Gitlab CE 503 Error "GRPC::Unavailable (14:Connect Failed)"

503 Error occurs when viewing projects page

Started GET "/" for 1.36.129.7 at 2019-11-12 07:02:49 +0000
Processing by RootController#index as HTML

GRPC::Unavailable (14:Connect Failed):
  lib/gitlab/gitaly_client.rb:154:in `call'
  lib/gitlab/gitaly_client/server_service.rb:14:in `info'
  lib/gitlab/gitaly_client.rb:402:in `filesystem_id'
  lib/gitlab/gitaly_client.rb:392:in `can_use_disk?'
  lib/gitlab/git/rugged_impl/use_rugged.rb:11:in `use_rugged?'
  lib/gitlab/git/rugged_impl/commit.rb:38:in `find_commit'
  lib/gitlab/git/commit.rb:66:in `find'
  app/models/repository.rb:1120:in `find_commit'
  app/models/repository.rb:114:in `commit'
  app/models/project.rb:745:in `commit'
  lib/gitlab/cache/ci/project_pipeline_status.rb:118:in `block in commit'
  lib/gitlab/utils/strong_memoize.rb:30:in `strong_memoize'
  lib/gitlab/cache/ci/project_pipeline_status.rb:117:in `commit'
  lib/gitlab/cache/ci/project_pipeline_status.rb:52:in `load_status'
  lib/gitlab/cache/ci/project_pipeline_status.rb:23:in `block in load_in_batch_for_projects'
  lib/gitlab/cache/ci/project_pipeline_status.rb:21:in `load_in_batch_for_projects'
  app/helpers/projects_helper.rb:201:in `load_pipeline_status'
  app/views/shared/projects/_list.html.haml:37:in `_app_views_shared_projects__list_html_haml__1424444413511553746_47407927459700'
  app/views/dashboard/projects/_projects.html.haml:1:in `_app_views_dashboard_projects__projects_html_haml___2756413511381465155_47407927285320'
  app/views/dashboard/projects/index.html.haml:15:in `_app_views_dashboard_projects_index_html_haml__1475817171406947139_47407917265260'
  app/controllers/application_controller.rb:125:in `render'
  app/controllers/dashboard/projects_controller.rb:60:in `block in render_projects'
  lib/gitlab/gitaly_client.rb:277:in `allow_n_plus_1_calls'
  app/controllers/dashboard/projects_controller.rb:59:in `render_projects'
  app/controllers/dashboard/projects_controller.rb:19:in `block (2 levels) in index'
  app/controllers/dashboard/projects_controller.rb:17:in `index'
  app/controllers/root_controller.rb:20:in `block in index'
  lib/gitlab/gitaly_client.rb:277:in `allow_n_plus_1_calls'
  app/controllers/root_controller.rb:19:in `index'
  lib/gitlab/session.rb:11:in `with_session'
  app/controllers/application_controller.rb:463:in `set_session_storage'
  lib/gitlab/i18n.rb:55:in `with_locale'
  lib/gitlab/i18n.rb:61:in `with_user_locale'
  app/controllers/application_controller.rb:457:in `set_locale'
  lib/gitlab/request_profiler/middleware.rb:17:in `call'
  lib/gitlab/middleware/go.rb:20:in `call'
  lib/gitlab/etag_caching/middleware.rb:13:in `call'
  lib/gitlab/middleware/correlation_id.rb:16:in `block in call'
  lib/gitlab/middleware/correlation_id.rb:15:in `call'
  lib/gitlab/middleware/multipart.rb:117:in `call'
  lib/gitlab/middleware/read_only/controller.rb:48:in `call'
  lib/gitlab/middleware/read_only.rb:18:in `call'
  lib/gitlab/middleware/basic_health_check.rb:25:in `call'
  lib/gitlab/request_context.rb:32:in `call'
  lib/gitlab/metrics/requests_rack_middleware.rb:49:in `call'
  lib/gitlab/middleware/release_env.rb:12:in `call'

Completed 503 Service Unavailable in 160ms (Views: 1.6ms | ActiveRecord: 15.3ms | Elasticsearch: 0.0ms)