liferay install on tomcat 5.5 from #2 to #2

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1 Multiple Site Setup
Liferay reportedly (http://wiki.liferay.com/index.php/Virtual_hosting) supports virtual hosting.
When we tried that setup we got some odd errors.  e.g.:
{code}
java.lang.NullPointerException
     com.liferay.portal.struts.StrutsUtil.forward(StrutsUtil.java:72)
     com.liferay.portal.servlet.MainServlet.service(MainServlet.java:865)
07:56:27,202 ERROR [IndexConsumer:66] javax.jms.JMSException: Could not
create Transport. Reason:
javax.management.InstanceAlreadyExistsException:
org.apache.activemq:BrokerName=localhost,Type=Broker
Caused by: org.springframework.beans.factory.BeanCreationException:
Error creating bean with name
'com.liferay.portal.service.LayoutLocalServiceFactory' defined in class
path resource [META-INF/portal-spring-professional.xml]: Cannot resolve
reference to bean
'com.liferay.portal.service.LayoutLocalService.transaction' while
setting bean property 'service'; nested exception is
org.springframework.beans.factory.BeanCreationException: Error creating
bean with name
'com.liferay.portal.service.LayoutLocalService.transaction' defined in
class path resource [META-INF/portal-spring-professional.xml]:
Invocation of init method failed; nested exception is
java.lang.IllegalArgumentException: interface
org.springframework.aop.SpringProxy is not visible from class loader
{code}
We will try following up with Liferay to see if we can resolve this problem.
The workaround is to run separate Liferay instances. The procedure to do this is (in shorthand) for a new domain (e.g. example.com):
- cp /usr/local/liferay /usr/local/liferay.example.com (assuming your original liferay install is in /usr/local/liferay
- edit /usr/local/liferay.example.com/webapps/ROOT/web.xml and change the company_id to example.com
- edit /usr/local/liferay.example.com/conf/server.xml so it listens on different ports from the other virtual hosts.  e.g. for each new domain add 100 to the port number.  e.g. on the third one the 8080 port should be 8280, and the 8009 port should be 8209.
- ln -sf /etc/init.d/liferay /etc/init.d/liferay.example.com
- edit /etc/init.d/liferay and 'make it work' for the separate tomcat/liferay instance.
- edit /etc/httpd/conf/httpd.conf and setup mod_jk2 or mod_ajp_proxy to forward requests to the tomcat instance (remember to use the correct 8?09 address (e.g. 8009 or 8109 or 8209, etc).
- run chkconfig --level 35 liferay.example.com
- run /etc/init.d/liferay.example.com start
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