Github user chtyim commented on a diff in the pull request: https://github.com/apache/twill/pull/14#discussion_r87353516 --- Diff: twill-api/src/main/java/org/apache/twill/api/TwillController.java --- @@ -89,4 +90,30 @@ * @return A {@link Future} that will be completed when the restart operation has been done. */ Future<String> restartInstances(String runnable, int instanceId, int... moreInstanceIds); + + /** + * Set the log levels for requested logger names for Twill applications running in a container. + * The log level for a logger name can be {@code null} except for the root logger, which will reset the log level for --- End diff -- What happen if the caller pass in `null` value for the root logger? Will it throw exception? Or will it get ignore?
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