMReadQueue;
 
+  dnodeProcessShellMsgFp[TSDB_MSG_TYPE_NETWORK_TEST]   = dnodeSendStartupStep;
+
   int32_t numOfThreads = tsNumOfCores * tsNumOfThreadsPerCore;
   numOfThreads = (int32_t) ((1.0 - tsRatioOfQueryThreads) * numOfThreads / 2.0);
   if (numOfThreads < 1) {
@@ -142,7 +138,23 @@ static void dnodeProcessMsgFromShell(SRpcMsg *pMsg, SRpcEpSet *pEpSet) {
   }
 }
 
+static int32_t dnodeAuthNettestUser(char *user, char *spi, char *encrypt, char *secret, char *ckey) {
+  if (strcmp(user, "nettestinternal") == 0) {
+    char pass[32] = {0};
+    taosEncryptPass((uint8_t *)user, strlen(user), pass);
+    *spi = 0;
+    *encrypt = 0;
+    *ckey = 0;
+    memcpy(secret, pass, TSDB_KEY_LEN);
+    dTrace("nettest user is authorized");
+    return 0;
+  }
+
+  return -1;
+}
+
 static int dnodeRetrieveUserAuthInfo(char *user, char *spi, char *encrypt, char *secret, char *ckey) {
+  if (dnodeAuthNettestUser(user, spi, encrypt, secret, ckey) == 0) return 0;  
   int code = mnodeRetriveAuth(user, spi, encrypt, secret, ckey);
   if (code != TSDB_CODE_APP_NOT_READY) return code;
 
@@ -220,4 +232,4 @@ SStatisInfo dnodeGetStatisInfo() {
   }
 
   return info;
-}
+}
\ No newline at end of file