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Posted to yarn-issues@hadoop.apache.org by "Daniel Templeton (JIRA)" <ji...@apache.org> on 2017/05/12 18:00:06 UTC
[jira] [Issue Comment Deleted] (YARN-4209) RMStateStore FENCED
state doesn't work due to updateFencedState called by
stateMachine.doTransition
[ https://issues.apache.org/jira/browse/YARN-4209?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Daniel Templeton updated YARN-4209:
-----------------------------------
Comment: was deleted
(was: Replaced gendered quote it summary)
> RMStateStore FENCED state doesn't work due to updateFencedState called by stateMachine.doTransition
> ---------------------------------------------------------------------------------------------------
>
> Key: YARN-4209
> URL: https://issues.apache.org/jira/browse/YARN-4209
> Project: Hadoop YARN
> Issue Type: Bug
> Components: resourcemanager
> Affects Versions: 2.7.2
> Reporter: zhihai xu
> Assignee: zhihai xu
> Priority: Critical
> Fix For: 2.8.0, 2.7.2, 3.0.0-alpha1
>
> Attachments: YARN-4209.000.patch, YARN-4209.001.patch, YARN-4209.002.patch, YARN-4209.branch-2.7.patch
>
>
> RMStateStore FENCED state doesn’t work due to {{updateFencedState}} called by {{stateMachine.doTransition}}. The reason is
> {{stateMachine.doTransition}} called from {{updateFencedState}} is embedded in {{stateMachine.doTransition}} called from public API(removeRMDelegationToken...) or {{ForwardingEventHandler#handle}}. So right after the internal state transition from {{updateFencedState}} changes the state to FENCED state, the external state transition changes the state back to ACTIVE state. The end result is that RMStateStore is still in ACTIVE state even after {{notifyStoreOperationFailed}} is called. The only working case for FENCED state is {{notifyStoreOperationFailed}} called from {{ZKRMStateStore#VerifyActiveStatusThread}}.
> For example: {{removeRMDelegationToken}} => {{handleStoreEvent}} => enter external {{stateMachine.doTransition}} => {{RemoveRMDTTransition}} => {{notifyStoreOperationFailed}} =>{{updateFencedState}}=>{{handleStoreEvent}}=> enter internal {{stateMachine.doTransition}} => exit internal {{stateMachine.doTransition}} change state to FENCED => exit external {{stateMachine.doTransition}} change state to ACTIVE.
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