[
https://issues.apache.org/jira/browse/HADOOP-4264?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Allen Wittenauer resolved HADOOP-4264.
--------------------------------------
Resolution: Fixed
> DFSIO is failing on 500 nodes cluster
> -------------------------------------
>
> Key: HADOOP-4264
> URL: https://issues.apache.org/jira/browse/HADOOP-4264
> Project: Hadoop Common
> Issue Type: Bug
> Components: io, test
> Affects Versions: 0.19.0
> Reporter: Suman Sehgal
>
> On executing following command :
> bin/hadoop jar ~/hadoop/hadoop-0.19.0-test.jar TestDFSIO -write -nrFiles 990
> -fileSize 320
> This error occurs:
> 08/09/24 06:15:03 INFO mapred.JobClient: map 98% reduce 32%
> java.io.IOException: Job failed!
> at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:1201)
> at org.apache.hadoop.fs.TestDFSIO.runIOTest(TestDFSIO.java:236)
> at org.apache.hadoop.fs.TestDFSIO.writeTest(TestDFSIO.java:218)
> at org.apache.hadoop.fs.TestDFSIO.main(TestDFSIO.java:354)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at
> org.apache.hadoop.util.ProgramDriver$ProgramDescription.invoke(ProgramDriver.java:68)
> at org.apache.hadoop.util.ProgramDriver.driver(ProgramDriver.java:139)
> at org.apache.hadoop.test.AllTestDriver.main(AllTestDriver.java:77)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at org.apache.hadoop.util.RunJar.main(RunJar.java:165)
> at org.apache.hadoop.mapred.JobShell.run(JobShell.java:54)
> at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
> at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:79)
> at org.apache.hadoop.mapred.JobShell.main(JobShell.java:68)
> On looking at hadoop logs, It seems that file names are clashing
> 2008-09-24 06:21:41,618 INFO org.apache.hadoop.mapred.JobTracker: Removed
> completed task 'attempt_200809240600_0005_m_000802_2_1222236048515' from
> 'tracker_xxxx/client x.x.x.x:xxxxx'
> 2008-09-24 06:21:41,627 INFO org.apache.hadoop.mapred.JobTracker: Adding task
> 'attempt_200809240600_0005_m_000802_4_1222236048515' to tip
> task_200809240600_0005_m_000802, for tracker 'tracker_xxxx/client
> x.x.x.x:xxxxx'
> 2008-09-24 06:21:41,627 INFO org.apache.hadoop.mapred.JobInProgress: Choosing
> rack-local task task_200809240600_0005_m_000802
> 2008-09-24 06:21:41,724 INFO org.apache.hadoop.mapred.TaskInProgress: Error
> from attempt_200809240600_0005_m_000900_2_1222236048515:
> org.apache.hadoop.ipc.RemoteException:
> org.apache.hadoop.hdfs.protocol.AlreadyBeingCreatedException: failed to
> create file /benchmarks/TestDFSIO/io_data/test_io_20 for
> DFSClient_attempt_200809240600_0005_m_000900_2_1222236048515 on client client
> x.x.x.x, because this file is already being created by
> DFSClient_attempt_200809240600_0005_m_000900_0_1222236048515 on client x.x.x.x
--
This message was sent by Atlassian JIRA
(v6.2#6252)
