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Posted to issues@flink.apache.org by "Stephan Ewen (JIRA)" <ji...@apache.org> on 2016/09/15 17:27:20 UTC

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

Stephan Ewen created FLINK-4625:
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             Summary: 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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