On 4/21/09 11:28 AM, Lloyd Chambers wrote:
> Richard,
>
> What's I find bizzare is that both modules involved are both compiling
> against javax.management.ObjectName, and have *already loaded and used
> it*.
>
> It's only when an ObjectName[] is returned through
> java.lang.reflect.Proxy that the receiving module barfs—but it already
> has loaded that class previously, and it also depends transitively via
> a <dependency> on the module supplying the ObjectName[].
>
> That's what makes it so hard to accept it as something other than a bug.
>
> I need a step-by-step instructions on how to work around this issue:
> what goes in pom.xml? what goes in a manifest file? In short, what do
> I do?
Well, I don't really know what the issue is here, I am just guessing.
In some situations the JRE classes assume they can use any arbitrary
class loader to load any given class on the class path. This assumptions
breaks in OSGi, since bundles do not have access to everything on the
class path. So, there could be something like that going on here too.
-> richard
>
>
> Lloyd
>
> On Apr 21, 2009, at 8:15 AM, Lloyd Chambers wrote:
>
>> Richard,
>>
>> With modularity comes complexity it seems.
>>
>> To me, a fundamental correctness proposition has been broken: a
>> program that works with the standard JDK doesn't work any more.
>>
>> This is a bug notwithstanding the justifications.
>>
>> Lloyd
>>
>> On Apr 21, 2009, at 7:23 AM, Richard S. Hall wrote:
>>
>>> Lloyd,
>>>
>>> A bundle is only given implicit access to classes in java.*
>>> packages. All other packages must be imported. This includes javax.*
>>> packages. The reason is because javax packages are extensions. It is
>>> possible for them not to be there or for bundles to container newer
>>> versions. This would not be the case for java.* packages, which must
>>> be loaded by the boot class loader.
>>>
>>> -> richard
>>>
>>> On 4/21/09 10:15 AM, Lloyd Chambers wrote:
>>>> Richard,
>>>>
>>>> javax.management.ObjectName is part of the JDK. I've never had to
>>>> import the JDK. Could I be misinterpreting the error?
>>>>
>>>> The class javax.management.ObjectName has been used extensively
>>>> prior to that error, of course immediately prior since I just made
>>>> the list.
>>>>
>>>> Lloyd
>>>>
>>>> On Apr 21, 2009, at 12:52 AM, Richard S. Hall wrote:
>>>>
>>>>> And you are sure your bundle has imported that package?
>>>>>
>>>>> -> richard
>>>>>
>>>>> On 4/20/09 9:15 PM, Lloyd Chambers wrote:
>>>>>> There seems to be something very broken about the Felix classloader.
>>>>>>
>>>>>> I have a java.lang.reflect.Proxy implementing method:
>>>>>>
>>>>>> public ObjectName[] getChildren();
>>>>>>
>>>>>> My handler returns a non-null ObjectName[] as it should. After
>>>>>> that, it goes haywire:
>>>>>>
>>>>>> ===> the Felix classloader says it cannot find a standard JDK
>>>>>> class: javax.management.ObjectName! See the
>>>>>> ClassNotFoundException below.
