che-theia fails with `redhat/java8/latest` plugin

Describe the bug

It’s impossible to properly start a workspace if there is redhat/java8/latest plugin in the devfile. The bug is reproducible only if build che-theia, based on eclipse-theia/theia/master.

The problem does not depend on the infrastructure and the installation method.

Che version

latest

Steps to reproduce

• Build che-theia image

1. build che-theia:next image, using eclipse-che/che-theia/main and eclipse-theia/theia/master
2. create a minimal devfile, use built che-theia and latest redhat/java8 plugin.
3. start a workspace, open browser console, check errors

You will not be able to see My Workspace and other views, that contributed by plugins. The most of plugins at this point are not properly started.

• Do not build anything, just run prepared devfile

apiVersion: 1.0.0
metadata:
  name: minimal-workspace
projects:
  - name: web-java-spring-petclinic
    source:
      location: 'https://github.com/che-samples/java-spring-petclinic'
      type: git
components:
  - type: cheEditor
    alias: che-theia
    reference: https://gist.githubusercontent.com/vitaliy-guliy/261c8e37493c20d6504701c537a146e0/raw/24606999f923183f992f34d6617f570dd7e0858c/editor.meta.yaml
  - id: redhat/java8/latest
    type: chePlugin

Expected behavior

Plugin system must be working.

Runtime

other (please specify in additional context)

Screenshots

There are few unexpected errors, which could be reason of failure

There is a similar error on che-theia backend

Installation method

other (please specify in additional context)

Environment

Dev Sandbox (workspaces.openshift.com), other (please specify in additional context)

Eclipse Che Logs

No response

Additional context

No response

[RomanNikitenko]

I investigated the problem and found that:

• according to the recent changes in upstream(https://github.com/eclipse-theia/theia/pull/9538), theia tries to read a package.json file for a vscode extension at starting the IDE
• the path looks like /tmp/vscode-unpacked/redhat.java.latest.toxohserdj.java-0.75.0-60.vsix/extension/package.json for the java extension, for example
• but /tmp/vscode-unpacked/ doesn’t exist in theia-ide container, it’s present in vscode-java container instead

That’s why che-theia fails with a vscode plugin… I’m looking for a good solution for that problem…

[azatsarynnyy]

It should be already fixed by https://github.com/eclipse-che/che-theia/pull/1213