[ https://issues.apache.org/jira/browse/PIG-3241?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Lohit Vijayarenu updated PIG-3241: ---------------------------------- Priority: Blocker (was: Major) > ConcurrentModificationException in POPartialAgg > ----------------------------------------------- > > Key: PIG-3241 > URL: https://issues.apache.org/jira/browse/PIG-3241 > Project: Pig > Issue Type: Bug > Affects Versions: 0.11 > Reporter: Lohit Vijayarenu > Priority: Blocker > Fix For: 0.12, 0.11.1 > > > While running few PIG scripts against Hadoop 2.0, I see consistently see > ConcurrentModificationException > {noformat} > at java.util.HashMap$HashIterator.remove(HashMap.java:811) > at > org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POPartialAgg.aggregate(POPartialAgg.java:365) > at > org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POPartialAgg.aggregateSecondLevel(POPartialAgg.java:379) > at > org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POPartialAgg.getNext(POPartialAgg.java:203) > at > org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator.processInput(PhysicalOperator.java:308) > at > org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POLocalRearrange.getNext(POLocalRearrange.java:263) > at > org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapBase.runPipeline(PigGenericMapBase.java:283) > at > org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapBase.map(PigGenericMapBase.java:278) > at > org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapBase.map(PigGenericMapBase.java:64) > at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:144) > at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:729) > at org.apache.hadoop.mapred.MapTask.run(MapTask.java:334) > at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:158) > at java.security.AccessController.doPrivileged(Native Method) > at javax.security.auth.Subject.doAs(Subject.java:396) > at > org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1441) > at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:153) > {noformat} > It looks like there is rawInputMap is being modified while elements are > removed from it. -- 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