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https://issues.apache.org/jira/browse/MAPREDUCE-6903?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17802816#comment-17802816
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Shilun Fan commented on MAPREDUCE-6903:
---------------------------------------
Bulk update: moved all 3.4.0 non-blocker issues, please move back if it is a
blocker. Retarget 3.5.0.
> NPE occured when run MapredTestDriver's testcase
> ------------------------------------------------
>
> Key: MAPREDUCE-6903
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-6903
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: test
> Affects Versions: 3.0.0-alpha4
> Reporter: LiXin Ge
> Assignee: LiXin Ge
> Priority: Major
> Labels: easyfix
> Attachments: MAPREDUCE-6903.001.patch, MAPREDUCE-6903.002.patch,
> MAPREDUCE-6903.003.patch, MAPREDUCE-6903.004.patch
>
>
> When runing the timelineperformance test from MapredTestDriver without input
> parameter, an NPE was throwed:
> {quote}
> ./hadoop org.apache.hadoop.test.MapredTestDriver timelineperformance
> ...
> 2017-06-08 09:32:13,194 ERROR mapreduce.SimpleEntityWriterV1: writing to the
> timeline service failed
> java.lang.NullPointerException
> at
> org.apache.hadoop.yarn.client.api.impl.TimelineClientImpl.putEntities(TimelineClientImpl.java:178)
> at
> org.apache.hadoop.mapreduce.SimpleEntityWriterV1.map(SimpleEntityWriterV1.java:82)
> at
> org.apache.hadoop.mapreduce.SimpleEntityWriterV1.map(SimpleEntityWriterV1.java:41)
> at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:146)
> at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:793)
> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:341)
> at
> org.apache.hadoop.mapred.LocalJobRunner$Job$MapTaskRunnable.run(LocalJobRunner.java:271)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> {quote}
> That's better to add a protection of NULL pointer check.
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