Hello, AWT Team. Please review the one-liner fix for the issue: https://bugs.openjdk.java.net/browse/JDK-8041904 The fix is available here: http://cr.openjdk.java.net/~pchelko/9/8041904/webrev/
The problem's that realSync could hang if called during or immediately after DnD operation. I have a bug about this, but I still cannot provide a reliable and simple solution. Everything I have is way overcomplex. This is the only test I know which's affected by the realSync problem, so let's fix it and defer the realSync hang. With best regards. Petr.