GitHub user andrewor14 opened a pull request:
https://github.com/apache/spark/pull/4871
[SPARK-6133] Make sc.stop() idempotent
Before we would get the following error if we called `sc.stop()` twice.
This is because the listener bus would try to post the end event again even
after it has already stopped. This happens occasionally when flaky tests fail,
usually as a result of other sources of error.
```
15/03/02 18:07:25.682 pool-1-thread-1 ERROR LiveListenerBus:
SparkListenerBus has already stopped! Dropping event
SparkListenerApplicationEnd(1425348445682)
```
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/andrewor14/spark sc-stop
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/4871.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 #4871
----
commit 915db1620caee57126b436e9089c4715b5f1b766
Author: Andrew Or <[email protected]>
Date: 2015-03-03T09:02:05Z
Move code into code
----
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