These JDK 7 tests fail when run with jtreg 4.1 b05 with the -samevm option
The error is:
Failed. Execution failed\: `main' threw exception\: java.lang.RuntimeException\: java.lang.NoClassDefFoundError\: JavacTestingAbstractProcessor
The tests have been fixed in JDK 8 - see the related jbs entries shown below.
It seems likely that these fixes will have to be backported to 6, 6open.