Martijn Visser created FLINK-40009:
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Summary: RescaleTimelineITCase
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
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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