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https://issues.apache.org/jira/browse/FLINK-15504?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17020268#comment-17020268
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Maximilian Michels commented on FLINK-15504:
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I think it is not a bad idea to inform users of such changes, in case they have
run into this themselves. I don't know what the barrier is for getting into the
release notes. I don't mind if we do not include the note.
> Flink suppresses stdout/stderr during JobGraph generation from JAR
> ------------------------------------------------------------------
>
> Key: FLINK-15504
> URL: https://issues.apache.org/jira/browse/FLINK-15504
> Project: Flink
> Issue Type: Bug
> Components: Client / Job Submission
> Reporter: Maximilian Michels
> Assignee: Maximilian Michels
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.10.0
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> Flink uses the {{OptimizerPlanEnvironment}} which replaces stdout/stderr
> during job graph creation. This was intended only for previewing the plan,
> but other parts of Flink, e.g. the Rest API have started to use this code as
> well.
> It may be acceptable to suppress output during plan preview, but we should
> not suppress the output during execution, e.g. via the REST API.
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