Update otel.exporter.otlp.protocol default value (open-telemetry#6444)

xiangtianyu · May 11, 2024 · 9543a34 · 9543a34
1 parent 1049897
commit 9543a34
Showing 1 changed file with 6 additions and 4 deletions.
diff --git a/sdk-extensions/autoconfigure/README.md b/sdk-extensions/autoconfigure/README.md
@@ -122,17 +122,19 @@ The [OpenTelemetry Protocol (OTLP)](https://github.com/open-telemetry/openteleme
 | otel.exporter.otlp.traces.timeout                        | OTEL_EXPORTER_OTLP_TRACES_TIMEOUT                        | The maximum waiting time, in milliseconds, allowed to send each OTLP trace batch. Default is `10000`.                                                                                                                                                                                                                                                                                                                                                         |
 | otel.exporter.otlp.metrics.timeout                       | OTEL_EXPORTER_OTLP_METRICS_TIMEOUT                       | The maximum waiting time, in milliseconds, allowed to send each OTLP metric batch. Default is `10000`.                                                                                                                                                                                                                                                                                                                                                        |
 | otel.exporter.otlp.logs.timeout                          | OTEL_EXPORTER_OTLP_LOGS_TIMEOUT                          | The maximum waiting time, in milliseconds, allowed to send each OTLP log batch. Default is `10000`.                                                                                                                                                                                                                                                                                                                                                           |
-| otel.exporter.otlp.protocol                              | OTEL_EXPORTER_OTLP_PROTOCOL                              | The transport protocol to use on OTLP trace, metric, and log requests. Options include `grpc` and `http/protobuf`. Default is `grpc`.                                                                                                                                                                                                                                                                                                                         |
-| otel.exporter.otlp.traces.protocol                       | OTEL_EXPORTER_OTLP_TRACES_PROTOCOL                       | The transport protocol to use on OTLP trace requests. Options include `grpc` and `http/protobuf`. Default is `grpc`.                                                                                                                                                                                                                                                                                                                                          |
-| otel.exporter.otlp.metrics.protocol                      | OTEL_EXPORTER_OTLP_METRICS_PROTOCOL                      | The transport protocol to use on OTLP metric requests. Options include `grpc` and `http/protobuf`. Default is `grpc`.                                                                                                                                                                                                                                                                                                                                         |
-| otel.exporter.otlp.logs.protocol                         | OTEL_EXPORTER_OTLP_LOGS_PROTOCOL                         | The transport protocol to use on OTLP log requests. Options include `grpc` and `http/protobuf`. Default is `grpc`.                                                                                                                                                                                                                                                                                                                                            |
+| otel.exporter.otlp.protocol                              | OTEL_EXPORTER_OTLP_PROTOCOL                              | The transport protocol to use on OTLP trace, metric, and log requests. Options include `grpc` and `http/protobuf`. Default is `grpc`.**[1]**                                                                                                                                                                                                                                                                                                                  |
+| otel.exporter.otlp.traces.protocol                       | OTEL_EXPORTER_OTLP_TRACES_PROTOCOL                       | The transport protocol to use on OTLP trace requests. Options include `grpc` and `http/protobuf`. Default is `grpc`.**[1]**                                                                                                                                                                                                                                                                                                                                   |
+| otel.exporter.otlp.metrics.protocol                      | OTEL_EXPORTER_OTLP_METRICS_PROTOCOL                      | The transport protocol to use on OTLP metric requests. Options include `grpc` and `http/protobuf`. Default is `grpc`.**[1]**                                                                                                                                                                                                                                                                                                                                  |
+| otel.exporter.otlp.logs.protocol                         | OTEL_EXPORTER_OTLP_LOGS_PROTOCOL                         | The transport protocol to use on OTLP log requests. Options include `grpc` and `http/protobuf`. Default is `grpc`.**[1]**                                                                                                                                                                                                                                                                                                                                     |
 | otel.exporter.otlp.metrics.temporality.preference        | OTEL_EXPORTER_OTLP_METRICS_TEMPORALITY_PREFERENCE        | The preferred output aggregation temporality. Options include `DELTA`, `LOWMEMORY`, and `CUMULATIVE`. If `CUMULATIVE`, all instruments will have cumulative temporality. If `DELTA`, counter (sync and async) and histograms will be delta, up down counters (sync and async) will be cumulative. If `LOWMEMORY`, sync counter and histograms will be delta, async counter and up down counters (sync and async) will be cumulative. Default is `CUMULATIVE`. |
 | otel.exporter.otlp.metrics.default.histogram.aggregation | OTEL_EXPORTER_OTLP_METRICS_DEFAULT_HISTOGRAM_AGGREGATION | The preferred default histogram aggregation. Options include `BASE2_EXPONENTIAL_BUCKET_HISTOGRAM` and `EXPLICIT_BUCKET_HISTOGRAM`. Default is `EXPLICIT_BUCKET_HISTOGRAM`.                                                                                                                                                                                                                                                                                    |
 | otel.experimental.exporter.otlp.retry.enabled            | OTEL_EXPERIMENTAL_EXPORTER_OTLP_RETRY_ENABLED            | If `true`, enable [experimental retry support](#otlp-exporter-retry). Default is `false`.                                                                                                                                                                                                                                                                                                                                                                     |
 
 To configure the service name for the OTLP exporter, add the `service.name` key
 to the OpenTelemetry Resource ([see below](#opentelemetry-resource)), e.g. `OTEL_RESOURCE_ATTRIBUTES=service.name=myservice`.
 
+**[1]**: NOTE: OpenTelemetry Java Agent 2.x uses `http/protobuf` by default.
+
 ##### OTLP exporter retry
 
 [OTLP](https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/protocol/otlp.md#otlpgrpc-response) requires that [transient](https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/protocol/exporter.md#retry) errors be handled with a retry strategy. When retry is enabled, retryable gRPC status codes will be retried using an exponential backoff with jitter algorithm as described in the [gRPC Retry Design](https://github.com/grpc/proposal/blob/master/A6-client-retries.md#exponential-backoff).