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0 Replies Latest reply: Apr 9, 2012 4:50 AM by 928159 RSS

How can I change java.policy at runtim on client machines using java webst?

928159 Newbie
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Hi,

I have to change java.policy to launch my application through webstart to provide one RuntimePermission "permission java.lang.RuntimePermission "getClassLoader";"
Its because of a bug in java bug "_http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4809366_"

So, my problem here is, how can I do this dynamically on each client machine's java.policy.

I have spent time on this and found some alternatives

1. Specifying an Additional Policy File at Runtime by launching application "java -Djava.security.manager -Djava.security.policy=someURL SomeApp"
Please refer more on this "http://docs.oracle.com/javase/6/docs/technotes/guides/security/PolicyFiles.html"

But, here the problem is, how can I do this using webstart (expert.jnlp) file even though I have the "java-vm-args" tag, its not supporting this argument.
Please refer "http://docs.oracle.com/javase/6/docs/technotes/guides/javaws/developersguide/syntax.html#security";

2. Implementing the Policy in code.
But, not sure how to do this..

How can I grant the runtime permission on every user's machine dynamycally?

Here are some background details on this:

I am using java6 and weblogic 10.3.3.

Here is thing that I tried,

My application downloads a few jars to the client machines using java webstart and then it will get the initial context using the t3 protocal. The jars include wlclient.jar and ojdbc6.jar initially.

The problem here I was facing, when I tried request a bean, it is giving me the following exception in the client logs.It is requesting one state less session bean and I checked the server logs as well and the bean has returned the expected values properly.

But here I observed one more thing, before this request, one session bean(state less) has been requested successfully.

java.rmi.MarshalException: CORBA MARSHAL 0 No; nested exception is:
org.omg.CORBA.MARSHAL: vmcid: 0x0 minor code: 0 completed: No
at com.sun.corba.se.impl.javax.rmi.CORBA.Util.mapSystemException(Unknown Source)
at javax.rmi.CORBA.Util.mapSystemException(Unknown Source)
at com.mbt.expert.server.util._ServerDBQueryObjectRemote_Stub.getExchangeList(Unknown Source)
at com.mbt.expert.util.DBQueryObject.getExchangeList(DBQueryObject.java:419)
at com.mbt.expert.view.dialogs.OpenExchangeDialog.actionPerformed(OpenExchangeDialog.java:425)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$000(Unknown Source)
at java.awt.EventQueue$1.run(Unknown Source)
at java.awt.EventQueue$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$2.run(Unknown Source)
at java.awt.EventQueue$2.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.Dialog$1.run(Unknown Source)
at java.awt.Dialog$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.Dialog.show(Unknown Source)
at com.mbt.expert.view.dialogs.OpenExchangeDialog.displayDialog(OpenExchangeDialog.java:606)
at com.mbt.expert.mdi.actions.OpenExchangeAction.execute(OpenExchangeAction.java:204)
at com.mbt.mdi.MDICommand.actionPerformed(MDICommand.java:47)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
at java.awt.AWTEventMulticaster.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$000(Unknown Source)
at java.awt.EventQueue$1.run(Unknown Source)
at java.awt.EventQueue$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$2.run(Unknown Source)
at java.awt.EventQueue$2.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
Caused by: org.omg.CORBA.MARSHAL: vmcid: 0x0 minor code: 0 completed: No
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at java.lang.Class.newInstance0(Unknown Source)
at java.lang.Class.newInstance(Unknown Source)
at com.sun.corba.se.impl.protocol.giopmsgheaders.MessageBase.getSystemException(Unknown Source)
at com.sun.corba.se.impl.protocol.giopmsgheaders.ReplyMessage_1_2.getSystemException(Unknown Source)
at com.sun.corba.se.impl.protocol.CorbaMessageMediatorImpl.getSystemExceptionReply(Unknown Source)
at com.sun.corba.se.impl.protocol.CorbaClientRequestDispatcherImpl.processResponse(Unknown Source)
at com.sun.corba.se.impl.protocol.CorbaClientRequestDispatcherImpl.marshalingComplete(Unknown Source)
at com.sun.corba.se.impl.protocol.CorbaClientDelegateImpl.invoke(Unknown Source)
at org.omg.CORBA.portable.ObjectImpl._invoke(Unknown Source)
... 80 more

The same is working in some other machine which are in different network. So, I have replaced the wlclient.jar with the wlthint3client.jar.

