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4 Replies Latest reply on May 23, 2013 12:20 AM by surendrand001

access protected/default methods from ejb , java.lang.IllegalAccessError: tried to access method

surendrand001 May 16, 2013 9:06 AM

Hi,

I am getting following exceptino when I access a protected / default methods from a EJB

My Project structure is as follows

EARProject

--Foo

Employee.java ( with default constructor)

--Bar

TestEJB.java (Stateless EJB.. accessing Employee constructor)

--WebProject

StartUpServlet (injects @TestEJB and calls a method on EJB)

In my case I am not able to access Employee from TestEJB and getting Exception as follows

18:24:45,392 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[default-host].[/WebProject]] (MSC service thread 1-12) Servlet /WebProject threw load() exception: java.lang.IllegalAccessError: tried to access method com.example.Employee.<init>(Ljava/lang/String;Ljava/lang/String;)V from class com.example.TestEJB

at com.example.TestEJB.getEmployee(TestEJB.java:20) [Bar.jar:]

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [rt.jar:1.6.0_17]

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) [rt.jar:1.6.0_17]

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) [rt.jar:1.6.0_17]

at java.lang.reflect.Method.invoke(Method.java:597) [rt.jar:1.6.0_17]

at org.jboss.as.ee.component.ManagedReferenceMethodInterceptorFactory$ManagedReferenceMethodInterceptor.processInvocation(ManagedReferenceMethodInterceptorFactory.java:72) [jboss-as-ee-7.1.1.Final.jar:7.1.1.Final]

at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final]

at org.jboss.invocation.WeavedInterceptor.processInvocation(WeavedInterceptor.java:53) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final]

at org.jboss.as.ee.component.interceptors.UserInterceptorFactory$1.processInvocation(UserInterceptorFactory.java:36) [jboss-as-ee-7.1.1.Final.jar:7.1.1.Final]

at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final]

at org.jboss.as.jpa.interceptor.SBInvocationInterceptor.processInvocation(SBInvocationInterceptor.java:47)

at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final]

at org.jboss.invocation.InitialInterceptor.processInvocation(InitialInterceptor.java:21) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final]

at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final]

at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final]

at org.jboss.as.ee.component.interceptors.ComponentDispatcherInterceptor.processInvocation(ComponentDispatcherInterceptor.java:53) [jboss-as-ee-7.1.1.Final.jar:7.1.1.Final]

at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final]

at org.jboss.as.ejb3.component.pool.PooledInstanceInterceptor.processInvocation(PooledInstanceInterceptor.java:51) [jboss-as-ejb3-7.1.1.Final.jar:7.1.1.Final]

at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final]

at org.jboss.as.ejb3.tx.CMTTxInterceptor.invokeInOurTx(CMTTxInterceptor.java:228) [jboss-as-ejb3-7.1.1.Final.jar:7.1.1.Final]

at org.jboss.as.ejb3.tx.CMTTxInterceptor.required(CMTTxInterceptor.java:304) [jboss-as-ejb3-7.1.1.Final.jar:7.1.1.Final]

at org.jboss.as.ejb3.tx.CMTTxInterceptor.processInvocation(CMTTxInterceptor.java:190) [jboss-as-ejb3-7.1.1.Final.jar:7.1.1.Final]

at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final]

at org.jboss.as.ejb3.component.interceptors.CurrentInvocationContextInterceptor.processInvocation(CurrentInvocationContextInterceptor.java:41) [jboss-as-ejb3-7.1.1.Final.jar:7.1.1.Final]

at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final]

at org.jboss.as.ejb3.component.interceptors.LoggingInterceptor.processInvocation(LoggingInterceptor.java:59) [jboss-as-ejb3-7.1.1.Final.jar:7.1.1.Final]

at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final]

at org.jboss.as.ee.component.NamespaceContextInterceptor.processInvocation(NamespaceContextInterceptor.java:50) [jboss-as-ee-7.1.1.Final.jar:7.1.1.Final]

