In my attempt to update my Hudson war from 1.74 to 1.86 I was unable to successfully startup the
newly deployed 1.86 war in Tomcat 5.5.17 under Java 1.5.0_06-b05. Tomcat's catalina.out log
reported the following:

Mar 13, 2007 5:15:07 PM hudson.TcpSlaveAgentListener <init>
INFO: JNLP slave agent listener started on TCP port 42181
Mar 13, 2007 5:15:07 PM org.apache.catalina.core.StandardContext start
SEVERE: Error listenerStart
Mar 13, 2007 5:15:07 PM org.apache.catalina.core.StandardContext start
SEVERE: Context [/hudson] startup failed due to previous errors
Mar 13, 2007 5:15:57 PM org.apache.catalina.core.StandardContext stop
INFO: Container org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/hudson] has not been
started