Ufuk Celebi created FLINK-4131:
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Summary: Confusing error for out dated RequestPartitionState
Key: FLINK-4131
URL: https://issues.apache.org/jira/browse/FLINK-4131
Project: Flink
Issue Type: Improvement
Reporter: Ufuk Celebi
Assignee: Ufuk Celebi
When a consumer requests a partition state for an old job or execution attempt
(e.g. failed job or attempt), the JobManager answers with a {{null}} state,
which fails the requesting task with the following cause:
{{IllegalStateException("Received unexpected partition state null for partition
request. This is a bug.")}}.
This is confusing to the user as one might think that this is the root failure
cause.
I propose to either ignore the null state at the Task or not respond on the
JobManager side if the job or execution attempt has been cleared (see
{{RequestPartitionState}} in {{JobManager.scala}}).
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