TreeCache Cluster problem (JBoss 4.2.3 and JBossCache 1.4.1
servosimpson Jul 30, 2009 3:25 PMI'm trying to get a simple TreeCache cluster working. The first server comes up fine and data is inserted into the cache. Here is the code for the cache init called from a ServletContextListener:
public void initCache() throws Exception { try { server = MBeanServerLocator.locateJBoss(); cache = (TreeCacheMBean)MBeanProxyExt.create(TreeCacheMBean.class, new ObjectName("jboss.cache:service=TreeCache"),server); cache.registerClassLoader("/TestCache", Thread.currentThread().getContextClassLoader()); cache.activateRegion("/TestCache"); if (cache == null) { throw new Exception("..."); } } catch (Exception e) { throw new Exception("...",e); } }
The config is:
<?xml version="1.0" encoding="UTF-8"?> <server> <mbean code="org.jboss.cache.TreeCache" name="jboss.cache:service=TreeCache"> <depends>jboss:service=Naming</depends> <depends>jboss:service=TransactionManager</depends> <!-- Configure the TransactionManager --> <attribute name="TransactionManagerLookupClass"> org.jboss.cache.JBossTransactionManagerLookup </attribute> <!-- Isolation level : SERIALIZABLE REPEATABLE_READ (default) READ_COMMITTED READ_UNCOMMITTED NONE --> <attribute name="IsolationLevel">REPEATABLE_READ</attribute> <!-- Valid modes are LOCAL, REPL_ASYNC and REPL_SYNC --> <attribute name="CacheMode">REPL_SYNC</attribute> <!-- Just used for async repl: use a replication queue --> <attribute name="UseReplQueue">false</attribute> <!-- Replication interval for replication queue (in ms) --> <attribute name="ReplQueueInterval">0</attribute> <!-- Max number of elements which trigger replication --> <attribute name="ReplQueueMaxElements">0</attribute> <!-- Name of cluster. Needs to be the same for all clusters, in order to find each other --> <attribute name="ClusterName">${jboss.partition.name:DefaultPartition}-TreeCache</attribute> <!-- JGroups protocol stack properties. Can also be a URL, e.g. file:/home/bela/default.xml <attribute name="ClusterProperties"></attribute> --> <attribute name="ClusterConfig"> <config> <!-- UDP: if you have a multihomed machine, set the bind_addr attribute to the appropriate NIC IP address, e.g bind_addr="192.168.0.2" --> <!-- UDP: On Windows machines, because of the media sense feature being broken with multicast (even after disabling media sense) set the loopback attribute to true --> <UDP mcast_addr="${jboss.partition.udpGroup:228.1.2.3}" mcast_port="48866" ip_ttl="64" ip_mcast="true" mcast_send_buf_size="150000" mcast_recv_buf_size="80000" ucast_send_buf_size="150000" ucast_recv_buf_size="80000" loopback="false" /> <PING timeout="2000" num_initial_members="3" up_thread="false" down_thread="false" /> <MERGE2 min_interval="10000" max_interval="20000" /> <FD_SOCK /> <VERIFY_SUSPECT timeout="1500" up_thread="false" down_thread="false" /> <pbcast.NAKACK gc_lag="50" retransmit_timeout="600,1200,2400,4800" max_xmit_size="8192" up_thread="false" down_thread="false" /> <UNICAST timeout="600,1200,2400" down_thread="false" /> <pbcast.STABLE desired_avg_gossip="20000" up_thread="false" down_thread="false" /> <FRAG frag_size="8192" down_thread="false" up_thread="false" /> <pbcast.GMS join_timeout="5000" join_retry_timeout="2000" shun="true" print_local_addr="true" /> <pbcast.STATE_TRANSFER up_thread="true" down_thread="true" /> </config> </attribute> <!-- Whether or not to fetch state on joining a cluster --> <attribute name="FetchInMemoryState">true</attribute> <attribute name="UseRegionBasedMarshalling">true</attribute> <attribute name="InactiveOnStartup">true</attribute> <!-- The max amount of time (in milliseconds) we wait until the initial state (ie. the contents of the cache) are retrieved from existing members in a clustered environment --> <attribute name="InitialStateRetrievalTimeout">15000</attribute> <!-- Number of milliseconds to wait until all responses for a synchronous call have been received. --> <attribute name="SyncReplTimeout">15000</attribute> <!-- Max number of milliseconds to wait for a lock acquisition --> <attribute name="LockAcquisitionTimeout">10000</attribute> <!-- Name of the eviction policy class. --> <attribute name="EvictionPolicyClass" /> </mbean> </server>
Server A starts fine, and after it is up and running, I launch Server B. It gets to the int code above and throws the following exception:
14:32:47,429 INFO [TreeCache] received the state (size=1024 bytes) 14:32:47,445 ERROR [TreeCache] failed setting transient state java.lang.ClassCastException: org.jboss.cache.loader.NodeData cannot be cast to org.jboss.cache.loader.NodeData at org.jboss.cache.statetransfer.StateTransferIntegrator_140.integrateTransientState(StateTransferIntegrator_140.java:210) at org.jboss.cache.statetransfer.StateTransferIntegrator_140.integrateTransientState(StateTransferIntegrator_140.java:100) at org.jboss.cache.TreeCache._setState(TreeCache.java:2834) at org.jboss.cache.TreeCache._loadState(TreeCache.java:2214) at org.jboss.cache.TreeCache.loadState(TreeCache.java:2098) at org.jboss.cache.TreeCache.activateRegion(TreeCache.java:1986) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155) at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94) at org.jboss.mx.server.Invocation.invoke(Invocation.java:86) at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264) at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659) at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210) at $Proxy63.activateRegion(Unknown Source) at initCache(CacheMgr.java:65)
I've tried searching for this exception but can not find anything. Any ideas?
Thanks in advance.