[jira] [Resolved] (FLINK-4625) Guard Flink processes against blocking shutdown hooks

["Stephan Ewen (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-4625?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Stephan Ewen resolved FLINK-4625.
---------------------------------
    Resolution: Fixed

Fixed via 5066125f9a377d232f77f6fbcac3c22ebea66b39

> Guard Flink processes against blocking shutdown hooks
> -----------------------------------------------------
>
>                 Key: FLINK-4625
>                 URL: https://issues.apache.org/jira/browse/FLINK-4625
>             Project: Flink
>          Issue Type: Improvement
>          Components: Distributed Coordination
>    Affects Versions: 1.1.2
>            Reporter: Stephan Ewen
>            Assignee: Stephan Ewen
>             Fix For: 1.2.0
>
>
> Resource managers like YARN send the JVM the {{SIGTERM}} signal to kill the process, if it wants to terminate a process.
> With {{SIGTERM}}, the JVM shutdown hooks run, and may cause the process to freeze up on shutdown. Especially since all dependencies (like Hadoop) may install shutdown hooks (and do so), it is not in Flink's control to make sure all Shutdown hooks are well behaved.
> I propose to add a guard that forcibly terminates the JVM if clean shutdown does not succeed within a certain time (say five seconds).



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