Test failing on mach5 with error

java.lang.RuntimeException: No owned windows for JFrame - no tooltip shown?
at bug5078214.test(bug5078214.java:116)
at bug5078214.main(bug5078214.java:92)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:565)
at com.sun.javatest.regtest.agent.MainWrapper$MainTask.run(MainWrapper.java:138)
at java.base/java.lang.Thread.run(Thread.java:1447)

JavaTest Message: Test threw exception: java.lang.RuntimeException: No owned windows for JFrame - no tooltip shown?
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.RuntimeException: No owned windows for JFrame - no tooltip shown?