[MAPREDUCE-6879] TestDFSIO#sequentialTest throws java.lang.NullPointerException due to uninitialized IOStream

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Won't Fix
• Affects Version/s: 2.7.3, 3.0.0-alpha2
• Component/s: benchmarks
• Assignee: Unassigned
• Reporter: Wenxin He
• Created: 20/Apr/17 08:34
• Updated: 16/Aug/19 15:39
• Resolved: 16/Aug/19 15:39

Description

When I use -seq arg to write files, TestDFSIO#sequentialTest throws java.lang.NullPointerException due to uninitialized stream inherited from IOMapperBase:

[root@7b65290f2609 hadoop-3.0.0-alpha3-SNAPSHOT]# bin/hadoop jar share/hadoop/mapreduce/hadoop-mapreduce-client-jobclient-3.0.0-alpha3-SNAPSHOT-tests.jar TestDFSIO -seq -write
2017-04-20 15:50:43,505 INFO fs.TestDFSIO: TestDFSIO.1.8
2017-04-20 15:50:43,510 INFO fs.TestDFSIO: nrFiles = 1
2017-04-20 15:50:43,510 INFO fs.TestDFSIO: nrBytes (MB) = 1.0
2017-04-20 15:50:43,510 INFO fs.TestDFSIO: bufferSize = 1000000
2017-04-20 15:50:43,510 INFO fs.TestDFSIO: baseDir = /benchmarks/TestDFSIO
2017-04-20 15:50:43,655 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
java.lang.NullPointerException
	at org.apache.hadoop.fs.TestDFSIO$WriteMapper.doIO(TestDFSIO.java:427)
	at org.apache.hadoop.fs.TestDFSIO$WriteMapper.doIO(TestDFSIO.java:395)
	at org.apache.hadoop.fs.TestDFSIO.sequentialTest(TestDFSIO.java:722)
	at org.apache.hadoop.fs.TestDFSIO.run(TestDFSIO.java:846)
	at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:76)
	at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:90)
	at org.apache.hadoop.fs.TestDFSIO.main(TestDFSIO.java:731)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:71)
	at org.apache.hadoop.util.ProgramDriver.run(ProgramDriver.java:144)
	at org.apache.hadoop.test.MapredTestDriver.run(MapredTestDriver.java:136)
	at org.apache.hadoop.test.MapredTestDriver.main(MapredTestDriver.java:144)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.apache.hadoop.util.RunJar.run(RunJar.java:239)
	at org.apache.hadoop.util.RunJar.main(RunJar.java:153)

Issue Links

• links to: GitHub Pull Request #215