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https://issues.apache.org/jira/browse/SPARK-21775?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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LvDongrong updated SPARK-21775:
-------------------------------
    Attachment: web.PNG
                terminal.PNG

I changed the loglevel of driver  to debug and take effects, so as other 
executors.

> Dynamic Log Level Settings for executors
> ----------------------------------------
>
>                 Key: SPARK-21775
>                 URL: https://issues.apache.org/jira/browse/SPARK-21775
>             Project: Spark
>          Issue Type: New Feature
>          Components: Spark Core, Web UI
>    Affects Versions: 2.2.0
>            Reporter: LvDongrong
>         Attachments: terminal.PNG, web.PNG
>
>
> Someimes we want to change the log level of executor when our application has 
> already deployed, to see detail infomation or decrease the log items. 
> Changing the log4j configure file is not convenient,so We add the ability to 
> set log level settings for a running executor. It can also reverts the log 
> level back to what it was before you added the setting.



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