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https://issues.apache.org/jira/browse/FLINK-34475?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Martijn Visser reopened FLINK-34475:
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Reopening, this is not a one-off. Same bind failure and exit code 2, now in
ZooKeeperLeaderElectionITCase on release-1.20, nightly 2026-10-29
(AdaptiveScheduler, module tests, Java 8):
https://github.com/apache/flink/actions/runs/40803857827/job/123229673188
{code}
02:51:55,272 [ zkservermainrunner] INFO
org.apache.zookeeper.server.NIOServerCnxnFactory [] - binding to port
0.0.0.0/0.0.0.0:34757
02:51:55,273 [ zkservermainrunner] ERROR
org.apache.zookeeper.server.embedded.ZooKeeperServerEmbeddedImpl [] - error
during server lifecycle
java.net.BindException: Address already in use
02:51:55,284 [ zkservermainrunner] ERROR
org.apache.zookeeper.util.ServiceUtils [] - Exiting JVM with code 2
[ERROR] ExecutionException The forked VM terminated without properly saying
goodbye. VM crash or System.exit called?
[ERROR] Process Exit Code: 2
{code}
The fork died in the class setup, before the first test method started.
FLINK-34920 was the same thing in
ZooKeeperLeaderRetrievalConnectionHandlingTest on 1.19, so this is the third
occurrence across three test classes.
> 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, 1.20.6
> Reporter: Matthias Pohl
> Priority: Major
> Labels: test-stability
> Attachments: FLINK-34475.log, FLINK-34475.zookeeper-client.log,
> FLINK-34475.zookeeper-server.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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