I have an API using the responses streaming API. I am using it to route requests to specific tools, however after upgrading to 4.0+ these calls are failing with: java.util.concurrent.CompletionException: com.openai.errors.OpenAIInvalidDataException: name is not set

It looks like the issue was introduced here on line 318 of the ResponseFunctionCallArgumentsDoneEvent: d58091b#diff-d211a6e0ed129a3b2af84098071931cd23c4f078d175146d241dd15bf1cb9731R318

Now it is validating that name is set in this event, however OpenAI is not setting it in this use case.

You can see with this CURL, the streamed back event does not have name set.

curl -i -X POST \ -H "Authorization:Bearer <INSERT CLIENT ID>" \ -H "Content-Type:application/json" \ -d \ '{ "input": [ { "content": "What is the current situation in Minnesota?", "role": "user", "type": "message" } ], "instructions": "You act as the central router, deciding which specialized agent should handle the user\''s request based on the request itself and the conversational context.", "model": "gpt-4.1-mini", "store": false, "temperature": 0.2, "tool_choice": "auto", "tools": [ { "name": "transfer_to_location_intel_agent", "parameters": { "type": "object", "properties": { }, "additionalProperties": false, "required": [ ] }, "strict": true, "type": "function", "description": "Handoff to the location_intel_agent agent to handle the request." } ], "top_p": 0.1, "stream": true }' \ 'https://api.openai.com/v1/responses'

And here is the event:

event: response.function_call_arguments.done data: {"type":"response.function_call_arguments.done","arguments":"{}","item_id":"fc_071179986c0b4d5f016977cf066b3481939993c816cc22819c","output_index":0,"sequence_number":4}