### Summary https://gitlab.zendesk.com/agent/tickets/92213 After upgrading from 10.2-ee to 10.5-ee, customer's regular backups reliably fail with the backtrace reported below. It does not fail on the same repo each time. Asking for detail from gitaly logs on the system. ### Relevant logs and/or screenshots ``` GRPC::Unavailable: 14:Connect Failed /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/grpc-1.8.3-x86_64-linux/src/ruby/lib/grpc/generic/active_call.rb:31:in `check_status' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/grpc-1.8.3-x86_64-linux/src/ruby/lib/grpc/generic/active_call.rb:180:in `attach_status_results_and_complete_call' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/grpc-1.8.3-x86_64-linux/src/ruby/lib/grpc/generic/active_call.rb:372:in `request_response' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/grpc-1.8.3-x86_64-linux/src/ruby/lib/grpc/generic/client_stub.rb:178:in `block in request_response' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/grpc-1.8.3-x86_64-linux/src/ruby/lib/grpc/generic/interceptors.rb:170:in `intercept!' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/grpc-1.8.3-x86_64-linux/src/ruby/lib/grpc/generic/client_stub.rb:177:in `request_response' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/grpc-1.8.3-x86_64-linux/src/ruby/lib/grpc/generic/service.rb:170:in `block (3 levels) in rpc_stub_class' /opt/gitlab/embedded/service/gitlab-rails/lib/gitlab/gitaly_client.rb:127:in `call' /opt/gitlab/embedded/service/gitlab-rails/lib/gitlab/gitaly_client/repository_service.rb:17:in `exists?' /opt/gitlab/embedded/service/gitlab-rails/lib/gitlab/git/repository.rb:142:in `block in exists?' /opt/gitlab/embedded/service/gitlab-rails/lib/gitlab/gitaly_client.rb:232:in `block (2 levels) in migrate' /opt/gitlab/embedded/service/gitlab-rails/lib/gitlab/gitaly_client.rb:270:in `allow_n_plus_1_calls' /opt/gitlab/embedded/service/gitlab-rails/lib/gitlab/gitaly_client.rb:227:in `block in migrate' /opt/gitlab/embedded/service/gitlab-rails/lib/gitlab/metrics/influx_db.rb:98:in `measure' /opt/gitlab/embedded/service/gitlab-rails/lib/gitlab/gitaly_client.rb:225:in `migrate' /opt/gitlab/embedded/service/gitlab-rails/lib/gitlab/git/repository.rb:140:in `exists?' /opt/gitlab/embedded/service/gitlab-rails/app/models/repository.rb:515:in `exists?' /opt/gitlab/embedded/service/gitlab-rails/app/models/repository.rb:78:in `block (2 levels) in cache_method' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activesupport-4.2.10/lib/active_support/cache.rb:299:in `block in fetch' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activesupport-4.2.10/lib/active_support/cache.rb:585:in `block in save_block_result_to_cache' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activesupport-4.2.10/lib/active_support/cache.rb:547:in `block in instrument' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activesupport-4.2.10/lib/active_support/notifications.rb:166:in `instrument' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activesupport-4.2.10/lib/active_support/cache.rb:547:in `instrument' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activesupport-4.2.10/lib/active_support/cache.rb:584:in `save_block_result_to_cache' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activesupport-4.2.10/lib/active_support/cache.rb:299:in `fetch' /opt/gitlab/embedded/service/gitlab-rails/lib/repository_cache.rb:20:in `fetch' /opt/gitlab/embedded/service/gitlab-rails/app/models/repository.rb:1024:in `cache_method_output' /opt/gitlab/embedded/service/gitlab-rails/app/models/repository.rb:77:in `block in cache_method' /opt/gitlab/embedded/service/gitlab-rails/app/models/repository.rb:520:in `empty?' /opt/gitlab/embedded/service/gitlab-rails/app/models/repository.rb:78:in `block (2 levels) in cache_method' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activesupport-4.2.10/lib/active_support/cache.rb:299:in `block in fetch' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activesupport-4.2.10/lib/active_support/cache.rb:585:in `block in save_block_result_to_cache' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activesupport-4.2.10/lib/active_support/cache.rb:547:in `block in instrument' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activesupport-4.2.10/lib/active_support/notifications.rb:166:in `instrument' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activesupport-4.2.10/lib/active_support/cache.rb:547:in `instrument' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activesupport-4.2.10/lib/active_support/cache.rb:584:in `save_block_result_to_cache' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activesupport-4.2.10/lib/active_support/cache.rb:299:in `fetch' /opt/gitlab/embedded/service/gitlab-rails/lib/repository_cache.rb:20:in `fetch' /opt/gitlab/embedded/service/gitlab-rails/app/models/repository.rb:1024:in `cache_method_output' /opt/gitlab/embedded/service/gitlab-rails/app/models/repository.rb:77:in `block in cache_method' /opt/gitlab/embedded/service/gitlab-rails/app/models/repository.rb:367:in `expire_emptiness_caches' /opt/gitlab/embedded/service/gitlab-rails/lib/backup/repository.rb:198:in `empty_repo?' /opt/gitlab/embedded/service/gitlab-rails/lib/backup/repository.rb:51:in `block in