[QA] Downloading file preview can sometimes fail with 500 error

[saw-jan]

During the tests run, downloading preview steps sometimes fail with 500 server error.

Example:

Scenario Outline: download previews of files inside sub-folders                                                           # /drone/src/tests/acceptance/features/coreApiWebdavPreviews/previews.feature:75
    Given using <dav-path-version> DAV path                                                                                 # FeatureContext::usingOldOrNewDavPath()
    And user "Alice" has created folder "subfolder"                                                                         # FeatureContext::userHasCreatedFolder()
    And user "Alice" has uploaded file "filesForUpload/example.gif" to "subfolder/example.gif"                              # FeatureContext::userHasUploadedAFileTo()
    When user "Alice" downloads the preview of "subfolder/example.gif" with width "32" and height "32" using the WebDAV API # FeatureContext::downloadPreviewOfFiles()
    Then the HTTP status code should be "200"                                                                               # FeatureContext::thenTheHTTPStatusCodeShouldBe()
    And the downloaded image should be "32" pixels wide and "32" pixels high                                                # FeatureContext::imageDimensionsShouldBe()

    Examples:
      | dav-path-version |
      | old              |
      | new              |
        Failed step: Then the HTTP status code should be "200"
        HTTP status code 500 is not the expected value 200
        Failed asserting that 500 matches expected '200'.

Failed step:

When user "Alice" downloads the preview of "<file>" with width "32" and height "32" using the WebDAV API
And as user "Alice" the preview of "/FOLDER/lorem.txt" with width "32" and height "32" should have been changed

NOTE: If you see similar failure then please report to the frequency below

[UPDATED REQUEST LOG]

And as user "Alice" the preview of "/FOLDER/lorem.txt" with width "32" and height "32" should have been changed
_______________________________________________________________________

==> REQUEST
GET /remote.php/dav/files/Alice/FOLDER/lorem.txt
X-Request-ID: coreApiWebdavPreviews/previews.feature:296-285

<== RESPONSE
500 Internal Server Error
X-Request-Id: coreApiWebdavPreviews/previews.feature:296-285
<== RES BODY
<?xml version="1.0" encoding="UTF-8"?>
<d:error xmlns:d="DAV" xmlns:s="http://sabredav.org/ns">
    <s:exception></s:exception>
    <s:message>
        {&#34;id&#34;:&#34;com.owncloud.api.thumbnails&#34;,&#34;code&#34;:425,&#34;detail&#34;:&#34;File Processing&#34;,&#34;status&#34;:&#34;Too Early&#34;}
    </s:message>
</d:error>

[saw-jan]

Frequency:

• https://drone.owncloud.com/owncloud/ocis/26765/72/6
• https://drone.owncloud.com/owncloud/ocis/26768/72/6
• https://drone.owncloud.com/owncloud/ocis/26772/72/5
• https://drone.owncloud.com/owncloud/ocis/26931/69/5
• https://drone.owncloud.com/owncloud/ocis/27158/72/5
• https://drone.owncloud.com/owncloud/ocis/27160/73/6
• https://drone.owncloud.com/owncloud/ocis/27166/73/6
• https://drone.owncloud.com/owncloud/ocis/27258/70/6
• https://drone.owncloud.com/owncloud/ocis/27285/73/6
• https://drone.owncloud.com/owncloud/ocis/27284/73/5
• https://drone.owncloud.com/owncloud/ocis/27258/70/6
• https://drone.owncloud.com/owncloud/ocis/27344/73/5
• https://drone.owncloud.com/owncloud/ocis/27334/73/5
• https://drone.owncloud.com/owncloud/ocis/27254/73/6
• https://drone.owncloud.com/owncloud/ocis/27451/70/5
• https://drone.owncloud.com/owncloud/ocis/27664/73/5

[SagarGi]

This issue can be reproduced locally:
The server error logs looks something like this:

{"level":"error","service":"webdav","error":"{\"id\":\"com.owncloud.api.thumbnails\",\"code\":425,\"detail\":\"FileProcessing\",\"status\":\"Too Early\"}","time":"2023-10-16T12:49:39+05:45","message":"could not get thumbnail"}

[saw-jan]

This issue can be reproduced locally: The server error logs looks something like this:

{"level":"error","service":"webdav","error":"{\"id\":\"com.owncloud.api.thumbnails\",\"code\":425,\"detail\":\"FileProcessing\",\"status\":\"Too Early\"}","time":"2023-10-16T12:49:39+05:45","message":"could not get thumbnail"}

That looks like we can wait until 425 is resolved in the tests (which we have done for other requests if I remember correctly)

[SagarGi]

This issue can be reproduced locally: The server error logs looks something like this:

{"level":"error","service":"webdav","error":"{\"id\":\"com.owncloud.api.thumbnails\",\"code\":425,\"detail\":\"FileProcessing\",\"status\":\"Too Early\"}","time":"2023-10-16T12:49:39+05:45","message":"could not get thumbnail"}

That looks like we can wait until 425 is resolved in the tests (which we have done for other requests if I remember correctly)

We have retry implemented in the test code for status code 425 but here the server it self gives status 500. Its the server log that gives code 425.

[saw-jan]

Then need an issue for that. Try to reproduce with POSTPROCESSING_DELAY, it would be easier

[SagarGi]

Issue has been created for this failure in ocis #7502