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Posted to issues@spark.apache.org by "Matei Zaharia (JIRA)" <ji...@apache.org> on 2014/05/10 03:12:18 UTC

[jira] [Created] (SPARK-1775) Unneeded lock in ShuffleMapTask.deserializeInfo

Matei Zaharia created SPARK-1775:
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             Summary: Unneeded lock in ShuffleMapTask.deserializeInfo
                 Key: SPARK-1775
                 URL: https://issues.apache.org/jira/browse/SPARK-1775
             Project: Spark
          Issue Type: Bug
          Components: Spark Core
    Affects Versions: 0.9.0, 1.0.0, 0.9.1
            Reporter: Matei Zaharia


This was used in the past to have a cache of deserialized ShuffleMapTasks, but that's been removed, so there's no need for a lock. It slows down Spark when task descriptions are large, e.g. due to large lineage graphs or local variables.



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