[MAPREDUCE-6903] NPE occured when run MapredTestDriver's testcase

• Type: Bug
• Status: Patch Available
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 3.0.0-alpha4
• Component/s: test
• Labels: easyfix
• Target Version/s: 3.5.0
• Flags: Patch
• Assignee: LiXin Ge
• Reporter: LiXin Ge
• Created: 22/Jun/17 09:22
• Updated: 04/Jan/24 09:35

Description

When runing the timelineperformance test from MapredTestDriver without input parameter, an NPE was throwed:

./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)

That's better to add a protection of NULL pointer check.