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https://issues.apache.org/jira/browse/PIG-26?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12541412
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Olga Natkovich commented on PIG-26:
-----------------------------------
How much testing was done on this patch?
> distinct does not work on Bags that have spilled to disk.
> ---------------------------------------------------------
>
> Key: PIG-26
> URL: https://issues.apache.org/jira/browse/PIG-26
> Project: Pig
> Issue Type: Bug
> Components: data
> Affects Versions: 0.0.0, 0.1.0, site
> Reporter: Benjamin Reed
> Assignee: Benjamin Reed
> Attachments: distinct-test.patch, distinct.patch
>
>
> If you call distinct on a bag that has spilled to disk, you get the following
> error:
> java.lang.NullPointerException
> at
> org.apache.pig.data.BigDataBag$FileMerger$1.compare(BigDataBag.java:288)
> at
> org.apache.pig.data.BigDataBag$FileMerger$1.compare(BigDataBag.java:280)
> at
> java.util.PriorityQueue.siftUpUsingComparator(PriorityQueue.java:594)
> at java.util.PriorityQueue.siftUp(PriorityQueue.java:572)
> at java.util.PriorityQueue.offer(PriorityQueue.java:274)
> at java.util.PriorityQueue.add(PriorityQueue.java:251)
> at
> org.apache.pig.data.BigDataBag$FileMerger.<init>(BigDataBag.java:304)
> at org.apache.pig.data.BigDataBag.doSorting(BigDataBag.java:167)
> at org.apache.pig.data.BigDataBag.content(BigDataBag.java:211)
> at
> org.apache.pig.test.TestDataModel.testBigDataBag(TestDataModel.java:343)
> at
> org.apache.pig.test.TestDataModel.testBigDataBagOnDisk(TestDataModel.java:210)
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