"manik.surtani(a)jboss.com" wrote : You will need to switch JBoss Cache to DEBUG level and JGroups to INFO level logging and look at the startup log to ascertain why the nodes don't discover each other. | | Which OS is this on? The OS is Windows XP (development platform). Here is the log when it doesn't work : 2006-10-23 18:32:05,937 [main] INFO org.jboss.cache.PropertyConfigurator - Found existing property editor for org.w3c.dom.Element: org.jboss.util.propertyeditor.ElementEditor@c6e1ec 2006-10-23 18:32:06,515 [main] INFO org.jboss.cache.PropertyConfigurator - attribute size: 11 2006-10-23 18:32:06,562 [main] DEBUG org.jboss.cache.PropertyConfigurator - setting attribute IsolationLevel to NONE 2006-10-23 18:32:06,578 [main] DEBUG org.jboss.cache.PropertyConfigurator - setting attribute CacheMode to REPL_ASYNC 2006-10-23 18:32:06,578 [main] DEBUG org.jboss.cache.PropertyConfigurator - Invoking setter method: public void org.jboss.cache.TreeCache.setUseReplQueue(boolean) with parameter "false" of type class java.lang.Boolean 2006-10-23 18:32:06,578 [main] DEBUG org.jboss.cache.PropertyConfigurator - Invoking setter method: public void org.jboss.cache.TreeCache.setReplQueueInterval(long) with parameter "0" of type class java.lang.Long 2006-10-23 18:32:06,578 [main] DEBUG org.jboss.cache.PropertyConfigurator - Invoking setter method: public void org.jboss.cache.TreeCache.setReplQueueMaxElements(int) with parameter "0" of type class java.lang.Integer 2006-10-23 18:32:06,578 [main] DEBUG org.jboss.cache.PropertyConfigurator - setting attribute ClusterName to lbsCache 2006-10-23 18:32:06,578 [main] DEBUG org.jboss.cache.PropertyConfigurator - Invoking setter method: public void org.jboss.cache.TreeCache.setClusterConfig(org.w3c.dom.Element) with parameter "[config: null]" of type class org.apache.xerces.dom.DeferredElementImpl 2006-10-23 18:32:06,578 [main] DEBUG org.jboss.cache.TreeCache - setting cluster properties from xml to: TCP(bind_addr=cerise;loopback=true;start_port=7800):TCPPING(down_thread=true;initial_hosts=cerise[7800],poire[7800];num_initial_members=3;port_range=1;timeout=3500;up_thread=true):MERGE2(max_interval=10000;min_interval=5000):FD(down_thread=true;max_tries=5;shun=true;timeout=2500;up_thread=true):VERIFY_SUSPECT(down_thread=false;timeout=1500;up_thread=false):pbcast.NAKACK(down_thread=true;gc_lag=100;retransmit_timeout=3000;up_thread=true):pbcast.STABLE(desired_avg_gossip=20000;down_thread=false;up_thread=false):pbcast.GMS(down_thread=true;join_retry_timeout=2000;join_timeout=5000;print_local_addr=true;shun=false;up_thread=true):pbcast.STATE_TRANSFER(down_thread=true;up_thread=true) 2006-10-23 18:32:06,578 [main] DEBUG org.jboss.cache.PropertyConfigurator - Invoking setter method: public void org.jboss.cache.TreeCache.setFetchInMemoryState(boolean) with parameter "true" of type class java.lang.Boolean 2006-10-23 18:32:06,578 [main] DEBUG org.jboss.cache.PropertyConfigurator - Invoking setter method: public void org.jboss.cache.TreeCache.setInitialStateRetrievalTimeout(long) with parameter "5000" of type class java.lang.Long 2006-10-23 18:32:06,578 [main] DEBUG org.jboss.cache.PropertyConfigurator - Invoking setter method: public void org.jboss.cache.TreeCache.setSyncReplTimeout(long) with parameter "10000" of type class java.lang.Long 2006-10-23 18:32:06,578 [main] DEBUG org.jboss.cache.PropertyConfigurator - Invoking setter method: public void org.jboss.cache.TreeCache.setLockAcquisitionTimeout(long) with parameter "15000" of type class java.lang.Long 2006-10-23 18:32:06,578 [main] WARN org.jboss.cache.TreeCache - No transaction manager lookup class has been defined. Transactions cannot be used 2006-10-23 18:32:06,593 [main] DEBUG org.jboss.cache.TreeCache - Not using an EvictionPolicy 2006-10-23 18:32:06,671 [main] INFO org.jboss.cache.factories.InterceptorChainFactory - interceptor chain is: class org.jboss.cache.interceptors.CallInterceptor class org.jboss.cache.interceptors.PessimisticLockInterceptor class org.jboss.cache.interceptors.UnlockInterceptor class org.jboss.cache.interceptors.ReplicationInterceptor class org.jboss.cache.interceptors.TxInterceptor class org.jboss.cache.interceptors.CacheMgmtInterceptor 2006-10-23 18:32:06,703 [main] DEBUG org.jboss.cache.TreeCache - cache mode is REPL_ASYNC Here is the log when it works : 2006-10-23 18:34:21,234 [main] INFO org.jboss.cache.PropertyConfigurator - Found existing property editor for org.w3c.dom.Element: org.jboss.util.propertyeditor.ElementEditor@158f1fa 2006-10-23 18:34:21,812 [main] INFO org.jboss.cache.PropertyConfigurator - configure(): attribute size: 11 2006-10-23 18:34:21,812 [main] DEBUG org.jboss.cache.PropertyConfigurator - setting attribute IsolationLevel to NONE 2006-10-23 18:34:21,812 [main] DEBUG org.jboss.cache.PropertyConfigurator - setting attribute CacheMode to REPL_ASYNC 2006-10-23 18:34:21,812 [main] DEBUG org.jboss.cache.PropertyConfigurator - Invoking setter method: public void org.jboss.cache.TreeCache.setUseReplQueue(boolean) with parameter "false" of type class java.lang.Boolean 2006-10-23 18:34:21,812 [main] DEBUG org.jboss.cache.PropertyConfigurator - Invoking setter method: public void org.jboss.cache.TreeCache.setReplQueueInterval(long) with parameter "0" of type class java.lang.Long 2006-10-23 18:34:21,812 [main] DEBUG org.jboss.cache.PropertyConfigurator - Invoking setter method: public void org.jboss.cache.TreeCache.setReplQueueMaxElements(int) with parameter "0" of type class java.lang.Integer 2006-10-23 18:34:21,812 [main] DEBUG org.jboss.cache.PropertyConfigurator - setting attribute ClusterName to lbsCache 2006-10-23 18:34:21,828 [main] DEBUG org.jboss.cache.PropertyConfigurator - Invoking setter method: public void org.jboss.cache.TreeCache.setClusterConfig(org.w3c.dom.Element) with parameter "[config: null]" of type class org.apache.xerces.dom.DeferredElementImpl 2006-10-23 18:34:21,828 [main] INFO org.jboss.cache.TreeCache - setting cluster properties from xml to: TCP(bind_addr=cerise;loopback=true;start_port=7800):TCPPING(down_thread=true;initial_hosts=cerise[7800],poire[7800];num_initial_members=3;port_range=1;timeout=3500;up_thread=true):MERGE2(max_interval=10000;min_interval=5000):FD(down_thread=true;max_tries=5;shun=true;timeout=2500;up_thread=true):VERIFY_SUSPECT(down_thread=false;timeout=1500;up_thread=false):pbcast.NAKACK(down_thread=true;gc_lag=100;retransmit_timeout=3000;up_thread=true):pbcast.STABLE(desired_avg_gossip=20000;down_thread=false;up_thread=false):pbcast.GMS(down_thread=true;join_retry_timeout=2000;join_timeout=5000;print_local_addr=true;shun=false;up_thread=true):pbcast.STATE_TRANSFER(down_thread=true;up_thread=true) 2006-10-23 18:34:21,828 [main] DEBUG org.jboss.cache.PropertyConfigurator - Invoking setter method: public void org.jboss.cache.TreeCache.setInitialStateRetrievalTimeout(long) with parameter "5000" of type class java.lang.Long 2006-10-23 18:34:21,828 [main] DEBUG org.jboss.cache.PropertyConfigurator - Invoking setter method: public void org.jboss.cache.TreeCache.setSyncReplTimeout(long) with parameter "10000" of type class java.lang.Long 2006-10-23 18:34:21,828 [main] DEBUG org.jboss.cache.PropertyConfigurator - Invoking setter method: public void org.jboss.cache.TreeCache.setLockAcquisitionTimeout(long) with parameter "15000" of type class java.lang.Long 2006-10-23 18:34:21,828 [main] WARN org.jboss.cache.TreeCache - No transaction manager lookup class has been defined. Transactions cannot be used 2006-10-23 18:34:21,843 [main] INFO org.jboss.cache.TreeCache - interceptor chain is: class org.jboss.cache.interceptors.CallInterceptor class org.jboss.cache.interceptors.LockInterceptor class org.jboss.cache.interceptors.UnlockInterceptor class org.jboss.cache.interceptors.ReplicationInterceptor 2006-10-23 18:34:21,843 [main] INFO org.jboss.cache.TreeCache - cache mode is REPL_ASYNC 2006-10-23 18:34:22,281 [main] DEBUG org.jboss.cache.TreeCache - cache properties: TCP(bind_addr=cerise;loopback=true;start_port=7800):TCPPING(down_thread=true;initial_hosts=cerise[7800],poire[7800];num_initial_members=3;port_range=1;timeout=3500;up_thread=true):MERGE2(max_interval=10000;min_interval=5000):FD(down_thread=true;max_tries=5;shun=true;timeout=2500;up_thread=true):VERIFY_SUSPECT(down_thread=false;timeout=1500;up_thread=false):pbcast.NAKACK(down_thread=true;gc_lag=100;retransmit_timeout=3000;up_thread=true):pbcast.STABLE(desired_avg_gossip=20000;down_thread=false;up_thread=false):pbcast.GMS(down_thread=true;join_retry_timeout=2000;join_timeout=5000;print_local_addr=true;shun=false;up_thread=true):pbcast.STATE_TRANSFER(down_thread=true;up_thread=true) 2006-10-23 18:34:22,375 [DownHandler (TCP)] INFO org.jgroups.blocks.ConnectionTable - server socket created on 192.168.1.61:7800 2006-10-23 18:34:25,937 [DownHandler (STATE_TRANSFER)] INFO org.jboss.cache.TreeCache - new cache is null (maybe first member in cluster) 2006-10-23 18:34:25,937 [main] INFO org.jboss.cache.TreeCache - state could not be retrieved (must be first member in group) 2006-10-23 18:34:25,953 [UpHandler (STATE_TRANSFER)] INFO org.jboss.cache.TreeCache - viewAccepted(): new members: [192.168.1.61:7800] It seems that the difference is in the interceptor chain. 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