>>>>>>
>>>>>>
>>>>>> Lloyd
>>>>>>
>>>>>> INFO: invoke: getChildren, result =
>>>>>> [Ljavax.management.ObjectName;@64015331
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> INFO: invoke: getChildren, return result =
>>>>>> [Ljavax.management.ObjectName;@64015331
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: java.lang.reflect.InvocationTargetException
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: at
>>>>>> sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: at
>>>>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>>>>>
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: at
>>>>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>>>>>
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: at java.lang.reflect.Method.invoke(Method.java:597)
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: at
>>>>>> org.glassfish.admin.amx.impl.mbean.AMXImplBase.getAttributeByMethod(AMXImplBase.java:588)
>>>>>>
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: at
>>>>>> org.glassfish.admin.amx.impl.mbean.AMXImplBase.getAttributeInternal(AMXImplBase.java:505)
>>>>>>
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: at
>>>>>> org.glassfish.admin.amx.impl.mbean.AMXImplBase.getAttribute(AMXImplBase.java:460)
>>>>>>
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: at
>>>>>> org.glassfish.admin.amx.impl.mbean.AMXImplBase.getAttributes(AMXImplBase.java:544)
>>>>>>
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: at
>>>>>> com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getAttributes(DefaultMBeanServerInterceptor.java:726)
>>>>>>
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: at
>>>>>> com.sun.jmx.mbeanserver.JmxMBeanServer.getAttributes(JmxMBeanServer.java:665)
>>>>>>
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: at
>>>>>> javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1407)
>>>>>>
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: at
>>>>>> javax.management.remote.rmi.RMIConnectionImpl.access$200(RMIConnectionImpl.java:72)
>>>>>>
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: at
>>>>>> javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1264)
>>>>>>
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: at
>>>>>> javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1359)
>>>>>>
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: at
>>>>>> javax.management.remote.rmi.RMIConnectionImpl.getAttributes(RMIConnectionImpl.java:636)
>>>>>>
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: at
>>>>>> sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: at
>>>>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>>>>>
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: at
>>>>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>>>>>
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: at java.lang.reflect.Method.invoke(Method.java:597)
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: at
>>>>>> sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:305)
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: at sun.rmi.transport.Transport$1.run(Transport.java:159)
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: at java.security.AccessController.doPrivileged(Native
>>>>>> Method)
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: at
>>>>>> sun.rmi.transport.Transport.serviceCall(Transport.java:155)
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: at
>>>>>> sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535)
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: at
>>>>>> sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:790)
>>>>>>
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: at
>>>>>> sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:649)
>>>>>>
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: at
>>>>>> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
>>>>>>
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: at
>>>>>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
>>>>>>
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: at java.lang.Thread.run(Thread.java:637)
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: Caused by: java.lang.NoClassDefFoundError:
>>>>>> [Ljavax/management/ObjectName;
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: at $Proxy74.getChildren(Unknown Source)
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: at
>>>>>> org.glassfish.admin.amx.impl.ext.RuntimeMgrImpl.getProtocol(RuntimeMgrImpl.java:123)
>>>>>>
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: at
>>>>>> org.glassfish.admin.amx.impl.ext.RuntimeMgrImpl.getRESTBaseURL(RuntimeMgrImpl.java:152)
>>>>>>
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: ... 29 more
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: Caused by: java.lang.ClassNotFoundException:
>>>>>> javax.management.ObjectName
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: at
>>>>>> org.apache.felix.framework.searchpolicy.ModuleImpl.findClassOrResourceByDelegation(ModuleImpl.java:565)
>>>>>>
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: at
>>>>>> org.apache.felix.framework.searchpolicy.ModuleImpl.access$100(ModuleImpl.java:59)
>>>>>>
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: at
>>>>>> org.apache.felix.framework.searchpolicy.ModuleImpl$ModuleClassLoader.loadClass(ModuleImpl.java:1434)
>>>>>>
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: at
>>>>>> java.lang.ClassLoader.loadClassInternal(ClassLoader.java:374)
>>>>>> Apr 20, 2009 6:11:21 PM
>>>>>> SEVERE: ... 32 more
>>>>>>
>>>>>>
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>>>>>
>>>>> ---------------------------------------------------------------------
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>>>>> <mailto:dev-help_at_glassfish.dev.java.net>
>>>>>
>>>>
>>>> Lloyd Chambers
>>>> lloyd.chambers_at_sun.com <mailto:lloyd.chambers_at_sun.com>
>>>> GlassFish Team
>>>>
>>>>
>>>>
>>
>> Lloyd Chambers
>> lloyd.chambers_at_sun.com <mailto:lloyd.chambers_at_sun.com>
>> GlassFish Team
>>
>>
>>
>
> Lloyd Chambers
> lloyd.chambers_at_sun.com <mailto:lloyd.chambers_at_sun.com>
> GlassFish Team
>
>
>