Apache Spark commented on SPARK-16002:

User 'lw-lin' has created a pull request for this issue:

> 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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