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https://issues.apache.org/jira/browse/FLINK-11103?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17330471#comment-17330471
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Nico Kruber commented on FLINK-11103:
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[~trohrmann], I think the previous ping may not have reached you.
I think, this should be a fairly simple change that helps us a lot with
debugging applications that may have rogue threads and behave strangely even
though, no error appears in the logs.
> Set a default uncaught exception handler
> ----------------------------------------
>
> Key: FLINK-11103
> URL: https://issues.apache.org/jira/browse/FLINK-11103
> Project: Flink
> Issue Type: Improvement
> Components: Runtime / Coordination
> Affects Versions: 1.8.0
> Reporter: Nico Kruber
> Priority: Major
> Labels: stale-major, starter, usability
>
> We should set a default uncaught exception handler in Flink via
> {{Thread.setDefaultUncaughtExceptionHandler()}} which at least logs the
> exceptions. Ideally, we would even fail the job (could make this
> configurable) but users may have some ill-behaving threads, e.g. through
> libraries, which they would want to tolerate and we don't want to change
> behaviour now.
> (FLINK-5232 added this for the JobManager, we need it for the TaskManager)
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