[External] : Re: Dropped task -- feature or bug?

[Alan Bateman]

On 17/05/2022 14:42, Brian S O'Neill wrote:
> A virtual thread which is blocked with a timeout performs some form of 
> registration, does it not? Is there an expectation that virtual 
> threads are more likely to be blocked with infinite timeouts, and that 
> this blocking is frequent enough that the registration step is too 
> costly?
>
> Perhaps it would make sense to add an option (system property) that 
> would enable registration when a virtual thread is blocked, as a 
> debugging tool?


A thread that parks with a timeout will continue when the waiting time 
expires, so it can't be GC'ed.

If you really want to see these orphaned threads in the heap dump or 
thread dump then you can run with -Djdk.trackAllThreads.

-Alan.