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

     [ https://issues.apache.org/jira/browse/SPARK-1775?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Matei Zaharia updated SPARK-1775:
---------------------------------

    Labels: Starter  (was: )

> 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
>              Labels: Starter
>
> 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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