Nightly single user Che is broken

[AndrienkoAleksandr]

Describe the bug

Che version

• latest
• nightly
• other: please specify

Steps to reproduce

1. Install Eclipse Che in the minikube:

 chectl server:deploy -n eclipse-che -p minikube --installer operator

2. Patch che-cluster to enable single user:

kubectl patch checluster/eclipse-che -n eclipse-che --type=merge -p '{"spec":{"server": {"customCheProperties": {"CHE_MULTIUSER": "false"}}}}'

3. Open user dashboard. See error:

Expected behavior

Runtime

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

Screenshots

Installation method

• chectl
  • provide a full command that was used to deploy Eclipse Che (including the output)
  • provide an output of chectl version command
• OperatorHub
• I don't know

Environment

• my computer
  • Windows
  • Linux
  • macOS
• Cloud
  • Amazon
  • Azure
  • GCE
  • other (please specify)
• Dev Sandbox (workspaces.openshift.com)
• other: please specify

Eclipse Che Logs

Additional context

[manojsaxenatda]

I was just about to open the same issue when trying in single user mode. I have tried 7.28.0 and 7.28.2. I have used helm to deploy. (https://github.com/eclipse/che/tree/master/deploy/kubernetes/helm/che/)
All workloads and services are up.

Based on the information from this page: https://www.eclipse.org/che/docs/che-7/installation-guide/configuring-storage-types/
I looked at che pod and the following are defined in che.properties:
che.workspace.storage.available_types=persistent,ephemeral,async
che.workspace.storage.preferred_type=persistent

kubectl version
Client Version: version.Info{Major:"1", Minor:"19", GitVersion:"v1.19.2", GitCommit:"f5743093fd1c663cb0cbc89748f730662345d44d", GitTreeState:"clean", BuildDate:"2020-09-16T13:41:02Z", GoVersion:"go1.15", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"19", GitVersion:"v1.19.2", GitCommit:"f5743093fd1c663cb0cbc89748f730662345d44d", GitTreeState:"clean", BuildDate:"2020-09-16T13:32:58Z", GoVersion:"go1.15", Compiler:"gc", Platform:"linux/amd64"}

[sleshchenko]

According to #19434 (comment)
the fix should be backported to 7.28.x

Update: the referenced comment is not related to the fix made for this issue.

[garyyang85]

Encounter this issue on 7.31.2, installed by operator on openshift. But currently only reproduced on Firefox browser. Chrome works good.