diff --git a/files/pe_metrics.rb b/files/pe_metrics.rb
index fc0c1f3..65137a0 100644
--- a/files/pe_metrics.rb
+++ b/files/pe_metrics.rb
@@ -79,16 +79,16 @@ def post_endpoint(url, body)
       end
 
       def retrieve_additional_metrics(url, _metrics_type, metrics)
-        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
+        metrics_output = post_endpoint(url, metrics.to_json)
+
+        unless metrics_output.is_a?(Array)
+          STDERR.puts('ERROR request to %{url} returned data non-Array data of type %{class}: %{output}' %
+                      { url: url,
+                        class: metrics_output.class,
+                        output: metrics_output.to_s })
           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