[jboss-jira] [JBoss JIRA] (JGRP-1901) GMS: view installation via two-phase commit

[Bela Ban (JIRA)]

Bela Ban created JGRP-1901:
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             Summary: GMS: view installation via two-phase commit
                 Key: JGRP-1901
                 URL: https://issues.jboss.org/browse/JGRP-1901
             Project: JGroups
          Issue Type: Feature Request
            Reporter: Bela Ban
            Assignee: Bela Ban
             Fix For: 3.6.1


Investigate whether view installation should optionally be done via 2PC. Example:
* View is A,B,C,D, splits into A,B and C,D
* Before AB is installed in A and B, view A,B,C is installed
** (C hasn't been suspected yet. This can happen with {{FD}})

Infinispan's rebalancing algorithm has problems with this, as it tries to assign state to C which however isn't reachable from the A,B side of the network partition. It would be better if A,B,C,D went directly to A,B and C,D

Investigate whether we should add a property to {{GMS}} which defines whether to use 2PC for view installation (default would be {{false}}). The algorithm would work as follows:
* Send a {{PREPARE_VIEW(view)}} message
* When all responses have been received -> send a {{COMMIT_VIEW}} message
* Else
** Inject SUSPECT(C) event for all misisng acks OR
** Set a timer to go off in N ms -> when it fires, send the {{COMMIT_VIEW}} msg
** If another view is installed before the tmer goes off (e.g. A,B) -> kill the timer



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