[infinispan-issues] [JBoss JIRA] Created: (ISPN-1077) Multiple leaves are not handled correctly with DIST

[Mircea Markus (JIRA)]

Multiple leaves are not handled correctly with DIST 
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                 Key: ISPN-1077
                 URL: https://issues.jboss.org/browse/ISPN-1077
             Project: Infinispan
          Issue Type: Bug
          Components: Distributed Cache
    Affects Versions: 4.2.0.Final
            Reporter: Mircea Markus
            Assignee: Manik Surtani
             Fix For: 4.2.2.FINAL, 5.0.0.FINAL


When multiple caches are leaving at the same time(i.e. the diff between jgroups views is more than one address), Infinispan ends up with an inconsistent hash function: it is aware about nodes that are no longer present in the cluster. 
The root cause of the problem is in DistributionManagerImpl.rehash(...):
- the list of leavers is determined as follows:    
Address leaver = MembershipArithmetic.getMemberLeft(oldMembers, newMembers);
- this method always assumes a single leaver, but there can be many.

Unit test attached.


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