[infinispan-issues] [JBoss JIRA] (ISPN-2578) Two PrepareCommands in parallel cause ConcurrentModificationException

[RH Bugzilla Integration (JIRA)]

     [ https://issues.jboss.org/browse/ISPN-2578?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

RH Bugzilla Integration updated ISPN-2578:
------------------------------------------

        Bugzilla Update: Perform
    Bugzilla References: https://bugzilla.redhat.com/show_bug.cgi?id=882990

    
> Two PrepareCommands in parallel cause ConcurrentModificationException
> ---------------------------------------------------------------------
>
>                 Key: ISPN-2578
>                 URL: https://issues.jboss.org/browse/ISPN-2578
>             Project: Infinispan
>          Issue Type: Bug
>            Reporter: Radim Vansa
>            Assignee: Mircea Markus
>
> Situation:
> 1) Node A broadcasts PrepareCommand to nodes B, C
> 2) Node A leaves cluster, causing new topology to be installed
> 3) The command arrives to B and C, with lower topology than the current one
> 4) Both B and C forward the command to node D
> 5) D executes the two commands in parallel and finds out that A has left, therefore executing RollbackCommand
> In {{AbstractTxLockingInterceptor.visitRollbackCommand}} we call {{LockManagerImpl.unlockAll}} which iterates over the keys and unlocks them. As these two prepares aren't synchronized over the {{lockedKeys}} set, one may unlock and remove these keys while the other is iterating through them, causing {{ConcurrentModificationException}}.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira