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https://issues.apache.org/jira/browse/FLINK-34475?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17818866#comment-17818866
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Matthias Pohl commented on FLINK-34475:
---------------------------------------

There's a server-side error causing the JVM exiting with code 2:
{code}
01:16:27,812 [  zkservermainrunner] ERROR 
org.apache.zookeeper.server.embedded.ZooKeeperServerEmbeddedImpl [] - error 
during server lifecycle
java.net.BindException: Address already in use
        at sun.nio.ch.Net.bind0(Native Method) ~[?:1.8.0_292]
        at sun.nio.ch.Net.bind(Net.java:461) ~[?:1.8.0_292]
        at sun.nio.ch.Net.bind(Net.java:453) ~[?:1.8.0_292]
        at 
sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:222) 
~[?:1.8.0_292]
        at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:85) 
~[?:1.8.0_292]
        at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:78) 
~[?:1.8.0_292]
        at 
org.apache.zookeeper.server.NIOServerCnxnFactory.configure(NIOServerCnxnFactory.java:662)
 ~[zookeeper-3.7.1.jar:3.7.1]
        at 
org.apache.zookeeper.server.ZooKeeperServerMain.runFromConfig(ZooKeeperServerMain.java:160)
 ~[zookeeper-3.7.1.jar:3.7.1]
        at 
org.apache.zookeeper.server.embedded.ZooKeeperServerEmbeddedImpl$4.run(ZooKeeperServerEmbeddedImpl.java:159)
 [zookeeper-3.7.1.jar:3.7.1]
01:16:27,813 [  zkservermainrunner] INFO  
org.apache.zookeeper.server.ZooKeeperServerMain              [] - Connection 
factory did not start
01:16:27,822 [  zkservermainrunner] ERROR 
org.apache.zookeeper.util.ServiceUtils                       [] - Exiting JVM 
with code 2
01:16:27,832 [  zkservermainrunner] INFO  
org.apache.zookeeper.server.embedded.ZooKeeperServerEmbeddedImpl [] - ZK server 
died. Requesting stop on JVM
{code}

> ZooKeeperLeaderElectionDriverTest failed with exit code 2
> ---------------------------------------------------------
>
>                 Key: FLINK-34475
>                 URL: https://issues.apache.org/jira/browse/FLINK-34475
>             Project: Flink
>          Issue Type: Bug
>          Components: Runtime / Coordination
>    Affects Versions: 1.18.1
>            Reporter: Matthias Pohl
>            Priority: Critical
>              Labels: test-stability
>         Attachments: FLINK-34475.log
>
>
> [https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=57649&view=logs&j=0e7be18f-84f2-53f0-a32d-4a5e4a174679&t=7c1d86e3-35bd-5fd5-3b7c-30c126a78702&l=8746]
> {code:java}
> Feb 20 01:20:02 01:20:02.369 [ERROR] Process Exit Code: 2
> Feb 20 01:20:02 01:20:02.369 [ERROR] Crashed tests:
> Feb 20 01:20:02 01:20:02.369 [ERROR] 
> org.apache.flink.runtime.leaderelection.ZooKeeperLeaderElectionDriverTest
> Feb 20 01:20:02 01:20:02.369 [ERROR]  at 
> org.apache.maven.plugin.surefire.booterclient.ForkStarter.fork(ForkStarter.java:748)
> {code}



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