zengxiaosong opened a new issue, #15108: URL: https://github.com/apache/dolphinscheduler/issues/15108
### 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 启动一个子流程比较复杂的任务后，master总是重复出现数据库连接获取不到的情况。导致新的任务不能启动，需要重启dolphin才行。错误日志如下： ### Error querying database. Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is java.sql.SQLTransientConnectionException: DolphinScheduler - Connection is not available, request timed out after 30000ms. ### The error may exist in class path resource [org/apache/dolphinscheduler/dao/mapper/WorkerGroupMapper.xml] ### The error may involve org.apache.dolphinscheduler.dao.mapper.WorkerGroupMapper.queryAllWorkerGroup ### The error occurred while executing a query ### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is java.sql.SQLTransientConnectionException: DolphinScheduler - Connection is not available, request timed out after 30000ms. at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30) at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:153) at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:145) at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:140) at sun.reflect.GeneratedMethodAccessor352.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:427) ... 34 common frames omitted Caused by: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is java.sql.SQLTransientConnectionException: DolphinScheduler - Connection is not available, request timed out after 30000ms. ### What you expected to happen 如何解决 ### How to reproduce 使用一个复杂，嵌套比较深的子流程任务 ### Anything else 暂时没有 ### Version dev ### 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]
