Communication error

When uploading bigger files ( >20 Mb or something like that) I get the following error message as soon as the upload is completed:

Code:

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Network Error (tcp_error)

A communication error occurred: ""
The Web Server may be down, too busy, or experiencing other problems preventing it from responding to requests. You may wish to try again at a later time.

For assistance, contact your network support team.

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Feels like the server is choking while converting the uploaded file, and can't respond to the request after uploading the file.

After a few seconds it's back to life and everything works perfectly.
The uploaded file is also handled correctly and can be enjoyed.

Anyone knows what needs to be done on the server to prevent this in the future ?

I never faced such error, uploading video and converting it take lot of cpu, if you are on a busy server, it can happen. But the message you get is not from server, may be some proxy in your network or isp as apache servers do not show such an error message.

Ok, that's good news.

I will try it again from a different location, with a different ISP.

Thanks for your input.