GitHub user zentol opened a pull request:
https://github.com/apache/flink/pull/3611
[backport] [FLINK-6183]/[FLINK-6184] Prevent some NPE and unclosed metric
groups
Backport of #3610 for 1.2 .
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/zentol/flink 6183_6184_metric_task_backport
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/3611.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 #3611
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commit 790b3ce444e10191731850bad71c35fe050d9af3
Author: zentol <ches...@apache.org>
Date: 2017-03-24T18:11:58Z
[FLINK-6184] Prevent NPE in buffer metrics
commit 13e40466ffe63783c59cc979900ba7af2d693576
Author: zentol <ches...@apache.org>
Date: 2017-03-24T18:39:31Z
[FLINK-6183] [metrics] Prevent some cases of TaskMG not being closed
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