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Posted to common-dev@hadoop.apache.org by "Hari Shreedharan (JIRA)" <ji...@apache.org> on 2014/05/11 00:15:31 UTC

[jira] [Created] (HADOOP-10591) Compression codecs must used pooled direct buffers or deallocate direct buffers when stream is closed

Hari Shreedharan created HADOOP-10591:
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             Summary: Compression codecs must used pooled direct buffers or deallocate direct buffers when stream is closed
                 Key: HADOOP-10591
                 URL: https://issues.apache.org/jira/browse/HADOOP-10591
             Project: Hadoop Common
          Issue Type: Bug
            Reporter: Hari Shreedharan


Currently direct buffers allocated by compression codecs like Gzip (which allocates 2 direct buffers per instance) are not deallocated when the stream is closed. Eventually for long running processes which create a huge number of files, these direct buffers are left hanging till a full gc, which may or may not happen in a reasonable amount of time - especially if the process does not use a whole lot of heap.

Either these buffers should be pooled or they should be deallocated when the stream is closed.



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