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https://issues.apache.org/jira/browse/TWILL-138?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15651607#comment-15651607
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ASF GitHub Bot commented on TWILL-138:
--------------------------------------

Github user chtyim commented on a diff in the pull request:

    https://github.com/apache/twill/pull/14#discussion_r87244879
  
    --- Diff: 
twill-yarn/src/main/java/org/apache/twill/internal/ServiceMain.java ---
    @@ -264,6 +262,10 @@ protected String getLoggerLevel(Logger logger) {
         return "OFF";
       }
     
    +  protected String getLogLevels() {
    +    return "";
    --- End diff --
    
    Why we can't set the custom log levels at launch in the same programmatic 
way as when a system message is received?


> Runtime change of Application runnable log level
> ------------------------------------------------
>
>                 Key: TWILL-138
>                 URL: https://issues.apache.org/jira/browse/TWILL-138
>             Project: Apache Twill
>          Issue Type: New Feature
>          Components: core
>            Reporter: Henry Saputra
>
> With TWILL-24 is supported for setting log level when starting the Twill 
> application, next enhancement is to able to send command to update the 
> aggregate log level for a particular runnable in a Twill application.



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