GMS: view installation by consensus ----------------------------------- 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: 3.6.2 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