dump' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activerecord-4.2.10/lib/active_record/relation/batches.rb:51:in `block (2 levels) in find_each' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activerecord-4.2.10/lib/active_record/relation/batches.rb:51:in `each' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activerecord-4.2.10/lib/active_record/relation/batches.rb:51:in `block in find_each' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activerecord-4.2.10/lib/active_record/relation/batches.rb:124:in `find_in_batches' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activerecord-4.2.10/lib/active_record/relation/batches.rb:50:in `find_each' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/activerecord-4.2.10/lib/active_record/querying.rb:9:in `find_each' /opt/gitlab/embedded/service/gitlab-rails/lib/backup/repository.rb:9:in `dump' /opt/gitlab/embedded/service/gitlab-rails/lib/tasks/gitlab/backup.rake:82:in `block (4 levels) in <top (required)>' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/rake-12.3.0/lib/rake/task.rb:251:in `block in execute' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/rake-12.3.0/lib/rake/task.rb:251:in `each' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/rake-12.3.0/lib/rake/task.rb:251:in `execute' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/rake-12.3.0/lib/rake/task.rb:195:in `block in invoke_with_call_chain' /opt/gitlab/embedded/lib/ruby/2.3.0/monitor.rb:214:in `mon_synchronize' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/rake-12.3.0/lib/rake/task.rb:188:in `invoke_with_call_chain' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/rake-12.3.0/lib/rake/task.rb:181:in `invoke' /opt/gitlab/embedded/service/gitlab-rails/lib/tasks/gitlab/backup.rake:12:in `block (3 levels) in <top (required)>' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/rake-12.3.0/lib/rake/task.rb:251:in `block in execute' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/rake-12.3.0/lib/rake/task.rb:251:in `each' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/rake-12.3.0/lib/rake/task.rb:251:in `execute' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/rake-12.3.0/lib/rake/task.rb:195:in `block in invoke_with_call_chain' /opt/gitlab/embedded/lib/ruby/2.3.0/monitor.rb:214:in `mon_synchronize' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/rake-12.3.0/lib/rake/task.rb:188:in `invoke_with_call_chain' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/rake-12.3.0/lib/rake/task.rb:181:in `invoke' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/rake-12.3.0/lib/rake/application.rb:160:in `invoke_task' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/rake-12.3.0/lib/rake/application.rb:116:in `block (2 levels) in top_level' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/rake-12.3.0/lib/rake/application.rb:116:in `each' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/rake-12.3.0/lib/rake/application.rb:116:in `block in top_level' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/rake-12.3.0/lib/rake/application.rb:125:in `run_with_threads' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/rake-12.3.0/lib/rake/application.rb:110:in `top_level' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/rake-12.3.0/lib/rake/application.rb:83:in `block in run' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/rake-12.3.0/lib/rake/application.rb:186:in `standard_exception_handling' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/rake-12.3.0/lib/rake/application.rb:80:in `run' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/rake-12.3.0/exe/rake:27:in `<top (required)>' /opt/gitlab/embedded/bin/rake:23:in `load' /opt/gitlab/embedded/bin/rake:23:in `<top (required)>' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/bundler-1.13.7/lib/bundler/cli/exec.rb:74:in `load' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/bundler-1.13.7/lib/bundler/cli/exec.rb:74:in `kernel_load' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/bundler-1.13.7/lib/bundler/cli/exec.rb:27:in `run' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/bundler-1.13.7/lib/bundler/cli.rb:332:in `exec' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/bundler-1.13.7/lib/bundler/vendor/thor/lib/thor/command.rb:27:in `run' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/bundler-1.13.7/lib/bundler/vendor/thor/lib/thor/invocation.rb:126:in `invoke_command' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/bundler-1.13.7/lib/bundler/vendor/thor/lib/thor.rb:359:in `dispatch' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/bundler-1.13.7/lib/bundler/cli.rb:20:in `dispatch' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/bundler-1.13.7/lib/bundler/vendor/thor/lib/thor/base.rb:440:in `start' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/bundler-1.13.7/lib/bundler/cli.rb:11:in `start' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/bundler-1.13.7/exe/bundle:34:in `block in <top (required)>' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/bundler-1.13.7/lib/bundler/friendly_errors.rb:100:in `with_friendly_errors' /opt/gitlab/embedded/lib/ruby/gems/2.3.0/gems/bundler-1.13.7/exe/bundle:26:in `<top (required)>' /opt/gitlab/embedded/bin/bundle:23:in `load' /opt/gitlab/embedded/bin/bundle:23:in `<main>' Tasks: TOP => gitlab:backup:repo:create [DONE] ```