java.io.NotSerializableException: WebappClassLoader
Hello,
I would like to use TreeCache inside JBossAS and access it from Tomcat running outside JBossAS.
- JBoss 4.0.5 GA
- Tomcat 5.5.20
- WinXP
- j2sdk1.5.0_07
I have a cache-service.xml config in the deploy directory of JBoss, here is the config:
<?xml version="1.0" encoding="UTF-8"?> <!-- ===================================================================== --> <!-- --> <!-- Sample TreeCache Service Configuration --> <!-- --> <!-- ===================================================================== --> <server> <classpath codebase="./lib" archives="jboss-cache.jar, jgroups.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.JBossTransactionManagerLookup</attribute> <!-- Node locking level : SERIALIZABLE REPEATABLE_READ (default) READ_COMMITTED READ_UNCOMMITTED NONE --> <attribute name="IsolationLevel">REPEATABLE_READ</attribute> <!-- Valid modes are LOCAL REPL_ASYNC REPL_SYNC INVALIDATION_ASYNC INVALIDATION_SYNC --> <attribute name="CacheMode">LOCAL</attribute> <!--<attribute name="UseInterceptorMbeans">true</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> --> <attribute name="ClusterConfig"> <config> <!-- UDP: if you have a multihomed machine, set the bind_addr attribute to the appropriate NIC IP address --> <!-- 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="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 shun="true" up_thread="true" down_thread="true"/> <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" window_size="100" min_threshold="10" 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="false" down_thread="false"/> </config> </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">20000</attribute> <!-- Number of milliseconds to wait until all responses for a synchronous call have been received. --> <attribute name="SyncReplTimeout">20000</attribute> <!-- Max number of milliseconds to wait for a lock acquisition --> <attribute name="LockAcquisitionTimeout">15000</attribute> <attribute name="EvictionPolicyClass">org.jboss.cache.eviction.LRUPolicy</attribute> <!-- Specific eviction policy configurations. This is LRU --> <attribute name="EvictionPolicyConfig"> <config> <attribute name="wakeUpIntervalSeconds">300</attribute> <!-- Cache wide default --> <region name="/command_image/"> <attribute name="maxNodes">100</attribute> <attribute name="timeToLiveSeconds">8</attribute> <attribute name="maxAgeSeconds">10</attribute> </region> <region name="/command_photo/"> <attribute name="maxNodes">100</attribute> <attribute name="timeToLiveSeconds">8</attribute> <attribute name="maxAgeSeconds">10</attribute> </region> <region name="/command_mixte/"> <attribute name="maxNodes">100</attribute> <attribute name="timeToLiveSeconds">8</attribute> <attribute name="maxAgeSeconds">10</attribute> </region> </config> </attribute> <!-- Indicate whether to use region based marshalling or not. Set this to true if you are running under a scoped class loader, e.g., inside an application server. Default is "false". --> <attribute name="UseRegionBasedMarshalling">true</attribute> <attribute name="CacheLoaderConfiguration"> <config> <passivation>true</passivation> <preload></preload> <cacheloader> <class>org.jboss.cache.loader.JDBCExtendedCacheLoader</class> <!-- same as the old CacheLoaderConfig attribute --> <properties> cache.jdbc.table.name=jbosscache cache.jdbc.table.create=true cache.jdbc.table.drop=false cache.jdbc.table.primarykey=jbosscache_pk cache.jdbc.fqn.column=fqn cache.jdbc.fqn.type=varchar(255) cache.jdbc.node.column=node cache.jdbc.node.type=VARBINARY(MAX) cache.jdbc.parent.column=parent cache.jdbc.driver=net.sourceforge.jtds.jdbc.Driver cache.jdbc.url=jdbc:jtds:sqlserver://192.168.1.74:1433/MappingCache cache.jdbc.user cache.jdbc.password </properties> <!-- whether the cache loader writes are asynchronous --> <async>false</async> <!-- only one cache loader in the chain may set fetchPersistentState to true. An exception is thrown if more than one cache loader sets this to true. --> <fetchPersistentState>true</fetchPersistentState> <!-- determines whether this cache loader ignores writes - defaults to false. --> <ignoreModifications>false</ignoreModifications> <!-- if set to true, purges the contents of this cache loader when the cache starts up. Defaults to false. --> <purgeOnStartup>false</purgeOnStartup> </cacheloader> </config> </attribute> </mbean> <mbean code="org.jboss.invocation.jrmp.server.JRMPProxyFactory" name="mydomain:service=proxyFactory,type=jrmp,target=factory"> <attribute name="InvokerName">jboss:service=invoker,type=jrmp</attribute> <attribute name="TargetName">jboss.cache:service=TreeCache</attribute> <attribute name="JndiName">MyCache</attribute> <attribute name="InvokeTargetMethod">true</attribute> <attribute name="ExportedInterface">org.jboss.cache.TreeCacheMBean</attribute> <attribute name="ClientInterceptors"> <interceptors> <interceptor>org.jboss.proxy.ClientMethodInterceptor</interceptor> <interceptor>org.jboss.proxy.SecurityInterceptor</interceptor> <interceptor>org.jboss.invocation.InvokerInterceptor</interceptor> </interceptors> </attribute> <depends>jboss:service=invoker,type=jrmp</depends> <depends>jboss.cache:service=TreeCache</depends> </mbean> </server>
