(SUP-5232) Added error handling to JSON conversion of metrics

Author: Rory-Johnston

files/pe_metrics.rb

@@ -79,7 +79,16 @@ def post_endpoint(url, body)
       end
 
       def retrieve_additional_metrics(url, _metrics_type, metrics)
-        metrics_output = post_endpoint(url, metrics.to_json)
+        begin
+          json_data = metrics.to_json
+        rescue StandardError => e
+          STDERR.puts "Failed to convert metrics to JSON."
+          STDERR.puts "Error: '#{e.message}'"
+          STDERR.puts e.backtrace
+          return []
+        end
+
+        metrics_output = post_endpoint(url, json_data)
         return [] if metrics_output.empty?
 
         # For a status other than 200 or 404, add the HTTP code to the error array