[javagroups-users] Problem using jgroups in a tomcat webapp

[<dt...@co...>]

Hi,

I'm trying to upgrade an older javagroups version to jgroups 2.2.5 in a 
tomcat 4.1 web application. But this seems to cause some trouble with 
logging.

I have jgroups-all.jar and log4j-1.2.8 in WEB-INF/lib. I assume the 
below commons logging classes are loaded by tomcat.

Any suggestions are welcome.

java.lang.ExceptionInInitializerError
	at org.jgroups.JChannel.<init>(JChannel.java:51)
	at 
dk.netnord.cmd.clustering.jgroups.JavaGroupsSender.startUp(JavaGroupsSender.java:92)
	at 
dk.netnord.cmd.clustering.ClusterCommunicator.initializeMessagingFramework(ClusterCommunicator.java:707)
	at 
dk.netnord.cmd.clustering.ClusterCommunicator$CCConfigurationListener.configurationValueUpdated(ClusterCommunicator.java:764)
	at 
dk.netnord.cmd.clustering.ClusterCommunicator.<init>(ClusterCommunicator.java:207)
	at dk.netnord.cmd.CMD.configureClusterService(CMD.java:293)
	at dk.netnord.cmd.CMD.access$000(CMD.java:48)
	at dk.netnord.cmd.CMD$1.run(CMD.java:128)
Caused by: org.apache.commons.logging.LogConfigurationException: 
org.apache.commons.logging.LogConfigurationException: No suitable Log 
constructor [Ljava.lang.Class;@3cb075 for 
org.apache.commons.logging.impl.Log4JLogger
	at 
org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:532)
	at 
org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:272)
	at 
org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:246)
	at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:395)
	at org.jgroups.util.Queue.<clinit>(Queue.java:52)
	... 8 more
Caused by: org.apache.commons.logging.LogConfigurationException: No 
suitable Log constructor [Ljava.lang.Class;@3cb075 for 
org.apache.commons.logging.impl.Log4JLogger
	at 
org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryImpl.java:432)
	at 
org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:525)
	... 12 more
Caused by: java.lang.NoClassDefFoundError: org/apache/log4j/Logger
	at java.lang.Class.getDeclaredConstructors0(Native Method)
	at java.lang.Class.privateGetDeclaredConstructors(Class.java:1610)
	at java.lang.Class.getConstructor0(Class.java:1922)
	at java.lang.Class.getConstructor(Class.java:1019)
	at 
org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryImpl.java:429)
	... 13 more


-dennis