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… GC) AnthropicStream and AnthropicAsyncStream ended the LLM span only on stream exhaustion (_complete_instrumentation), so leaving a with-block early, using the messages.stream() helper and breaking out, or calling close() left the span open forever - the model call, its tokens and cost silently missing from the trace. Add close()/__exit__ (sync) and close()/__aexit__ (async, awaiting the wrapped coroutine close) that run the idempotent _ensure_cleanup() first, plus a best-effort __del__ fallback. WrappedMessageStreamManager now keeps the stream proxy it creates and runs cleanup in __exit__/__aexit__ before delegating to the SDK manager. 9 mock-based regression tests (no network): close/exit/del end the span, idempotent close, no double-end after full consumption, manager exits. Fixes traceloop#4536
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Included review availability: This review used your included allowance. Your plan provides up to 8 included reviews per hour; 7 remain after this review. 📝 WalkthroughWalkthroughSynchronous and asynchronous Anthropic stream proxies now clean up instrumentation on early exit. Wrapped message-stream managers retain the proxies and clean them up before delegating context exit. Regression tests cover stream closure, context exit, garbage collection, and manager delegation. ChangesAnthropic stream cleanup
Priority: ➖ Normal Estimated code review effort: 3 (Moderate) | ~20 minutes Change: Bug fix · Severity of issue fixed: Medium Merge Risk: ⚪ Minimal · up to Anthropic streams now finish their spans on early exit, including exceptional context exits. No remaining issue in the supplied evidence prevents merging after normal checks. Security Architecture ReviewSecurity architecture risk: 🔵 Low · up to Early-exit cleanup preserves the wrapped stream’s responsibility for releasing resources. The main security consideration is that exceptional exits now record application error text, which can contain sensitive data even when prompt and response capture is disabled. Actual exposure depends on application exceptions and telemetry sanitization. Retained concerns
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Review comments at
@packages/opentelemetry-instrumentation-anthropic/opentelemetry/instrumentation/anthropic/streaming.py:
- Around line 226-231: Update the shared _ensure_cleanup helper to accept an
optional exception and, when present, record it on the span, set ERROR status,
and end the span idempotently; retain _complete_instrumentation for normal
cleanup. Pass exc_val to this helper from both stream proxies and both
message-stream manager exits, preserving their existing wrapped __exit__ and
__aexit__ delegation.
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packages/opentelemetry-instrumentation-anthropic/opentelemetry/instrumentation/anthropic/streaming.pypackages/opentelemetry-instrumentation-anthropic/tests/test_stream_early_exit.py
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_ensure_cleanup now accepts the in-flight exception; on exceptional __exit__/__aexit__ the exception is recorded on the span, the exception counter is bumped, and the span ends with ERROR status instead of OK. Normal exits keep the existing OK path. All four exit points (both stream proxies, both message-stream managers) pass exc_val through.
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Re: CodeRabbit's review comment on propagating context exceptions to stream cleanup (
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@rupak-eng from my perspective this can be merged: the suite passes at 7f99923, and 12 tests fail with the old streaming.py.
non-blocking: a sync stream raising inside with now counts the exception twice, in __next__ and __exit__. Main counts it once. #4644 sets _instrumentation_completed in __next__ for #4643, which also fixes this.
