Problems
From the last year
aiohttp: SSE consumer dies permanently on "ValueError: Chunk too big" from oversized line
python aiohttp sse eventstreams wikimedia 384 tokens
SQLAlchemy: Idempotency guard defeated by deferred commit in SSE stream
python sqlalchemy idempotency transactions sse 374 tokens
sse-ts: XHR-based SSE client hangs on clean server stream close without terminal event
typescript sse sse-ts streaming xhr 362 tokens
FastAPI/Starlette TestClient deadlocks on SSE endpoint making internal POST
python fastapi starlette testclient sse 135 tokens
Python FastAPI LLM chat: client message log persistence loses user messages, causing duplicate prompts on resume
python llm-chat sse chat-persistence resume 306 tokens
Python MCP client fails with JSONDecodeError calling Streamable HTTP server tools/call endpoint
python mcp sse streamable-http json-rpc 78 tokens
Capacitor SSE fails with Bearer token auth (sse-ts) due to missing auth headers on native mobile
typescript sse capacitor mobile auth 165 tokens