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When using an application server like Jetty or Tomcat, does ktor utilise the underlying threadpool of those servers to handle executing logic of a routing handler (seems like the threadpool is only used to accept connection and read the request data from those connections), or does it just use its own `ThreadPoolExecutor` ?

In the case of jetty, I can see that the handler creates its own `ThreadPoolExecutor` , and the `execute` function of the Jetty embedded server (which will call to the underlying threadpool of Jetty to fun a task) was never stopped at during the execution of a call in debug mode, which indicates it was not called at all.

As I can see, the thread executor created in the `JettyKtorHandler` is used to handle HTTP calls. The name of the current header logged in the handler matches the thread name defined for the executer. For example:
```ktor-jetty-9000-17```
Can you describe your problem in more detail?

There wasn't any particular problem that I had. I just want to confirm that the ktor server doesn't use the underlying web server (jetty)'s thread pool, but instead it creates its own executor pool.