{"record":{"id":"ed72c5e50020c3d1","repo":"ZhuLinsen/daily_stock_analysis","slug":"alphavantage-http-request-failed-for-symbol","errorCode":null,"errorMessage":"[AlphaVantage] HTTP request failed for {symbol}: {e}","messagePattern":"\\[AlphaVantage\\] HTTP request failed for (.+?): (.+?)","errorType":"exception","errorClass":"DataFetchError","httpStatus":null,"severity":"error","filePath":"data_provider/alphavantage_fetcher.py","lineNumber":61,"sourceCode":"            raise DataFetchError(\"[AlphaVantage] API key not configured\")\n        if not self._is_us_stock(stock_code):\n            raise DataFetchError(f\"[AlphaVantage] {stock_code} is not a US stock\")\n\n        symbol = stock_code.strip().upper()\n        params = {\n            'function': 'TIME_SERIES_DAILY',\n            'symbol': symbol,\n            'outputsize': 'compact',\n            'apikey': self._api_key,\n        }\n\n        try:\n            self.random_sleep(0.5, 1.5)\n            resp = requests.get(_AV_BASE_URL, params=params, timeout=30)\n            resp.raise_for_status()\n            data = resp.json()\n        except Exception as e:\n            raise DataFetchError(f\"[AlphaVantage] HTTP request failed for {symbol}: {e}\") from e\n\n        if 'Note' in data:\n            raise DataFetchError(f\"[AlphaVantage] Rate limited: {data['Note']}\")\n        if 'Error Message' in data:\n            raise DataFetchError(f\"[AlphaVantage] API error for {symbol}: {data['Error Message']}\")\n\n        ts_key = 'Time Series (Daily)'\n        if ts_key not in data or not data[ts_key]:\n            raise DataFetchError(f\"[AlphaVantage] No time series data for {symbol}\")\n\n        rows = []\n        start = datetime.strptime(start_date, '%Y-%m-%d').date()\n        end = datetime.strptime(end_date, '%Y-%m-%d').date()\n        for date_str, values in data[ts_key].items():\n            row_date = datetime.strptime(date_str, '%Y-%m-%d').date()\n            if start <= row_date <= end:\n                rows.append({\n                    'date': date_str,","sourceCodeStart":43,"sourceCodeEnd":79,"githubUrl":"https://github.com/ZhuLinsen/daily_stock_analysis/blob/5159bd72e8373d215492dff122acc9d389e219c9/data_provider/alphavantage_fetcher.py#L43-L79","documentation":"A DataFetchError raised by AlphaVantageFetcher._fetch_raw_data wrapping any exception from the HTTP round-trip: requests.get (timeout=30s, after a 0.5-1.5s random sleep), raise_for_status, or resp.json() parsing. The original exception is chained via __cause__, and the symbol is included in the message for correlation.","triggerScenarios":"Network unreachable/DNS failure, TLS interception by corporate proxy, HTTP 4xx/5xx from alphavantage.net (raise_for_status), or a non-JSON response body causing JSONDecodeError — all within the single try block around the request.","commonSituations":"Firewalled environments blocking alphavantage.net; expired/wrong key causing HTTP 403-class responses; proxy env vars (HTTP_PROXY/HTTPS_PROXY) pointing at a dead proxy; occasional AV gateway 502/504s.","solutions":["Read e.__cause__: requests.exceptions.Timeout/ConnectionError → network; HTTPError → check status code; JSONDecodeError → gateway HTML error page.","Test connectivity: curl 'https://www.alphavantage.co/query?function=TIME_SERIES_DAILY&symbol=IBM&apikey=demo'.","Fix or unset proxy env vars if they intercept the request.","Retry transient timeouts once, then let the fetcher chain fall back to Yfinance/Akshare for US symbols."],"exampleFix":"# before\nresp = requests.get(_AV_BASE_URL, params=params, timeout=30)\n\n# after (caller side)\ntry:\n    df = av_fetcher.fetch(sym, start, end)\nexcept DataFetchError as e:\n    if isinstance(e.__cause__, requests.exceptions.Timeout):\n        df = av_fetcher.fetch(sym, start, end)  # one retry\n    else:\n        raise","handlingStrategy":"retry","validationCode":"import socket, requests\nrequests.get('https://www.alphavantage.co/query',\n            params={'function': 'TIME_SERIES_DAILY', 'symbol': 'IBM', 'apikey': 'demo'},\n            timeout=10)  # connectivity pre-flight","typeGuard":null,"tryCatchPattern":"import requests\nfrom data_provider.base import DataFetchError\ntry:\n    df = av_fetcher.fetch(sym, start, end)\nexcept DataFetchError as e:\n    if isinstance(e.__cause__, (requests.exceptions.Timeout, requests.exceptions.ConnectionError)):\n        time.sleep(5)\n        df = av_fetcher.fetch(sym, start, end)  # single retry\n    else:\n        raise","preventionTips":["Pre-flight the AV endpoint once per batch instead of discovering network issues per symbol.","Check HTTP_PROXY/HTTPS_PROXY in the runtime environment.","Wrap __cause__ in error logs to separate network vs API failures."],"tags":["alphavantage","http","network","timeout","data-provider"],"backgroundTag":null,"analyzedSha":"5159bd72e8373d215492dff122acc9d389e219c9","analyzedAt":"2026-08-15T01:59:36.292Z","schemaVersion":2},"datasetVersion":"2026-08-15T22:17:37.221Z"}