Shane Weaver [http://community.jboss.org/people/sgtw_speed] created the discussion "Re: java.net.SocketException: Too many open files on Red Hat" To view the discussion, visit: http://community.jboss.org/message/561362#561362 -------------------------------------------------------------- We're having the same problem on JBoss 4.2.1 GA - we compiled jbossweb 2.0.0.x and replaced the jbossweb.jar file under jboss-web.deployer as suggested, but getting the following error on startup.  Are you sure no other change is needed? org.jboss.deployment.DeploymentException: - nested throwable: (java.lang.reflect.UndeclaredThrowableException) Caused by: java.lang.NoClassDefFoundError: org/apache/catalina/Lifecycle It's odd, because Lifecycle is definitely found within the jbossweb.jar file. -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/561362#561362] Start a new discussion in Performance Tuning at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]