Greetings all, I was recently introduced to the deadlock described in JDK-8047720 and fixed in JDK9. The fix seems a little messy to me, and it looks like it left some very short races in the code. So I decided to clean up the code. See attached diff.
The change takes a step back and acquires PeriodicTask_lock in WatcherThread::stop (like before the fix in JDK9), but this time safepoints are allowed to proceed when acquiring PeriodicTask_lock, preventing the deadlock. Let me know what you think, Carsten
patch
Description: Binary data
