GDK: Gitlab::GitalyClient::TooManyInvocationsError on GET /api/v4/groups

Summary

GET /api/v4/groups/:id returns 500 with Gitlab::GitalyClient::TooManyInvocationsError in the GDK logs.

NOTE: This is only on local installation with GDK. Works fine in production and in CI (using nightly omnibus docker images). The bug doesn't occur after disabling request limits.

Steps to reproduce

  1. On GDK, create a group with a subgroup and 14 projects
  2. curl -s --header "PRIVATE-TOKEN: xxxxxxxxxxxxxxxxxxxx" http://localhost:3000/api/v4/groups/:id

What is the current bug behavior?

The request returns {"message":"500 Internal Server Error"} and the logs appear as below.

What is the expected correct behavior?

The request returns status 200 and the group data.

Relevant logs and/or screenshots

11:16:21 rails-web.1              | caught error of type Gitlab::GitalyClient::TooManyInvocationsError in after callback inside Grape::Middleware::Formatter : GitalyClient#call called 36 times from single request. Potential n+1?
11:16:21 rails-web.1              | The following call site called into Gitaly 9 times:
11:16:21 rails-web.1              | lib/gitlab/gitaly_client.rb:129:in `call'
11:16:21 rails-web.1              | lib/gitlab/gitaly_client/commit_service.rb:425:in `call_find_commit'
11:16:21 rails-web.1              | lib/gitlab/gitaly_client/commit_service.rb:254:in `find_commit'
11:16:21 rails-web.1              | lib/gitlab/git/commit.rb:66:in `block in find'
11:16:21 rails-web.1              | lib/gitlab/git/repository.rb:893:in `wrapped_gitaly_errors'
11:16:21 rails-web.1              | lib/gitlab/git/commit.rb:65:in `find'
11:16:21 rails-web.1              | app/models/repository.rb:1023:in `find_commit'
11:16:21 rails-web.1              | app/models/repository.rb:105:in `commit'
11:16:21 rails-web.1              | app/models/repository.rb:639:in `head_commit'
11:16:21 rails-web.1              | app/models/repository.rb:650:in `tree'
11:16:21 rails-web.1              | app/models/repository.rb:574:in `readme'
11:16:21 rails-web.1              | app/models/project.rb:978:in `readme_url'
11:16:21 rails-web.1              | lib/gitlab/query_limiting/middleware.rb:17:in `block in call'
11:16:21 rails-web.1              | lib/gitlab/query_limiting/transaction.rb:37:in `run'
11:16:21 rails-web.1              | lib/gitlab/query_limiting/middleware.rb:16:in `call'
11:16:21 rails-web.1              | lib/gitlab/webpack/dev_server_middleware.rb:25:in `perform_request'

Output of checks

Results of GitLab environment info

Expand for output related to GitLab environment info 
System information
System:		Ubuntu 18.04
Current User:	mark
Using RVM:	no
Ruby Version:	2.4.4p296
Gem Version:	2.6.14.1
Bundler Version:1.16.4
Rake Version:	12.3.1
Redis Version:	4.0.9
Git Version:	2.18.0
Sidekiq Version:5.2.1
Go Version:	go1.11 linux/amd64


GitLab information
Version:	11.3.0-pre
Revision:	1111396dd18
Directory:	/home/mark/dev/gitlab/gitlab-ce
DB Adapter:	postgresql
URL:		http://192.168.0.91:3000
HTTP Clone URL:	http://192.168.0.91:3000/some-group/some-project.git
SSH Clone URL:	ssh://mark@192.168.0.91:2222/some-group/some-project.git
Using LDAP:	no
Using Omniauth:	no


GitLab Shell
Version:	8.3.3
Repository storage paths:
default: 	/home/mark/dev/gdk-ce/repositories
Hooks:		/home/mark/dev/gdk-ce/gitlab-shell/hooks
Git:		/usr/bin/git