Possible fix

app/lib/resources/service.rb

@@ -28,10 +28,12 @@ module Resources
     def self.step1(delivery_info, body) # Returns params or nil
       Preprocessor.from_amqp(delivery_info, body)
     rescue Mutations::ValidationException => q
-      x = delivery_info.to_hash.slice(:consumer_tag,
-                                      :redelivered,
-                                      :exchange,
-                                      :routing_key).merge(body: body)
+      # AUTHORS NOTE: Some of the Bunny data structures have circular
+      #               references that will cause the JSON serializer
+      #               to crash. the safe_attrs var reduces the risk of
+      #               stack overflow during serialization.
+      safe_attrs = [:consumer_tag, :redelivered, :exchange, :routing_key]
+      x = delivery_info.to_hash.slice(*safe_attrs).merge(body: body)
       Rollbar.error(q, x)
       raw_chan = delivery_info&.routing_key&.split(".") || []
       id       = raw_chan[INDEX_OF_USERNAME]&.gsub("device_", "")&.to_i