You may receive NullPointerException errors when monitoring Tomcat Servers using the JMX monitor. When monitoring with the Orion agent for Linux, the JMX monitor requires Java Virtual Machine (JVM) version 1.6 or later.
To resolve, we recommend checking or upgrading your JVM version, upgrade Tomcat if needed, and use the Tomcat Server monitor.
We recommend using the Tomcat Server monitor for monitoring Tomcat Servers. You may need to change your templates and component monitors to use this component monitor type.