llm runtime_error ai_generated true

Error: Failed to parse SSE stream: unexpected end of data

ID: llm/streaming-sse-parse

Also available as: JSON · Markdown
80%Fix Rate
82%Confidence
3Evidence
2023-01-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
any active — — —

Root Cause

Server-Sent Events stream from LLM API failed to parse correctly.

generic

Workarounds

  1. 85% success Handle partial chunks and reconnection in SSE client 
    Buffer partial data lines; reconnect with Last-Event-ID header
  2. 90% success Use official SDK streaming helpers 
    openai.chat.completions.create(stream=True) handles SSE parsing

Dead Ends

Common approaches that don't work:

  1. Buffer entire stream before parsing 85% fail

    Defeats the purpose of streaming and may OOM on large responses.

  2. Use WebSocket instead of SSE 80% fail

    Most LLM APIs only support SSE for streaming.