Windows Service always listening on port8080, even when killed

Question

I have a problem when i start my application by Spring, the port 8080 is allready listening by a service, which is "rundll32.exe", apparently a legitime file from system32, but even when i kill it, it come back, here is my prompt commands:

tasklist | findstr 15448
rundll32.exe                 15448 Services                   0     56,592 K

netstat -ano | findstr 8080
  TCP    0.0.0.0:8080           0.0.0.0:0              LISTENING       15448

taskkill /F /pid 15448
SUCCESS: The process with PID 15448 has been terminated.

netstat -ano | findstr 8080
  TCP    0.0.0.0:8080           0.0.0.0:0              LISTENING       9796

tasklist | findstr 9796
rundll32.exe                  9796 Services                   0     55,976 K

As you can see, the service always listening the port8080. I tried to search a solution but i did not find a similar problem on the internet. Have you any suggestion? (I killed the rundll32 process in the Services list, but nothing has change)

You killed it but the service manager automatically restarted it. You need to work with the service manager, send a "stop service" command, and not just terminate the service worker (which will result in recovery logic) — Ben Voigt, Jan 09 '20 at 15:16
Note that "How do I take port 8080 away from a program already using it?" and "How do I stop a service?" are computer administration questions, not computer programming questions. (Once you reach the point where you know how to do it by hand, and want to write a program to do it, then it becomes a programming question again) So the proper site is superuser.com not stackoverflow.com — Ben Voigt, Jan 09 '20 at 15:18
Ok, the problem appear during spring-boot process, but yes it's definitively an administration issue. I will ask the question at superuser. Thank you. (i stoped the service but he is always listening) — Lucian, Jan 09 '20 at 15:45

score 0 · Answer 1 · answered Jan 09 '20 at 15:47

Many applications in Windows use dynamic-link library (DLL) files to do a great number of things , simply trying to kill this particular task may result in the task being automatically restarted as it may be a necessary task for applications that may be running. Specifically the rundll32.exe is used to launch functionality stored in shared dll files. This is a valid part of Windows, and normally should not cause a problem. However, if your system does not have a legitimate reason to be listening on port 8080 and your system is somehow corrupted try following this link [1] for reparation instructions.

[1] Use the System File Checker tool to repair missing or corrupted system files : https://support.microsoft.com/en-us/help/929833/use-the-system-file-checker-tool-to-repair-missing-or-corrupted-system

Windows Service always listening on port8080, even when killed

1 Answers1