[jboss-jira] [JBoss JIRA] (JGRP-1639) Locking: lock name with negative hashCode() throws out of bound exception

[Bela Ban (JIRA)]

     [ https://issues.jboss.org/browse/JGRP-1639?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Bela Ban updated JGRP-1639:
---------------------------

    Comment: was deleted

(was: Also fixed in 3.3.1)

    
> Locking: lock name with negative hashCode() throws out of bound exception
> -------------------------------------------------------------------------
>
>                 Key: JGRP-1639
>                 URL: https://issues.jboss.org/browse/JGRP-1639
>             Project: JGroups
>          Issue Type: Bug
>            Reporter: Bela Ban
>            Assignee: Bela Ban
>             Fix For: 3.3.1, 3.4
>
>
> [Steve Luebbe]
> Based on the code in the org.jgroups.protocols.Locking it tries to calculate an index based on the lock name (code in next 2 lines):
> {code}
>     protected Lock _getLock(String lock_name) {
>         int index=lock_name != null? lock_name.hashCode() % locks.length : 0;
>         return locks[index];
>     }
> {code}
>  
> When debugging I can see that:
> lock_name = dpa_project
> lock_name.hashCode() = -1316662737
> locks.length = 10
> SOLUTION: use Math.abs() on the hash code

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