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https://issues.apache.org/jira/browse/TWILL-240?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16101997#comment-16101997
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ASF GitHub Bot commented on TWILL-240:
--------------------------------------
Github user sameetandpotatoes commented on a diff in the pull request:
https://github.com/apache/twill/pull/58#discussion_r129645453
--- Diff:
twill-yarn/src/main/java/org/apache/twill/internal/appmaster/ApplicationMasterService.java
---
@@ -222,6 +226,7 @@ protected void doStart() throws Exception {
// initialize the event handler, if it fails, it will fail the
application.
if (eventHandler != null) {
eventHandler.initialize(new
BasicEventHandlerContext(twillSpec.getEventHandler()));
+ eventHandler.started(twillRuntimeSpec.getTwillAppName(),
twillRuntimeSpec.getTwillAppRunId());
--- End diff --
According to the comment above this `if` statement, if the event handler
fails to initialize, will any twill application state be recorded?
> Improve EventHandler to handle more application lifecycle events
> ----------------------------------------------------------------
>
> Key: TWILL-240
> URL: https://issues.apache.org/jira/browse/TWILL-240
> Project: Apache Twill
> Issue Type: New Feature
> Reporter: Chengfeng Mao
> Assignee: Chengfeng Mao
>
> Application Master should be able to run application specific code when
> certain lifecycle events happen by calling methods from EventHandler. For
> instance, when the app first starts, completes, aborts and etc.
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