JMX 1.2.2_r026
JMX Remote 1.0.1 b40
J2SE 1.4.2_03

The TCK tests
api/javax/management/remote/JMXConnector/optional/index.html#JMXMPConnectorTest
and
api/javax/management/remote/JMXConnector/optional/index.html#GenericConnectorTest
both fail for the same reason.

Test extract :

        /**
         * Test Case : 2
         * Input:
         * Action: Check the connect() method
         * Create a connector server and a connector client.
         * Do not start the server and try to connect the client.
         * Finally, close the connection and stop the server.
         * Output: IOException after the connect
         */
        <trunc>
        ref.println("An IOException is expected.");
        connector.connect();
        ref.println("(ERROR) Expected IOException not raised");

That test fails on RedHat 9 as it pass with Solaris 9 (both Sparc and X86) and RedHat AS 2.1.
When it fails, we stay stuck on the connect() call;
JavaTest harness has no other choice than stopping the test after time out expires.

I did a try where I do activate the JMX Remote debugging. Results are then different, the test goes further but blocks in test case 6 for the same reason.
I attached the output that exhibits several stacks (SocketException, BindException, NPE).