[jbosscache-users] Issue with JBC on Tomcat 5.5

[Manik Surtani]

Have you enabled Tomcat clustering as well?  By the look of that stack  
trace Tomcat clustering is enabled, and it may use a different version  
of JGroups.  If you want to use TOmcat clustering as well, make sure  
your multicast address and ports don't overlap.

http://wiki.jboss.org/wiki/Wiki.jsp?page=PromiscuousTraffic


On 12 Nov 2007, at 05:17, Mamta, Jain wrote:

> Hi All,
>
> We are having trouble using JBC Habanero version 2.0.0.0 GA for  
> enabling Distributed Caching. The error encountered as appearing in  
> the log is :
>
> Nov 2, 2007 6:00:07 AM org.jgroups.protocols.TP$IncomingPacket run
> WARNING: packet from a.b.c.d:45564 has different version (0.0.0)  
> from ours (2.5.0). Packet is discarded
>
> Environment :
> Tomcat 5.5.20, Multicast
> Starting Catalina with the following option to avoid the "Problem  
> creating sockets" :
>     -Djava.net.preferIPv4Stack=true
>
> What I am trying to do is, use JBC for distributing cache over the  
> Tomcats cluster established with multicasting. The steps followed  
> were :
>
>     1. modified ip address & port for the UDP/mcastaddr and port in  
> replSync-service.xml
>     2. commented off transaction manager tag in the xml, as we dont  
> have the requirement for Transactional Caching
>     3. created a client that would enable/initialize the JBC caching :
>
>         CacheFactory factory = DefaultCacheFactory.getInstance();
>         cache = factory.createCache(<url of the replSync- 
> service.xml>);
>
> Whats happening is :
>
>     1. JGroups seems to be doing whats required as I see the  
> following in the log :
>
>         INFO: JGroups version: 2.5.0
>         -------------------------------------------------------
>         GMS: address is a.b.c.d:32838
>
>     2. And further the following is logged :
>
>     INFO: viewAccepted(): [a.b.c.d:32838|0] [a.b.c.d:32838]
>     Nov 2, 2007 6:00:06 AM org.jboss.cache.CacheImpl internalStart
>     INFO: CacheImpl local address is a.b.c.d:32838
>     Nov 2, 2007 6:00:06 AM org.jboss.cache.CacheImpl internalStart
>     INFO: JBoss Cache version: JBossCache 'Habanero' 2.0.0.GA[ $Id:  
> Version.java,v 1.35 2007/08/01 16:52:13 msurtani Exp $]
>     Nov 2, 2007 6:00:07 AM  
> org.apache.catalina.cluster.mcast.McastServiceImpl$ReceiverThread run
>     WARNING: Error receiving mcast package. Sleeping 500ms
>         java.lang.ArrayIndexOutOfBoundsException
>          at java.lang.System.arraycopy(Native Method)
>          at  
> org 
> .apache 
> .catalina.cluster.mcast.McastMember.getMember(McastMember.java:174)
>          at  
> org 
> .apache 
> .catalina 
> .cluster.mcast.McastServiceImpl.receive(McastServiceImpl.java:210)
>          at org.apache.catalina.cluster.mcast.McastServiceImpl 
> $ReceiverThread.run(McastServiceImpl.java:254)
>     Nov 2, 2007 6:00:07 AM org.jgroups.protocols.TP$IncomingPacket run
>     WARNING: packet from a.b.c.d:45564 has different version (0.0.0)  
> from ours (2.5.0). Packet is discarded
>     3. Is the observed error ignorable ?
>     4. I have not started the other node in the cluster as there are  
> hundreds of lines appearing in the log with Packet discarded message.
>
> Have I done enough, or missing something obvious as the documents do  
> direct us to do just the above.
>
> Best Regards,
> Jigyaasa_Jbosscache
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--
Manik Surtani
Lead, JBoss Cache
manik at jboss.org






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