2:25 p.m.
I'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.
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