Home/ Questions/Q 7917547
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-06-03T15:11:17+00:00

I’m using Eclipse to debug a web application through a local installation of Tomcat.

  • 0

I’m using Eclipse to debug a web application through a local installation of Tomcat.

When I start the Tomcat server through Eclipse and watch the catalina.out as the WAR file is unpacked, the Eclipse debugger will suspend and jump to a NoClassDefFoundError in the bootstrap thread multiple times (5-6) during startup. The only reason it’s doing this is because I have explicitly set breakpoints on instances of NoClassDefFoundError. The application deploys and runs as expected, but I still want to know what is going on with the NoClassDefFoundError.

catalina.out doesn’t show anything about these exceptions and I can’t find any information about what’s causing this other than the fact that the breakpoints are being hit.

Anyone know how I can tell Eclipse to show me the specific of the exception being thrown? I have the stack trace, but it’s not very helpful since I don’t have the source attached for the libraries that it’s occurring in.

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    May be you can see more details if you modify the loggin level. If you use the default Tomcat without custom modifications, then edit the file ${catalina.base}/conf/logging.properties and replace with FINEST in several lines:

    org.apache.catalina.level=FINEST

    In your application, add the file WEB-INF/classes/logging.properties

    For more details about that, see http://tomcat.apache.org/tomcat-6.0-doc/logging.html

    • 0