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https://issues.apache.org/jira/browse/PIG-1720?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12933098#action_12933098
]
Yan Zhou commented on PIG-1720:
-------------------------------
+1
> java.lang.NegativeArraySizeException during Quicksort
> -----------------------------------------------------
>
> Key: PIG-1720
> URL: https://issues.apache.org/jira/browse/PIG-1720
> Project: Pig
> Issue Type: Bug
> Components: impl
> Affects Versions: 0.8.0
> Reporter: Viraj Bhat
> Assignee: Thejas M Nair
> Fix For: 0.8.0
>
> Attachments: PIG-1720.1.patch
>
>
> I have a simple script, which I attempt to run with Pig 0.8
> The script looks like this:
> {code}
> clicks = load 'pairs.out' using PigStorage('\u0001') as (user,query,id);
> query0 = group clicks by query;
> query1 = foreach query0 {
> distinct_id = DISTINCT clicks.id;
> distinct_user = DISTINCT clicks.user;
> count = COUNT(distinct_user);
> generate count as count,group,distinct_id; }
> store query1 into 'query.out' using PigStorage('|');
> {code}
> The Mapper's fail in the quick sort phase with the following error message:
> {quote}
> java.lang.NegativeArraySizeException at
> org.apache.pig.data.BinInterSedes$BinInterSedesTupleRawComparator.compareBinInterSedesDatum(BinInterSedes.java:782)
> at
> org.apache.pig.data.BinInterSedes$BinInterSedesTupleRawComparator.compareBinSedesTuple(BinInterSedes.java:662)
> at
> org.apache.pig.data.BinInterSedes$BinInterSedesTupleRawComparator.compare(BinInterSedes.java:623)
> at
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigSecondaryKeyComparator.compare(PigSecondaryKeyComparator.java:78)
> at
> org.apache.hadoop.mapred.MapTask$MapOutputBuffer.compare(MapTask.java:995) at
> org.apache.hadoop.util.QuickSort.sortInternal(QuickSort.java:95) at
> org.apache.hadoop.util.QuickSort.sort(QuickSort.java:59) at
> org.apache.hadoop.mapred.MapTask$MapOutputBuffer.sortAndSpill(MapTask.java:1281)
> at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.flush(MapTask.java:1182)
> at
> org.apache.hadoop.mapred.MapTask$NewOutputCollector.close(MapTask.java:608)
> at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:676) at
> org.apache.hadoop.mapred.MapTask.run(MapTask.java:335) at
> org.apache.hadoop.mapred.Child$4.run(Child.java:242) 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:1045)
> at org.apache.hadoop.mapred.Child.main(Child.java:236)
> {quote}
> Viraj
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