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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2016/10/15 02:40:20 UTC

[jira] [Commented] (SPARK-16002) Sleep when no new data arrives to avoid 100% CPU usage

    [ https://issues.apache.org/jira/browse/SPARK-16002?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15577198#comment-15577198 ] 

Apache Spark commented on SPARK-16002:
--------------------------------------

User 'lw-lin' has created a pull request for this issue:
https://github.com/apache/spark/pull/15497

> Sleep when no new data arrives to avoid 100% CPU usage
> ------------------------------------------------------
>
>                 Key: SPARK-16002
>                 URL: https://issues.apache.org/jira/browse/SPARK-16002
>             Project: Spark
>          Issue Type: Sub-task
>          Components: SQL
>            Reporter: Shixiong Zhu
>            Assignee: Shixiong Zhu
>             Fix For: 2.0.0
>
>
> Right now if the trigger is ProcessTrigger(0), StreamExecution will keep polling new data even if there is no data. Then the CPU usage will be 100%. We should add a minimum polling delay when no new data arrives.



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