HTTP 502 Proxy Error - The size of the response header is too large. Contact your ISA server administrator. (12216)

Some of my users are getting the following error

HTTP 502 Proxy Error - The size of the response header is too large. Contact your ISA server administrator. (12216) Internet Security and Acceleration Server开发者_运维技巧

I am guessing it has to do with the size of hidden "__ViewState" tag in my ASP.NET pages.

I also realize that this is restriction imposed to by IT on the users end and I have no contol over it.

I disabled ViewState on all the controls in my ASP.NET pages. However, __ViewState is still generated very large (as always) to persist control-state (e.g. checkbox, radiobutton, etc.)

Is there a workaround that I can try?

First, if ISA is complaining about the response "header" then it's not likely viewstate. Viewstate is "simply" a form field in the body of the page. There are many things you can do to reduce the size of ViewState, along with products that will let you eliminate it from the page response completely (ours at http://www.techsoftinc.com/viewstate being but one of many.)

If you've disabled all the viewstates on the page and it's still "very large" I'd suggest running it through a viewstate decoder to see what's actually in it. Have you perhaps not disabled it on a datagrid or other control that's stashing a ton of data in it?

However beyond ViewState, what's actually in the header of the response? (not the tag, but the headers that come before the response.) You may need something like fiddler to show you.

Can you elaborate the what triggered error, generally it's happens due to file dwld code

Such as response.write.....

Try configuring web.config.. Max request length .. Sorry for incomplete answer but answered frm mobile that's reason..