zhenjiaguo edited a comment on pull request #1468:
URL: https://github.com/apache/incubator-kyuubi/pull/1468#issuecomment-981524463
> can you check the jstack to see which non-daemon thread prevents
termination when an exception occurs?
I use Arthas to see, Non-daemon thread is:
```shell
"SessionTracker" Id=22 TIMED_WAITING on
org.apache.zookeeper.server.SessionTrackerImpl@5344d655
at java.lang.Object.wait(Native Method)
- waiting on org.apache.zookeeper.server.SessionTrackerImpl@5344d655
at
org.apache.zookeeper.server.SessionTrackerImpl.run(SessionTrackerImpl.java:147)
```
Thread states are `TIMED_WAIT`.
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