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Posted to dev@hive.apache.org by "Mikhail Bautin (JIRA)" <ji...@apache.org> on 2012/12/16 00:02:13 UTC

[jira] [Created] (HIVE-3809) Concurrency issue in RCFile: multiple threads can use the same decompressor

Mikhail Bautin created HIVE-3809:
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             Summary: 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
            Priority: Critical


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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