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https://issues.apache.org/jira/browse/FLINK-2618?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14985648#comment-14985648
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Sachin Goel commented on FLINK-2618:
------------------------------------
Haven't observed this in a long while.
> ExternalSortITCase failure
> --------------------------
>
> Key: FLINK-2618
> URL: https://issues.apache.org/jira/browse/FLINK-2618
> Project: Flink
> Issue Type: Bug
> Reporter: Sachin Goel
> Labels: test-stability
>
> {{ExternalSortITCase.testSpillingSortWithIntermediateMerge}} fails with the
> exception:
> {code}
> org.apache.flink.types.NullKeyFieldException: Field 0 is null, but expected
> to hold a key.
> at
> org.apache.flink.api.common.typeutils.record.RecordComparator.setReference(RecordComparator.java:212)
> at
> org.apache.flink.api.common.typeutils.record.RecordComparator.setReference(RecordComparator.java:40)
> at
> org.apache.flink.runtime.operators.sort.MergeIterator$HeadStream.nextHead(MergeIterator.java:127)
> at
> org.apache.flink.runtime.operators.sort.MergeIterator.next(MergeIterator.java:88)
> at
> org.apache.flink.runtime.operators.sort.MergeIterator.next(MergeIterator.java:69)
> at
> org.apache.flink.runtime.operators.sort.ExternalSortITCase.testSpillingSortWithIntermediateMerge(ExternalSortITCase.java:301)
> {code}
> Here is the build log:
> https://s3.amazonaws.com/archive.travis-ci.org/jobs/78579607/log.txt
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