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https://issues.apache.org/jira/browse/FLINK-24038?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17483670#comment-17483670
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Yang Wang commented on FLINK-24038:
-----------------------------------
After introducing the multiple component leader election service, we now only
have two ConfigMaps.
1. "<clusterId>-cluster-config-map"
* Leader election for all the components(e.g. restserver, dispatcher,
resourcemanager, jobmanager)
* JobGraph store
* Running job registry
2. "<clusterId>-<jobId>-config-map"
* Checkpoint store and counter
For jobmanager, the leader election and checkpoint store are using different
ConfigMaps. I think it could happen the non-leader jobmanager overwrite the
checkpoint store unexpectedly. Because we do not have the
"get-check_leadership-update" transactional operation.
cc [~trohrmann] Do you think this is a valid concern?
> DispatcherResourceManagerComponent fails to deregister application if no
> leading ResourceManager
> ------------------------------------------------------------------------------------------------
>
> Key: FLINK-24038
> URL: https://issues.apache.org/jira/browse/FLINK-24038
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Coordination
> Affects Versions: 1.14.0
> Reporter: Till Rohrmann
> Assignee: Till Rohrmann
> Priority: Critical
> Labels: pull-request-available
> Fix For: 1.15.0
>
>
> With FLINK-21667 we introduced a change that can cause the
> {{DispatcherResourceManagerComponent}} to fail when trying to stop the
> application. The problem is that the {{DispatcherResourceManagerComponent}}
> needs a leading {{ResourceManager}} to successfully execute the
> stop/deregister application call. If this is not the case, then it will fail
> fatally. In the case of multiple standby JobManager processes it can happen
> that the leading {{ResourceManager}} runs somewhere else.
> I do see two possible solutions:
> 1. Run the leader election process for the whole JobManager process
> 2. Move the registration/deregistration of the application out of the
> {{ResourceManager}} so that it can be executed w/o a leader
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