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

    https://github.com/apache/twill/pull/58#discussion_r132296198
  
    --- Diff: 
twill-yarn/src/main/java/org/apache/twill/internal/appmaster/ApplicationMasterService.java
 ---
    @@ -193,7 +200,91 @@ private EventHandler 
createEventHandler(TwillSpecification twillSpec) throws Cla
         
Preconditions.checkArgument(EventHandler.class.isAssignableFrom(handlerClass),
                                     "Class {} does not implements {}",
                                     handlerClass, 
EventHandler.class.getName());
    -    return Instances.newInstance((Class<? extends EventHandler>) 
handlerClass);
    +    final EventHandler delegate = Instances.newInstance((Class<? extends 
EventHandler>) handlerClass);
    +    if (delegate == null) {
    --- End diff --
    
    `Instances.newInstance` never return `null`.


---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastruct...@apache.org or file a JIRA ticket
with INFRA.
---

Reply via email to