In Tomcat, i can bind to the TreeCache with jndi in my ServletContextListener. But when Tomcat execute this line
treecache.registerClassLoader("/command_image/", Thread.currentThread().getContextClassLoader());
an exception is thrown:
ERROR 2007-04-04 17:49:54,078 com.marketip.cache.util.TreeCacheSingleton - java.lang.reflect.UndeclaredThrowableException at $Proxy0.registerClassLoader(Unknown Source) at com.marketip.cache.util.TreeCacheSingleton.init(TreeCacheSingleton.java:45) at com.marketip.cache.listener.CacheControlListener.contextInitialized(CacheControlListener.java:39) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3729) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4187) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:759) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:739) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:524) at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:904) at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:867) at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:474) at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1122) at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:310) at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1021) at org.apache.catalina.core.StandardHost.start(StandardHost.java:718) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1013) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:442) at org.apache.catalina.core.StandardService.start(StandardService.java:450) at org.apache.catalina.core.StandardServer.start(StandardServer.java:709) at org.apache.catalina.startup.Catalina.start(Catalina.java:551) 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:585) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:294) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:432) Caused by: java.rmi.MarshalException: error marshalling arguments; nested exception is: java.io.NotSerializableException: org.apache.catalina.loader.WebappClassLoader at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:122) at org.jboss.invocation.jrmp.server.JRMPInvoker_Stub.invoke(Unknown Source) at org.jboss.invocation.jrmp.interfaces.JRMPInvokerProxy.invoke(JRMPInvokerProxy.java:133) at org.jboss.invocation.InvokerInterceptor.invokeInvoker(InvokerInterceptor.java:365) at org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:197) at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:70) at org.jboss.proxy.ClientMethodInterceptor.invoke(ClientMethodInterceptor.java:74) at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:100) ... 27 more Caused by: java.io.NotSerializableException: org.apache.catalina.loader.WebappClassLoader at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1081) at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1251) at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1075) at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:302) at org.jboss.invocation.MarshalledValue.<init>(MarshalledValue.java:70) at org.jboss.invocation.MarshalledInvocation.createMarshalledValue(MarshalledInvocation.java:632) at org.jboss.invocation.MarshalledInvocation.writeExternal(MarshalledInvocation.java:570) at java.io.ObjectOutputStream.writeExternalData(ObjectOutputStream.java:1307) at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1288) at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1079) at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:302) at sun.rmi.server.UnicastRef.marshalValue(UnicastRef.java:258) at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:117) ... 34 more
Here is the complete code executed in order to bind to TreeCache:
Properties props = new Properties();
props.setProperty("java.naming.factory.initial", "org.jnp.interfaces.NamingContextFactory");
props.setProperty("java.naming.provider.url", "jnp://localhost:1099");
props.setProperty("java.naming.factory.url.pkgs", "org.jboss.naming:org.jnp.interfaces");
InitialContext ctx=new InitialContext(props);
treecache = (TreeCacheMBean)ctx.lookup("MyCache");
treecache.registerClassLoader("/command_image/", Thread.currentThread().getContextClassLoader());
isInited = true;
Could someone help me?
What is wrong in my config or in my code?
Thank you in advance.
PHS
