HTTP 421 Misdirected Request Error: Meaning & Fix
The HTTP 421 Misdirected Request error occurs when your request is sent to a server that cannot respond appropriately. This often happens in web scraping when the scraper attempts to reuse a connection or contacts an unintended server due to misconfigured headers or proxy setups.
Why does it happen?
There are several reasons for the 421 error, including:
Reusing a connection that was previously used to communicate with a different server.
Server configuration issues that prevent it from accepting requests from the current client.
Incorrect DNS configuration leading to requests being sent to the wrong server.
Load balancers or reverse proxies routing requests incorrectly within a network.
# Request example curl -X POST https://sandbox.oxylabs.io/ -H 'Accept: application/xml;q=0.9' -H 'Accept-Encoding: br' -H 'User-Agent: AppleWebKit/537.36'
Try Scraper API with 5K results
Common fixes
Methods you can try to remedy the error include:
Verify the server configuration to ensure it matches the intended target.
Avoid reusing server connections that may be misdirected.
Check the DNS settings to ensure requests are routed to the correct server.
Implement HTTP/2 server push with care to prevent misdirected requests.
# Response example HTTP/1.1 421 Misdirected Request Content-Type: text/xml; charset=utf-8 Content-Length: 123421Misdirected Request
Forget HTTP errors with Scraper API
Web Scraper API
Public data delivery from the majority of websites
From
49