diff --git a/lib/solarwinds_apm/opentelemetry/otlp_processor.rb b/lib/solarwinds_apm/opentelemetry/otlp_processor.rb
index fad51386..cb16bb51 100644
--- a/lib/solarwinds_apm/opentelemetry/otlp_processor.rb
+++ b/lib/solarwinds_apm/opentelemetry/otlp_processor.rb
@@ -4,25 +4,6 @@
 #
 # Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
 
-# require 'opentelemetry/sdk'
-# require 'opentelemetry-metrics-sdk'
-# require 'opentelemetry/exporter/otlp'
-
-# OpenTelemetry::SDK.configure do |c|
-#  c.service_name = 'sinatra-sample-2'
-# end
-
-# otlp_metric_exporter = OpenTelemetry::SDK::Metrics::Export::OTLPMetricExporter.new # this is experimental exporter that sends metrics to otlp collector through http
-# OpenTelemetry.meter_provider.add_metric_reader(otlp_metric_exporter)
-
-# meter = OpenTelemetry.meter_provider.meter('test')
-
-# histogram = meter.create_histogram('histogram', unit: 'smidgen', description: 'a small amount of something')
-# histogram.record(5, attributes: { 'foo' => 'bar' })
-
-# otlp_metric_exporter.pull
-
-
 module SolarWindsAPM
   module OpenTelemetry
     # reference: OpenTelemetry::SDK::Trace::SpanProcessor
@@ -89,7 +70,6 @@ def on_finish(span)
         meter_attrs = {'sw.service_name' => ENV['OTEL_SERVICE_NAME'], 'sw.nonce' => rand(2**64) >> 1}
 
         span_time  = calculate_span_time(start_time: span.start_timestamp, end_time: span.end_timestamp)
-        domain     = nil
         has_error  = error?(span)
         meter_attrs['sw.is_error'] = has_error ? 'true' : 'false'
         
@@ -98,7 +78,6 @@ def on_finish(span)
         if span_http?(span)
           status_code    = get_http_status_code(span)
           request_method = span.attributes[HTTP_METHOD]
-          url_tran       = span.attributes[HTTP_URL]
 
           meter_attrs.merge!({'http.status_code' => status_code, 'http.method' => request_method, 'sw.transaction' => trans_name})
         else
@@ -112,9 +91,7 @@ def on_finish(span)
         @txn_manager.delete_root_context_h(span.context.hex_trace_id)
         @exporter&.export([span.to_span_data]) if span.context.trace_flags.sampled?
 
-        ::OpenTelemetry.meter_provider.metric_readers.each do |metric_reader|
-          metric_reader.pull # same as export
-        end
+        ::OpenTelemetry.meter_provider.metric_readers.each(&:pull)
       rescue StandardError => e
         SolarWindsAPM.logger.info {"[#{self.class}/#{__method__}] can't flush span to exporter; processor on_finish error: #{e.message}"}
         ::OpenTelemetry::SDK::Trace::Export::FAILURE