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Posted to issues@hbase.apache.org by "ramkrishna.s.vasudevan (JIRA)" <ji...@apache.org> on 2018/02/12 09:09:00 UTC

[jira] [Created] (HBASE-19977) FileMmapEngine allocation of byte buffers should be synchronized

ramkrishna.s.vasudevan created HBASE-19977:
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             Summary: FileMmapEngine allocation of byte buffers should be synchronized
                 Key: HBASE-19977
                 URL: https://issues.apache.org/jira/browse/HBASE-19977
             Project: HBase
          Issue Type: Bug
    Affects Versions: 2.0.0-alpha-4
            Reporter: ramkrishna.s.vasudevan
            Assignee: ramkrishna.s.vasudevan
             Fix For: 2.0.0-beta-2


Recently we have been testing bucket cache with mmap mode. We found that after the multi threading way of allocating the byte buffers for offheap bucket cache, the creation of the mmapped byte buffers needs to be synchronized for allocating the right sized mmapped buffers.



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