[ https://issues.apache.org/jira/browse/FLINK-40789?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Martijn Visser reassigned FLINK-40789:
--------------------------------------
Assignee: Naveen Joseph
> RescaleTimelineITCase.testRecordRescaleForNewAvailableResource records three rescales instead of two
> ----------------------------------------------------------------------------------------------------
>
> Key: FLINK-40789
> URL: https://issues.apache.org/jira/browse/FLINK-40789
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Coordination
> Affects Versions: 2.3.1, 2.4.0
> Reporter: Martijn Visser
> Assignee: Naveen Joseph
> Priority: Critical
> Labels: test-stability
>
> https://dev.azure.com/apache-flink/98463496-1af2-4620-8eab-a2ecc1a2e6fe/_build/results?buildId=79368&view=logs&j=0da23115-68bb-5dcd-192c-bd4c8adebde1 (master push 2026-09-23, test_ci core, JDK 17)
> {code}
> [ERROR] org.apache.flink.runtime.scheduler.adaptive.timeline.RescaleTimelineITCase.testRecordRescaleForNewAvailableResource -- Time elapsed: 0.722 s <<< FAILURE!
> java.lang.AssertionError:
> Expected size: 2 but was: 3 in:
> [Rescale{... rescaleAttemptId=3, ... preRescaleParallelism=4, postRescaleParallelism=6 ... triggerCause=NEW_RESOURCE_AVAILABLE, terminalState=COMPLETED ...},
> Rescale{... rescaleAttemptId=2, ... preRescaleParallelism=2, postRescaleParallelism=4 ... triggerCause=NEW_RESOURCE_AVAILABLE, terminalState=COMPLETED ...},
> Rescale{... rescaleAttemptId=1, ... preRescaleParallelism=null, postRescaleParallelism=2 ... triggerCause=INITIAL_SCHEDULE, terminalState=COMPLETED ...}]
> at org.apache.flink.runtime.scheduler.adaptive.timeline.RescaleTimelineITCase.lambda$testRecordRescaleForNewAvailableResource$2(RescaleTimelineITCase.java:170)
> at org.apache.flink.runtime.scheduler.adaptive.timeline.RescaleTimelineITCase.runAdaptedParameterizedAssertion(RescaleTimelineITCase.java:397)
> at org.apache.flink.runtime.scheduler.adaptive.timeline.RescaleTimelineITCase.testRecordRescaleForNewAvailableResource(RescaleTimelineITCase.java:164)
> {code}
> The test expects the initial schedule at parallelism 4 and one upscale to 6 after the third TaskManager starts. Here the job was first scheduled at 2 and went 2 -> 4 -> 6. The other RescaleTimelineITCase methods had similar races fixed in FLINK-40010, FLINK-40067 and FLINK-40076; this method has no ticket.
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