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https://issues.apache.org/jira/browse/FLINK-40793?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18129133#comment-18129133
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Martijn Visser commented on FLINK-40793:
----------------------------------------
Five more, two of them on methods not in the list yet
(cancelWhileRestartingShouldWaitForRunningTasks,
testTaskFailureWithFailureEnricherLabels):
https://github.com/apache/flink/actions/runs/38195297569/job/114649148998
(release-2.3, nightly 2026-10-12, Hadoop 3.1.3, JDK 17, two methods)
https://github.com/apache/flink/actions/runs/38336045675/job/115100520225
(master, nightly 2026-10-13, AdaptiveScheduler, JDK 17)
https://dev.azure.com/apache-flink/98463496-1af2-4620-8eab-a2ecc1a2e6fe/_build/results?buildId=80086&view=logs&j=77a9d8e1-d610-59b3-fc2a-4766541e0e33
(master, nightly 2026-10-13, test_cron_azure core, JDK 17)
https://github.com/apache/flink/actions/runs/38499055849/job/115660198369
(release-2.3, nightly 2026-10-14, Java 21)
https://github.com/apache/flink/actions/runs/39187400189/job/117862311890
(release-2.3, push 2026-10-19, Java 17, two methods)
{code}
[ERROR]
org.apache.flink.runtime.scheduler.DefaultSchedulerTest.cancelWhileRestartingShouldWaitForRunningTasks
-- Time elapsed: 0.019 s <<< FAILURE!
org.opentest4j.AssertionFailedError:
expected: CANCELING
but was: FAILED
at
org.apache.flink.runtime.scheduler.DefaultSchedulerTest.cancelWhileRestartingShouldWaitForRunningTasks(DefaultSchedulerTest.java:1112)
{code}
{code}
[ERROR]
org.apache.flink.runtime.scheduler.DefaultSchedulerTest.testExceptionHistoryConcurrentRestart
-- Time elapsed: 0.126 s <<< ERROR!
java.lang.IllegalStateException: A root exception entry should exist if
failureHandlingResult wasn't generated as part of a new error handling cycle.
at
org.apache.flink.runtime.scheduler.SchedulerBase.archiveFromFailureHandlingResult(SchedulerBase.java:776)
at
org.apache.flink.runtime.scheduler.DefaultScheduler.restartTasksWithDelay(DefaultScheduler.java:385)
{code}
That is three in the last seven days, so I'd raise this to Critical. PR #29278
is still waiting for a committer.
> DefaultSchedulerTest is unstable across many test methods
> ---------------------------------------------------------
>
> Key: FLINK-40793
> URL: https://issues.apache.org/jira/browse/FLINK-40793
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Coordination
> Affects Versions: 2.2.2, 2.3.1, 2.4.0
> Reporter: sepuri sai krishna
> Assignee: sepuri sai krishna
> Priority: Major
> Labels: pull-request-available, test-stability
>
> DefaultSchedulerTest failed 17 times in the 90 days to 2026-09-15, in 11
> different test methods, on all core CI profiles (Java 11, 17, 21, Hadoop,
> AdaptiveScheduler). It is not limited to master: the most recent two are
> 2026-09-14 on master and 2026-09-10 on release-2.3.
> Recent runs:
> * https://github.com/apache/flink/actions/runs/34798011374/job/103837976051
> master, testExceptionHistoryWithRestartableFailure
> * https://github.com/apache/flink/actions/runs/34427845031/job/102726173515
> release-2.3, testExceptionHistoryWithRestartableFailure
> * https://github.com/apache/flink/actions/runs/33866786819/job/101007980019
> testExceptionHistoryConcurrentRestart
> * https://github.com/apache/flink/actions/runs/33349433782/job/99360730245
> testJobStatusHookWithJobCanceled
> * https://github.com/apache/flink/actions/runs/32136151763/job/95710148170
> testExceptionHistoryWithGlobalFailOver
> * https://github.com/apache/flink/actions/runs/31662007213/job/94339220821
> testJobStatusHookWithJobFinished
> * https://github.com/apache/flink/actions/runs/30418270959/job/90470994165
> testStartCheckpointOnlyAfterVertexWithBlockingEdgeFinished
> Other failing methods: skipDeploymentIfVertexVersionOutdated,
> testDeploymentWaitForProducedPartitionRegistration,
> failGlobalWhenRestoringStateFails,
> jobStatusIsRestartingIfOneVertexIsWaitingForRestart,
> abortPendingCheckpointsWhenRestartingTasks.
> {code}
> [ERROR]
> org.apache.flink.runtime.scheduler.DefaultSchedulerTest.testJobStatusHookWithJobCanceled
> -- Time elapsed: 0.014 s <<< FAILURE!
> org.opentest4j.AssertionFailedError:
> expected: CANCELED
> but was: FAILED
> at
> org.apache.flink.runtime.scheduler.DefaultSchedulerTest.commonJobStatusHookTest(DefaultSchedulerTest.java:1933)
> at
> org.apache.flink.runtime.scheduler.DefaultSchedulerTest.testJobStatusHookWithJobCanceled(DefaultSchedulerTest.java:1818)
> {code}
> {code}
> [ERROR]
> org.apache.flink.runtime.scheduler.DefaultSchedulerTest.testStartCheckpointOnlyAfterVertexWithBlockingEdgeFinished
> -- Time elapsed: 0.026 s <<< ERROR!
> java.lang.IllegalStateException
> at
> org.apache.flink.util.Preconditions.checkState(Preconditions.java:177)
> at
> org.apache.flink.runtime.scheduler.DefaultSchedulerTest.transitionToRunning(DefaultSchedulerTest.java:2362)
> at
> org.apache.flink.runtime.scheduler.DefaultSchedulerTest.testStartCheckpointOnlyAfterVertexWithBlockingEdgeFinished(DefaultSchedulerTest.java:1877)
> {code}
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