Virtual Threads - deadlock with synchronized (Main.class) and System.out.println

[Dr Heinz M. Kabutz]

Hi Ron,

should this also be emitted with the -Djdk.tracePinnedThreads=full 
event? It doesn't seem to be at the moment.

Regards

Heinz
-- 
Dr Heinz M. Kabutz (PhD CompSci)
Author of "The Java™ Specialists' Newsletter" - www.javaspecialists.eu
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Tel: +30 69 75 595 262
Skype: kabutz

On 2023/07/18 01:18, Ron Pressler wrote:
> The problem can occur whenever a shared j.u.c lock is acquired both inside and outside a synchronized (and println acquires a shared lock for the output stream). For now, this can be detected with the JFR pinning event, and the fix is to replace the synchronized that guards the lock acquisition with a j.u.c lock.