---
url: >-
  https://adk.nht.io/api/@nhtio/adk/batteries/llm/openai_responses/exceptions/variables/E_OPENAI_RESPONSES_STREAM_ERROR.md
description: >-
  Thrown when the SSE stream emits a malformed chunk, the transport throws
  mid-stream, or an explicit upstream `response.failed` / `error` terminal event
  arrives.
---

# Variable: E\_OPENAI\_RESPONSES\_STREAM\_ERROR

```ts
const E_OPENAI_RESPONSES_STREAM_ERROR: CreatedException<[string]>;
```

Defined in: [src/batteries/llm/openai\_responses/exceptions.ts:64](https://github.com/NHTIO/ADK/blob/v1.20260901.0/src/src/batteries/llm/openai_responses/exceptions.ts#L64)

Thrown when the SSE stream emits a malformed chunk, the transport throws mid-stream, or an
explicit upstream `response.failed` / `error` terminal event arrives.

## Remarks

NOT thrown when the stream reaches EOF without ever observing a terminal event. The Responses
SSE stream has no `[DONE]` sentinel, so a truncated-looking stream is indistinguishable from a
short one: the adapter warn-logs (`kind: 'sse-eof-without-terminal-event'`) and drains whatever
it accumulated, rather than discarding a usable partial turn.