Merge branch 'es_suppress_not_found_error' into 'master'

[Elastic] Suppress ActiveRecord::RecordNotFound error in ElasticIndexWorker

Fixes https://gitlab.com/gitlab-com/infrastructure/issues/233

See merge request !577

CHANGELOG-EE

@@ -9,6 +9,7 @@ v 8.10.0 (unreleased)
   - Make Elasticsearch indexer run as an async task
   - Fix of removing wiki data from index when project is deleted
   - Ticket-based Kerberos authentication (SPNEGO)
+  - [Elastic] Suppress ActiveRecord::RecordNotFound error in ElasticIndexWorker
 
 v.8.9.7 (unreleased)
   - Fix error in admin dashboard when Geo is enabled and current node is nil.

app/workers/elastic_indexer_worker.rb

@@ -21,7 +21,7 @@ class ElasticIndexerWorker
 
       clear_project_indexes(record_id) if klass == Project
     end
-  rescue Elasticsearch::Transport::Transport::Errors::NotFound
+  rescue Elasticsearch::Transport::Transport::Errors::NotFound, ActiveRecord::RecordNotFound
     true # Less work to do!
   end