TreeCache redeploy problem in WebLogic 8.1

[justinm]

I am using TreeCache for second-level caching in Hibernate.

I have an EAR containing my EJB JAR, WAR and dependent libraries.

The initial deployment to WebLogic deploys and operates fine. If I then 'Stop' and 'Start' (same with 'Redeploy') my application through the WebLogic console, I continually get the stack trace below, and the deployment fails. Has anyone ever seen this? Is anyone using TreeCache in WebLogic that is able to redeploy an EAR?

16:11:03,429 ERROR [UDP] exception=java.io.IOException: java.lang.NoClassDefFoundError: org/jgroups/protocols/pbcast/JoinRsp
 at org.jgroups.util.Marshaller.read(Marshaller.java:85)
 at org.jgroups.Message.readExternal(Message.java:491)
 at org.jgroups.protocols.UDP.handleIncomingUdpPacket(UDP.java:686)
 at org.jgroups.protocols.UDP$UcastReceiver.run(UDP.java:1294)
 at java.lang.Thread.run(Thread.java:534)

Hibernate 2.1.8

Windows XP Pro sp1

WebLogic 8.1sp4 (JDK 1.4.2_05)

Oracle 8.1.6

TreeCache v1.2.1

JGroups 2.2.7

concurrent-1.3.3.jar

jboss-(common, jmx, system)-4.0.1sp1.jar

I also tried using the following bundled JARs that come with the Hibernate 2.1.8 distro and encountered the same issue:

jboss-cache.jar
jboss-common.jar
jboss-jmx.jar
jboss-system.jar

[swami_venkat]

Have u tried putting all dependent jars for the cache in the classpath setting in the weblogic startup script?

[justinm]

I put the following JARs in the WebLogic startup classpath (switched to JBoss Cache 1.1.1 as that is what ships with Hibernate 2.1.8):

c:\lib\commons-logging-1.0.4.jar;c:\lib\concurrent-1.3.3.jar;c:\lib\jboss-cache-1.1.1.jar;c:\lib\jboss-common-4.0.0.jar;c:\lib\jboss-jmx-4.0.0.jar;c:\lib\jboss-system-4.0.0.jar;c:\lib\jgroups-2.2.7.jar;c:\lib\log4j-1.2.8.jar

Unfortunately, I am now experiencing the known ClassLoader issue after redeploying (Start | Stop) my app within the WebLogic console:

http://docs.jboss.org/jbcache/current/faq/html/#d0e395

The docs mention a serialization work-around, however this is not feasible as Hibernate has complete control over the cache implementation.

Are there any plans to eliminate the dependency of JBoss Cache on being loaded by the system classloader?

[gedel]

Hi, Is there any idea?
(i've got the same problem)

[gedel]

thanks to all.

solved by upgrading jgroups as mentioned http://jboss.com/?module=bb&op=viewtopic&t=69157