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After using Eclipse with the Sysdeo Tomcat plugin for a while I came
across an interesting problem. Each time I attempted to start Tomcat
the IDE would keep stopping on an exception thrown in parseInt() of
Integer. After pressing F8 a hundred times Tomcat would eventually
start, but debugging was practically impossible.

After some searching, the solution presented itself as this

1) File | Switch Workspace...
2) Choose your current workspace
3) Start Tomcat and all should be well.

Further details can be found here
http://www.myeclipseide.com/index.ph...&p=32694#32694

Many thanks to the team at MyEclipse for this one.