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https://issues.apache.org/jira/browse/HADOOP-10490?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13966042#comment-13966042
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Chris Nauroth commented on HADOOP-10490:
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One more note on this patch: I needed to change the stub {{CompressionCodec}}
used in the tests to return a non-null value from {{createOutputStream}}. This
is because the logic inside the {{close}} method assumes that the underlying
{{CompressionOutputStream}} is non-null. Without this change, some of the
tests were throwing {{NullPointerException}} when I tried to close the files.
> TestMapFile and TestBloomMapFile leak file descriptors.
> -------------------------------------------------------
>
> Key: HADOOP-10490
> URL: https://issues.apache.org/jira/browse/HADOOP-10490
> Project: Hadoop Common
> Issue Type: Bug
> Components: test
> Affects Versions: 3.0.0, 2.4.0
> Reporter: Chris Nauroth
> Assignee: Chris Nauroth
> Priority: Minor
> Attachments: HADOOP-10490.1.patch
>
>
> Multiple tests in {{TestMapFile}} and {{TestBloomMapFile}} open files but
> don't close them. On Windows, the leaked file descriptors cause subsequent
> tests to fail, because file locks are still held while trying to delete the
> test data directory.
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