The last log line before it stops logging is:
2010-05-07 13:16:47,316 INFO [org.jboss.web.tomcat.service.deployers.TomcatDeployment] (main) deploy, ctxPath=/
Log4j is logging the server startup up to a certain point in the server.log and then it stops (I've run server as both a console app or windows service). This does not happen when it logs to the console we get a full log in the console window all the way to the server startup.
I have looked at liferay-portal-6.0.1\jboss-5.1.0\server\default\conf\jboss-log4j.xml
The Console Appender and File Appender should be behaving in the same manner according to the configuration.
I've even tried setting:
A standalone JBoss 5.1 server on the same machines logs all the way to a server startup, so I assume this is an issue with you modifications to the standard JBoss 5.1 server.