The gerrit code review plugin seems to ignore context path when accessing the checks API of a gerrit server and always use a path of /

Steps to reproduce:

Install a gerrit server with a context path other than / (ex: /myproject/gerrit/)

Create a multibranch pipeline that checks out a project using the server address (e.g. https://myserver.mydomain/myproject/gerrit/a/myrepository)

Result:

Jenkins shows the following error:

Unable to query for pending checks: com.google.gerrit.extensions.restapi.RestApiException: Failed to list pending checks:

Logs from the reverse proxy indicate that jenkins tries to access an url starting with https://myserver.mydomain/a/plugins/checks/checks.pending/?query= instead of https://myserver.mydomain/myproject/gerrit/a/plugins/checks/checks.pending/?query=

This is a problem especially when serving multiple gerrit servers with a single reverse proxy since there is no easy workaround in that case.