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https://issues.apache.org/jira/browse/MAPREDUCE-6062?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15297754#comment-15297754
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Takuya Fukudome commented on MAPREDUCE-6062:
--------------------------------------------
Hi
This error seems to be occurred when we ran random read test on files over 2GB.
Because in the random read test, the long value of the target file size is
casted to int. I could reproduce the error by running random read test after
invoking TestDFSIO write with "-size 2GB".
> Use TestDFSIO test random read : job failed
> -------------------------------------------
>
> Key: MAPREDUCE-6062
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-6062
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: benchmarks
> Affects Versions: 2.2.0
> Environment: command : hadoop jar $JAR_PATH TestDFSIO-read -random
> -nrFiles 12 -size 8000
> Reporter: chongyuanhuang
>
> This is log:
> 2014-09-01 13:57:29,876 WARN [main] org.apache.hadoop.mapred.YarnChild:
> Exception running child : java.lang.IllegalArgumentException: n must be
> positive
> at java.util.Random.nextInt(Random.java:300)
> at
> org.apache.hadoop.fs.TestDFSIO$RandomReadMapper.nextOffset(TestDFSIO.java:601)
> at
> org.apache.hadoop.fs.TestDFSIO$RandomReadMapper.doIO(TestDFSIO.java:580)
> at
> org.apache.hadoop.fs.TestDFSIO$RandomReadMapper.doIO(TestDFSIO.java:546)
> at org.apache.hadoop.fs.IOMapperBase.map(IOMapperBase.java:134)
> at org.apache.hadoop.fs.IOMapperBase.map(IOMapperBase.java:37)
> at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:54)
> at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:430)
> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:342)
> at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:167)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:415)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1554)
> at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:162)
> 2014-09-01 13:57:29,886 INFO [main] org.apache.hadoop.mapred.Task: Runnning
> cleanup for the task
> 2014-09-01 13:57:29,894 WARN [main]
> org.apache.hadoop.mapreduce.lib.output.FileOutputCommitter: Could not delete
> hdfs://m101:8020/benchmarks/TestDFSIO/io_random_read/_temporary/1/_temporary/attempt_1409538816633_0005_m_000001_0
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