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Posted to issues@spark.apache.org by "Shixiong Zhu (JIRA)" <ji...@apache.org> on 2016/12/23 23:39:58 UTC

[jira] [Resolved] (SPARK-18991) Change ContextCleaner.referenceBuffer to ConcurrentHashMap to make it faster

     [ https://issues.apache.org/jira/browse/SPARK-18991?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Shixiong Zhu resolved SPARK-18991.
----------------------------------
       Resolution: Fixed
    Fix Version/s: 2.2.0
                   2.1.1

> Change ContextCleaner.referenceBuffer to ConcurrentHashMap to make it faster
> ----------------------------------------------------------------------------
>
>                 Key: SPARK-18991
>                 URL: https://issues.apache.org/jira/browse/SPARK-18991
>             Project: Spark
>          Issue Type: Improvement
>          Components: Spark Core
>            Reporter: Shixiong Zhu
>            Assignee: Shixiong Zhu
>             Fix For: 2.1.1, 2.2.0
>
>
> Right now `ContextCleaner.referenceBuffer` is ConcurrentLinkedQueue and the time complexity of the `remove` action is O(n). It can be changed to use ConcurrentHashMap whose `remove` is O(1).



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