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Posted to dev@hbase.apache.org by "Nick Dimiduk (JIRA)" <ji...@apache.org> on 2014/03/04 00:37:21 UTC

[jira] [Created] (HBASE-10660) MR over snapshots can OOM when alternative blockcache is enabled

Nick Dimiduk created HBASE-10660:
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             Summary: MR over snapshots can OOM when alternative blockcache is enabled
                 Key: HBASE-10660
                 URL: https://issues.apache.org/jira/browse/HBASE-10660
             Project: HBase
          Issue Type: Bug
          Components: mapreduce
    Affects Versions: 0.98.0, 0.99.0
            Reporter: Nick Dimiduk
            Assignee: Nick Dimiduk


Running {{IntegrationTestTableSnapshotInputFormat}} with the {{BucketCache}} enabled results in OOM. The map task is running a sequential scan over the region region it opened, so probably it's not benefiting much from a blockcache. Just disable blockcache entirely for these scans because it's likely the cache config detected is designed for a RS running on a different class of hardware than that running the map task.



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