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https://issues.apache.org/jira/browse/FLINK-40887?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18124949#comment-18124949
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Martijn Visser commented on FLINK-40887:
----------------------------------------
Again on master, nightly 2026-10-07 (AdaptiveScheduler profile, JDK 17):
https://github.com/apache/flink/actions/runs/37560828844/job/112601007301
{code}
[ERROR]
org.apache.flink.test.example.failing.TaskFailureITCase.testJobWithoutObjectReuse
-- Time elapsed: 1.054 s <<< FAILURE!
java.lang.AssertionError:
Expecting Optional to contain a value but it was empty.
at
org.apache.flink.test.example.failing.TaskFailureITCase.testProgram(TaskFailureITCase.java:57)
{code}
The test log again has the two "Invalid request" lines from
CollectSinkFunction, one for each attempt.
> TaskFailureITCase.testJobWithoutObjectReuse fails with "Expecting Optional to
> contain a value but it was empty"
> ---------------------------------------------------------------------------------------------------------------
>
> Key: FLINK-40887
> URL: https://issues.apache.org/jira/browse/FLINK-40887
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Coordination
> Affects Versions: 2.2.2, 2.4.0
> Reporter: Martijn Visser
> Assignee: Gautham Sankar V
> Priority: Major
> Labels: test-stability
>
> https://github.com/apache/flink/actions/runs/36954250535/job/110677877340
> (master nightly 2026-10-02, AdaptiveScheduler profile)
> {code}
> [ERROR]
> org.apache.flink.test.example.failing.TaskFailureITCase.testJobWithoutObjectReuse
> -- Time elapsed: 1.338 s <<< FAILURE!
> java.lang.AssertionError:
> Expecting Optional to contain a value but it was empty.
> at
> org.apache.flink.test.example.failing.TaskFailureITCase.testProgram(TaskFailureITCase.java:57)
> at
> org.apache.flink.test.util.JavaProgramTestBase.executeProgramMultipleTimes(JavaProgramTestBase.java:108)
> at
> org.apache.flink.test.util.JavaProgramTestBase.testJobWithoutObjectReuse(JavaProgramTestBase.java:136)
> {code}
> The job itself failed as expected with "This is an expected Test Exception:1"
> after one restart, but the exception the client caught does not contain it.
> In the test log the collect client reached the sink of both attempts:
> {code}
> 02:31:35,262 [Thread-8] INFO
> org.apache.flink.streaming.api.operators.collect.CollectSinkFunction [] -
> Invalid request. Received version = , offset = 0, while expected version =
> 0cbf0890-bb27-4181-a956-cb28a988886f, offset = 0
> 02:31:35,392 [Thread-10] INFO
> org.apache.flink.streaming.api.operators.collect.CollectSinkFunction [] -
> Invalid request. Received version = 0cbf0890-bb27-4181-a956-cb28a988886f,
> offset = 0, while expected version = 672ae5ae-b048-4a8a-a231-979d262d8eb1,
> offset = 0
> {code}
> In the passing testJobWithObjectReuse run right after it, it reached neither.
> The release-2.2 failure on 2026-09-11 has the same two lines.
> It failed before in the AdaptiveScheduler tests leg of these nightlies, never
> in the other profiles:
> https://dev.azure.com/apache-flink/98463496-1af2-4620-8eab-a2ecc1a2e6fe/_build/results?buildId=71463&view=logs&j=8fd9202e-fd17-5b26-353c-ac1ff76c8f28
> (master, 2025-12-31)
> https://dev.azure.com/apache-flink/98463496-1af2-4620-8eab-a2ecc1a2e6fe/_build/results?buildId=76172&view=logs&j=8fd9202e-fd17-5b26-353c-ac1ff76c8f28
> (release-2.2, 2026-06-19)
> https://dev.azure.com/apache-flink/98463496-1af2-4620-8eab-a2ecc1a2e6fe/_build/results?buildId=77101&view=logs&j=8fd9202e-fd17-5b26-353c-ac1ff76c8f28
> (master, 2026-07-15)
> https://dev.azure.com/apache-flink/98463496-1af2-4620-8eab-a2ecc1a2e6fe/_build/results?buildId=78966&view=logs&j=8fd9202e-fd17-5b26-353c-ac1ff76c8f28
> (release-2.2, 2026-09-11)
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