Import of Gitlab export fails with merge_requests error
Summary
GitLab v8.13.1 attempting to import a project fails with the below error.
Steps to reproduce
Unknown
Relevant logs and/or screenshots
Import/Export error raised on
/opt/gitlab/embedded/service/gitlab-rails/lib/gitlab/import_export/project_tree_restorer.rb:20:in `rescue in restore': Failed to replace merge_requests because one or more of the new records could not be saved.
["
/opt/gitlab/embedded/service/gem/ruby/2.3.0/gems/activerecord-4.2.7.1/lib/active_record/associations/collection_association.rb:542:in `replace_records'", "
/opt/gitlab/embedded/service/gem/ruby/2.3.0/gems/activerecord-4.2.7.1/lib/active_record/associations/collection_association.rb:373:in `block in replace'", "
/opt/gitlab/embedded/service/gem/ruby/2.3.0/gems/activerecord-4.2.7.1/lib/active_record/associations/collection_association.rb:183:in `block in transaction'", "
/opt/gitlab/embedded/service/gem/ruby/2.3.0/gems/activerecord-4.2.7.1/lib/active_record/connection_adapters/abstract/database_statements.rb:213:in `block in transaction'", "
/opt/gitlab/embedded/service/gem/ruby/2.3.0/gems/activerecord-4.2.7.1/lib/active_record/connection_adapters/abstract/transaction.rb:184:in `within_new_transaction'", "
/opt/gitlab/embedded/service/gem/ruby/2.3.0/gems/activerecord-4.2.7.1/lib/active_record/connection_adapters/abstract/database_statements.rb:213:in `transaction'", "
/opt/gitlab/embedded/service/gem/ruby/2.3.0/gems/activerecord-4.2.7.1/lib/active_record/transactions.rb:220:in `transaction'", "
/opt/gitlab/embedded/service/gem/ruby/2.3.0/gems/activerecord-4.2.7.1/lib/active_record/associations/collection_association.rb:182:in `transaction'", "
/opt/gitlab/embedded/service/gem/ruby/2.3.0/gems/activerecord-4.2.7.1/lib/active_record/associations/collection_association.rb:373:in `replace'", "
/opt/gitlab/embedded/service/gem/ruby/2.3.0/gems/activerecord-4.2.7.1/lib/active_record/associations/collection_association.rb:47:in `writer'", "
/opt/gitlab/embedded/service/gem/ruby/2.3.0/gems/activerecord-4.2.7.1/lib/active_record/associations/builder/association.rb:123:in `merge_requests='", "
/opt/gitlab/embedded/service/gem/ruby/2.3.0/gems/activerecord-4.2.7.1/lib/active_record/persistence.rb:240:in `update_attribute'", "
/opt/gitlab/embedded/service/gitlab-rails/app/models/project.rb:1275:in `append_or_update_attribute'", "
/opt/gitlab/embedded/service/gitlab-rails/lib/gitlab/import_export/project_tree_restorer.rb:50:in `block in create_relations'", "
/opt/gitlab/embedded/service/gitlab-rails/lib/gitlab/import_export/project_tree_restorer.rb:43:in `each'", "
/opt/gitlab/embedded/service/gitlab-rails/lib/gitlab/import_export/project_tree_restorer.rb:43:in `create_relations'", "
/opt/gitlab/embedded/service/gitlab-rails/lib/gitlab/import_export/project_tree_restorer.rb:17:in `block in restore'", "
/opt/gitlab/embedded/service/gem/ruby/2.3.0/gems/activerecord-4.2.7.1/lib/active_record/no_touching.rb:29:in `apply_to'", "
/opt/gitlab/embedded/service/gem/ruby/2.3.0/gems/activerecord-4.2.7.1/lib/active_record/no_touching.rb:22:in `no_touching'", "
/opt/gitlab/embedded/service/gitlab-rails/lib/gitlab/import_export/project_tree_restorer.rb:16:in `restore'", "
/opt/gitlab/embedded/service/gitlab-rails/lib/gitlab/import_export/importer.rb:12:in `each'", "
/opt/gitlab/embedded/service/gitlab-rails/lib/gitlab/import_export/importer.rb:12:in `all?'", "
