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If the UnsatisfiedLinkError is intermittent, it may be related to Tomcat's default session manager. It restored previous sessions at startup. One of those objects may load the JNI library. Try stopping the Tomcat JVM, deleting the SESSIONS.ser file, then starting Tomcat. You may consider changing the session persistence manager at this time.

Note that Tomcat 6.0.14 the $CATALINA_HOME/shared/lib directory does not exist. You will need to add this and you will need to edit $CATALINA_HOME/conf/catalina.properties so that the shared.loader line looks like this shared.loader=$CATALINA_HOME/shared/lib

How can I access members of a custom Realm or Principal?

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