Lost connection failure in 3.0.19 and Apache

[Josh Schramm]

Hey everyone, 

I've seen this pop up on a couple of other posts but so far haven't been able to identify what's causing the problem for my sites. 

I have 2 sites on different hardware both running passenger 3.0.19 in apache. On both of them I frequently see a rapid number of error log entries that read

[ pid=25705 thr=140443691890656 file=ext/apache2/Hooks.cpp:808 time=2013-05-07 08:51:36.220 ]: Either the visitor clicked on the 'Stop' button in the web browser, or the visitor's connection has stalled and couldn't receive the data that Apache is sending to it. As a result, you will probably see a 'Broken Pipe' error in this log file. Please ignore it, this is normal. You might also want to increase Apache's TimeOut configuration option if you experience this problem often.

This morning one of the sites was actually inaccessible and I had to restart apache. I also bumped the PassengerMinInstances to 10 (from 3). 

Both sites are reasonably high traffic, but not outrageously so. One (The one that went down this morning) runs CentOS, apache, mysql. 

Happy to provide anything else needed but i'm totally lost on how to resolve this. Thoughts?

Thanks

[Hongli Lai]

You can fix this by upgrading to Phusion Passenger 4.

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