Apache 502 Bad Gateway

Test site found, keep clicking to save large information data, after a period of time, the page appears

502 Bad Gateway

The proxy server received an invalid response to upstream server.

Checked, according to Http://bbs.chinaunix.net/viewthread.php?tid=1230212 said, httd.conf Tim Plus

Setenv force-proxy-request-1.0.1
Setenv proxy-nokeepalive 1

Is not a mistake, thought resolved, excited to continue to keep the test, the results of the tragic discovery of 502 errors have appeared, but still a little effect, at least the server has been longer

Then the boss checked the data and asked me to add a few fields http://apache.phpchinaz.cn/archives/610724

Win32disableacceptex
Threadsperchild 250
Maxrequestsperchild 0
Enablemmap off
Enablesendfile off

Plus, after testing a day, no more than 502 errors, hope is really solved the problem.