MBeanServer.queryNames() not working

[pcallies]

If it's user error, I hope someone can point it out to me. I'm using version 3.0.6. I have one MBean that is attempting to use MBeanServer.queryNames() to look up other MBeans. However, queryNames() is returning an empty Set.

Here's the code:
QueryExp nameExp =
Query.match(Query.attr("name"), Query.value("XTFResource"));
QueryExp exp = nameExp;
ObjectName scope = new ObjectName("tsh:*");
logger.debug("Query expression="+ exp);
logger.debug("Scope="+ scope);

ArrayList mbeanServers = MBeanServerFactory.findMBeanServer(null);
Iterator iter = mbeanServers.iterator();
while (iter.hasNext()) {
MBeanServer mbeanServer = (MBeanServer) iter.next();
Set names = mbeanServer.queryNames(scope, exp);
logger.debug("Found XTFResources: " + names);

The logging output is:
Query expression=(name matches XTFResource)
Scope=tsh:*

When I ran the method, the following MBean was registered, but queryNames did not return it.
Domain Name: tsh name: XTFResource

[juhalindfors]

MBean attribute names start with an upper case character

[pcallies]

That's what Scott Stark had suggested on the users' mailing list. I tried it, but it didn't work.

I don't understand why the attribute names would be uppercase when they're defined lowercase.

[pcallies]

One more comment: the examples in your JMX book use lowercase.