Gitlab Pipeline logs unreachable on Web Interface

Summary

After CI job logs are stored in Openstack Swift (configuring artifacts on object storage), but if I look at the web interface after the ended pipeline I will get a 500 error on pipeline main page and "An error occurred while fetching the job log." on the build log.

Steps to reproduce

Configure gitlab artifacts upload on object storage using Openstack Swift as Object Storage provider, migrate all the artifacs, run a pipeline

What is the current bug behavior?

Error 500 on pipeline summary, and "An error occurred while fetching the job log." on stage log page.

What is the expected correct behavior?

The normal job logs and stage logs.

Relevant logs and/or screenshots

The configuration of Openstack Swift is the same of #57183 (closed) Reported for completition:

gitlab_rails['artifacts_enabled'] = true
# gitlab_rails['artifacts_path'] = "/mnt/storage/artifacts"
gitlab_rails['artifacts_object_store_enabled'] = true # EE only
gitlab_rails['artifacts_object_store_remote_directory'] = "gitlab-artifacts"
gitlab_rails['artifacts_object_store_connection'] = {
   'provider' => 'Openstack',
   'openstack_auth_url' => 'http://keystone:5000/v3/auth/tokens',
   'openstack_username' => 'admin',
   'openstack_api_key' =>  'password',
   'openstack_project_name' => 'tenant',
   'openstack_domain_id' =>    'domain'
}

Results of GitLab environment info

Expand for output related to GitLab environment info 
System information
System:
Proxy:          no
Current User:   git
Using RVM:      no
Ruby Version:   2.5.3p105
Gem Version:    2.7.6
Bundler Version:1.16.6
Rake Version:   12.3.2
Redis Version:  3.2.12
Git Version:    2.18.1
Sidekiq Version:5.2.3
Go Version:     unknown


GitLab information
Version:        11.7.5-ee
Revision:       ed04633
Directory:      /opt/gitlab/embedded/service/gitlab-rails
DB Adapter:     postgresql
DB Version:     9.6.11
URL:            https://externalurl [REDACTED]
HTTP Clone URL: https://externalurl [REDACTED]/some-group/some-project.git
SSH Clone URL:  git@externalurl [REDACTED]:some-group/some-project.git
Elasticsearch:  no
Geo:            no
Using LDAP:     no
Using Omniauth: yes
Omniauth Providers:


GitLab Shell
Version:        8.4.4
Repository storage paths:
  • default: /var/opt/gitlab/git-data/repositories Hooks: /opt/gitlab/embedded/service/gitlab-shell/hooks Git: /opt/gitlab/embedded/bin/git

Results of GitLab application Check

Expand for output related to the GitLab application check 
Checking GitLab subtasks ...


Checking GitLab Shell ...


GitLab Shell: ... GitLab Shell version >= 8.4.4 ? ... OK (8.4.4)
Running /opt/gitlab/embedded/service/gitlab-shell/bin/check
Check GitLab API access: OK
Redis available via internal API: OK


Access to /var/opt/gitlab/.ssh/authorized_keys: OK
gitlab-shell self-check successful


Checking GitLab Shell ... Finished


Checking Gitaly ...


Gitaly: ... default ... OK


Checking Gitaly ... Finished


Checking Sidekiq ...


Sidekiq: ... Running? ... yes
Number of Sidekiq processes ... 1


Checking Sidekiq ... Finished


Checking Incoming Email ...


Incoming Email: ... Reply by email is disabled in config/gitlab.yml


Checking Incoming Email ... Finished


Checking LDAP ...


LDAP: ... LDAP is disabled in config/gitlab.yml


Checking LDAP ... Finished


Checking GitLab App ...


Git configured correctly? ... yes
Database config exists? ... yes
All migrations up? ... yes
Database contains orphaned GroupMembers? ... no
GitLab config exists? ... yes
GitLab config up to date? ... yes
Log directory writable? ... yes
Tmp directory writable? ... yes
Uploads directory exists? ... yes
Uploads directory has correct permissions? ... yes
Uploads directory tmp has correct permissions? ... yes
Init script exists? ... skipped (omnibus-gitlab has no init script)
Init script up-to-date? ... skipped (omnibus-gitlab has no init script)
Projects have namespace: ...
7/1 ... yes
9/2 ... yes
9/3 ... yes
8/4 ... yes
12/5 ... yes
12/6 ... yes
9/7 ... yes
6/9 ... yes
6/10 ... yes
12/12 ... yes
2/13 ... yes
2/14 ... yes
19/15 ... yes
12/17 ... yes
14/18 ... yes
14/20 ... yes
15/21 ... yes
12/22 ... yes
14/23 ... yes
12/24 ... yes
12/25 ... yes
12/26 ... yes
14/27 ... yes
12/28 ... yes
12/30 ... yes
19/32 ... yes
20/33 ... yes
12/35 ... yes
3/36 ... yes
24/38 ... yes
24/39 ... yes
20/40 ... yes
12/41 ... yes
20/42 ... yes
12/43 ... yes
Redis version >= 2.8.0? ... yes
Ruby version >= 2.3.5 ? ... yes (2.5.3)
Git version >= 2.18.0 ? ... yes (2.18.1)
Git user has default SSH configuration? ... yes
Active users: ... 20
Elasticsearch version 5.6 - 6.x? ... skipped (elasticsearch is disabled)


Checking GitLab App ... Finished


Checking GitLab subtasks ... Finished

Possible fixes

(If you can, link to the line of code that might be responsible for the problem)