[jboss-jira] [JBoss JIRA] (JGRP-1830) SEQUENCER2: handle coord failover

[Bela Ban (JIRA)]

    [ https://issues.jboss.org/browse/JGRP-1830?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13158744#comment-13158744 ] 

Bela Ban edited comment on JGRP-1830 at 2/4/16 10:21 AM:
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Write this as a service which dishes out global sequence numbers could also be used by other protocols, e.g. {{TOA}}.

On a graceful shutdown of the coordinator, it could send a message to all members, announcing the new coordinator and reject as {{GET-SEQNO}} messages with a redirection response. After sending its highest seqno to the new coord and getting it acked, it could shut down.

A crash of the coord could lead to a reconciliation protocol run by the new coord, which gathers the highest seqnos from all members, to determine the new highest seqno.

Perhaps we need to deliver messages in non monotonic order, e.g. 1,2,4,5,8 could be an acceptable global order sequence.


was (Author: belaban):
Note that a service which dishes out global sequence numbers could also be used by other protocols, e.g. {{TOA}}

> SEQUENCER2: handle coord failover
> ---------------------------------
>
>                 Key: JGRP-1830
>                 URL: https://issues.jboss.org/browse/JGRP-1830
>             Project: JGroups
>          Issue Type: Feature Request
>            Reporter: Bela Ban
>            Assignee: Bela Ban
>             Fix For: 4.1
>
>
> Continuation of JGRP-1821; handle failure cases



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