[jboss-jira] [JBoss JIRA] (JGRP-1911) Use consensus for some subsystems

Use consensus for some subsystems --------------------------------- Key: JGRP-1911 URL: https://issues.jboss.org/browse/JGRP-1911 Project: JGroups Issue Type: Feature Request Reporter: Bela Ban Assignee: Bela Ban Fix For: 4.1 Provide options for several subsystems to run with consensus, e.g. * {{SEQUENCER}} * {{CENTRAL_LOCK}} * {{COUNTER}} * {{TOA}} * Clustered singletons etc For example, with the current impl of distributed counters ({{COUNTER}}), the same counter can be available multiple times if we have a split brain. It is currently up to the user to merge counters with different values after a split brain heals. This is OK, but we should provide a second implementation, based on jgroups-raft, which uses consensus to determine the counter maintainer in a split brain scenario. This will forfeit availability in favor of consistency.