[ 
https://issues.apache.org/jira/browse/TWILL-138?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15651613#comment-15651613
 ] 

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_r87239353
  
    --- Diff: 
twill-core/src/main/java/org/apache/twill/internal/AbstractTwillController.java 
---
    @@ -170,6 +171,37 @@ public String apply(Set<String> input) {
         });
       }
     
    +  @Override
    +  public Future<LogEntry.Level> setRootLogLevel(LogEntry.Level logLevel) {
    +    return 
sendMessage(SystemMessages.setLogLevels(ImmutableMap.of(Logger.ROOT_LOGGER_NAME,
 logLevel)), logLevel);
    +  }
    +
    +  @Override
    +  public Future<LogEntry.Level> setRootLogLevel(String runnableName, 
LogEntry.Level logLevel) {
    +    return sendMessage(SystemMessages.setLogLevels(runnableName, 
ImmutableMap.of(Logger.ROOT_LOGGER_NAME, logLevel)),
    +                       logLevel);
    +  }
    +
    +  @Override
    +  public Future<Map<String, LogEntry.Level>> setLogLevels(Map<String, 
LogEntry.Level> logLevels) {
    +    return sendMessage(SystemMessages.setLogLevels(logLevels), logLevels);
    +  }
    +
    +  @Override
    +  public Future<Map<String, LogEntry.Level>> setLogLevels(String 
runnableName,
    +                                                          Map<String, 
LogEntry.Level> runnableLogLevels) {
    +    return sendMessage(SystemMessages.setLogLevels(runnableName, 
runnableLogLevels), runnableLogLevels);
    +  }
    +
    +  @Override
    +  public Future<String> resetLogLevelsToDefault() {
    +    return sendMessage(SystemMessages.resetLogLevels(null), "all");
    --- End diff --
    
    This is inconsistent with the `setLogLevels` method, which doesn't require 
explicitly passing in `null` for all runnables case.


> 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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