Hi
I am able to use the TreeCache in my JBoss cluster - and it works fine until I
redeploy any of my application jars.
At this point I get a ClassCastException .
Why is the TreeCache stopped and started when any jar is redeployed - even if it has
nothing to do with TreeCache??
If I subsequently try to use the cache from a SLSB I get the following
java.lang.NoSuchMethodException:
org.jboss.cache.TreeCache._put(org.jboss.cache.GlobalTransaction, org.jboss.cache.Fqn,
java.lang.Object, java.lang.Object, boolean)
I must restart all my cluster nodes.
I am using JBoss 3.2.3
I include the following
1. The ClassCastException stacktrace
2. My TreeCache XML descriptor (replSync-service.xml). Notice I have not specified a
cluster config.
3. My SLSB code snippet
Anyone else experienced this?
Many thanks in advance
mark
| 14:00:25,316 INFO [TreeCache] setState(): setting the new state
| 14:00:25,332 ERROR [TreeCache] setState(): could not set cache:
| java.lang.ClassCastException
| at
org.jboss.cache.TreeCache$MessageListenerAdaptor.setState(TreeCache.java:2469)
| at
org.jgroups.blocks.MessageDispatcher$ProtocolAdapter.passUp(MessageDispatcher.java:470)
| at org.jgroups.blocks.RequestCorrelator.receive(RequestCorrelator.java:292)
| at
org.jgroups.blocks.MessageDispatcher$ProtocolAdapter.up(MessageDispatcher.java:515)
| at org.jgroups.JChannel.up(JChannel.java:860)
| at org.jgroups.stack.ProtocolStack.up(ProtocolStack.java:314)
| at org.jgroups.stack.ProtocolStack.receiveUpEvent(ProtocolStack.java:330)
| at org.jgroups.stack.Protocol.passUp(Protocol.java:470)
| at
org.jgroups.protocols.pbcast.STATE_TRANSFER.handleStateRsp(STATE_TRANSFER.java:299)
| at org.jgroups.protocols.pbcast.STATE_TRANSFER.up(STATE_TRANSFER.java:119)
| at org.jgroups.stack.UpHandler.run(Protocol.java:55)
| 14:00:25,332 INFO [TreeCache] state was retrieved successfully (in 31 milliseconds
|
| <?xml version="1.0" encoding="UTF-8"?>
|
| <!-- ===================================================================== -->
| <!-- -->
| <!-- Sample TreeCache Service Configuration -->
| <!-- -->
| <!-- ===================================================================== -->
|
| <server>
|
| <!--<classpath codebase="file:/C:/jboss/jboss-cache/lib"
archives="jboss-cache.jar, jgroups.jar"/>-->
| <classpath codebase="file:/C:/jboss/jboss-cache/lib"
archives="jboss-cache.jar"/>
|
|
| <!-- ==================================================================== -->
| <!-- Defines TreeCache configuration -->
| <!-- ==================================================================== -->
|
| <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.DummyTransactionManagerLookup</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">TreeCache-Cluster</attribute>
|
| <!-- JGroups protocol stack properties. Can also be a URL,
| e.g. file:/home/bela/default.xml
| <attribute name="ClusterProperties"></attribute>
| -->
|
|
| <!--
| Max number of entries in the cache. If this is exceeded, the
| eviction policy will kick some entries out in order to make
| more room
| -->
| <attribute name="MaxCapacity">20000</attribute>
|
| <!--
| Whether or not to fetch state on joining a cluster
| -->
| <attribute name="FetchStateOnStartup">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">5000</attribute>
|
| <!--
| Number of milliseconds to wait until all responses for a
| synchronous call have been received.
| -->
| <attribute name="SyncReplTimeout">10000</attribute>
|
| <!-- Max number of milliseconds to wait for a lock acquisition -->
| <attribute name="LockAcquisitionTimeout">15000</attribute>
|
| <!-- Max number of milliseconds we hold a lock (not currently
| implemented) -->
| <attribute name="LockLeaseTimeout">60000</attribute>
|
| <!-- Name of the eviction policy class. Not supported now. -->
| <attribute name="EvictionPolicyClass"></attribute>
|
| </mbean>
|
|
| <!-- Uncomment to get a graphical view of the TreeCache MBean above -->
| <!-- <mbean code="org.jboss.cache.TreeCacheView"
name="jboss.cache:service=TreeCacheView">-->
| <!-- <depends>jboss.cache:service=TreeCache</depends>-->
| <!-- <attribute
name="CacheService">jboss.cache:service=TreeCache</attribute>-->
| <!-- </mbean>-->
| </server>
|
| // find the first instance of an mbean server in the system (there will only be
one)...
| List list = MBeanServerFactory.findMBeanServer(null);
| MBeanServer server = (MBeanServer)list.iterator().next();
| ObjectName cacheService = new ObjectName("jboss.cache:service=TreeCache");;
| Object[] args;
| String[] sig;
|
| if (doPut) {
| //put into cache
| args = new Object[] {FQN, key, value};
| sig = new String[] {String.class.getName(),
| Object.class.getName(),
| Object.class.getName()};
|
| server.invoke(cacheService, "put", args, sig);
|
| System.out.println("...put into cache");
| }
|
| //get from cache
| args = new Object[]{FQN, key};
| sig = new String[]{String.class.getName(), Object.class.getName()};
| value = server.invoke(cacheService, "get", args, sig);
|
| System.out.println("from cache value = " + value.toString());
|
|
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