## Summary the api search for snippets threw a `NoMethodError` https://new-sentry.gitlab.net/organizations/gitlab/issues/865386/?alert_rule_id=13&alert_type=issue&project=3&referrer=slack exception message ``` undefined method `<<' for nil:NilClass query_hash[:query][:bool][:filter] << { ^^ ``` ## Relevant logs and/or screenshots <details><summary>stack trace</summary> ``` [ee/lib/elastic/latest/snippet_class_proxy.rb:28:in `filter', ee/lib/elastic/latest/snippet_class_proxy.rb:8:in `block in elastic_search', ee/lib/elastic/latest/query_context.rb:25:in `name', ee/lib/elastic/latest/snippet_class_proxy.rb:8:in `elastic_search', ee/lib/elastic/multi_version_util.rb:76:in `elastic_search', ee/app/models/concerns/elastic/application_versioned_search.rb:41:in `elastic_search', ee/lib/gitlab/elastic/snippet_search_results.rb:26:in `snippet_titles', ee/lib/gitlab/elastic/snippet_search_results.rb:8:in `objects', app/services/search_service.rb:68:in `search_objects', lib/api/search.rb:74:in `block in search', /usr/lib/ruby/3.1.0/benchmark.rb:311:in `realtime', lib/api/search.rb:73:in `search', lib/api/search.rb:159:in `block (2 levels) in <class:Search>', grape (2.0.0) lib/grape/endpoint.rb:58:in `call', grape (2.0.0) lib/grape/endpoint.rb:58:in `block (2 levels) in generate_api_method', activesupport (7.0.8.1) lib/active_support/notifications.rb:208:in `instrument', grape (2.0.0) lib/grape/endpoint.rb:57:in `block in generate_api_method', grape (2.0.0) lib/grape/endpoint.rb:328:in `execute', grape (2.0.0) lib/grape/endpoint.rb:260:in `block in run', activesupport (7.0.8.1) lib/active_support/notifications.rb:208:in `instrument', grape (2.0.0) lib/grape/endpoint.rb:240:in `run', grape (2.0.0) lib/grape/endpoint.rb:316:in `block in build_stack', grape (2.0.0) lib/grape/middleware/base.rb:36:in `call!', grape (2.0.0) lib/grape/middleware/base.rb:29:in `call', grape (2.0.0) lib/grape/middleware/base.rb:36:in `call!', grape (2.0.0) lib/grape/middleware/base.rb:29:in `call', ee/lib/gitlab/middleware/ip_restrictor.rb:14:in `block in call', ee/lib/gitlab/ip_address_state.rb:10:in `with', ee/lib/gitlab/middleware/ip_restrictor.rb:13:in `call', grape (2.0.0) lib/grape/middleware/base.rb:36:in `call!', grape (2.0.0) lib/grape/middleware/base.rb:29:in `call', lib/api/api_guard.rb:219:in `call', grape (2.0.0) lib/grape/middleware/base.rb:36:in `call!', grape (2.0.0) lib/grape/middleware/base.rb:29:in `call', rack-oauth2 (1.21.3) lib/rack/oauth2/server/resource.rb:20:in `_call', rack-oauth2 (1.21.3) lib/rack/oauth2/server/resource/bearer.rb:8:in `_call', rack-oauth2 (1.21.3) lib/rack/oauth2/server/abstract/handler.rb:17:in `call', grape (2.0.0) lib/grape/middleware/error.rb:39:in `block in call!', grape (2.0.0) lib/grape/middleware/error.rb:38:in `catch', grape (2.0.0) lib/grape/middleware/error.rb:38:in `call!', grape (2.0.0) lib/grape/middleware/base.rb:29:in `call', grape_logging (1.8.4) lib/grape_logging/middleware/request_logger.rb:60:in `block in call!', grape_logging (1.8.4) lib/grape_logging/middleware/request_logger.rb:58:in `catch', grape_logging (1.8.4) lib/grape_logging/middleware/request_logger.rb:58:in `call!', grape (2.0.0) lib/grape/middleware/base.rb:29:in `call', rack (2.2.8.1) lib/rack/head.rb:12:in `call', grape (2.0.0) lib/grape/endpoint.rb:224:in `call!', grape (2.0.0) lib/grape/endpoint.rb:218:in `call', grape (2.0.0) lib/grape/router/route.rb:58:in `exec', grape (2.0.0) lib/grape/router.rb:120:in `process_route', grape (2.0.0) lib/grape/router.rb:74:in `block in identity', grape (2.0.0) lib/grape/router.rb:94:in `transaction', grape (2.0.0) lib/grape/router.rb:72:in `identity', grape (2.0.0) lib/grape/router.rb:56:in `block in call', grape (2.0.0) lib/grape/router.rb:136:in `with_optimization', grape (2.0.0) lib/grape/router.rb:55:in `call', grape (2.0.0) lib/grape/api/instance.rb:165:in `call', grape (2.0.0) lib/grape/api/instance.rb:70:in `call!', grape (2.0.0) lib/grape/api/instance.rb:65:in `call', actionpack (7.0.8.1) lib/action_dispatch/routing/mapper.rb:19:in `block in <class:Constraints>', actionpack (7.0.8.1) lib/action_dispatch/routing/mapper.rb:48:in `serve', actionpack (7.0.8.1) lib/action_dispatch/journey/router.rb:50:in `block in serve', actionpack (7.0.8.1) lib/action_dispatch/journey/router.rb:32:in `each', actionpack (7.0.8.1) lib/action_dispatch/journey/router.rb:32:in `serve', actionpack (7.0.8.1) lib/action_dispatch/routing/route_set.rb:852:in `call', gitlab-experiment (0.9.1) lib/gitlab/experiment/middleware.rb:19:in `call', omniauth (2.1.0) lib/omniauth/strategy.rb:202:in `call!', omniauth (2.1.0) lib/omniauth/strategy.rb:169:in `call', omniauth (2.1.0) lib/omniauth/strategy.rb:470:in `call_app!', ee/lib/omni_auth/strategies/group_saml.rb:41:in `other_phase', omniauth (2.1.0) lib/omniauth/strategy.rb:195:in `call!', omniauth (2.1.0) lib/omniauth/strategy.rb:169:in `call', omniauth (2.1.0) lib/omniauth/strategy.rb:202:in `call!', omniauth (2.1.0) lib/omniauth/strategy.rb:169:in `call', omniauth (2.1.0) lib/omniauth/strategy.rb:202:in `call!', omniauth (2.1.0) lib/omniauth/strategy.rb:169:in `call', omniauth (2.1.0) lib/omniauth/strategy.rb:202:in `call!', omniauth (2.1.0) lib/omniauth/strategy.rb:169:in `call', flipper (0.26.2) lib/flipper/middleware/memoizer.rb:72:in `memoized_call', flipper (0.26.2) lib/flipper/middleware/memoizer.rb:37:in `call', lib/gitlab/metrics/elasticsearch_rack_middleware.rb:16:in `call', lib/gitlab/middleware/sidekiq_shard_awareness_validation.rb:20:in `block in call', lib/gitlab/sidekiq_sharding/validator.rb:42:in `enabled', lib/gitlab/middleware/sidekiq_shard_awareness_validation.rb:20:in `call', lib/gitlab/middleware/memory_report.rb:13:in `call', lib/gitlab/middleware/speedscope.rb:13:in `call', lib/gitlab/database/load_balancing/rack_middleware.rb:23:in `call', lib/gitlab/middleware/rails_queue_duration.rb:33:in `call', lib/gitlab/etag_caching/middleware.rb:21:in `call', lib/gitlab/metrics/rack_middleware.rb:16:in `block in call', lib/gitlab/metrics/web_transaction.rb:46:in `run', lib/gitlab/metrics/rack_middleware.rb:16:in `call', lib/gitlab/middleware/go.rb:20:in `call', lib/gitlab/middleware/query_analyzer.rb:11:in `block in call', lib/gitlab/database/query_analyzer.rb:40:in `within', lib/gitlab/middleware/query_analyzer.rb:11:in `call', lib/gitlab/middleware/organizations/current.rb:20:in `call', batch-loader (2.0.5) lib/batch_loader/middleware.rb:11:in `call', rack-attack (6.7.0) lib/rack/attack.rb:103:in `call', apollo_upload_server (2.1.6) lib/apollo_upload_server/middleware.rb:19:in `call', lib/gitlab/middleware/multipart.rb:173:in `call', rack-attack (6.7.0) lib/rack/attack.rb:127:in `call', warden (1.2.9) lib/warden/manager.rb:36:in `block in call', warden (1.2.9) lib/warden/manager.rb:34:in `catch', warden (1.2.9) lib/warden/manager.rb:34:in `call', rack-cors (2.0.1) lib/rack/cors.rb:102:in `call', rack (2.2.8.1) lib/rack/tempfile_reaper.rb:15:in `call', rack (2.2.8.1) lib/rack/etag.rb:27:in `call', rack (2.2.8.1) lib/rack/conditional_get.rb:27:in `call', rack (2.2.8.1) lib/rack/head.rb:12:in `call', actionpack (7.0.8.1) lib/action_dispatch/http/permissions_policy.rb:38:in `call', actionpack (7.0.8.1) lib/action_dispatch/http/content_security_policy.rb:36:in `call', lib/gitlab/middleware/read_only/controller.rb:50:in `call', lib/gitlab/middleware/read_only.rb:18:in `call', lib/gitlab/middleware/unauthenticated_session_expiry.rb:18:in `call', rack (2.2.8.1) lib/rack/session/abstract/id.rb:266:in `context', rack (2.2.8.1) lib/rack/session/abstract/id.rb:260:in `call', actionpack (7.0.8.1) lib/action_dispatch/middleware/cookies.rb:704:in `call', lib/gitlab/middleware/same_site_cookies.rb:27:in `call', actionpack (7.0.8.1) lib/action_dispatch/middleware/callbacks.rb:27:in `block in call', activesupport (7.0.8.1) lib/active_support/callbacks.rb:99:in `run_callbacks', actionpack (7.0.8.1) lib/action_dispatch/middleware/callbacks.rb:26:in `call', sentry-rails (5.17.3) lib/sentry/rails/rescued_exception_interceptor.rb:12:in `call', actionpack (7.0.8.1) lib/action_dispatch/middleware/debug_exceptions.rb:28:in `call', lib/gitlab/middleware/path_traversal_check.rb:21:in `call', lib/gitlab/middleware/handle_malformed_strings.rb:21:in `call', sentry-ruby (5.17.3) lib/sentry/rack/capture_exceptions.rb:29:in `block (2 levels) in call', sentry-ruby (5.17.3) lib/sentry/hub.rb:251:in `with_session_tracking', sentry-ruby (5.17.3) lib/sentry-ruby.rb:403:in `with_session_tracking', sentry-ruby (5.17.3) lib/sentry/rack/capture_exceptions.rb:20:in `block in call', sentry-ruby (5.17.3) lib/sentry/hub.rb:59:in `with_scope', sentry-ruby (5.17.3) lib/sentry-ruby.rb:383:in `with_scope', sentry-ruby (5.17.3) lib/sentry/rack/capture_exceptions.rb:19:in `call', actionpack (7.0.8.1) lib/action_dispatch/middleware/show_exceptions.rb:29:in `call', lib/gitlab/middleware/basic_health_check.rb:25:in `call', lograge (0.11.2) lib/lograge/rails_ext/rack/logger.rb:15:in `call_app', railties (7.0.8.1) lib/rails/rack/logger.rb:25:in `block in call', activesupport (7.0.8.1) lib/active_support/tagged_logging.rb:99:in `block in tagged', activesupport (7.0.8.1) lib/active_support/tagged_logging.rb:37:in `tagged', activesupport (7.0.8.1) lib/active_support/tagged_logging.rb:99:in `tagged', railties (7.0.8.1) lib/rails/rack/logger.rb:25:in `call', actionpack (7.0.8.1) lib/action_dispatch/middleware/remote_ip.rb:93:in `call', lib/gitlab/middleware/handle_ip_spoof_attack_error.rb:25:in `call', lib/gitlab/middleware/request_context.rb:15:in `call', lib/gitlab/middleware/webhook_recursion_detection.rb:15:in `call', request_store (1.5.1) lib/request_store/middleware.rb:19:in `call', rack (2.2.8.1) lib/rack/method_override.rb:24:in `call', rack (2.2.8.1) lib/rack/runtime.rb:22:in `call', rack-timeout (0.6.3) lib/rack/timeout/core.rb:148:in `block in call', rack-timeout (0.6.3) lib/rack/timeout/support/timeout.rb:19:in `timeout', rack-timeout (0.6.3) lib/rack/timeout/core.rb:147:in `call', config/initializers/fix_local_cache_middleware.rb:11:in `call', lib/gitlab/middleware/compressed_json.rb:44:in `call', actionpack (7.0.8.1) lib/action_dispatch/middleware/executor.rb:14:in `call', lib/gitlab/middleware/rack_multipart_tempfile_factory.rb:19:in `call', rack (2.2.8.1) lib/rack/sendfile.rb:110:in `call', lib/gitlab/middleware/sidekiq_web_static.rb:20:in `call', lib/gitlab/metrics/requests_rack_middleware.rb:79:in `call', gitlab-labkit (0.36.0) lib/labkit/middleware/rack.rb:22:in `block in call', gitlab-labkit (0.36.0) lib/labkit/context.rb:35:in `with_context', gitlab-labkit (0.36.0) lib/labkit/middleware/rack.rb:21:in `call', actionpack (7.0.8.1) lib/action_dispatch/middleware/request_id.rb:26:in `call', actionpack (7.0.8.1) lib/action_dispatch/middleware/host_authorization.rb:131:in `call', railties (7.0.8.1) lib/rails/engine.rb:530:in `call', railties (7.0.8.1) lib/rails/railtie.rb:226:in `public_send', railties (7.0.8.1) lib/rails/railtie.rb:226:in `method_missing', lib/gitlab/middleware/release_env.rb:13:in `call', rack (2.2.8.1) lib/rack/urlmap.rb:74:in `block in call', rack (2.2.8.1) lib/rack/urlmap.rb:58:in `each', rack (2.2.8.1) lib/rack/urlmap.rb:58:in `call', puma (6.4.0) lib/puma/configuration.rb:272:in `call', puma (6.4.0) lib/puma/request.rb:100:in `block in handle_request', puma (6.4.0) lib/puma/thread_pool.rb:378:in `with_force_shutdown', puma (6.4.0) lib/puma/request.rb:99:in `handle_request', puma (6.4.0) lib/puma/server.rb:443:in `process_client', puma (6.4.0) lib/puma/server.rb:241:in `block in run', puma (6.4.0) lib/puma/thread_pool.rb:155:in `block in spawn_thread'] ``` </details> ## Possible fixes [`SnippetClassProxy`](ee/lib/elastic/latest/snippet_class_proxy.rb) is where the failure occured <!-- If you can, link to the line of code that might be responsible for the problem. --> <!-- Please add a label for the type of bug as per https://about.gitlab.com/handbook/engineering/metrics/#work-type-classification -->