[Random PHP FastCGI / Connection reset by peer / incomplete headers]

I've been having random 500 Internal Server errors on my PHP / MySQL based sites on various shared hosts. I'm using PHP 5.2.17 through CGI/FastCGI on a shared Linus server. When I look in the logs, I see this:

 

[error] [client 75.71.176.224] (104)Connection reset by peer: FastCGI: comm with server "/dev/shm/blackmou-php.fcgi" aborted: read failed, referer: ...
[error] [client 75.71.176.224] FastCGI: incomplete headers (0 bytes) received from server "/dev/shm/blackmou-php.fcgi", referer: ...
[error] [client 75.71.176.224] (104)Connection reset by peer: FastCGI: comm with server "/dev/shm/blackmou-php.fcgi" aborted: read failed, referer: ...
[error] [client 75.71.176.224] FastCGI: incomplete headers (0 bytes) received from server "/dev/shm/blackmou-php.fcgi", referer: ...

 

Anyone know how to resolve this?

[HELP! Where’s expert help for a random internal server error on my custom php, mysql, magento sites?]

We keep having random 500 Internal Server Errors on several of our PHP, MySQL, Magento based sites. I’ve spent hours trying to hunt down what’s happening.

 

Where can I find a php, mysql, magento expert to help me resolve this for good?

 

(Also, our host says our PHP-FPM process continues to segfault. If you know what that means.)