Running Tomcat through eclipse works fine in non-debug mode, but not in debug mode. When I try to start the Tomcat server in debug mode, the console output looks fine for a
I too stumbled upon this issue.
I closed all the irrelevant projects. Cleared out my breakpoints. Increased STS VM memory. Follow this blog: http://searchforsolutions.wordpress.com/2011/12/01/eclipse-jvm-settings-for-optimized-performance/ Disabled the JBoss tool validators and all other validators.
Now STS works like a charm!