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https://issues.apache.org/jira/browse/HADOOP-14524?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16837429#comment-16837429
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Kihwal Lee commented on HADOOP-14524:
-------------------------------------
Cherry-picked to 2.8. The new unit test passed.
> Make CryptoCodec Closeable so it can be cleaned up proactively
> --------------------------------------------------------------
>
> Key: HADOOP-14524
> URL: https://issues.apache.org/jira/browse/HADOOP-14524
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Xiao Chen
> Assignee: Xiao Chen
> Priority: Major
> Fix For: 2.9.0, 3.0.0-alpha4, 2.8.6
>
> Attachments: HADOOP-14524.01.patch, HADOOP-14524.branch-2.01.patch
>
>
> See HADOOP-14523 for motivation. Credit to [~mi...@cloudera.com] for
> reporting initially there.
> Basically, the {{CryptoCodec}} class is not a closeable, but the
> {{OpensslAesCtrCryptoCodec}} implementation of it contains a closeable member
> (the Random object). Currently it is left for {{finalize()}} to clean up,
> this depends on when a FGC is run, and would create problems if
> {{OpensslAesCtrCryptoCodec}} is used with {{OsSecureRandom}}, which could let
> OS run out of FDs on {{/dev/urandom}} if too many codecs created.
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