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botkevin
approved these changes
Aug 13, 2025
Huw-man
approved these changes
Aug 13, 2025
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Add configurable SSE heartbeats for Streamable HTTP to prevent idle disconnects
Problem
The GET SSE “listen” connection stayed idle during long/quiet tool runs.
Infrastructure (e.g., Cloud Run/GFE) closed idle connections (~4 min), causing clients to log “Cleaning up crashed session …” and drop the session.
Logs show GET to the MCP endpoint lasting ~250s followed by client cleanup.
View attached logs for more context:
downloaded-logs-20250813-122539.csv