I would seldom dare to differ with Mark with regards to Tomcat issues
but in this case, I prefer mod_AJP for its more
predictive behavior compared to mod_HTTP. Tomcat AJP's connector
simulates almost the same behavior as Tomcat's HTTP connector.
So the all important request headers will look the same. Some of the
differences in behavior when you use Tomcat HTTP as a proxy instead of AJP:
1)remoteAddr resolves to whatever host Apache connects from to Tomcat.
So you have to retrieve the actual remote address from the raw headers.
2)scheme will always be HTTP
3)serverPort will always be the Tomcat HTTP port (so you would need to
edit server.xml and add the proxyport value)
4)many applications construct links from the above headers mentioned
and you can see the problems the inconsistent behavior creates.
Unless mod_proxy_ajp is far inferior to mod_proxy_http in terms of
stability (which has not been noticeable from my experience),
I would choose mod_proxy_ajp for the consistent behavior it provides.
Mark Thomas wrote:
Markus Schönhaber wrote:
Mark Thomas:
Actually, mod_proxy_http is usually a better choice than mod_proxy_ajp
Could you please explain a little further?
Since at one site I'm using mod_proxy_ajp I'm interested in what the
advantage of switching to mod_proxy_http might be.
Generally, and YMMV, mod_proxy_http is more stable. This is only a
generalisation though. I have used mod_proxy_ajp in the past without any
problems.
Other reasons include:
- you can use https for encryption
- it is easier (at least I find it easier) to read http in wireshark than ajp
Mark
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Gabe Wong
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