GitHub user andrewor14 opened a pull request:
https://github.com/apache/spark/pull/10417
[SPARK-12466] Fix harmless NPE in tests
```
[info] ReplayListenerSuite:
[info] - Simple replay (58 milliseconds)
java.lang.NullPointerException
at
org.apache.spark.deploy.master.Master$$anonfun$asyncRebuildSparkUI$1.applyOrElse(Master.scala:982)
at
org.apache.spark.deploy.master.Master$$anonfun$asyncRebuildSparkUI$1.applyOrElse(Master.scala:980)
```
https://amplab.cs.berkeley.edu/jenkins/view/Spark-QA-Test/job/Spark-Master-SBT/4316/AMPLAB_JENKINS_BUILD_PROFILE=hadoop2.2,label=spark-test/consoleFull
This was introduced in #10284. It's harmless because the NPE is caused by a
race that occurs mainly in `local-cluster` tests (but don't actually fail the
tests).
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/andrewor14/spark fix-harmless-npe
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/10417.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 #10417
----
commit 42334e082673d3ccff374c47111068f27dd8ddff
Author: Andrew Or <[email protected]>
Date: 2015-12-21T19:44:48Z
Do null check on `self`
----
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