Virtual threads take the responsibility for allocating system resources out of your application code and into the JVM. Here's a first look at virtual threads in Java 21.

Detecting Java Threads in Deadlock with Groovy and JMX. by Dustin Marx. ... (3792 in my case), one can simply type jstack 3792 to see a thread dump for that application.

JDK 21's virtual threads are a major leap forward for Java's concurrency model. Previously, Java relied on OS threads, which were resource-heavy, limiting how many threads could run concurrently.