Print out backtrace as well.

config/initializers/004-site_settings.rb

@@ -11,11 +11,11 @@ reload_settings = lambda {
       unless String === SiteSetting.push_api_secret_key && SiteSetting.push_api_secret_key.length == 32
         SiteSetting.push_api_secret_key = SecureRandom.hex
       end
-
     rescue ActiveRecord::StatementInvalid
       # This will happen when migrating a new database
     rescue => e
-      STDERR.puts "URGENT: #{e} Failed to initialize site #{RailsMultisite::ConnectionManagement.current_db}"
+      STDERR.puts "URGENT: Failed to initialize site #{RailsMultisite::ConnectionManagement.current_db}:"\
+        "#{e.message}\n#{e.backtrace.join("\n")}"
       # the show must go on, don't stop startup if multisite fails
     end
   end