[jboss-user] [JBossCache] - Re: NullPointerException when call the get(..) method, W

[liuhang781102]

 This is not the first things happened immediatelly after the cache start.

 I modified my code ,now I get the fllowing exception stack. It is more clearly.
 NullpointerException throws in the wasRemovedInTx method of CacheLoaderInterceptor class.
 It seams that the 'entry' is null.
 I also paste the function code.
 Still need your help!
 
Exception Stack:
-----------------------------------------------------------
	at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
	at com.primeton.eos.fbframe.fbrole.security.filter.WebSecurityFilter.doFilter(WebSecurityFilter.java:101)
	at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
	at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:6724)
	at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
	at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
	at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3764)
	at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2644)
	at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:219)
	at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:178)
Caused by: java.lang.NullPointerException
	at org.jboss.cache.interceptors.CacheLoaderInterceptor.wasRemovedInTx(CacheLoaderInterceptor.java:307)
	at org.jboss.cache.interceptors.CacheLoaderInterceptor.invoke(CacheLoaderInterceptor.java:164)
	at org.jboss.cache.interceptors.Interceptor.invoke(Interceptor.java:68)
	at org.jboss.cache.interceptors.UnlockInterceptor.invoke(UnlockInterceptor.java:32)
	at org.jboss.cache.interceptors.Interceptor.invoke(Interceptor.java:68)
	at org.jboss.cache.interceptors.InvalidationInterceptor.invoke(InvalidationInterceptor.java:60)
	at org.jboss.cache.interceptors.Interceptor.invoke(Interceptor.java:68)
	at org.jboss.cache.interceptors.TxInterceptor.handleNonTxMethod(TxInterceptor.java:345)
	at org.jboss.cache.interceptors.TxInterceptor.invoke(TxInterceptor.java:156)
	at org.jboss.cache.interceptors.Interceptor.invoke(Interceptor.java:68)
	at org.jboss.cache.interceptors.CacheMgmtInterceptor.invoke(CacheMgmtInterceptor.java:138)
	at org.jboss.cache.TreeCache.invokeMethod(TreeCache.java:5517)
	... 44 more


The Excepton Code in jbosscache
-------------------------------------------------------------
   private boolean wasRemovedInTx(Fqn fqn)
   {
      GlobalTransaction t = getInvocationContext().getGlobalTransaction();
      if (t == null)
         return false;
      TransactionEntry entry = txTable.get(t);
      Iterator i = entry.getCacheLoaderModifications().iterator(); ( ------------------ row 307----)
      while (i.hasNext())
      {
         JBCMethodCall m = (JBCMethodCall)i.next();
         if (m.getMethodId() == MethodDeclarations.removeNodeMethodLocal_id
               && fqn.isChildOrEquals((Fqn)m.getArgs()[1]))
            return true;
      }
      return false;
   }


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