Hi, The default debug level is 0 for Tomcat. When I looked at http://tomcat.apache.org/bugreport.html website for Tomcat bug reporting, they mentioned that they need Log file excerpts mentioned below Log file excerpts - Review your logs files, reproduce the bug with debugging enabled in your Apache Tomcat configuration. Then submit any relevant sections of the log which help document the bug. In our project we didn't change debug level for Tomcat...using default debug level 0. If we get any issues, we need to capture Log file Excerpts to open Tomcat bug for your investigation. My question is which debug level ( 0 .. 4) we need to set in our project to get sufficient logs for resolving Tomcat bug. At the same time , we may not set high debug level as it may degrade server performance. Please advice as soon as possible. Thanks for your help. Thanks, Sai.