[GitHub] [incubator-kyuubi] zhenjiaguo commented on pull request #1468: [KYUUBI #1449] Fix when KyuubiServer initialize fail but not exit

[GitBox <gi...@apache.org>]

zhenjiaguo commented 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 still running thread: 
   ```shell
   "NIOServerCxn.Factory:/192.168.72.190:2181" Id=21 RUNNABLE (in native)
       at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
       at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269)
       at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:93)
       at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86)
       at sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97)
       at org.apache.zookeeper.server.NIOServerCnxnFactory.run(NIOServerCnxnFactory.java:203)
       at java.lang.Thread.run(Thread.java:748)
   ```


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