Un-awaited (background) LLM call triggers invalid 'dotted_order' during LangSmith trace #9077
Description
Checked other resources
- This is a bug, not a usage question. For questions, please use the LangChain Forum (https://forum.langchain.com/).
- I added a very descriptive title to this issue.
- I searched the LangChain.js documentation with the integrated search.
- I used the GitHub search to find a similar question and didn't find it.
- I am sure that this is a bug in LangChain.js rather than my code.
- The bug is not resolved by updating to the latest stable version of LangChain (or the specific integration package).
Example Code
https://github.com/yuku-sandbox/langsmith-dotted-order-repro
Error Message and Stack Trace (if applicable)
Failed to Failed to send multipart request. Received status [400]: Bad Request. Message: {"error":"Bad request: invalid 'dotted_order': dotted_order must contain at least two parts for child runs for run_id:0c84e859-506a-44f3-9424-5e5fd10e0c75 trace_id:0c84e859-506a-44f3-9424-5e5fd10e0c75 dotted_order:20250930T162253554001Z0c84e859-506a-44f3-9424-5e5fd10e0c75 parent_run_id:a54cdf92-665b-41fd-b328-ac6291b94a7d"}
Context: trace=0c84e859-506a-44f3-9424-5e5fd10e0c75,id=0c84e859-506a-44f3-9424-5e5fd10e0c75
Description
When an LLM is called without await inside LangGraph nodes, the parent run may have already disappeared from the memory by the time the LLM call is actually executed, which leads the invalid format of dotted_order.
Related to #8607
System Info
$ bun pm ls | grep langchain
[0.32ms] ".env"
├── @langchain/[email protected]
├── @langchain/[email protected]
├── @langchain/[email protected]
├── [email protected]
$ node -v
v22.14.0