Here’s a problem a savvy web developer might run into. If you have a war that exports MBeans for JMX, upon dropping this war into Tomcat you may run into this nasty exception:
java.security.AccessControlException: access denied (javax.management.MBeanTrustPermission register)
This is caused by an overrestrictive security policy. Edit conf/catalina.policy to include this line:
grant {
permission javax.management.MBeanTrustPermission “register”;
};
Then add to your CATALINA_OPTS the following VM argument:
-Djava.security.policy=<path to catalina.policy>
I’m not sure if there’s a way to have Tomcat read in catalina.policy automatically, but if there is, I haven’t figured it out yet.
Posted by mikescode 