[Bug] Anthropic API Error: Repeated 503 Upstream Connection Resets - FIX YOUR ***
Bug Description
-rwxr-xr-x 1 root root 21911 Sep 3 09:25 /var/www/dashboard/sales-ops/index.html.backup-20250903-092539
⎿ API Error (503 upstream connect error or disconnect/reset before headers. reset reason: overflow) · Retrying in 5 seconds… (attempt 4/10)
⎿ API Error (503 upstream connect error or disconnect/reset before headers. reset reason: overflow) · Retrying in 8 seconds… (attempt 5/10)
⎿ API Error (503 upstream connect error or disconnect/reset before headers. reset reason: overflow) · Retrying in 20 seconds… (attempt 6/10)
⎿ API Error (503 upstream connect error or disconnect/reset before headers. reset reason: overflow) · Retrying in 35 seconds… (attempt 7/10)
⎿ API Error (503 upstream connect error or disconnect/reset before headers. reset reason: overflow) · Retrying in 39 seconds… (attempt 8/10)
⎿ API Error (503 upstream connect error or disconnect/reset before headers. reset reason: overflow) · Retrying in 33 seconds… (attempt 9/10)
- getting this quite often.. not cool
Environment Info
- Platform: darwin
- Terminal: WarpTerminal
- Version: 1.0.100
- Feedback ID: b612fda4-1858-41b6-a99d-5290863bffb7
Errors
[{"error":"AxiosError: Request failed with status code 503\n at fq (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:673:1077)\n at IncomingMessage.F0 (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:674:9955)\n at IncomingMessage.emit (node:events:519:35)\n at IncomingMessage.emit (node:domain:489:12)\n at endReadableNT (node:internal/streams/readable:1701:12)\n at process.processTicksAndRejections (node:internal/process/task_queues:90:21)\n at w21.request (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:676:2088)\n at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n at async H01 (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:2472:2750)\n at async Promise.all (index 0)\n at async F (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:3076:505)","timestamp":"2025-09-03T01:28:00.057Z"}]
9 Comments
API Error (503 upstream connect error or disconnect/reset before headers. reset reason: overflow) · Retrying in 4 seconds… (attempt 4/10)
⎿ API Error (503 no healthy upstream) · Retrying in 8 seconds… (attempt 5/10) API Error (503 upstream connect error or disconnect/reset before headers. reset reason: overflow) · Retrying in 4 seconds… (attempt 4/10)
⎿ API Error (503 no healthy upstream) · Retrying in 8 seconds… (attempt 5/10)
NOT USABLE !
+1
⎿ API Error (503 no healthy upstream) · Retrying in 5 seconds… (attempt 4/10)
⎿ API Error (503 no healthy upstream) · Retrying in 10 seconds… (attempt 5/10)
⎿ API Error (503 no healthy upstream) · Retrying in 19 seconds… (attempt 6/10)
⎿ API Error (503 no healthy upstream) · Retrying in 36 seconds… (attempt 7/10)
⎿ API Error (503 no healthy upstream) · Retrying in 38 seconds… (attempt 8/10)
⎿ API Error (503 no healthy upstream) · Retrying in 33 seconds… (attempt 9/10)
⎿ API Error: Operation aborted
⎿ API Error (503 no healthy upstream) · Retrying in 4 seconds… (attempt 4/10)
⎿ API Error (503 no healthy upstream) · Retrying in 10 seconds… (attempt 5/10)
⎿ API Error (503 no healthy upstream) · Retrying in 19 seconds… (attempt 6/10)
⎿ API Error (503 no healthy upstream) · Retrying in 37 seconds… (attempt 7/10)
+1
⎿ API Error (503 upstream connect error or disconnect/reset before headers. reset reason: overflow) · Retrying in 4 seconds… (attempt 4/10)
⎿ API Error (503 upstream connect error or disconnect/reset before headers. reset reason: overflow) · Retrying in 10 seconds… (attempt 5/10)
⎿ API Error (503 upstream connect error or disconnect/reset before headers. reset reason: overflow) · Retrying in 19 seconds… (attempt 6/10)
⎿ API Error (503 upstream connect error or disconnect/reset before headers. reset reason: overflow) · Retrying in 40 seconds… (attempt 7/10)
⎿ API Error (503 upstream connect error or disconnect/reset before headers. reset reason: overflow) · Retrying in 34 seconds… (attempt 8/10)
⎿ API Error (503 no healthy upstream) · Retrying in 39 seconds… (attempt 9/10)
⎿ API Error (503 no healthy upstream) · Retrying in 36 seconds… (attempt 10/10)
⎿ API Error: 503 no healthy upstream
Had the same problem. https://status.anthropic.com/ shows:
Elevated error rates on API and claude.ai
Identified - The issue has been identified and a fix is being implemented.
Sep 03, 2025 - 01:34 UTC
⎿ API Error (Request timed out.) · Retrying in 5 seconds… (attempt 4/10)
⎿ API Error (Request timed out.) · Retrying in 8 seconds… (attempt 5/10)
⎿ API Error (Request timed out.) · Retrying in 17 seconds… (attempt 6/
1.07 PM UTC+8
⎿ ⚠ Fast Refresh had to perform a full reload due to a runtime error.
⎿ API Error (503 upstream connect error or disconnect/reset before headers. reset reason: remote connection failure, transport failure reason: delayed connect error: Connection refused) · Retrying in 4 seconds… (attempt 4/10)
⎿ API Error (503 upstream connect error or disconnect/reset before headers. reset reason: remote connection failure, transport failure reason: delayed connect error: Connection refused) · Retrying in 10 seconds… (attempt 5/10)
⎿ API Error (503 upstream connect error or disconnect/reset before headers. reset reason: remote connection failure, transport failure reason: delayed connect error: Connection refused) · Retrying in 17 seconds… (attempt 6/10)
⎿ API Error (503 upstream connect error or disconnect/reset before headers. reset reason: remote connection failure, transport failure reason: delayed connect error: Connection refused) · Retrying in 38 seconds… (attempt 7/10)
⎿ API Error (503 upstream connect error or disconnect/reset before headers. reset reason: remote connection failure, transport failure reason: delayed connect error: Connection refused) · Retrying in 40 seconds… (attempt 8/10)
⎿ API Error (503 upstream connect error or disconnect/reset before headers. reset reason: remote connection failure, transport failure reason: delayed connect error: Connection refused) · Retrying in 34 seconds… (attempt 9/10)
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