mod_jk - apache tomcat problem

[Matthew Carpenter]

Chong Yu Meng wrote:

> Hi Lonni !
>
> Net Llama! wrote:
>
>> The missing tidbit that I should have probably mentioned is this 
>> isn't so much my server, as just needed for the product that my 
>> employer sells.  So i'm not all that atuned to the technologies 
>> behind it.
>>
> Ow ! That's going to be tough to support. Tomcat configuration can be 
> a special kind of hell. I still have problems with certain 
> combinations and scenarios, which was why I put my document together 
> in the first place. The documentation on the Jakarta site is a little 
> sparse, and if you're coming to Tomcat from a non-Java background, or 
> if you're new to Tomcat as a servlet engine, it can be a little scary.
>
> Anyway, if you need to do a deployment (or support one), here are a 
> few things to watch out for:
>
> 1. The Java SDK you use is crucial -- for RHEL or any Linux 
> distribution with NPTL enabled, use 1.4.1 or better. If you're using 
> Sun's Java SDK, test that Tomcat runs properly *with the web 
> application*, before doing further configuration or integration with 
> Apache. Some of the early version releases have been buggy. You don't 
> want to waste time troubleshooting Tomcat if it is a Java problem.
>
> 2. For mod_jk2, use the source tarball. Ignore the part in the README 
> that says you should run the Ant task. It doesn't work. The 
> instructions in my document will give you the make process and the 
> necessary switches. Please ensure that all necessary packages are 
> installed, because the make process doesn't tell you much about any 
> errors and they are easy to miss.
>
> 3. For integration with Apache using mod_jk2, you will need to know 
> how the servers are deployed:
> - Tomcat + Apache on same server (UNIX/Linux) ==> UNIX sockets, 
> channel sockets
> - Tomcat + Apache on same server (Windows) ==> JNI, channel sockets
> - Several Apache servers + 1 Tomcat server ==> channel sockets
> - 1 Apache server + several Tomcat servers ==> channel sockets
>
> There is actually an easier method of integrating Apache and Tomcat 
> without using mod_jk or mod_jk2. You can setup Apache as a reverse 
> proxy and connect Tomcat to it. The problem with that approach is that 
> Tomcat only sees one client -- Apache, and there were some reports of 
> session problems. I'm not too clear on the specifics there.
>
> Anyway, I'm looking to expand the document, especially with regards to 
> load balancing and channel sockets, so if you need to use those, just 
> let me know. I'd like to help out.
>
> Regards,
> pascal chong
>
>
>
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How does this compare to using the Warp connectors?  and ajp13 (or is 
that mod_jk)?