Error 324 (network :: ERR_EMPTY_RESPONSE)

Question

I often encounter the above problem, now days for many of our sites. They worked correctly about a month ago, but suddenly more than 10 sites give this error not only in crome, but also in another browser (not the same, but related).

Error 324 (net::ERR_EMPTY_RESPONSE): The server closed the connection without sending any data.

All sites are hosted on the same server and in joomla. When I tried to debug, I found that perhaps this inscription is in the code below, but not sure.

modMainMenuHelper::render($params, 'modMainMenuXMLCallback');
//render function
function render(&$params, $callback){
//function body
}

If I repeat anything above the modMainMenuHelper::render($params, 'modMainMenuXMLCallback');output echo. But below function render(&$params, $callback){the above error appears. I wanted to ask if the problem in the above code really is, than to solve this or any other suggestions that might solve this problem Thanks.

Answer 1

, APC. . , , , . , - .

Answer 2

APC pagespeed ... fcgi, , . ...

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