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https://issues.apache.org/jira/browse/YARN-2030?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14026336#comment-14026336
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Hudson commented on YARN-2030:
------------------------------
FAILURE: Integrated in Hadoop-Yarn-trunk #579 (See
[https://builds.apache.org/job/Hadoop-Yarn-trunk/579/])
YARN-2030. Augmented RMStateStore with state machine. Contributed by Binglin
Chang (jianhe:
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1601537)
* /hadoop/common/trunk/hadoop-yarn-project/CHANGES.txt
> Use StateMachine to simplify handleStoreEvent() in RMStateStore
> ---------------------------------------------------------------
>
> Key: YARN-2030
> URL: https://issues.apache.org/jira/browse/YARN-2030
> Project: Hadoop YARN
> Issue Type: Improvement
> Reporter: Junping Du
> Assignee: Binglin Chang
> Fix For: 2.5.0
>
> Attachments: YARN-2030.v1.patch, YARN-2030.v2.patch,
> YARN-2030.v3.patch, YARN-2030.v4.patch, YARN-2030.v5.patch, YARN-2030.v6.patch
>
>
> Now the logic to handle different store events in handleStoreEvent() is as
> following:
> {code}
> if (event.getType().equals(RMStateStoreEventType.STORE_APP)
> || event.getType().equals(RMStateStoreEventType.UPDATE_APP)) {
> ...
> if (event.getType().equals(RMStateStoreEventType.STORE_APP)) {
> ...
> } else {
> ...
> }
> ...
> try {
> if (event.getType().equals(RMStateStoreEventType.STORE_APP)) {
> ...
> } else {
> ...
> }
> }
> ...
> } else if (event.getType().equals(RMStateStoreEventType.STORE_APP_ATTEMPT)
> || event.getType().equals(RMStateStoreEventType.UPDATE_APP_ATTEMPT)) {
> ...
> if (event.getType().equals(RMStateStoreEventType.STORE_APP_ATTEMPT)) {
> ...
> } else {
> ...
> }
> ...
> if (event.getType().equals(RMStateStoreEventType.STORE_APP_ATTEMPT)) {
> ...
> } else {
> ...
> }
> }
> ...
> } else if (event.getType().equals(RMStateStoreEventType.REMOVE_APP)) {
> ...
> } else {
> ...
> }
> }
> {code}
> This is not only confuse people but also led to mistake easily. We may
> leverage state machine to simply this even no state transitions.
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