After replacing this jar I was getting the below exception in client logs while requesting a state less session bean.I also checked whether the request is reaching the server (bean) or not, but its not reaching the server.The problem is same at all the machines irrespective of the networks.

java.lang.AssertionError: Failed to generate class for com.mbt.expert.server.session.LoginSessionBean_tqw6yu_HomeImpl_1033_WLStub
at weblogic.rmi.internal.StubGenerator.generateStub(StubGenerator.java:797)
at weblogic.rmi.internal.StubGenerator.generateStub(StubGenerator.java:786)
at weblogic.rmi.extensions.StubFactory.getStub(StubFactory.java:74)
at weblogic.rmi.internal.StubInfo.resolveObject(StubInfo.java:213)
at weblogic.rmi.internal.StubInfo.readResolve(StubInfo.java:207)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at java.io.ObjectStreamClass.invokeReadResolve(Unknown Source)
at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.readObject(Unknown Source)
at weblogic.utils.io.ChunkedObjectInputStream.readObject(ChunkedObjectInputStream.java:197)
at weblogic.rjvm.MsgAbbrevInputStream.readObject(MsgAbbrevInputStream.java:598)
at weblogic.utils.io.ChunkedObjectInputStream.readObject(ChunkedObjectInputStream.java:193)
at weblogic.rmi.internal.ObjectIO.readObject(ObjectIO.java:62)
at weblogic.rjvm.ResponseImpl.unmarshalReturn(ResponseImpl.java:240)
at weblogic.rmi.cluster.ClusterableRemoteRef.invoke(ClusterableRemoteRef.java:348)
at weblogic.rmi.cluster.ClusterableRemoteRef.invoke(ClusterableRemoteRef.java:259)
at weblogic.jndi.internal.ServerNamingNode_1033_WLStub.lookup(Unknown Source)
at weblogic.jndi.internal.WLContextImpl.lookup(WLContextImpl.java:405)
at weblogic.jndi.internal.WLContextImpl.lookup(WLContextImpl.java:393)
at javax.naming.InitialContext.lookup(Unknown Source)
at com.mbt.expert.mdi.ExpertVariable.getLoginSession(ExpertVariable.java:455)
at com.mbt.expert.view.dialogs.Login.okPressed(Login.java:187)
at com.mbt.expert.view.dialogs.Login.keyPressed(Login.java:141)
at java.awt.Component.processKeyEvent(Unknown Source)
at javax.swing.JComponent.processKeyEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.KeyboardFocusManager.redispatchEvent(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.dispatchEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.Dialog$1.run(Unknown Source)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at weblogic.rmi.internal.StubGenerator.generateStub(StubGenerator.java:795)
... 55 more
Caused by: java.security.AccessControlException: access denied (java.lang.RuntimePermission getClassLoader)
at java.security.AccessControlContext.checkPermission(Unknown Source)
at java.security.AccessController.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkPermission(Unknown Source)
at java.lang.ClassLoader.getSystemClassLoader(Unknown Source)
at weblogic.utils.classloaders.AugmentableClassLoaderManager.getAugmentableClassLoader(AugmentableClassLoaderManager.java:48)
at weblogic.rmi.internal.ClientRuntimeDescriptor.findLoader(ClientRuntimeDescriptor.java:254)
at weblogic.rmi.internal.ClientRuntimeDescriptor.getInterfaces(ClientRuntimeDescriptor.java:132)
at weblogic.rmi.internal.StubInfo.getInterfaces(StubInfo.java:77)
at com.mbt.expert.server.session.LoginSessionBean_tqw6yu_HomeImpl_1033_WLStub.ensureInitialized(Unknown Source)
at com.mbt.expert.server.session.LoginSessionBean_tqw6yu_HomeImpl_1033_WLStub.<init>(Unknown Source)
... 60 more

I have tried one more thing, I have taken all the required jars to one of the client machines and executed the main class (by setting the required class path) from cmd using java instead of javaws. Surprisingly, its working fine with out any problem using the wlthint3client.jar.

I also tried the same, by placing wlclient.jar using java in the same way(from cmd instead of javaws ), but I was facing the same exception while requesting the second session bean and found the same above exception in client logs.


To resolve this, I come across the java bug that I have given earlier "_http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4809366_".

In that page, I found a work around for this; suggested by bea to add the Runtime permission "permission java.lang.RuntimePermission "getClassLoader";" to the clients java.policy

So, please suggest me a way to resolve this problem.

Please suggest me if you have any other solutions for this problem.

Thanks in advance :)

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