[jira] [Commented] (FLINK-15156) Warn user if System.exit() is called in user code

["Hwanju Kim (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-15156?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17267987#comment-17267987 ] 

Hwanju Kim commented on FLINK-15156:
------------------------------------

[~rmetzger] - No problem at all and thanks a lot for such thorough review. Good that we have unified security manager.

> Warn user if System.exit() is called in user code
> -------------------------------------------------
>
>                 Key: FLINK-15156
>                 URL: https://issues.apache.org/jira/browse/FLINK-15156
>             Project: Flink
>          Issue Type: Improvement
>          Components: Runtime / Coordination
>            Reporter: Robert Metzger
>            Assignee: Hwanju Kim
>            Priority: Minor
>              Labels: pull-request-available, starter
>             Fix For: 1.13.0
>
>
> It would make debugging Flink errors easier if we would intercept and log calls to System.exit() through the SecurityManager.
> A user recently had an error where the JobManager was shutting down because of a System.exit() in the user code: https://lists.apache.org/thread.html/b28dabcf3068d489f38399c456c80d48569fcdf74b15f8bb95d532d0%40%3Cuser.flink.apache.org%3E
> If I remember correctly, we had such issues before.
> I put this ticket into the "Runtime / Coordination" component, as it is mostly about improving the usability / debuggability in that area.



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