1 Reply Latest reply on Feb 10, 2006 1:12 PM by Gyula Szabo

    HashMap persistence problem

    Gyula Szabo Newbie

      Hi,
      the following code generates a null pointer exception in the TreeCache class when I try to persist the treecache:

      Map map = new HashMap();
      map.put(MAP_KEY_PM, pm);
      map.put(MAP_KEY_DESTINATION, stsDestination);
      treeCache.put(
       getPathToPMIDNode(pm.getId()), // path to node
       map); // map
      
      ;
      while if I try the following:
      treeCache.put(
       getPathToPMIDNode(pm.getId()), // path to node
       MAP_KEY_PM,
       pm);
      treeCache.put(
       getPathToPMIDNode(pm.getId()), // path to node
       MAP_KEY_DESTINATION,
       stsDestination);
      

      it works perfectly well.
      Here is the stack trace:
      RuntimeMBeanException: null Cause: RuntimeMBeanException: null Cause: org.jboss.util.NestedRuntimeException: - nested throwable: (java.lang.NullPointe
      rException)
      [...]
      Caused by: RuntimeMBeanException: null Cause: org.jboss.util.NestedRuntimeException: - nested throwable: (java.lang.NullPointerException)
       at org.jboss.mx.interceptor.ReflectedDispatcher.handleInvocationExceptions(ReflectedDispatcher.java:162)
       at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:149)
       at org.jboss.mx.server.Invocation.dispatch(Invocation.java:80)
       at org.jboss.mx.server.Invocation.invoke(Invocation.java:72)
       at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:249)
       at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:644)
       at javax.management.MBeanServerInvocationHandler$InvokeAction.perform(MBeanServerInvocationHandler.java:322)
       at javax.management.MBeanServerInvocationHandler.invoke(MBeanServerInvocationHandler.java:140)
       at $Proxy164.put(Unknown Source)
       at apackage.TreeCacheHandler.addMessage(TreeCacheHandler.java:267)
       at apackage.MasterMessageQueue.scheduleMessage(MasterMessageQueue.java:284)
       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:324)
       at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)
       ... 46 more
      Caused by: org.jboss.util.NestedRuntimeException: - nested throwable: (java.lang.NullPointerException)
       at org.jboss.cache.TreeCache.invokeMethod(TreeCache.java:3107)
       at org.jboss.cache.TreeCache.put(TreeCache.java:1670)
       at org.jboss.cache.TreeCache.put(TreeCache.java:1654)
       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:324)
       at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:141)
       ... 60 more
      Caused by: java.lang.NullPointerException
       at org.jboss.cache.TreeCache.invokeMethod(TreeCache.java:3102)
       ... 67 more

      Here is my configuration of the environment
      <attribute name="CacheLoaderClass">org.jboss.cache.loader.JDBCCacheLoader</attribute>
       <attribute name="CacheLoaderShared">true</attribute>
       <attribute name="CacheLoaderPreload">/</attribute>
       <attribute name="CacheLoaderFetchTransientState">true</attribute>
       <attribute name="CacheLoaderFetchPersistentState">false</attribute>
       <attribute name="CacheLoaderConfig">
       cache.jdbc.table.name=mmq_schedule
       cache.jdbc.table.create=true
       cache.jdbc.table.drop=false
       cache.jdbc.fqn.column=fqn
       cache.jdbc.fqn.type=varchar(255)
       cache.jdbc.node.column=node
       cache.jdbc.node.type=longvarbinary
       cache.jdbc.parent.column=parent
       cache.jdbc.datasource=java:/DefaultDS
       </attribute>
      

      where the DefaultDS is mapped to a HSQLDB database.
      The JBoss version is 4.0.2 and the treecache version is:
      Manifest-Version: 1.0
      Specification-Title: JBoss
      Created-By: 1.4.2_05-b04 (Sun Microsystems Inc.)
      Specification-Version: 4.0.2
      Implementation-Vendor-Id: http://www.jboss.org/
      Implementation-URL: http://www.jboss.org/
      Ant-Version: Apache Ant 1.6.2
      Main-Class: org.jboss.cache.Version
      Implementation-Title: JBossCache
      Specification-Vendor: JBoss (http://www.jboss.org/)
      Implementation-Version: 4.0.2 (build: CVSTag=JBoss_4_0_2 date=20050502
       2023)
      JBossCache-Version: 1.2
      Implementation-Vendor: JBoss Inc.
      

      Can anybody help me to solve this problem?
      Thank you.