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https://issues.apache.org/jira/browse/MAPREDUCE-4278?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13464638#comment-13464638
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Tom White commented on MAPREDUCE-4278:
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bq. This could be avoided by adding a timestamp component to local job ids?
It looks like getStagingAreaDir() is using a random number to generate a unique
staging directory, so you could reuse that unique identifier for the job ID.
Also, the local job directory (localRunner) needs to be made unique too,
otherwise the job configuration file could clash.
> cannot run two local jobs in parallel from the same gateway.
> ------------------------------------------------------------
>
> Key: MAPREDUCE-4278
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4278
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Affects Versions: 0.20.205.0, 0.23.1, 1.0.2
> Reporter: Araceli Henley
>
> I cannot run two local mode jobs from Pig in parallel from the same gateway,
> this is a typical use case. If I re-run the tests sequentially, then the test
> pass. This seems to be a problem from Hadoop.
> Additionally, the pig harness, expects to be able to run
> Pig-version-undertest against Pig-version-stable from the same gateway.
> To replicate the error:
> I have two clusters running from the same gateway.
> If I run the Pig regression suites nightly.conf in local mode in paralell -
> once on each cluster. Conflicts in M/R local mode result in failures in the
> tests.
> ERROR1:
> org.apache.hadoop.util.DiskChecker$DiskErrorException: Could not find
> output/file.out in any of the configured local directories
> at
> org.apache.hadoop.fs.LocalDirAllocator$AllocatorPerContext.getLocalPathToRead(LocalDirAllocator.java:429)
> at
> org.apache.hadoop.fs.LocalDirAllocator.getLocalPathToRead(LocalDirAllocator.java:160)
> at
> org.apache.hadoop.mapred.MapOutputFile.getOutputFile(MapOutputFile.java:56)
> at org.apache.hadoop.mapred.Task.calculateOutputSize(Task.java:944)
> at org.apache.hadoop.mapred.Task.sendLastUpdate(Task.java:924)
> at org.apache.hadoop.mapred.Task.done(Task.java:875)
> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:374)
> ---
> ERROR2:
> 2012-05-17 20:25:36,762 [main] INFO
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher
> -
> HadoopJobId: job_local_0001
> 2012-05-17 20:25:36,778 [Thread-3] INFO org.apache.hadoop.mapred.Task -
> Using ResourceCalculatorPlugin : org.apache.
> hadoop.util.LinuxResourceCalculatorPlugin@ffa490e
> 2012-05-17 20:25:36,837 [Thread-3] WARN
> org.apache.hadoop.mapred.LocalJobRunner - job_local_0001
> java.lang.IndexOutOfBoundsException: Index: 1, Size: 1
> at java.util.ArrayList.RangeCheck(ArrayList.java:547)
> at java.util.ArrayList.get(ArrayList.java:322)
> at
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigInputFormat.getLoadFunc(PigInputFormat.java
> :153)
> at
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigInputFormat.createRecordReader(PigInputForm
> at.java:106)
> at
> org.apache.hadoop.mapred.MapTask$NewTrackingRecordReader.<init>(MapTask.java:489)
> at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:731)
> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:370)
> at
> org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:212)
> 2012-05-17 20:25:41,291 [main] INFO
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher
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