zjffdu opened a new pull request #3644: [ZEPPELIN-4613]. Scheduler thread is not closed properly URL: https://github.com/apache/zeppelin/pull/3644 ### What is this PR for? The root cause is that we didn't shutdown the scheduler thread properly. It is always stuck in the following line ``` runningJob = queue.take(); ``` This PR fix this issue by interrupt that thread. Besidies that I also add more logging in this PR. ### What type of PR is it? [Bug Fix ] ### Todos * [ ] - Task ### What is the Jira issue? * https://issues.apache.org/jira/browse/ZEPPELIN-4613 ### How should this be tested? * CI pass ### Screenshots (if appropriate) ### Questions: * Does the licenses files need update? No * Is there breaking changes for older versions? No * Does this needs documentation? No
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