Reindex model on elasticsearch bad request exception.

app/controllers/admin/searches_controller.rb

@@ -5,5 +5,14 @@ class Admin::SearchesController < AdminController
   # Search models for query.
   def search
     @results = Search.for(current_mailbox, params[:q])
+  rescue Elasticsearch::Transport::Transport::BadRequest
+    if @already_retried
+      raise
+    else
+      logger.warn 'Reindexing models, because we cought an bad request exception in elasticsearch transport.'
+      [Alias, Domain, Mailbox].map(&:reindex)
+      @already_retried = true
+      retry
+    end
   end
 end