KONGHOA opened a new issue, #16686: URL: https://github.com/apache/dolphinscheduler/issues/16686
### Search before asking - [X] I had searched in the [issues](https://github.com/apache/dolphinscheduler/issues?q=is%3Aissue) and found no similar issues. ### What happened When I use **Apache DolphinScheduler 3.2.2** to schedule **Apache Doris 2.1.5/2.1.6** SQL tasks, the error "no operation allowed after statement closed" frequently occurs. However, this error does not occur when I use **Apache Doris 2.1.2.** Here are the error logs. > Caused by: com.mysql.cj.exceptions.StatementIsClosedException: No operations allowed after statement closed. at sun.reflect.GeneratedConstructorAccessor85.newInstance(Unknown Source) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:423) at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:52) at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:76) at com.mysql.cj.jdbc.StatementImpl.checkClosed(StatementImpl.java:352) at com.mysql.cj.jdbc.ClientPreparedStatement.executeInternal(ClientPreparedStatement.java:933) ... 17 common frames omitted [ERROR] 2024-10-11 10:23:42.739 +0800 - Task execute failed, due to meet an exception org.apache.dolphinscheduler.plugin.task.sql.api.SqlTaskExecutionException: SQL task failed at org.apache.dolphinscheduler.plugin.task.sql.sqlTask.handleTask(SqlTask.java:166) at org.apache.dolphinscheduler.server.worker.runner.DefaultWorkerTaskExecutor.executeTask(DefaultWorkerTaskExecutor.java:51) at org.apache.dolphinscheduler.server.worker.runner.WorkerTaskExecuteThread.run(WorkerTaskExecutor.java:172) 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:750) Caused by: java.sql.SQLException: No operations allowed after statement closed. at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:120) at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:97) at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:89) at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:63) at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:53) at com.mysql.cj.jdbc.ClientPreparedStatement.executeInternal(ClientPreparedStatement.java:933) at com.mysql.cj.jdbc.ClientPreparedStatement.executeQuery(ClientPreparedStatement.java:1045) at org.apache.dolphinscheduler.plugin.task.sql.SqlTask.handleTask(SqlTask.java:327) at org.apache.dolphinscheduler.plugin.task.sql.SqlTask.execute(SqlTask.java:208) at org.apache.dolphinscheduler.plugin.task.api.AbstractTask.dispense(AbstractTask.java:159) ... 17 common frames omitted Caused by: com.mysql.cj.exceptions.StatementIsClosedException: No operations allowed after statement closed. at sun.reflect.GeneratedConstructorAccessor85.newInstance(Unknown Source) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:423) at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:52) at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:76) at com.mysql.cj.jdbc.StatementImpl.checkClosed(StatementImpl.java:352) at com.mysql.cj.jdbc.ClientPreparedStatement.executeInternal(ClientPreparedStatement.java:933) ... 17 common frames omitted The following is the SQL I executed. I tried using both the Doris data source and the MySQL data source, but I couldn't avoid this error. `**SELECT MAX(time) AS max_time FROM mytable;**` ### What you expected to happen I think this error is because the database connection timed out or disconnected during the operation, causing the Statement object to be unavailable. However, I tried adding parameters like autoReconnect and wait_timeout to the database connection, but it didn't work. I saw a similar issue in druid, and here's the link: [druid issues 5262](https://github.com/alibaba/druid/issues/5262) ### How to reproduce You can reproduce the issue using doris2.1.6 and dolphinscheduler 3.2.2. ### Anything else _No response_ ### Version 3.2.x ### Are you willing to submit PR? - [X] Yes I am willing to submit a PR! ### Code of Conduct - [X] I agree to follow this project's [Code of Conduct](https://www.apache.org/foundation/policies/conduct) -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
