Reproducable with JDK 7 b125 on linux0i586 and VM options -client -Xcomp -XX:+StartAttachListener -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode.

http://vmsqe.russia.sun.com/execution/results/JDK7/PROMOTION/VM/7/b125/ConcMarkSweepIncGC/javase/linux-i586/client/comp/linux-i586_javase__client_comp_JT_JDK_java_lang/analysis.html

java.lang.RuntimeException: Runnable test: app thread did not terminate
at StopBeforeStart.runit(StopBeforeStart.java:126)
at StopBeforeStart.doit(StopBeforeStart.java:102)
at StopBeforeStart.main(StopBeforeStart.java:94)
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:613)
at com.sun.javatest.regtest.MainWrapper$MainThread.run(MainWrapper.java:94)
at java.lang.Thread.run(Thread.java:732)

JavaTest Message: Test threw exception: java.lang.RuntimeException: Runnable test: app thread did not terminate
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.RuntimeException: Runnable test: app thread did not terminate
result: Failed. Execution failed: `main' threw exception: java.lang.RuntimeException: Runnable test: app thread did not terminate
Sometime the test fails with a bit diferent log:

java.lang.RuntimeException: Thread test: app thread did not terminate
at StopBeforeStart.runit(StopBeforeStart.java:126)
at StopBeforeStart.doit(StopBeforeStart.java:101)
at StopBeforeStart.main(StopBeforeStart.java:94)
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:613)
at com.sun.javatest.regtest.MainWrapper$MainThread.run(MainWrapper.java:94)
at java.lang.Thread.run(Thread.java:732)

JavaTest Message: Test threw exception: java.lang.RuntimeException: Thread test: app thread did not terminate
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.RuntimeException: Thread test: app thread did not terminate
result: Failed. Execution failed: `main' threw exception: java.lang.RuntimeException: Thread test: app thread did not terminate