The test can be seen to fail intermittently on a very busy system. The test tries to bind to a "hardcoded" (relative to another) port number. I see no reason for specify the port number in this testcase. The socket needs to be bound to a specific address, but we should be able to specify a port of 0 (ephemeral port). #section:main ----------messages:(3/115)---------- command: main B6521014 reason: Assumed action based on file name: run main B6521014 elapsed time (seconds): 0.026 ----------System.err:(19/935)---------- java.lang.RuntimeException: Test failed: cannot create socket. at B6521014.main(B6521014.java:125) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:477) at com.sun.javatest.regtest.MainAction$SameVMRunnable.run(MainAction.java:706) at java.lang.Thread.run(Thread.java:722) Caused by: java.net.BindException: Address already in use at java.net.PlainSocketImpl.socketBind(Native Method) at java.net.AbstractPlainSocketImpl.bind(AbstractPlainSocketImpl.java:382) at java.net.Socket.bind(Socket.java:626) at B6521014.test2(B6521014.java:105) at B6521014.main(B6521014.java:123) ... 6 more JavaTest Message: Test threw exception: java.lang.RuntimeException JavaTest Message: shutting down test result: Failed. Execution failed: `main' threw exception: java.lang.RuntimeException: Test failed: cannot create socket. test result: Failed. Execution failed: `main' threw exception: java.lang.RuntimeException: Test failed: cannot create socket.