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https://issues.apache.org/jira/browse/FLINK-40009?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Martijn Visser updated FLINK-40009:
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Summary: RescaleTimelineITCase.waitUntilConditionWithTimeout never enforces
its timeout on a ForkJoinPool worker (was: RescaleTimelineITCase)
> RescaleTimelineITCase.waitUntilConditionWithTimeout never enforces its
> timeout on a ForkJoinPool worker
> -------------------------------------------------------------------------------------------------------
>
> Key: FLINK-40009
> URL: https://issues.apache.org/jira/browse/FLINK-40009
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Coordination, Tests
> Affects Versions: 2.4.0
> Reporter: Martijn Visser
> Assignee: Martijn Visser
> Priority: Major
> Labels: test-stability
>
> RescaleTimelineITCase can hang until the CI watchdog kills the fork. A thread
> dump
> from build 76242 showed waitUntilConditionWithTimeout still parked after 978s
> on a
> 20s budget.
> https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=76242&view=results
> (leg: test_cron_jdk11 core)
> Root cause: {{waitUntilConditionWithTimeout}} wrapped an unbounded
> {{CommonTestUtils#waitUntilCondition}} in {{CompletableFuture#runAsync}} and
> bounded
> it with {{get(timeout)}}. When the test runs on a ForkJoinPool worker (JUnit
> 5's test
> executor), {{CompletableFuture#timedGet}} help-executes the async task
> inline, so the
> never-ending poll loop runs on the waiting thread itself and the timeout
> never fires.
> Fix: poll synchronously on the calling thread against a {{Deadline}} so the
> timeout is
> always enforced and no task is leaked into the common pool.
> Related: FLINK-39902, FLINK-39903 (same test class).
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