[jboss-dev] JGroup Oddness.. GMS?

Brian Stansberry brian.stansberry at redhat.com
Mon Dec 14 17:17:13 EST 2009


It's JGroups. Javagroups was the original name of the JGroups project 
long ago.

On 12/14/2009 04:14 PM, mike cann wrote:
> Hi Cheers,
>
> I have just posted the same question to the JBoss forums:
> http://community.jboss.org/thread/145816
>
> javagroups-users at lists.sourceforge.net
> <mailto:javagroups-users at lists.sourceforge.net> is that JGroups or just
> generic java?
>
> Mike
>
>
> 2009/12/14 Brian Stansberry <brian.stansberry at redhat.com
> <mailto:brian.stansberry at redhat.com>>
>
>     Your best bet is to use the JGroups user mail list
>
>     javagroups-users at lists.sourceforge.net
>     <mailto:javagroups-users at lists.sourceforge.net>
>
>     https://lists.sourceforge.net/lists/listinfo/javagroups-users
>
>     On 12/14/2009 03:24 PM, Ales Justin wrote:
>      > Try the forums, user forums in particular.
>      > * http://community.jboss.org/
>      >
>      > mike cann wrote:
>      >> Hi List,
>      >>
>      >> Only just joined, im not sure if this is the right place to post
>     or not
>      >> so let me know if it isnt.
>      >>
>      >> Im trying to use JGroups in a project.
>      >>
>      >> First things first tried running a very simple example but
>     couldnt get
>      >> the two machines to talk to each other, i read all the
>     documentation but
>      >> still couldnt work out why.
>      >>
>      >> I tried using the webstart demo of the draw (found here
>      >> http://www.jgroups.org/demos.html) thats actually the
>     replicatedcache
>      >> demo and to my surprise it worked.
>      >>
>      >> I downloaded the .jar that the jnlp uses and ran it from the command
>      >> line and got:
>      >>
>      >>
>      >> ---------------------------------------------------------
>      >> GMS: address is 192.168.1.69:54939
>     <http://192.168.1.69:54939><http://192.168.1.69:54939>
>      >> (cluster=replcache-cluster)
>      >> ---------------------------------------------------------
>      >>
>      >>
>      >>
>      >> Now when I tried to run the ReplCacheDemo from within the
>      >> jgroups-all.jar I get the following:
>      >>
>      >>
>      >>
>      >> java -cp jgroups-all.jar org.jgroups.demos.ReplCacheDemo
>      >>
>      >> 14-Dec-2009 20:17:24 org.jgroups.logging.JDKLogImpl info
>      >> INFO: JGroups version: 2.8.0.CR7
>      >>
>      >> -------------------------------------------------------------------
>      >> GMS: address=M-Win7-38823, cluster=replcache-cluster, physical
>      >> address=fe80:0:0:
>      >> 0:69e5:8edf:3e90:e817:62330
>      >> -------------------------------------------------------------------
>      >>
>      >>
>      >> So im not sure whats going on here, it looks like the jnlp demo
>     is using
>      >> a different GMS (?) settings to the one in jgroups-all.jar, so I
>     tried
>      >> to take the udp.xml file from the jnlp jar and use it in a simple
>      >> example and I get the follwing errors:
>      >>
>      >>
>      >>
>      >> 14-Dec-2009 21:12:12 org.jgroups.logging.JDKLogImpl info
>      >> INFO: JGroups version: 2.8.0.CR7
>      >> Exception in thread "main" org.jgroups.ChannelException: unable
>     to setup
>      >> the protocol stack
>      >>          at org.jgroups.JChannel.init(JChannel.java:1706)
>      >>          at org.jgroups.JChannel.<init>(JChannel.java:243)
>      >>          at org.jgroups.JChannel.<init>(JChannel.java:226)
>      >>          at jgroupssimple.Main.main(Main.java:25)
>      >> Caused by: java.lang.Exception: unable to load class for protocol
>      >> (either as an absolute -  - or relative - org.jgroups.protocols. -
>      >> package name)!
>      >>          at
>      >>
>     org.jgroups.stack.Configurator$ProtocolConfiguration.createLayer(Configurator.java:1244)
>      >>          at
>      >>
>     org.jgroups.stack.Configurator$ProtocolConfiguration.access$000(Configurator.java:1135)
>      >>          at
>      >>
>     org.jgroups.stack.Configurator.createProtocols(Configurator.java:368)
>      >>          at
>      >>
>     org.jgroups.stack.Configurator.setupProtocolStack(Configurator.java:88)
>      >>          at
>      >>
>     org.jgroups.stack.Configurator.setupProtocolStack(Configurator.java:54)
>      >>          at
>     org.jgroups.stack.ProtocolStack.setup(ProtocolStack.java:452)
>      >>          at org.jgroups.JChannel.init(JChannel.java:1702)
>      >>          ... 3 more
>      >> Java Result: 1
>      >> BUILD SUCCESSFUL (total time: 0 seconds)
>      >>
>      >>
>      >>
>      >> Anyone any clues as to whats going on here?
>      >> Cheers for your time :)
>      >> Mike
>      >>
>      >>
>      >>
>      >>
>      >>
>      >> --
>      >> Mike Cann
>      >> http://www.mikecann.co.uk/
>      >> http://www.artificialgames.co.uk/
>      >>
>      >>
>      >>
>     ------------------------------------------------------------------------
>      >>
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>
>     --
>     Brian Stansberry
>     Lead, AS Clustering
>     JBoss by Red Hat
>     _______________________________________________
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>
>
>
> --
> Mike Cann
> http://www.mikecann.co.uk/
> http://www.artificialgames.co.uk/
>
>
>
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-- 
Brian Stansberry
Lead, AS Clustering
JBoss by Red Hat



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