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https://issues.apache.org/jira/browse/HIVE-3809?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13561822#comment-13561822
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Mikhail Bautin commented on HIVE-3809:
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[~ashutoshc]: any chance this fix could be committed to branch 0.9 as well, if
this is not too difficult? Thanks!
Patch for 0.9:
https://issues.apache.org/jira/secure/attachment/12562623/0001-HIVE-3809-Concurrency-issue-in-RCFile-multiple-threa.patch
> Concurrency issue in RCFile: multiple threads can use the same decompressor
> ---------------------------------------------------------------------------
>
> Key: HIVE-3809
> URL: https://issues.apache.org/jira/browse/HIVE-3809
> Project: Hive
> Issue Type: Bug
> Reporter: Mikhail Bautin
> Assignee: Mikhail Bautin
> Priority: Critical
> Fix For: 0.11.0
>
> Attachments:
> 0001-HIVE-3809-Concurrency-issue-in-RCFile-multiple-threa.patch,
> 0001-HIVE-3809-Decompressors-should-only-be-returned-to-t.patch, D7419.1.patch
>
>
> RCFile is not thread-safe, even if each reader is only used by one thread as
> intended, because it is possible to return decompressors to the pool multiple
> times by calling close on the reader multiple times. Then, different threads
> can pick up the same decompressor twice from the pool, resulting in
> decompression failures.
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