[infinispan-issues] [JBoss JIRA] (ISPN-4574) PartitionHandling: consider less than numOwners partitions

[Dan Berindei (JIRA)]

    [ https://issues.jboss.org/browse/ISPN-4574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12992867#comment-12992867 ] 

Dan Berindei commented on ISPN-4574:
------------------------------------

This should also cover the replicated cache case, since replicated mode is equivalent to distributed mode with {{numOwners = +Inf}}.

> PartitionHandling: consider less than numOwners partitions
> ----------------------------------------------------------
>
>                 Key: ISPN-4574
>                 URL: https://issues.jboss.org/browse/ISPN-4574
>             Project: Infinispan
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: Core
>            Reporter: Mircea Markus
>            Assignee: Dan Berindei
>            Priority: Critical
>              Labels: partition_handling
>
> If the following two conditions are simultaneously met during a split brain:
> a) less than numOwners nodes leave
> b) two clusters are formed having that size
> Then both partitions would be considered as available. E.g. a cluster of 6 nodes with numOwners=4, with a split brain resulting in 3 and 3 nodes partitions. 
> We should add some logic to prevent this situation, e.g. by requiring the remaining partition to have at least numOwners members.



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