THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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I have done some testing with an OpenEJB example, namely CounterImpl, that you can co from https://svn.apache.org/repos/asf/openejb/trunk/openejb3/examples/simple-stateful. Note that you need to update CounterImpl so that it implements Serializable.
And here is the geronimo-opejnejb.xml plan I am using:
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