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https://issues.apache.org/jira/browse/FLINK-40789?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18133765#comment-18133765
]
Purushottam Sinha commented on FLINK-40789:
-------------------------------------------
One more on master, PR run for apache/flink#29660 on 2026-10-28 (test_ci core,
JDK 17). Same signature as the 2026-10-20 comment: the job starts at
parallelism 4, and the extra rescale is an IGNORED UPDATE_REQUIREMENT:
https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=80666&view=logs&j=0da23115-68bb-5dcd-192c-bd4c8adebde1&t=1ffc5ec2-7913-50ff-0177-3fca16f1b8f0
{code}
[ERROR]
org.apache.flink.runtime.scheduler.adaptive.timeline.RescaleTimelineITCase.testRecordNonTerminatedRescaleMergingWithNewRecoverableFailureTriggerCause
-- Time elapsed: 1.720 s <<< FAILURE!
java.lang.AssertionError:
Expected size: 2 but was: 3 in:
[Rescale{... rescaleAttemptId=2, preRescaleParallelism=4,
postRescaleParallelism=2, triggerCause=RECOVERABLE_FAILOVER,
terminalState=COMPLETED ...},
Rescale{... rescaleAttemptId=1, preRescaleParallelism=4,
postRescaleParallelism=null, triggerCause=UPDATE_REQUIREMENT,
terminalState=IGNORED, terminatedReason=NO_RESOURCES_OR_PARALLELISMS_CHANGE
...},
Rescale{... rescaleAttemptId=1, preRescaleParallelism=null,
postRescaleParallelism=4, triggerCause=INITIAL_SCHEDULE,
terminalState=COMPLETED ...}]
at
org.apache.flink.runtime.scheduler.adaptive.timeline.RescaleTimelineITCase.lambda$testRecordNonTerminatedRescaleMergingWithNewRecoverableFailureTriggerCause$10(RescaleTimelineITCase.java:359)
{code}
> RescaleTimelineITCase.testRecordRescaleForNewAvailableResource records three
> rescales instead of two
> ----------------------------------------------------------------------------------------------------
>
> Key: FLINK-40789
> URL: https://issues.apache.org/jira/browse/FLINK-40789
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Coordination
> Affects Versions: 2.3.1, 2.4.0, 2.5.0
> Reporter: Martijn Visser
> Assignee: Naveen Joseph
> Priority: Critical
> Labels: test-stability
>
> https://dev.azure.com/apache-flink/98463496-1af2-4620-8eab-a2ecc1a2e6fe/_build/results?buildId=79368&view=logs&j=0da23115-68bb-5dcd-192c-bd4c8adebde1
> (master push 2026-09-23, test_ci core, JDK 17)
> {code}
> [ERROR]
> org.apache.flink.runtime.scheduler.adaptive.timeline.RescaleTimelineITCase.testRecordRescaleForNewAvailableResource
> -- Time elapsed: 0.722 s <<< FAILURE!
> java.lang.AssertionError:
> Expected size: 2 but was: 3 in:
> [Rescale{... rescaleAttemptId=3, ... preRescaleParallelism=4,
> postRescaleParallelism=6 ... triggerCause=NEW_RESOURCE_AVAILABLE,
> terminalState=COMPLETED ...},
> Rescale{... rescaleAttemptId=2, ... preRescaleParallelism=2,
> postRescaleParallelism=4 ... triggerCause=NEW_RESOURCE_AVAILABLE,
> terminalState=COMPLETED ...},
> Rescale{... rescaleAttemptId=1, ... preRescaleParallelism=null,
> postRescaleParallelism=2 ... triggerCause=INITIAL_SCHEDULE,
> terminalState=COMPLETED ...}]
> at
> org.apache.flink.runtime.scheduler.adaptive.timeline.RescaleTimelineITCase.lambda$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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