[jboss-user] [JBossCache] - Strange ClassCastException in OptimisticCreateIfNotExistsInt

[spennec]

Hi all,

I'm experiencing a very strange problem, and would like some insight on what's really happening.

I am using TreeCache 2.0.0, under Weblogic 9.2.2. The app is deployed in a cluster with two members. The cache is configured with REPLY_ASYNC mode, and Optimistic Node Locking Scheme.

At some point, I would like to refresh completely the data that is present in a given node. Inside a transaction, I remove two data nodes and put new values with updated data. The data is pretty big. It is a SortedSet that holds around 140'000 value objects, each containing a few Strings.

When the transaction commit, an error is logged by CacheImpl, with the following stacktrace:


  | java.lang.ClassCastException: com.myCompany.MyCachedValueObject
  | 	at org.jboss.cache.interceptors.OptimisticCreateIfNotExistsInterceptor.invoke(OptimisticCreateIfNotExistsInterceptor.java:57)
  | 	at org.jboss.cache.interceptors.Interceptor.invoke(Interceptor.java:76)
  | 	at org.jboss.cache.interceptors.OptimisticValidatorInterceptor.invoke(OptimisticValidatorInterceptor.java:67)
  | 	at org.jboss.cache.interceptors.Interceptor.invoke(Interceptor.java:76)
  | 	at org.jboss.cache.interceptors.OptimisticLockingInterceptor.invoke(OptimisticLockingInterceptor.java:99)
  | 	at org.jboss.cache.interceptors.Interceptor.invoke(Interceptor.java:76)
  | 	at org.jboss.cache.interceptors.OptimisticReplicationInterceptor.invoke(OptimisticReplicationInterceptor.java:137)
  | 	at org.jboss.cache.interceptors.Interceptor.invoke(Interceptor.java:76)
  | 	at org.jboss.cache.interceptors.NotificationInterceptor.invoke(NotificationInterceptor.java:32)
  | 	at org.jboss.cache.interceptors.Interceptor.invoke(Interceptor.java:76)
  | 	at org.jboss.cache.interceptors.TxInterceptor.replayModifications(TxInterceptor.java:511)
  | 	at org.jboss.cache.interceptors.TxInterceptor.handleOptimisticPrepare(TxInterceptor.java:373)
  | 	at org.jboss.cache.interceptors.TxInterceptor.handleRemotePrepare(TxInterceptor.java:250)
  | 	at org.jboss.cache.interceptors.TxInterceptor.invoke(TxInterceptor.java:100)
  | 	at org.jboss.cache.interceptors.Interceptor.invoke(Interceptor.java:76)
  | 	at org.jboss.cache.interceptors.CacheMgmtInterceptor.invoke(CacheMgmtInterceptor.java:123)
  | 	at org.jboss.cache.interceptors.Interceptor.invoke(Interceptor.java:76)
  | 	at org.jboss.cache.interceptors.InvocationContextInterceptor.invoke(InvocationContextInterceptor.java:62)
  | 	at org.jboss.cache.CacheImpl.invokeMethod(CacheImpl.java:3939)
  | 	at org.jboss.cache.CacheImpl._replicate(CacheImpl.java:2853)
  | 	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.jgroups.blocks.MethodCall.invoke(MethodCall.java:330)
  | 	at org.jboss.cache.interceptors.CallInterceptor.invoke(CallInterceptor.java:49)
  | 	at org.jboss.cache.interceptors.Interceptor.invoke(Interceptor.java:76)
  | 	at org.jboss.cache.interceptors.OptimisticNodeInterceptor.invoke(OptimisticNodeInterceptor.java:161)
  | 	at org.jboss.cache.interceptors.Interceptor.invoke(Interceptor.java:76)
  | 

In the invoke method of OptimisticCreateIfNotExistsInterceptor, the code tries to cast an object into a FQN class.

The message accompagnying the log statement is as follows:

Message = replication failure with method_call MethodName: optimisticPrepare; MethodIdInteger: 18; Args: 
(GlobalTransaction:<10.23.65.28:4691>:4, [MethodName: _remove; MethodIdInteger: 40; Args: 
(GlobalTransaction:<10.23.65.28:4691>:4, /Node1/SubNode/SubSubNode1, true, Ver=2), MethodName: _remove; 
MethodIdInteger: 40; Args: (GlobalTransaction:<10.23.65.28:4691>:4, /Node1/SubNode/SubSubNode2, true, Ver=2), 
MethodName: _put; MethodIdInteger: 39; Args: (GlobalTransaction:<10.23.65.28:4691>:4, 
/Node1/SubNode/SubSubNode1, Node_Key, {Whole_ToString()_Value_Of_SortedSet}

Could anybody help me out with this issue?

Thanks!

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