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List:       activemq-dev
Subject:    [jira] [Updated] (AMQ-4705) Add keep alive support to shared file locker
From:       "Gary Tully (JIRA)" <jira () apache ! org>
Date:       2013-08-30 14:23:52
Message-ID: JIRA.12666328.1377872361847.60344.1377872632825 () arcas
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     [ https://issues.apache.org/jira/browse/AMQ-4705?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel \
]

Gary Tully updated AMQ-4705:
----------------------------

    Description: 
issue on nsfv4 with a master slave configuration, where both the slave and the master \
could obtain a lock. The following events occurred:

* master locks the file - does no more i/o to it – it's passive wrt the lock
* slave asks every 10 seconds if it can get the lock nfs come back and say no, \
                someone has it
* nfs dies not nicely
 ** nfsv4 is stateful - no callback for locks. 
 ** It has a grace period of 30 seconds to let all clients that had locks reclaim \
                them as locked
* master does not realize it needs to reclaim the lock and continues under the \
                assumption it has the lock.
* After 30 sec grace period, slave comes in and asks for the lock and it receives it.

  was:
issue on nsfv4 with a master slave configuration, where both the slave and the master \
could obtain a lock. The following events occurred:

* master locks the file - does no more i/o to it – it's passive wrt the lock
* slave asks every 10 seconds if it can get the lock nfs come back and say no, \
                someone has it
* nfs dies not nicely
 ** nfsv4 is stateful - no callback for locks. It has a grace period 30 seconds to \
                let all clients had locks reclaims locked
* master does not realize it needs to reclaim the lock and continues under the \
                assumption it has the lock.
* After 30 sec grace period, slave comes in and asks for the lock and it receives it.

    
> Add keep alive support to shared file locker
> --------------------------------------------
> 
> Key: AMQ-4705
> URL: https://issues.apache.org/jira/browse/AMQ-4705
> Project: ActiveMQ
> Issue Type: Bug
> Components: Message Store
> Affects Versions: 5.8.0
> Reporter: Gary Tully
> Assignee: Gary Tully
> Labels: kahadb, netapp, nfsv4, shared-file-lock
> Fix For: 5.9.0
> 
> 
> issue on nsfv4 with a master slave configuration, where both the slave and the \
> master could obtain a lock. The following events occurred:
> * master locks the file - does no more i/o to it – it's passive wrt the lock
> * slave asks every 10 seconds if it can get the lock nfs come back and say no, \
>                 someone has it
> * nfs dies not nicely
> ** nfsv4 is stateful - no callback for locks. 
> ** It has a grace period of 30 seconds to let all clients that had locks reclaim \
>                 them as locked
> * master does not realize it needs to reclaim the lock and continues under the \
>                 assumption it has the lock.
> * After 30 sec grace period, slave comes in and asks for the lock and it receives \
> it.

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