[jira] [Updated] (IGNITE-16012) Raft changePeers behavior must be updated to support rebalance needs

["Vyacheslav Koptilin (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IGNITE-16012?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Vyacheslav Koptilin updated IGNITE-16012:
-----------------------------------------
    Labels: ignite-3  (was: )

> Raft changePeers behavior must be updated to support rebalance needs
> --------------------------------------------------------------------
>
>                 Key: IGNITE-16012
>                 URL: https://issues.apache.org/jira/browse/IGNITE-16012
>             Project: Ignite
>          Issue Type: Task
>            Reporter: Kirill Gusakov
>            Priority: Major
>              Labels: ignite-3
>
> We need to change org.apache.ignite.raft.jraft.rpc.impl.RaftGroupServiceImpl#changePeers to support the following scenarios:
> - changePeers needs to support updating of in-progress changePeers:
> {code:java}
> if (leaderNode.cfgCtx.stage == STAGE_CATCHING_UP) {
>   <update the list of catching up peers>
>   return OK;
> } else if (leaderNode.cfgCtx.stage == STAGE_NONE) {
>   if (leaderNode.currentPeers == newPeers) {
>     rebalanceListener.onRebalanceCommited();
>     return OK;
>   } else {
>     <start new changePeers>
>     return OK;
>   }
> } else {
>   return BUSY; // it should be a signal to postpone new changePeers call
> }{code}
> - changePeers must be an asynchronous  operation and returns as soon as possible (after successful updating catching up nodes, if needed)
>  
> (Phase 1)



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