zhujian86 opened a new issue #5586:
URL: https://github.com/apache/dolphinscheduler/issues/5586
I cannot see any master or worker on the Monitor page when the backend
process instance is still alive on the ds server.
```[ERROR] 2021-06-02 08:53:16.176
org.apache.dolphinscheduler.server.master.registry.ServerNodeManager:[230] -
WorkerGroupListener capture data change and get data failed
org.mybatis.spring.MyBatisSystemException: nested exception is
org.apache.ibatis.exceptions.PersistenceException:
### Error updating database. Cause:
org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain
JDBC Connection; nested exception is
com.alibaba.druid.pool.DataSourceClosedException: dataSource already closed at
Wed Jun 02 08:52:57 CST 2021
### The error may exist in
org/apache/dolphinscheduler/dao/mapper/AlertMapper.java (best guess)
### The error may involve
org.apache.dolphinscheduler.dao.mapper.AlertMapper.insert
### The error occurred while executing an update
### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed
to obtain JDBC Connection; nested exception is
com.alibaba.druid.pool.DataSourceClosedException: dataSource already closed at
Wed Jun 02 08:52:57 CST 2021
at
org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:78)
at
org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:440)
at com.sun.proxy.$Proxy84.insert(Unknown Source)
at
org.mybatis.spring.SqlSessionTemplate.insert(SqlSessionTemplate.java:271)
at
com.baomidou.mybatisplus.core.override.MybatisMapperMethod.execute(MybatisMapperMethod.java:58)
at
com.baomidou.mybatisplus.core.override.MybatisMapperProxy.invoke(MybatisMapperProxy.java:61)
at com.sun.proxy.$Proxy108.insert(Unknown Source)
at
org.apache.dolphinscheduler.dao.AlertDao.saveTaskTimeoutAlert(AlertDao.java:135)
at
org.apache.dolphinscheduler.dao.AlertDao.sendServerStopedAlert(AlertDao.java:102)
at
org.apache.dolphinscheduler.server.master.registry.ServerNodeManager$WorkerGroupNodeListener.dataChanged(ServerNodeManager.java:225)
at
org.apache.dolphinscheduler.service.zk.AbstractListener.childEvent(AbstractListener.java:32)
at
org.apache.curator.framework.recipes.cache.TreeCache$2.apply(TreeCache.java:760)
at
org.apache.curator.framework.recipes.cache.TreeCache$2.apply(TreeCache.java:754)
at
org.apache.curator.framework.listen.ListenerContainer$1.run(ListenerContainer.java:100)
at
org.apache.curator.shaded.com.google.common.util.concurrent.DirectExecutor.execute(DirectExecutor.java:30)
at
org.apache.curator.framework.listen.ListenerContainer.forEach(ListenerContainer.java:92)
at
org.apache.curator.framework.recipes.cache.TreeCache.callListeners(TreeCache.java:753)
at
org.apache.curator.framework.recipes.cache.TreeCache.access$1900(TreeCache.java:75)
at
org.apache.curator.framework.recipes.cache.TreeCache$4.run(TreeCache.java:865)
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at `java.lang.Thread.run(Thread.java:748)`
Caused by: org.apache.ibatis.exceptions.PersistenceException:
### Error updating database. Cause:
org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain
JDBC Connection; nested exception is
com.alibaba.druid.pool.DataSourceClosedException: dataSource already closed at
Wed Jun 02 08:52:57 CST 2021
### The error may exist in
org/apache/dolphinscheduler/dao/mapper/AlertMapper.java (best guess)
### The error may involve
org.apache.dolphinscheduler.dao.mapper.AlertMapper.insert
### The error occurred while executing an update
```
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