JON server/agent throwing java.lang.NoClassDefFoundError exceptions referencing standard JRE classes

Issue

• Receive the following message under the 'Alerts' 'Notifications' tabs "Failed - cause:java.lang.NoClassDefFoundError: Could not initialize class java.net.PlainDatagramSocketImpl"
• When restarting JON server, find errors similar to:

2012-11-07 13:10:07,144 INFO  [org.apache.catalina.core.AprLifecycleListener] The Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: /usr/lib/jvm/java-1.6.0-sun-1.6.0.37.x86_64/jre/lib/amd64/server:/usr/lib/jvm/java-1.6.0-sun-1.6.0.37.x86_64/jre/lib/amd64:/usr/lib/jvm/java-1.6.0-sun-1.6.0.37.x86_64/jre/../lib/amd64:/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
2012-11-07 13:10:07,268 INFO  [org.apache.coyote.http11.Http11Protocol] Initializing Coyote HTTP/1.1 on http-0.0.0.0-7080
2012-11-07 13:10:07,510 ERROR [org.apache.tomcat.util.modeler.BaseModelMBean] Exception invoking method start
java.lang.NoClassDefFoundError: Could not initialize class javax.crypto.SunJCE_b

• When restarting JON agent, find errors similar to:

ERROR [RHQ Agent Registration Thread] (enterprise.communications.command.client.ClientCommandSenderTask)- {ClientCommandSenderTask.send-failed}Failed to send command [Command: type=[remotepojo]; cmd-in-response=[false]; config=[{rhq.agent-name=xxxxx, rhq.externalizable-strategy=AGENT, rhq.send-throttle=true}]; params=[{invocation=NameBasedInvocation[registerAgent], targetInterfaceName=org.rhq.core.clientapi.server.core.CoreServerService}]]. Cause: java.lang.Exception:java.lang.NoClassDefFoundError: Could not initialize class com.sun.crypto.provider.SunJCE -> java.lang.NoClassDefFoundError:Could not initialize class com.sun.crypto.provider.SunJCE. Cause: java.lang.Exception: java.lang.NoClassDefFoundError: Could not initialize class com.sun.crypto.provider.SunJCE