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https://issues.apache.org/jira/browse/SOLR-18531?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated SOLR-18531:
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Labels: pull-request-available (was: )
> LeaderElectionIntegrationTest fails intermittently with BindException because
> its restart port is taken during the restart gap
> ------------------------------------------------------------------------------------------------------------------------------
>
> Key: SOLR-18531
> URL: https://issues.apache.org/jira/browse/SOLR-18531
> Project: Solr
> Issue Type: Test
> Components: Tests
> Reporter: Nick Shanin
> Priority: Minor
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> AI text below
> h2. What happens
> {\{LeaderElectionIntegrationTest.testSimpleSliceLeaderElection}} fails
> intermittently in CI with a \{{BindException}} ("Address already in use")
> when \{{JettySolrRunner.start}} restarts a node on its pinned port. Seen on
> an apache/solr CI run for an unrelated change: [run
> 37991927523|[https://github.com/apache/solr/actions/runs/37991927523]], seed
> \{{3E3D9FF553211ED6}}.
> h2. Likely mechanism
> The runner releases the port when the node stops and rebinds the same port
> when it starts again. In the gap, a process outside the JVM can take the
> port, and the test framework holds no reservation, so the restart fails. Any
> suite that restarts a \{{JettySolrRunner}} on a fixed port is exposed, not
> only this test.
> h2. Proposed fix
> In the test framework, hold the released port across a restart: reserve it on
> stop and hand it to the start, so the window where another process can take
> it closes.
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