Zombie processes remain in workspace container after a task is terminated.

[akurinnoy]

Describe the bug

While working in che-code, I encountered a lot of processes labeled <defunct> in my workspace container. I noticed that every time a devfile task or corresponding yarn script gets terminated, one or more zombie processes appear.

Che version

next (development version)

Steps to reproduce

1. Clone repository git@github.com:eclipse-che/che-dashboard.git
2. Run the task "Install dependencies".
3. Open the terminal and run the top command (and hit c to see more than just the command name). You may see some zombie processes at this point.
4. Split the terminal, run yarn build, and terminate it in a minute.
   • Alternatively, run the "build" task, and terminate it in a minute.
5. In the terminal where the top command runs, you can see a few more zombie processes.
6. You can try steps 4-5 with other tasks, e.g. "watch frontend", and "watch backend".

Expected behavior

No zombie processes should remain after a task termination.

Runtime

OpenShift

Screenshots

https://youtu.be/yWVRiQFYfxs

Installation method

other (please specify in additional context)

Environment

other (please specify in additional context)

Eclipse Che Logs

No response

Additional context

No response

[vitaliy-guliy]

I got the same when I played with ssh service. I've just started and stopped it several times by a command in terminal

[vitaliy-guliy]

I've just double checked it on the dogfooding instance and haven't faced any issues anymore.
No zombie processes appeared after running yarn install command.
I tried to launched yarn in both VS Code terminal and in the OpenShift console terminal. In both cases it was successful.