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https://issues.apache.org/jira/browse/BEAM-8278?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16932836#comment-16932836
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Kyle Weaver commented on BEAM-8278:
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It is actually possible to see the output of the process, it's just not enabled
by default. If the Flink logger is set to DEBUG, the process output will be
sent to the stdout of the task manager.
[https://github.com/apache/beam/blob/c2f0d282337f3ae0196a7717712396a5a41fdde1/runners/java-fn-execution/src/main/java/org/apache/beam/runners/fnexecution/environment/ProcessManager.java#L42]
> Get output from PROCESS environment
> -----------------------------------
>
> Key: BEAM-8278
> URL: https://issues.apache.org/jira/browse/BEAM-8278
> Project: Beam
> Issue Type: Improvement
> Components: java-fn-execution
> Reporter: Kyle Weaver
> Assignee: Kyle Weaver
> Priority: Major
>
> When a worker process fails to start up, we get the exit code, but no other
> information as to why it failed.
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