What does this mean your browser sent a query this server could not understand?

Topics Map > OS and Desktop Applications > Applications > Browsers

This document describes what to do if you receive a 400 Bad Request error message upon loading a website.

Problem

When you attempt to access a website, you may sometimes instead receive a "Bad Request" error message where the website content should have loaded. This error often contains the number "400" and may include additional text, such as "Your browser sent a request that this server could not understand. Size of a request header field exceeds server limit."

Solution

First, check the website URL you entered to make sure it is correct. If the web address appears to be entered correctly, then the issue can usually be resolved by clearing your browser's cache and cookies.

For instructions on performing these steps, click on the appropriate link for the web browser you are using:

Clearing the browser cache prevents you from using old/out-of-date versions of websites and protects your personal information. It also helps running some applications better on your computer by freeing up space.

Table with browser name and links to Windows documents and macOS documents.BrowserWindows Document LinkmacOS Document Link

Google Chrome	Chrome (Win) - Clearing Cache and Cookies	Chrome (Mac) - Clearing Cache and Cookies
Firefox	Firefox 57+ (Win) - Clearing Cache and Cookies	Firefox 21+ (Mac) - Clearing Cache and Cookies
Safari	Safari (Win) - Clearing Cache and Cookies	Safari 10.0.1+ (Mac) - Clearing Cache and Cookies
Internet Explorer 9, 10, & 11	Internet Explorer 9, 10 and 11 (Win) - Clearing Cache and Cookies	None
Microsoft Edge	Edge (Win) - Clearing Cache and Cookies	None
Opera	Opera (Win) - Clearing Cache and Cookies	Opera 28.0 (Mac) - Clearing Cache and Cookies
New Microsoft Edge	New Edge (Win 10, 8, 7, MacOS) - Clearing Cache and Cookies	New Edge (Win 10, 8, 7, MacOS) - Clearing Cache and Cookies

Table with mobile Operating System and corresponding documents on clearing cache and cookies.Operating SystemDocument Link

Android	Android (Jellybean) - Clearing Cache and Cookies on Google Chrome
iOS	iOS - Clearing Cache and Cookies
webOS	HP webOS 2.x - Clearing Cache and Cookies
Windows Phone	Internet Explorer (Windows Phone) - Clearing Cache and Cookies

Windows

MacOS

See Also:

• NetID Login - How to Fix a "Stale Request" Error

목차

1. Bad Request 오류 증상
2. Bad Request 크롬 해결책

Bad Request 오류 증상 

Bad Request

Your browser sent a request that this server could not understand.

Size of a request header field exceeds server limit.

Cookie

Apache/2.4.7 (Ubuntu) Server at localhost Port 443

Bad Request 크롬 해결책

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또는,
Ctrl + Shift + Del  키 눌러 인터넷 임사파일 모두 제거 후, 다시 접속 시도

PS. 이 팁 적용 후 아래 에러 비슷한 증상 생기면 다시 해제할 것.

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