Hi, I am trying to experiment with Loom
(https://openjdk.java.net/jeps/425) virtual threads in Tomcat 10. There
is a nice extension point in server.xml where I can provide an Executor
and use it in the default Connector. It works like a charm--all my
requests run on a virtual thread, and AFAIK, nothing else does.
There is just one issue. It takes forever for Tomcat to execute the
virtual threads. I made a timestamp for each invocation of
public void execute(Runnable command)
called from org.apache.tomcat.util.net.AbstractEndpoint.processSocket
When I fire 1000 simultaneous requests, I can see that method being
invoked 1000 times, but it takes a while to work through the requests.
The last invocation occurs two minutes (!) from the sending of the requests.
When using the org.apache.catalina.core.StandardThreadExecutor, that
many requests are handled in 3 seconds.
Is there something that I am overlooking? I had hoped that execute would
be called near-instantly 1000 times, and then the Loom virtual threads
could show their mettle and execute concurrently.
Thanks,
Cay
--
Cay S. Horstmann | http://horstmann.com | mailto:c...@horstmann.com
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