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Posted to mapreduce-issues@hadoop.apache.org by "Alan Burlison (JIRA)" <ji...@apache.org> on 2016/03/15 15:22:33 UTC

[jira] [Created] (MAPREDUCE-6651) MCollectorOutputHandler.cc makes misaligned accesses, coredumps ensue

Alan Burlison created MAPREDUCE-6651:
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             Summary: MCollectorOutputHandler.cc makes misaligned accesses, coredumps ensue
                 Key: MAPREDUCE-6651
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6651
             Project: Hadoop Map/Reduce
          Issue Type: Sub-task
          Components: client
    Affects Versions: 2.7.2
         Environment: Any platform with alignment constraints
            Reporter: Alan Burlison
            Assignee: Alan Burlison


MCollectorOutputHandler.cc casts a misaligned byte pointer to a KVBufferWithParititionId, which causes coredumps on any platform with alignment constraints, such as SPARC. The misaligned structure needs to be copied into a local, aligned structure and the data referenced from there.



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