Update _responses_instrumentor.py

[howieleung]

This script fails to run, and this PR is the fix.

import os
import logging

1) MUST be set before Azure SDK imports/client construction os.environ.setdefault("AZURE_EXPERIMENTAL_ENABLE_GENAI_TRACING", "true")

Tracing setup (required order)

from opentelemetry import trace
from opentelemetry.sdk.trace import TracerProvider from opentelemetry.sdk.trace.sampling import ALWAYS_OFF

from azure.core.settings import settings
from azure.core.tracing.ext.opentelemetry_span import OpenTelemetrySpan from azure.ai.projects.telemetry import AIProjectInstrumentor from azure.ai.projects import AIProjectClient
from azure.identity import DefaultAzureCredential

def main() -> None:
logging.basicConfig(level=logging.DEBUG)
logging.getLogger("azure").setLevel(logging.DEBUG)
logging.getLogger("openai").setLevel(logging.DEBUG)

endpoint = os.environ.get("FOUNDRY_PROJECT_ENDPOINT")
model = os.environ.get("FOUNDRY_MODEL_NAME")
if not endpoint:
    raise RuntimeError("FOUNDRY_PROJECT_ENDPOINT is not set")
if not model:
    raise RuntimeError("FOUNDRY_MODEL_NAME is not set")

# 2) Global tracer provider with ALWAYS_OFF -> NonRecordingSpan
trace.set_tracer_provider(TracerProvider(sampler=ALWAYS_OFF))

# 3) Use OpenTelemetry span implementation for azure-core tracing
settings.tracing_implementation = OpenTelemetrySpan

# 4) Explicitly activate AI Projects instrumentor exactly once
AIProjectInstrumentor().instrument()

credential = DefaultAzureCredential()
client = AIProjectClient(endpoint=endpoint, credential=credential)

# 5) Responses API call through OpenAI client
openai_client = client.get_openai_client()
response = openai_client.responses.create(
    model=model,
    input=[{"role": "user", "content": "hello from repro for #46544"}],
)

output_text = getattr(response, "output_text", None) or ""
print(f"response_id={response.id}")
print(f"output_text={output_text}")

if name == "main":
main()

Description

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• The pull request does not introduce [breaking changes]
• CHANGELOG is updated for new features, bug fixes or other significant changes.
• I have read the contribution guidelines.

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Testing Guidelines

• Pull request includes test coverage for the included changes.

[Copilot]

Pull request overview

This PR updates the Responses API telemetry instrumentor to avoid touching span internals when OpenTelemetry is using a non-recording span, preventing crashes during attribute-based message accumulation (e.g., when ALWAYS_OFF / NonRecordingSpan is in effect).

Changes:

• Add an is_recording() guard in _append_to_message_attribute before reading span.span_instance.attributes.
• Early-return when the underlying OpenTelemetry span is not recording to prevent AttributeError on NonRecordingSpan.