fix: OTLP exporter compression should be none by default. fixes #1798.

Author: patriciomacadden

exporter/otlp/lib/opentelemetry/exporter/otlp/exporter.rb

@@ -51,7 +51,7 @@ def initialize(endpoint: nil,
                        client_key_file: OpenTelemetry::Common::Utilities.config_opt('OTEL_EXPORTER_OTLP_TRACES_CLIENT_KEY', 'OTEL_EXPORTER_OTLP_CLIENT_KEY'),
                        ssl_verify_mode: Exporter.ssl_verify_mode,
                        headers: OpenTelemetry::Common::Utilities.config_opt('OTEL_EXPORTER_OTLP_TRACES_HEADERS', 'OTEL_EXPORTER_OTLP_HEADERS', default: {}),
-                       compression: OpenTelemetry::Common::Utilities.config_opt('OTEL_EXPORTER_OTLP_TRACES_COMPRESSION', 'OTEL_EXPORTER_OTLP_COMPRESSION', default: 'gzip'),
+                       compression: OpenTelemetry::Common::Utilities.config_opt('OTEL_EXPORTER_OTLP_TRACES_COMPRESSION', 'OTEL_EXPORTER_OTLP_COMPRESSION'),
                        timeout: OpenTelemetry::Common::Utilities.config_opt('OTEL_EXPORTER_OTLP_TRACES_TIMEOUT', 'OTEL_EXPORTER_OTLP_TIMEOUT', default: 10),
                        metrics_reporter: nil)
           @uri = prepare_endpoint(endpoint)

exporter/otlp/test/opentelemetry/exporter/otlp/exporter_test.rb

@@ -26,7 +26,7 @@
       _(exp.instance_variable_get(:@headers)).must_equal('User-Agent' => DEFAULT_USER_AGENT)
       _(exp.instance_variable_get(:@timeout)).must_equal 10.0
       _(exp.instance_variable_get(:@path)).must_equal '/v1/traces'
-      _(exp.instance_variable_get(:@compression)).must_equal 'gzip'
+      _(exp.instance_variable_get(:@compression)).must_be_nil
       http = exp.instance_variable_get(:@http)
       _(http.ca_file).must_be_nil
       _(http.cert).must_be_nil
@@ -385,7 +385,7 @@
   end
 
   describe '#export' do
-    let(:exporter) { OpenTelemetry::Exporter::OTLP::Exporter.new }
+    let(:exporter) { OpenTelemetry::Exporter::OTLP::Exporter.new compression: 'gzip' }
 
     before do
       OpenTelemetry.tracer_provider = OpenTelemetry::SDK::Trace::TracerProvider.new(resource: OpenTelemetry::SDK::Resources::Resource.telemetry_sdk)