/opt/gitlab/embedded/service/gitlab-rails/lib/gitlab/import_export/importer.rb:12:in `execute'", "
/opt/gitlab/embedded/service/gitlab-rails/app/services/projects/import_service.rb:61:in `import_data'", "
/opt/gitlab/embedded/service/gitlab-rails/app/services/projects/import_service.rb:19:in `execute'", "
/opt/gitlab/embedded/service/gitlab-rails/app/workers/repository_import_worker.rb:18:in `perform'", "
/opt/gitlab/embedded/service/gem/ruby/2.3.0/gems/sidekiq-4.2.1/lib/sidekiq/processor.rb:155:in `execute_job'", "
/opt/gitlab/embedded/service/gem/ruby/2.3.0/gems/sidekiq-4.2.1/lib/sidekiq/processor.rb:136:in `block (3 levels) in process'", "
/opt/gitlab/embedded/service/gem/ruby/2.3.0/gems/sidekiq-4.2.1/lib/sidekiq/middleware/chain.rb:128:in `block in invoke'", "
/opt/gitlab/embedded/service/gitlab-rails/lib/gitlab/sidekiq_middleware/request_store_middleware.rb:6:in `call'", "
/opt/gitlab/embedded/service/gem/ruby/2.3.0/gems/sidekiq-4.2.1/lib/sidekiq/middleware/chain.rb:130:in `block in invoke'", "
/opt/gitlab/embedded/service/gitlab-rails/lib/gitlab/sidekiq_middleware/memory_killer.rb:17:in `call'", "
/opt/gitlab/embedded/service/gem/ruby/2.3.0/gems/sidekiq-4.2.1/lib/sidekiq/middleware/chain.rb:130:in `block in invoke'", "
/opt/gitlab/embedded/service/gem/ruby/2.3.0/gems/sidekiq-4.2.1/lib/sidekiq/middleware/server/active_record.rb:6:in `call'", "
/opt/gitlab/embedded/service/gem/ruby/2.3.0/gems/sidekiq-4.2.1/lib/sidekiq/middleware/chain.rb:130:in `block in invoke'", "
/opt/gitlab/embedded/service/gem/ruby/2.3.0/gems/sidekiq-4.2.1/lib/sidekiq/middleware/server/retry_jobs.rb:74:in `call'", "
/opt/gitlab/embedded/service/gem/ruby/2.3.0/gems/sidekiq-4.2.1/lib/sidekiq/middleware/chain.rb:130:in `block in invoke'", "
/opt/gitlab/embedded/service/gem/ruby/2.3.0/gems/sidekiq-4.2.1/lib/sidekiq/middleware/server/logging.rb:11:in `block in call'", "
/opt/gitlab/embedded/service/gem/ruby/2.3.0/gems/sidekiq-4.2.1/lib/sidekiq/logging.rb:32:in `with_context'", "
/opt/gitlab/embedded/service/gem/ruby/2.3.0/gems/sidekiq-4.2.1/lib/sidekiq/middleware/server/logging.rb:7:in `call'", "
/opt/gitlab/embedded/service/gem/ruby/2.3.0/gems/sidekiq-4.2.1/lib/sidekiq/middleware/chain.rb:130:in `block in invoke'", "
/opt/gitlab/embedded/service/gem/ruby/2.3.0/gems/sidekiq-4.2.1/lib/sidekiq/middleware/chain.rb:133:in `invoke'", "
/opt/gitlab/embedded/service/gem/ruby/2.3.0/gems/sidekiq-4.2.1/lib/sidekiq/processor.rb:131:in `block (2 levels) in process'", "
/opt/gitlab/embedded/service/gem/ruby/2.3.0/gems/sidekiq-4.2.1/lib/sidekiq/processor.rb:171:in `stats'", "
/opt/gitlab/embedded/service/gem/ruby/2.3.0/gems/sidekiq-4.2.1/lib/sidekiq/processor.rb:130:in `block in process'", "
/opt/gitlab/embedded/service/gem/ruby/2.3.0/gems/sidekiq-4.2.1/lib/sidekiq.rb:35:in `block in <module:Sidekiq>'", "
/opt/gitlab/embedded/service/gem/ruby/2.3.0/gems/sidekiq-4.2.1/lib/sidekiq/processor.rb:122:in `process'", "
/opt/gitlab/embedded/service/gem/ruby/2.3.0/gems/sidekiq-4.2.1/lib/sidekiq/processor.rb:81:in `process_one'", "
/opt/gitlab/embedded/service/gem/ruby/2.3.0/gems/sidekiq-4.2.1/lib/sidekiq/processor.rb:69:in `run'", "
/opt/gitlab/embedded/service/gem/ruby/2.3.0/gems/sidekiq-4.2.1/lib/sidekiq/util.rb:17:in `watchdog'", "
/opt/gitlab/embedded/service/gem/ruby/2.3.0/gems/sidekiq-4.2.1/lib/sidekiq/util.rb:25:in `block in safe_thread'"]See ZD ticket https://gitlab.zendesk.com/agent/tickets/46300 for more details and the sample project.json.