Github user anew commented on a diff in the pull request: https://github.com/apache/twill/pull/14#discussion_r86273964 --- Diff: twill-api/src/main/java/org/apache/twill/api/TwillController.java --- @@ -89,4 +90,44 @@ * @return A {@link Future} that will be completed when the restart operation has been done. */ Future<String> restartInstances(String runnable, int instanceId, int... moreInstanceIds); + --- End diff -- It's not clear to me why these need to return a future (or anything at all). Is it to be able to communicate an error/exception in case the setting of the log level fails? So, when it returns it is guaranteed that all runnables have actually adapted the new log level?
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