add default service name

config/initializers/sidekiq.rb

@@ -36,6 +36,7 @@ def not_past_scheduled_time?(current_time)
   # On Heroku this configuration is overridden and Sidekiq will point at the redis
   # instance given by the ENV variable REDIS_PROVIDER
   config.redis = { url: sidekiq_url }
+  config.options[:service_name] = ENV['SERVICE_NAME'] || 'default_service_name'
 
   config.server_middleware do |chain|
     chain.add Sidekiq::HoneycombMiddleware