getting 500 on accessing project settings integrations

Summary

getting 500 on accessing project settings integrations.

This also makes creating new issues fail, as well as moving issued between projects.

Steps to reproduce

In the web interface navigate to project setting, integrations

What is the current bug behavior?

I get "500 - Whoops, something went wrong on our end."

What is the expected correct behavior?

Get the integrations page.

Relevant logs and/or screenshots

production.log

Started GET "/gitlab/hexa8/virtus/settings/integrations" for 172.17.0.1 at 2017-07-04 12:47:36 +0000
Processing by Projects::Settings::IntegrationsController#show as HTML
Parameters: {"namespace_id"=>"hexa8", "project_id"=>"virtus"}
Started POST "/gitlab/api/v4/jobs/request" for 172.17.0.1 at 2017-07-04 12:47:36 +0000
Completed 500 Internal Server Error in 51ms (ActiveRecord: 2.2ms)
NoMethodError (undefined method `pipeline_events=' for #<ProjectHook:0x007fcbf3711828>):
app/controllers/projects/settings/integrations_controller.rb:11:in `show'
lib/gitlab/i18n.rb:39:in `with_locale'
lib/gitlab/i18n.rb:45:in `with_user_locale'
app/controllers/application_controller.rb:303:in `set_locale'
lib/gitlab/performance_bar/peek_performance_bar_with_rack_body.rb:16:in `call'
lib/gitlab/middleware/multipart.rb:93:in `call'
lib/gitlab/request_profiler/middleware.rb:14:in `call'
lib/gitlab/middleware/go.rb:16:in `call'
lib/gitlab/etag_caching/middleware.rb:11:in `call'
lib/gitlab/request_context.rb:18:in `call'

Output of checks

using docker image gitlab/gitlab-ce d416bb03bac8

Results of GitLab environment info

Expand for output related to GitLab environment info 
System information
System:		
Current User:	git
Using RVM:	no
Ruby Version:	2.3.3p222
Gem Version:	2.6.6
Bundler Version:1.13.7
Rake Version:	10.5.0
Redis Version:	3.2.5
Git Version:	2.13.0
Sidekiq Version:5.0.0
Go Version:	unknown

GitLab information
Version:	9.3.4
Revision:	3888c01
Directory:	/opt/gitlab/embedded/service/gitlab-rails
DB Adapter:	postgresql
URL:		https://hexa8.de/gitlab
HTTP Clone URL:	https://hexa8.de/gitlab/some-group/some-project.git
SSH Clone URL:	ssh://git@hexa8.de:222/some-group/some-project.git
Using LDAP:	no
Using Omniauth:	no


GitLab Shell
Version:	5.1.1
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 Shell ...

GitLab Shell version >= 5.1.1 ? ... OK (5.1.1)
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: ...
3/23 ... ok
3/24 ... ok
3/25 ... ok
3/26 ... ok
3/28 ... ok
3/29 ... ok
3/30 ... ok
3/31 ... ok
21/35 ... ok
26/36 ... ok
32/42 ... ok
Running /opt/gitlab/embedded/service/gitlab-shell/bin/check
Check GitLab API access: OK
Access to /var/opt/gitlab/.ssh/authorized_keys: OK
Send ping to redis server: OK
gitlab-shell self-check successful


Checking GitLab Shell ... Finished


Checking Sidekiq ...


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


Checking Sidekiq ... Finished


Checking Reply by email ...


IMAP server credentials are correct? ... yes
Init.d configured correctly? ... skipped (omnibus-gitlab has no init script)
MailRoom running? ... can't check because of previous errors


Checking Reply by email ... Finished


Checking LDAP ...


LDAP is disabled in config/gitlab.yml


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: ...
3/23 ... yes
3/24 ... yes
3/25 ... yes
3/26 ... yes
3/28 ... yes
3/29 ... yes
3/30 ... yes
3/31 ... yes
21/35 ... yes
26/36 ... yes
32/42 ... yes
Redis version >= 2.8.0? ... yes
Ruby version >= 2.3.3 ? ... yes (2.3.3)
Git version >= 2.7.3 ? ... yes (2.13.0)
Active users: ... 16


Checking GitLab ... Finished