Hanging of request for getting processId for terminal

[RomanNikitenko]

Describe the bug

I run a che task and can get processId for related terminal while task is running, but request for processId is hanging after refreshing page if the task is completed.

Che version

• latest
• nightly
• other: please specify

Steps to reproduce

1. Add the configuration to tasks.json file

       {
            "type": "che",
            "label": "test che task",
            "command": "sleep 3 && echo che task is completed",
            "problemMatcher": []
        }

2. Run the task
3. Try to get processId for related terminal
   You can get it for current opened terminal
4. Wait till the task is completed, refresh page and try to get processId again
   You can see that the request for processId is hanging, the promise is not resolved, not rejected, no errors can be caught.

Expected behavior

The promise should be resolved or rejected.

Runtime

• kubernetes (include output of kubectl version)
• Openshift (include output of oc version)
• minikube (minikube version: v1.0.0)
• minishift (include output of minishift version and oc version)
• docker-desktop + K8S (include output of docker version and kubectl version)
• other: (please specify)

Screenshots

Please see the video https://youtu.be/TzvCJhEZGpI

Installation method

• chectl
• che-operator
• minishift-addon
• I don't know

Environment

• my computer
  • Windows
  • Linux
  • macOS
• Cloud
  • Amazon
  • Azure
  • GCE
  • other (please specify)
• other: please specify