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From "Mario Siegenthaler" <msiegentha...@inventsoft.ch>
Subject Re: ActiveMQ and Linux NFS
Date Thu, 06 Sep 2007 11:32:35 GMT
You can specify your own jdbc adapter class (see
http://activemq.apache.org/jdbc-support.html).
What I'd do is write a mysql adapter (extend the mysql one) and
override the locking statements. You can also rename the mysql adapter
for AMQ 5 (or svn revision 518161/518164) into
MySqlPropertLockingAdaptor (or whatever). Then you configure ActiveMQ
to use this Adapter (see link above) and it should work.. in theory :)

We do the same thing for a SQL-Server locking-problem that isn't fixed
until 5.0.

Mario


On 9/5/07, jdemic <john.demic@gmail.com> wrote:
>
> to further respond to my own posts,
>
> just tried to get mysql masterslave going and ran into this bug:
>
> http://www.nabble.com/Master-Slave-locking-with-MYSQL-is-not-working-with-4.1.1-tf3399897s2354.html#a9475786
>
> is there any way to get redundancy working with 4.1.1??
>
>
>
> jdemic wrote:
> >
> > To further complicate this, I just tested failover and the following
> > happened:
> >
> > - i kill -9'd activemq on the master server.
> > - on the slave server, activemq was still spinning on the filesystem lock
> > as per my last email.
> > - when i started up the master again, it started spinning on the
> > filesystem lock and no broker was active.
> > - deleting the data directory from the nfs mount and restarting activemq
> > on the master allowed me to restart the master.
> >
> > My configurations follow.  I would appreciate if someone on the activemq
> > team could get back to me, this is the second clustering option i've now
> > tried that didn't work.  The first such issue was posted here:
> > http://www.nabble.com/Slaving-issue-on-4.1.1-tf4255212s2354.html#a12110238
> > again w/o any response.
> >
> > thx,
> > -jd
> > master:
> > <beans>
> >
> >   <bean
> > class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"/>
> >
> >   <broker brokerName="localhost" useJmx="false"
> > xmlns="http://activemq.org/config/1.0">
> >
> >     <persistenceAdapter>
> >         <journaledJDBC dataDirectory="/network/activemq"/>
> >     </persistenceAdapter>
> >
> >     <transportConnectors>
> >        <transportConnector name="openwire" uri="tcp://localhost:61616"
> > discoveryUri="multi
> > cast://default"/>
> >     </transportConnectors>
> >
> >   </broker>
> > </beans>
> >
> > slave:
> >
> > <beans>
> >
> >   <bean
> > class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"/>
> >
> >   <broker brokerName="slave" useJmx="false"
> > xmlns="http://activemq.org/config/1.0">
> >
> >     <persistenceAdapter>
> >         <journaledJDBC dataDirectory="/network/activemq"/>
> >     </persistenceAdapter>
> >
> >     <transportConnectors>
> >        <transportConnector name="openwire" uri="tcp://localhost:61616"
> > discoveryUri="multi
> > cast://default"/>
> >     </transportConnectors>
> >
> >   </broker>
> > </beans>
> >
> > jdemic wrote:
> >>
> >> Hey All,
> >>
> >> I'm attempting to setup activemq in a master/slave configuration as
> >> follows:
> >>
> >> http://activemq.apache.org/shared-file-system-master-slave.html
> >>
> >> I'm setting this up ontop of redhat es3 using the shared journal on an
> >> NFS mount.  When i start the slave, the following occurs:
> >>
> >> faultPersistenceAdapterFactory - Journal i locked... waiting 10 seconds
> >> for the journal to be unlocked.
> >>
> >> This seems like the appopriate behavior (ie, the slave is spinning on the
> >> lock waiting for it to be released.)  The issue is, however, that
> >> activemq exits after an hour and a half of so of attempting this.  I'm
> >> not sure if the issue is due to some interaction between java and nfs
> >> locking or an issue with activemq.  Curious if anyone else has
> >> experienced this.
> >>
> >> Thanks,
> >> -jd
> >>
> >
> >
>
> --
> View this message in context: http://www.nabble.com/ActiveMQ-and-Linux-NFS-tf4384669s2354.html#a12511594
> Sent from the ActiveMQ - User mailing list archive at Nabble.com.
>
>

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