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Claude Code Stuck on a Spinner With No Response: It Waits 6 Minutes per Attempt, and 10 Retries Can Hang It for Over an Hour (Tested)
When Claude Code spins without output or sits at Retrying in 0s, the backend is usually not sending anything. Tested on 2.1.285 (API key + ANTHROPIC_BASE_URL): with no response headers it waits 6 minutes (360 s) per attempt before timing out — setting API_TIMEOUT_MS to 600000 or 900000 doesn't change that; only lower values work. With the default 10 retries it can hang for over an hour. A gateway that buffers the reply until generation finishes will never deliver a reply that takes over 6 minutes. Press Esc to interrupt. All tested against a local stub.
claude-codetroubleshooting+5
pitfallsOct 5, 20269 min
551
Claude Code "Command timed out after 2m 0s": Two Timeout Paths, BASH_DEFAULT_TIMEOUT_MS and run_in_background Tested
Claude Code's Bash tool times out after 120 seconds by default. I ran 19 real sessions on 2.1.280 and found two timeout paths: only commands whose first word is sleep get killed with Exit code 143 / Command timed out after 2m 0s; everything else is moved to the background and killed 5 seconds after claude -p winds down. Either way claude exits 0, stderr is 0 bytes and the JSON top level says is_error=false. BASH_DEFAULT_TIMEOUT_MS=8000 killed at 8.17s; 0 or abc silently fall back to 120s; an explicit timeout above BASH_MAX_TIMEOUT_MS was silently clamped to 15s.
claude-codetroubleshooting+4
pitfallsSep 26, 20269 min
361
Claude Code MCP server Failed to connect: CONNECTION_CLOSED, connection timed out after 30000ms and ENOENT, reproduced one by one
Six causes behind Claude Code's MCP "Failed to connect", reproduced on 2.1.280: mcp list exits 0 on failure, CONNECTION_CLOSED hides two causes that only --debug-file reveals, and one server that never handshakes pushes claude -p wall time 4.63s → 36.21s, duration_ms only 4323.5 → 5930.
mcpclaude-code+4
pitfallsSep 24, 202610 min
385