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Check for errors in the URL. The most common reason for a 400 Bad Request error is because the URL was typed wrong or the link that was clicked on points to a URL with a specific kind of mistake in it, like a syntax problem.
Important: This is most likely the problem if you get a 400 Bad Request error. Specficially, check for extra, typically non-allowed, characters in the URL like a percentage character. While there are perfectly valid uses for something like a % character, you won't often find one in a standard URL.
Clear your browser's cookies, especially if you're getting a Bad Request error with a Google service. Many sites report a 400 error when a cookie it's reading is corrupt or too old.
Clear your DNS cache, which should fix the 400 Bad Request error if it's being caused by outdated DNS records that your computer is storing. Do this in Windows by executingipconfig /flushdns from a Command Prompt window.
Important: This is not the same as clearing your browser's cache (next thing to try below).
Clear your browser's cache. A cached, but corrupt copy of the web page you're trying to access, but are getting the 400 error on, could be the root of the problem. Clearing your cache is unlikely the fix for the majority of 400 bad Request issues, but it's quick and easy, and so worth trying.
While this is not a common fix, try troubleshooting the problem as a 504 Gateway Timeoutissue instead, even though the problem is being reported as a 400 Bad Request.
In some relatively rare situations, two servers may take too long to communicate (agateway timeout issue) but will incorrectly, or at least unhelpfully, report the problem to you as a 400 Bad Request.
Contact the website directly that hosts the page. It's possible that the 400 Bad Request error actually isn't anything wrong on your end and it's something they need to fix, in which case letting them know about it would be very helpful.
hi, If "your browser sent a request that this server could not understand" and "size of request header field exceeds server limit", your request is a bad or oversized cookie. (The same thing is true for "Error 400").
For some very strange reason, it seems 9 of 10 Bad Request messages implicate Firefox.
Simply delete your "Cookies" and everything will be okay. Don't worry about erasing them; nothing bad will happen. You won't lose your internet browser's "Bookmarks" or "Favorites". The worst thing that could happen is you will be asked to retype your username/password when you return to YouTube and some other websites -- that's all.
As you're dumping your cookies, you should also erase all your "Temporary Internet Files" and "History". This will render your computer totally "fresh" in YouTube's eyes. It would be best if you shutdown / reboot after doing this:
Internet Explorer 6: > Tools > Internet Options > Delete Cookies > OK > Delete Files > OK > Clear History > Yes > OK
Internet Explorer 7: > Tools > Internet Options > Delete... > Delete files > Yes > Delete cookies > OK > Delete history > OK > Close (browsing history window) > OK
Go to Tools. Hit Options. Hit the Privacy button. Press "Show Cookies"
in the middle of the page. Go all the way down to Youtube.com and
double click on it. Click on the first one. It will tell you something
in the space called "Content".in the description. On the server problem
on You Tube, look at what is says. It will say stuff like :
you look at each cookie description content and find the 2 that match the first and second part of the error.
Delete those cookies. Refresh the page. IT will work find, AND WILL LET YOU LOG IN.
The reason behind the error:
This is something that happens when a user signs in and out of their
youtube account constantly or sees many people's channels nonstop.
1. Use Opera browser, it will load faster and smoother
reinstall the latest flash player, and . make sure all the browsers are NOT running during installation..
or
youcan have the Mozilla Firefox browser and have some version of Java Runtime..
Go to Tools. Hit Options. Hit the Privacy button. Press "Show Cookies"
in the middle of the page. Go all the way down to Youtube.com and
double click on it. Click on the first one. It will tell you something
in the space called "Content".in the description. On the server problem
on You Tube, look at what is says. It will say stuff like :
you look at each cookie description content and find the 2 that match the first and second part of the error.
Delete those cookies. Refresh the page. IT will work find, AND WILL LET YOU LOG IN.
The reason behind the error:
This is something that happens when a user signs in and out of their
youtube account constantly or sees many people's channels nonstop.
Cause
The 400 Bad Request error is an HTTP status code that means that the request you sent to the website server (i.e. a request to load a web page) was somehow malformed therefore the server was unable to understand or process the request.
Resolution
Check for errors in the URL. The most common reason for a 400 Bad Request error is because the URL was typed wrong or the link that was clicked on points to a URL with some kind of mistake in it.
Though it's rare, the 400 Bad Request error could be an issue with the web site's server that you are trying to access. You may want to attempt to contact the webmaster or another site contact and inform them of the error message. The webmaster of most Internet sites can be reached via email at [email protected], replacing website.com with the actual website name.
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