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https://issues.apache.org/jira/browse/TWILL-240?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16113163#comment-16113163
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ASF GitHub Bot commented on TWILL-240:
--------------------------------------
Github user chtyim commented on a diff in the pull request:
https://github.com/apache/twill/pull/58#discussion_r131210382
--- Diff:
twill-yarn/src/main/java/org/apache/twill/internal/appmaster/ApplicationMasterService.java
---
@@ -291,6 +301,23 @@ public void run() {
// Since all the runnables are now stopped, it is okay to stop the
poller.
stopPoller.shutdownNow();
cleanupDir();
+ if (eventHandler != null) {
+ if (finalStatus == null) {
+ // if finalStatus is not set, the application must be stopped by a
SystemMessages#STOP_COMMAND
+ eventHandler.killed(twillRuntimeSpec.getTwillAppName(),
twillRuntimeSpec.getTwillAppRunId());
+ }
+ switch (finalStatus) {
--- End diff --
This may have NPE. Should have a `else`.
> 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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