From: Michael Mellinger <mmellinger66_at_gmail.com>
Date: Tue, 7 Apr 2009 21:56:48 -0400

We are using Apache ProxyPass with Glassfish and we are getting 502
errors more frequently.

"The proxy server received an invalid response from an upstream server."

Does this problem occur because have a configuration problem with one
of our servers? Should we try to increase the # of http-listeners?

Any help in how to track down this problem is appreciated.

-Mike