Project deletion fails with "Can't modify frozen hash" when export data is present

Summary

I try to delete 2 repositories on my Gitlab CE instance. The repositories in /var/opt/gitlab/git-data/repositories are renamed (+deleted) but the project stays in the database. In the logs I find the entry: October 08, 2018 15:30: Deletion failed on [repository] with the following message: Can't modify frozen hash

Steps to reproduce

I am not sure how you can reproduce this issue.

Example Project

not possible

What is the current bug behavior?

Project is not deleted

What is the expected correct behavior?

Project is deleted

Relevant logs and/or screenshots

application.log: October 08, 2018 15:30: Deletion failed on [repository] with the following message: Can't modify frozen hash

Output of checks

Results of GitLab environment info

Expand for output related to GitLab environment info 
System information
System:         Debian 9.5
Current User:   git
Using RVM:      no
Ruby Version:   2.4.4p296
Gem Version:    2.7.6
Bundler Version:1.16.2
Rake Version:   12.3.1
Redis Version:  3.2.11
Git Version:    2.18.1
Sidekiq Version:5.1.3
Go Version:     unknown


GitLab information
Version:        11.3.4
Revision:       30f019d
Directory:      /opt/gitlab/embedded/service/gitlab-rails
DB Adapter:     postgresql
URL:            ***
HTTP Clone URL: ***
SSH Clone URL:  ***
Using LDAP:     yes
Using Omniauth: no


GitLab Shell
Version:        8.3.3
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 
GitLab Shell version >= 8.3.3 ? ... OK (8.3.3)
Repo base directory exists?
default... yes
Repo storage directories are symlinks?
default... no
Repo paths owned by git:root, or git:git?
default... yes
Repo paths access is drwxrws---?
default... yes
hooks directories in repos are links: ...
3/2 ... ok
6/3 ... ok
3/4 ... ok
3/5 ... ok
3/6 ... ok
3/7 ... ok
10/10 ... ok
10/11 ... ok
3/12 ... ok
12/13 ... ok
12/14 ... ok
12/15 ... ok
12/16 ... ok
12/17 ... ok
12/19 ... ok
12/20 ... ok
12/21 ... ok
12/22 ... ok
3/23 ... ok
14/24 ... ok
12/25 ... ok
12/26 ... repository is empty
12/27 ... ok
14/28 ... ok
12/29 ... ok
12/30 ... ok
3/31 ... ok
12/32 ... ok
20/33 ... ok
12/34 ... ok
12/35 ... repository is empty
12/36 ... ok
12/38 ... repository is empty
3/39 ... repository is empty
12/40 ... ok
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 Sidekiq ...


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


Checking Sidekiq ... Finished


Reply by email is disabled in config/gitlab.yml
Checking LDAP ...


Server: ldapmain
LDAP authentication... Success
LDAP users with access to your GitLab server (only showing the first 100 results)
-- trunkated --


Checking LDAP ... Finished


Checking GitLab ...


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: ...
3/2 ... yes
6/3 ... yes
3/4 ... yes
3/5 ... yes
3/6 ... yes
3/7 ... yes
10/10 ... yes
10/11 ... yes
3/12 ... yes
12/13 ... yes
12/14 ... yes
12/15 ... yes
12/16 ... yes
12/17 ... yes
12/19 ... yes
12/20 ... yes
12/21 ... yes
12/22 ... yes
3/23 ... yes
14/24 ... yes
12/25 ... yes
12/26 ... yes
12/27 ... yes
14/28 ... yes
12/29 ... yes
12/30 ... yes
3/31 ... yes
12/32 ... yes
20/33 ... yes
12/34 ... yes
12/35 ... yes
12/36 ... yes
12/38 ... yes
3/39 ... yes
12/40 ... yes
Redis version >= 2.8.0? ... yes
Ruby version >= 2.3.5 ? ... yes (2.4.4)
Git version >= 2.9.5 ? ... yes (2.18.1)
Git user has default SSH configuration? ... yes
Active users: ... 22


Checking GitLab ... Finished

Possible fixes

Edited by Stan Hu