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https://issues.apache.org/jira/browse/FLINK-1437?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14303013#comment-14303013
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ASF GitHub Bot commented on FLINK-1437:
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Github user StephanEwen commented on the pull request:
https://github.com/apache/flink/pull/342#issuecomment-72621357
I ran into this error as well. Will merge this and add a test...
> Bug in PojoSerializer's copy() method
> -------------------------------------
>
> Key: FLINK-1437
> URL: https://issues.apache.org/jira/browse/FLINK-1437
> Project: Flink
> Issue Type: Bug
> Components: Java API
> Reporter: Timo Walther
> Assignee: Timo Walther
>
> The PojoSerializer's {{copy()}} method does not work properly with {{null}}
> values. An exception could look like:
> {code}
> Caused by: java.io.IOException: Thread 'SortMerger spilling thread'
> terminated due to an exception: null
> at
> org.apache.flink.runtime.operators.sort.UnilateralSortMerger$ThreadBase.run(UnilateralSortMerger.java:792)
> Caused by: java.io.EOFException
> at
> org.apache.flink.runtime.io.disk.RandomAccessInputView.nextSegment(RandomAccessInputView.java:83)
> at
> org.apache.flink.runtime.memorymanager.AbstractPagedInputView.advance(AbstractPagedInputView.java:159)
> at
> org.apache.flink.runtime.memorymanager.AbstractPagedInputView.readByte(AbstractPagedInputView.java:270)
> at
> org.apache.flink.runtime.memorymanager.AbstractPagedInputView.readUnsignedByte(AbstractPagedInputView.java:277)
> at org.apache.flink.types.StringValue.copyString(StringValue.java:839)
> at
> org.apache.flink.api.common.typeutils.base.StringSerializer.copy(StringSerializer.java:83)
> at
> org.apache.flink.api.java.typeutils.runtime.PojoSerializer.copy(PojoSerializer.java:261)
> at
> org.apache.flink.runtime.operators.sort.NormalizedKeySorter.writeToOutput(NormalizedKeySorter.java:449)
> at
> org.apache.flink.runtime.operators.sort.UnilateralSortMerger$SpillingThread.go(UnilateralSortMerger.java:1303)
> at
> org.apache.flink.runtime.operators.sort.UnilateralSortMerger$ThreadBase.run(UnilateralSortMerger.java:788)
> {code}
> I'm working on a fix for that...
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