I had this problem from installing netbeans. I uninstalled it, but there was still some configurations in the <catilina home>/config/web.xml file. Remove the following:
If you want an IDE, perhaps you'd like to try eclipse.
edit your [$TOMCAT_HOME]/conf/web.xml file and rip out the following section from the top - where Netbeans snuck it in, and didn't remove - even if i uninstalled it
=========================================
<filter>
<filter-name>HTTPMonitorFilter</filter-name>
<filter-class>org.netbeans.modules.web.monitor.server.Moni torFilter</filter-class>
<init-param>
<param-name>netbeans.monitor.ide</param-name>
<param-value>127.0.0.1:8082</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>HTTPMonitorFilter</filter-name>
<url-pattern>/*</url-pattern>
<dispatcher>REQUEST</dispatcher>
<dispatcher>FORWARD</dispatcher>
<dispatcher>INCLUDE</dispatcher>
<dispatcher>ERROR</dispatcher>
</filter-mapping>
=========================================
|