adb process blocks rocket socket port on windows after exit

[cocoon]

Hello,

I am very new to rust and face a problem on windows currently.
I hope someone has a hint, as I fail to find a solution with my searches.

DEMO
I uploaded a small example program to demonstrate my problem:
https://github.com/cocoon/rust_process_demo

Long description

I want to spawn other processes from rocket like adb.exe.
The problem is, that adb.exe keeps blocking the port and prevents rocket to be launched again after it was stopped.

The problem can be "seen" for example with nirsoft "CurrPorts":
https://www.nirsoft.net/utils/cports.html#DownloadLinks

After shutting down rocket (process_test.exe) with ctrl + c it is still visible as open port on CurrPorts:

In TaskManager the process is gone, searching for the PID returns: not found.

When I then start the process_test.exe again ,it fails to bind the port and rocket throws the error:
Error: Rocket failed to bind network socket to given address/port.

I already tried to use creation_flags or to spawn it with cmd but it still fails to really detach the process or to kill adb.exe together with the parent process like it does on linux.

const _CREATE_NO_WINDOW: u32 = 0x08000000; const _DETACHED_PROCESS: u32 = 0x00000008; const _CREATE_NEW_PROCESS_GROUP: u32 = 0x00000200;

Any idea how to spawn it and keep adb.exe running without blocking the port?

many thanks in advance!