CentOS 6.x changed locations and such of some things, so existing rpm files may or may not work unfortunately. I get the same error on my 64 bit CentOS 6.4 boxes. (I believe it means it cannot find your java install)
I typically don't use the rpm myself, instead opting for the tar.gz and a "manual" install, which ends up using your system's jvm just fine.
You can try installing the 32bit java on your server (you probably have the 64bit version now) from either openjdk (if available) or Oracle's Java. Or, if you use the tar.gz, it will take some manual work, but if you read through the guides it's pretty straight forward.
http://www.igniterealtime.org/builds/openfire/docs/latest/documentation/install- guide.html
http://www.igniterealtime.org/builds/openfire/docs/latest/documentation/database .html