Instability of the /user-repo/scan REST API endpoint

[tisnik]

The REST API endpoint /user-repo/scan is unstable from time to time. It returns HTTP code 504 when HTTP 200/OK is expected.

Please see the following e2e tests results:

  Scenario: Check the Gemini API /api/v1/user-repo/scan response                                           # features/gemini.feature:92

    Given Gemini service is running                                                                        # features/steps/gemini.py:18

    And Gemini service git url is https://github.com/jitpack/maven-simple                                  # features/steps/gemini.py:24

    And Gemini service git sha is 9466faa13d65044c8430b418327df826f13ca07a                                 # features/steps/gemini.py:30

    When I post to Gemini API /api/v1/user-repo/scan                                                       # features/steps/gemini.py:80

INFO:requests.packages.urllib3.connectionpool:Starting new HTTPS connection (1): gemini.api.prod-preview.openshift.io

    Then I should get 401 status code                                                                      # features/steps/common.py:90

    And I should receive JSON response containing the error key                                            # features/steps/common.py:116

    And I should find the text "Authentication failed" stored under the key error                          # features/steps/common.py:129

    When I acquire the authorization token                                                                 # features/steps/authorization.py:36

    Then I should get the proper authorization token                                                       # features/steps/authorization.py:22

    When I post to Gemini API /api/v1/user-repo/scan with authorization token                              # features/steps/gemini.py:80

INFO:requests.packages.urllib3.connectionpool:Starting new HTTPS connection (1): gemini.api.prod-preview.openshift.io

    Then I should get 200 status code                                                                      # features/steps/common.py:90

      Assertion Failed: assert 504 == 200

       +  where 504 = <Response [504]>.status_code

       +    where <Response [504]> = <behave.runner.Context object at 0x7f4049aefe10>.response

      Captured logging:

      INFO:requests.packages.urllib3.connectionpool:Starting new HTTPS connection (1): gemini.api.prod-preview.openshift.io

      INFO:requests.packages.urllib3.connectionpool:Starting new HTTPS connection (1): gemini.api.prod-preview.openshift.io