BREAKING: Remove http.status_code attribute from the http.server.acti…

…ve_requests metric (#3366)

CHANGELOG.md

@@ -71,6 +71,9 @@ release.
   ([#3347](https://github.com/open-telemetry/opentelemetry-specification/pull/3347))
 - Change `db.statement` to only be collected if there is sanitization.
   ([#3127](https://github.com/open-telemetry/opentelemetry-specification/pull/3127))
+- BREAKING: Remove `http.status_code` attribute from the
+  `http.server.active_requests` metric.
+  ([#3366](https://github.com/open-telemetry/opentelemetry-specification/pull/3366))
 
 ### Compatibility
 

semantic_conventions/metrics/http.yaml

@@ -21,7 +21,6 @@ groups:
     unit: "{request}"
     attributes:
       - ref: http.method
-      - ref: http.status_code
       - ref: http.scheme
       - ref: net.host.name
         requirement_level: required

specification/metrics/semantic_conventions/http-metrics.md

@@ -90,7 +90,6 @@ This metric is optional.
 |---|---|---|---|---|
 | `http.method` | string | HTTP request method. | `GET`; `POST`; `HEAD` | Required |
 | `http.scheme` | string | The URI scheme identifying the used protocol. | `http`; `https` | Required |
-| `http.status_code` | int | [HTTP response status code](https://tools.ietf.org/html/rfc7231#section-6). | `200` | Conditionally Required: If and only if one was received/sent. |
 | [`net.host.name`](../../trace/semantic_conventions/span-general.md) | string | Name of the local HTTP server that received the request. [1] | `localhost` | Required |
 | [`net.host.port`](../../trace/semantic_conventions/span-general.md) | int | Port of the local HTTP server that received the request. [2] | `8080` | Conditionally Required: [3] |