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From: "Timothy Bish (JIRA)" <jira@apache.org>
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Subject: [jira] [Commented] (AMQ-4694) add support for flock-based shared
 lock file (patch included)
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    [ https://issues.apache.org/jira/browse/AMQ-4694?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13751633#comment-13751633 ] 

Timothy Bish commented on AMQ-4694:
-----------------------------------

Nice work on the patch.  The tricky bit I see here is that I don't think we can add this because of the use of the JNA libs which are LGPL licensed.  From my understanding we can't include these in Apache products.  

http://www.apache.org/legal/resolved.html#category-x


                
> add support for flock-based shared lock file (patch included)
> -------------------------------------------------------------
>
>                 Key: AMQ-4694
>                 URL: https://issues.apache.org/jira/browse/AMQ-4694
>             Project: ActiveMQ
>          Issue Type: Improvement
>          Components: Broker
>    Affects Versions: 5.8.0
>            Reporter: Carl Harris
>         Attachments: patch.txt, README.patch.txt
>
>
> This issue provides a patch to add support for using native flock (2) based lock files.  As discussed in AMQ-4378, using the Shared File System Master/Slave configuration on an OCFS2 filesystem is complicated by Java's use of POSIX locks.  See the attached README for motivation and description of the approach.
> With this patch, a user can configure KahaDB to use a shared native lock file (using flock) as follows:
> {code:xml}
> <persistenceAdapter>
>   <kahaDB ...>
>     <locker>
>        <shared-native-file-locker/>
>     </locker>
>   </kahaDB>
> </persistenceAdapter>
> {code}

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