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Posted to issues@spark.apache.org by "Prashant Sharma (JIRA)" <ji...@apache.org> on 2017/01/02 11:18:58 UTC
[jira] [Commented] (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:comment-tabpanel&focusedCommentId=15792707#comment-15792707 ]
Prashant Sharma commented on SPARK-18991:
-----------------------------------------
Thank you for the fix !
> 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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