I have to restart my server several times to avoid the following: 4-Mar-08 12:56:12 AM org.apache.catalina.connector.MapperListener init WARNING: Error registering contexts java.util.ConcurrentModificationException at java.util.HashMap$HashIterator.next(libgcj.so.8rh) at gnu.javax.management.Server.queryMBeans(libgcj.so.8rh) at org.apache.catalina.connector.MapperListener.init(catalina-5.5.26.jar.so) at org.apache.catalina.connector.Connector.start(catalina-5.5.26.jar.so) at org.apache.catalina.core.StandardService.start(catalina-5.5.26.jar.so) at org.apache.catalina.core.StandardServer.start(catalina-5.5.26.jar.so) at org.apache.catalina.startup.Catalina.start(catalina-5.5.26.jar.so) at java.lang.reflect.Method.invoke(libgcj.so.8rh) at org.apache.catalina.startup.Bootstrap.start(bootstrap.jar.so) at org.apache.catalina.startup.Bootstrap.main(bootstrap.jar.so) 4-Mar-08 12:56:12 AM org.apache.jk.common.ChannelSocket init When I get it, the webapps do not load properly. I installed Tomcat 5.5.26 on Fedora 8 x86_64 with RPMs: 108$rpm -qa | grep tomcat jakarta-commons-pool-tomcat5-1.3-9jpp.3.fc8 tomcat5-servlet-2.4-api-5.5.26-1jpp.2.fc8 tomcat5-jsp-2.0-api-5.5.26-1jpp.2.fc8 tomcat5-jasper-5.5.26-1jpp.2.fc8 jakarta-commons-collections-tomcat5-3.1-9jpp.2.fc7.1 tomcat5-common-lib-5.5.26-1jpp.2.fc8 tomcat5-server-lib-5.5.26-1jpp.2.fc8 tomcat5-admin-webapps-5.5.26-1jpp.2.fc8 tomcat5-webapps-5.5.26-1jpp.2.fc8 jakarta-commons-dbcp-tomcat5-1.2.1-10jpp.2.fc8 tomcat5-5.5.26-1jpp.2.fc8 The machine is dual CPU with dual cores, and is using gcj as installed by default with Fedora 8 RPMs.
This is a problem with the gnu java distro.