# packages/opentelemetry-instrumentation-anthropic, uv sync --frozen --all-groups
# CPython 3.10.21, anthropic 0.86.0 from uv.lock, pytest 8.4.2, ANTHROPIC_* unset
$ env -u ANTHROPIC_API_KEY -u ANTHROPIC_BASE_URL -u ANTHROPIC_AUTH_TOKEN .venv/bin/python -m pytest -q -p no:sugar tests # main 8d9c93f
270 passed
$ env -u ANTHROPIC_API_KEY -u ANTHROPIC_BASE_URL -u ANTHROPIC_AUTH_TOKEN .venv/bin/python -m pytest -q -p no:sugar tests # 7f99923
283 passed
$ env -u ANTHROPIC_API_KEY -u ANTHROPIC_BASE_URL -u ANTHROPIC_AUTH_TOKEN .venv/bin/python -m pytest -q -p no:sugar tests # 7f99923, streaming.py from the base be49830
12 failed, 271 passed
$ env -u ANTHROPIC_API_KEY -u ANTHROPIC_BASE_URL -u ANTHROPIC_AUTH_TOKEN .venv/bin/python -m pytest -q -p no:sugar tests # 7f99923 plus the test below
FAILED tests/test_stream_early_exit.py::test_sync_stream_raising_inside_with_counts_once[with]
FAILED tests/test_stream_early_exit.py::test_sync_stream_raising_inside_with_counts_once[messages.stream]
E AssertionError: assert 2 == 1 # counter.add.call_count
2 failed, 283 passed
$ git merge-tree --write-tree 7f99923 620bb1c # #4644 head, no conflict
57873d561dd6e30168e887d914d14421515d9dcc
$ env -u ANTHROPIC_API_KEY -u ANTHROPIC_BASE_URL -u ANTHROPIC_AUTH_TOKEN .venv/bin/python -m pytest -q -p no:sugar tests # that tree plus the test below
287 passed
The test
--- a/packages/opentelemetry-instrumentation-anthropic/tests/test_stream_early_exit.py
+++ b/packages/opentelemetry-instrumentation-anthropic/tests/test_stream_early_exit.py
@@ -320,0 +321,40 @@
+
+
+@pytest.mark.parametrize("entry", ["with", "messages.stream"])
+def test_sync_stream_raising_inside_with_counts_once(tracer_and_exporter, entry):
+ """A dropped connection after the first event: ERROR, counted once."""
+ tracer, exporter = tracer_and_exporter
+ counter = MagicMock()
+ wrapped = MagicMock()
+ wrapped.__next__ = MagicMock(
+ side_effect=[_ping_event(), ConnectionError("dropped")]
+ )
+ wrapped.__exit__ = MagicMock(return_value=False)
+ span = tracer.start_span("anthropic.chat")
+
+ with pytest.raises(ConnectionError):
+ if entry == "messages.stream":
+ manager_mock = MagicMock()
+ manager_mock.__enter__ = MagicMock(return_value=wrapped)
+ manager_mock.__exit__ = MagicMock(return_value=False)
+ with WrappedMessageStreamManager(
+ manager_mock, span, instance=None, start_time=time.time(),
+ token_histogram=None, choice_counter=None,
+ duration_histogram=None, exception_counter=counter,
+ event_logger=None, kwargs={},
+ ) as stream:
+ for _ in stream:
+ pass
+ else:
+ with AnthropicStream(
+ span, wrapped, instance=None, start_time=time.time(),
+ exception_counter=counter,
+ ) as stream:
+ for _ in stream:
+ pass
+
+ spans = exporter.get_finished_spans()
+ assert len(spans) == 1
+ assert spans[0].status.status_code == StatusCode.ERROR
+ assert counter.add.call_count == 1Should I open this test as a follow-up PR once both are in?
Fixes #4536.
What changed
AnthropicStream: newclose()and__exit__run the idempotent_ensure_cleanup()before delegating to the wrapped SDK stream; new__del__best-effort fallback.AnthropicAsyncStream: newclose()(awaits the wrapped coroutineclose, calls a sync one inline, mirroring the OpenAIChatStreamdispatch) and__aexit__with the same cleanup-first semantics;__del__fallback.WrappedMessageStreamManager/WrappedAsyncMessageStreamManager: keep the stream proxy created in__enter__/__aenter__and run its cleanup in__exit__/__aexit__before delegating to the SDK manager, sowith client.messages.stream(...)early exit ends the span.Testing
tests/test_stream_early_exit.py: 9 mock-based regression tests (no network) — 8 fail on unpatched code, all pass with the fix.test_semconv_compliance.py119/119 pass;ruff checkclean on both files.Summary by CodeRabbit