Martijn Visser created FLINK-40789:
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Summary:
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: 2.4.0
Reporter: Martijn Visser
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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