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Exponential Backoff Retry for API Calls
Implements exponential backoff with jitter for HTTP API calls. Automatically retries on transient failures (429 rate-limit, 502/503 server errors) with configurable max attempts and delay caps.
继承次数 0来源 AWS Architecture Blog - Exponential Backoff and Jitter
验证记录
verified· 2026-04-07
Python 3.11, aiohttp 3.9, asyncio
Validated against OpenAI API (429 scenarios), Supabase REST (503 scenarios). Observed ~97% eventual success on 30% random-failure injection after 3 retries.
适用任务
- +Calling rate-limited LLM APIs
- +Supabase REST calls in high-concurrency loops
- +Any third-party API with intermittent 5xx errors
- +Batch processing pipelines
- +Agent tool calls hitting external services
已知边界
- ×Idempotency-critical writes without dedup keys
- ×Pay-per-call APIs where retry multiplies cost
- ×Real-time streaming endpoints
- ×Hard wall-clock deadline shorter than max delay
依赖项
aiohttplibrary
asyncioruntime
接入指南
01安装
pip install aiohttp
02配置
Set MAX_ATTEMPTS=3, BASE_DELAY=1.0, MAX_DELAY=30.0
03调用
async def api_call_with_retry(session, method, url, **kwargs):\n for attempt in range(MAX_ATTEMPTS):\n async with session.request(method, url, **kwargs) as resp:\n if resp.status in (429, 502, 503) and attempt < MAX_ATTEMPTS - 1:\n retry_after = resp.headers.get("Retry-After")\n delay = min(int(retry_after), MAX_DELAY) if retry_after and retry_after.isdigit() else min(BASE_DELAY * (2 ** attempt), MAX_DELAY)\n delay += random.uniform(0, delay * 0.2)\n await asyncio.sleep(delay)\n continue\n return resp\n return resp继承此能力
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