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https://issues.apache.org/jira/browse/RATIS-661?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16919850#comment-16919850
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Tsz Wo Nicholas Sze commented on RATIS-661:
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> Should we support an api called groupExists in RaftServer? ...
getGroupInfos covers groupExists, although it will fail with
GroupMismatchException when a group does not exist.
> Add call in state machine to handle group removal
> -------------------------------------------------
>
> Key: RATIS-661
> URL: https://issues.apache.org/jira/browse/RATIS-661
> Project: Ratis
> Issue Type: Bug
> Reporter: Lokesh Jain
> Assignee: Lokesh Jain
> Priority: Major
> Attachments: RATIS-661.001.patch, RATIS-661.002.patch,
> RATIS-661.003.patch, RATIS-661.004.patch, RATIS-661.005.patch
>
>
> Currently during RaftServerProxy#groupRemoveAsync there is no way for
> stateMachine to know that the RaftGroup will be removed. This Jira aims to
> add a call in the stateMachine to handle group removal.
> It also changes the logic of groupRemoval api to remove the RaftServerImpl
> from the RaftServerProxy#impls map after the shutdown is complete. This is
> required to synchronize the removal with the corresponding api of
> RaftServer#getGroupIds. RaftServer#getGroupIds uses the RaftServerProxy#impls
> map to get the groupIds.
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