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https://issues.apache.org/jira/browse/FLINK-24505?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17459382#comment-17459382
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Till Rohrmann commented on FLINK-24505:
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[~mapohl] do you know how the bind exceptions can happen?
> org.apache.flink.runtime.leaderelection.ZooKeeperLeaderRetrievalConnectionHandlingTest
> --------------------------------------------------------------------------------------
>
> Key: FLINK-24505
> URL: https://issues.apache.org/jira/browse/FLINK-24505
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Coordination
> Affects Versions: 1.14.0
> Reporter: Matthias Pohl
> Priority: Major
> Labels: stale-major, test-stability
> Attachments: logs-ci_build-test_ci_build_core-1632221898.zip
>
>
> We experienced a test instability on [the VVP Flink 1.14.0
> fork|https://dev.azure.com/ververica-dev/daplatform-flink/_build/results?buildId=1475&view=logs&j=9dc1b5dc-bcfa-5f83-eaa7-0cb181ddc267&t=511d2595-ec54-5ab7-86ce-92f328796f20&l=9473]
> which is caused by a port already being in used by some other test.
> {{ZooKeeperLeaderRetrievalConnectionHandlingTest.testConnectionSuspendedHandling}}
> failed due to this:
> {code}
> Sep 21 11:04:28 [ERROR] Tests run: 5, Failures: 0, Errors: 1, Skipped: 0,
> Time elapsed: 16.018 s <<< FAILURE! - in
> org.apache.flink.runtime.leaderelection.ZooKeeperLeaderRetrievalConnectionHandlingTest
> Sep 21 11:04:28 [ERROR] testConnectionSuspendedHandling Time elapsed: 4.233
> s <<< ERROR!
> Sep 21 11:04:28 java.net.BindException: Address already in use
> Sep 21 11:04:28 at sun.nio.ch.Net.bind0(Native Method)
> Sep 21 11:04:28 at sun.nio.ch.Net.bind(Net.java:461)
> Sep 21 11:04:28 at sun.nio.ch.Net.bind(Net.java:453)
> Sep 21 11:04:28 at
> sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:222)
> Sep 21 11:04:28 at
> sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:85)
> Sep 21 11:04:28 at
> sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:78)
> Sep 21 11:04:28 at
> org.apache.zookeeper.server.NIOServerCnxnFactory.configure(NIOServerCnxnFactory.java:90)
> Sep 21 11:04:28 at
> org.apache.zookeeper.server.ZooKeeperServerMain.runFromConfig(ZooKeeperServerMain.java:120)
> Sep 21 11:04:28 at
> org.apache.curator.test.TestingZooKeeperMain.runFromConfig(TestingZooKeeperMain.java:93)
> Sep 21 11:04:28 at
> org.apache.curator.test.TestingZooKeeperServer$1.run(TestingZooKeeperServer.java:148)
> Sep 21 11:04:28 at java.lang.Thread.run(Thread.java:748)
> {code}
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