MBean operation works only after invoking operation from jmx

[gtjonesy]

Hi,

Using 4.2.2

I am having what looks like a strange problem but hopping that is something simple. I have look in many different places to find an answer but I am not sure if I am looking for the right thing.

I have an MBean that was created using this approach

@Service (objectName="platform:service=foo")
@Management (foo.class)

That stores some information that is updated periodically.

I have a class in a struts2 action that does this to access the data

MBeanServer server = org.jboss.mx.util.MBeanServerLocator.locateJBoss();
 ObjectName name = new ObjectName("platform:service=foo");

return (Collection) server.invoke(name, "fooMethod", null, null);

The problem that I have is that this code does not work. I get this error:

Caused by: java.lang.NullPointerException
 at org.jboss.ejb3.service.ServiceMBeanDelegate.getOperation(ServiceMBeanDelegate.java:380)
 at org.jboss.ejb3.service.ServiceMBeanDelegate.invoke(ServiceMBeanDelegate.java:214)
 ... 151 more

But if I invoke the operation from jmx-console the method works like it should.

Any help on what I am missing would be greatly appreciated.

Thanks in advanced,
Greg

[gtjonesy]

I used a different method

MBeanServer server = MBeanServerLocator.locate();

Foo foo = (Foo) MBeanProxyExt.create(
 Foo.class,
 name,
 server);

return foo.operation();

which gave me a different error and I was able to track that down to multiple jars on the classpath.

- Greg

[schmiegelow]

Hello,

i had the same problem. If you add a parameter to the method, for instance a boolean, then it works.

strange behaviour if you ask me,

cheers