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Tom White commented on MAPREDUCE-4278: -------------------------------------- This looks like the right approach. Can you write a unit test that shows that this fixes the problem? You could use a waiting job from UtilsForTests that ensures two jobs are running concurrently. > 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 > Reporter: Araceli Henley > Attachments: MAPREDUCE-4278-branch1.patch > > > 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 -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira