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Posted to issues@flink.apache.org by StephanEwen <gi...@git.apache.org> on 2016/09/15 18:07:33 UTC
[GitHub] flink pull request #2503: [FLINK-4625] [core] Add a safety net to forcibly t...
GitHub user StephanEwen opened a pull request:
https://github.com/apache/flink/pull/2503
[FLINK-4625] [core] Add a safety net to forcibly terminate JVM if clean shutdown freezed.
Resource managers like YARN send the JVM the `SIGTERM` signal to kill the process.
With `SIGTERM`, the JVM shutdown hooks run, and may cause the process to freeze up during 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 and never lock the JVM shutdown.
This pull requests adds a shutdown hook that calls `Runtime.halt()` after a delay. This forcibly terminates the JVM if clean shutdown does not succeed within a certain time (default is five seconds).
The pull request also adds tests that validate the behavior of JVM shutdown lockups and that the safety net ensures the process really shuts down.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/StephanEwen/incubator-flink process_self_kill
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/2503.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #2503
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commit d5b9860773ec7aaf0b238544b794a10012d8dda5
Author: Stephan Ewen <se...@apache.org>
Date: 2016-09-15T17:27:06Z
[FLINK-4625] [core] Add a safety net to forcibly terminate JVM is clean shutdown freezed.
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[GitHub] flink pull request #2503: [FLINK-4625] [core] Add a safety net to forcibly t...
Posted by asfgit <gi...@git.apache.org>.
Github user asfgit closed the pull request at:
https://github.com/apache/flink/pull/2503
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