at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final]

at org.jboss.as.ejb3.component.interceptors.AdditionalSetupInterceptor.processInvocation(AdditionalSetupInterceptor.java:32) [jboss-as-ejb3-7.1.1.Final.jar:7.1.1.Final]

at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final]

at org.jboss.as.ee.component.TCCLInterceptor.processInvocation(TCCLInterceptor.java:45) [jboss-as-ee-7.1.1.Final.jar:7.1.1.Final]

at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final]

at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final]

at org.jboss.as.ee.component.ViewService$View.invoke(ViewService.java:165) [jboss-as-ee-7.1.1.Final.jar:7.1.1.Final]

at org.jboss.as.ee.component.ViewDescription$1.processInvocation(ViewDescription.java:173) [jboss-as-ee-7.1.1.Final.jar:7.1.1.Final]

at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final]

at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61) [jboss-invocation-1.1.1.Final.jar:1.1.1.Final]

at org.jboss.as.ee.component.ProxyInvocationHandler.invoke(ProxyInvocationHandler.java:72) [jboss-as-ee-7.1.1.Final.jar:7.1.1.Final]

at com.example.TestEJB$$$view1.getEmployee(Unknown Source) [Bar.jar:]

at com.example.StartUpServlet.init(StartUpServlet.java:27) [classes:]

at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1202) [jbossweb-7.0.13.Final.jar:]

at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1102) [jbossweb-7.0.13.Final.jar:]

at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:3655) [jbossweb-7.0.13.Final.jar:]

at org.apache.catalina.core.StandardContext.start(StandardContext.java:3873) [jbossweb-7.0.13.Final.jar:]

at org.jboss.as.web.deployment.WebDeploymentService.start(WebDeploymentService.java:90) [jboss-as-web-7.1.1.Final.jar:7.1.1.Final]

at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1811)

at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1746)

at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) [rt.jar:1.6.0_17]

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) [rt.jar:1.6.0_17]

at java.lang.Thread.run(Thread.java:619) [rt.jar:1.6.0_17]

How Do I resolve this issue, should I have to specify any dependency in jboss-structure / MANIFEST.MF ?

This issue does not occur in jboss 4.3

Attached my sample project for your reference.

test1.zip 19.1 KB

1. Re: access protected/default methods from ejb , java.lang.IllegalAccessError: tried to access method

sfcoy May 16, 2013 9:28 AM (in response to surendrand001)

This occurs because the classes in each module are loaded by different classloaders, and package protection does not extend between classloaders.
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2. Re: access protected/default methods from ejb , java.lang.IllegalAccessError: tried to access method

krr24um May 17, 2013 4:58 AM (in response to sfcoy)

So is there a concrete solution for this kind of issue,the workaround mentioned in forums asks us to make use of jboss-deployment-structure.xml,but dont think that works out when you have interdependencies across many jars within the ear...

For instance if we have 4 ejb jars, ejb 1 uses ejb 2 and ejb4... and ejb 2 uses ejb 3,how do you propose having the jboss-deployment structure,if we have the same jar in two places we get another exception where in the class loads twice
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3. Re: access protected/default methods from ejb , java.lang.IllegalAccessError: tried to access method

sfcoy May 17, 2013 9:02 AM (in response to krr24um)

The pragmatic solution to the original poster's problem is to make the method/constructor public.
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4. Re: access protected/default methods from ejb , java.lang.IllegalAccessError: tried to access method

surendrand001 May 23, 2013 12:20 AM (in response to sfcoy)

I cannot change my protected/default methods due to our design & coding restrictions.

However I am able to resolve the issue using following work around

created a TestEJB an empty ejb project. included the same in application.xml and modified the jboss-deployment-structure.xml as follows

<sub-deployment name="TestEJB.jar">
          <resources>
                    <resource-root path="Foo.jar"/>
                    <resource-root path="Bar.jar"/>
          </resources>
</sub-deployment>
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