ddtrace 4.15.7

on Python PyPI

Upgrade Notes

• google-adk: With google-adk 2.9.0 and later, tool call spans use the resource name FunctionTool._call_tool_async (one leading underscore) instead of FunctionTool.__call_tool_async, following a rename in google-adk itself. Update any monitor or dashboard that matches on the old resource name.

Bug Fixes

• aiohttp: Fixes an issue where tracing HTTP server requests produces repeated callback errors when keep-alive connections close.

• google-adk: Fixes an issue where applications using google-adk 2.9.0 and later fail to start when tracing is enabled, or start normally but report no tool call or code execution spans. Tool calls and code execution are now traced on all supported google-adk versions.

• LLM Observability: Fixes an issue where concurrently running OpenAI Agent workflows within the same traced operation can be missing from LLM Observability or report incorrect input/output.

• vllm: Fixes an issue with vLLM >= 0.20.0 where the integration raised AttributeError: 'EngineCoreOutput' object has no attribute 'num_cached_tokens'. This error stopped the vLLM output loop and caused all requests tofail. The integration now also handles tracing errors without interrupting vLLM.

• LLM Observability: Fixes an issue where LLMJudge with the anthropic provider raised TypeError: Object of type method is not JSON serializable when the model returned a thinking block before the text block (for example, Claude models with adaptive thinking). The judge now reads the first text block in the response.

• LLM Observability: Fixes a regression introduced in 4.15.2 where LLM Observability spans that were still open when an ASGI request finished (FastAPI, Starlette, Django ASGI) were force-finished at request teardown. Agents and background tasks that intentionally outlive the HTTP request had their spans truncated, and work started afterwards was detached into separate root traces instead of staying nested. Abandoned streams are still reclaimed by TracedStream/TracedAsyncStream finalization and the stream context managers.