[infinispan-issues] [JBoss JIRA] (ISPN-2420) Increment the topology id when a node leaves the cache

Increment the topology id when a node leaves the cache ------------------------------------------------------ Key: ISPN-2420 URL: https://issues.jboss.org/browse/ISPN-2420 Project: Infinispan Issue Type: Feature Request Components: State transfer Affects Versions: 5.2.0.Beta2 Reporter: Dan Berindei Assignee: Dan Berindei Fix For: 6.0.0.Final We currently increment the topology id only when we "rebalance" the consistent hash (i.e. we add new owners). This allows us to to do some optimizations after a leave, like not forwarding commands (because there are no new owners). Unfortunately, it is not very intuitive, because it doesn't match how JGroups works, so it can cause bugs like ISPN-2417. Additionally, it turns out there are many places where we care that a node left, so the code is more complex to handle this (e.g. TransactionTable.useStrictTopologyIdComparison()), or it is more slow for the common case when there is no leaver (e.g. LocalTransaction.getCommitNodes()).