project_key: JBEPP

In jboss-service.xml under core-management, there is a mbean definition

<mbean
     code="org.jboss.varia.scheduler.Scheduler"
     name="portal:service=Management,type=Scheduler">
     <attribute
        name="SchedulableMBean">portal:service=Management,type=PortletDiscoveryManagement,name=Default</attribute>
     <attribute name="SchedulableMBeanMethod">processPortletDiscovery()</attribute>
     <attribute name="InitialStartDate">NOW</attribute>
     <attribute name="SchedulePeriod">30000</attribute>
     <attribute name="InitialRepetitions">-1</attribute>
     <attribute name="StartAtStartup">true</attribute>
  </mbean> 

This needs to be turned off.  As per http://www.redhat.com/docs/manuals/jboss/jboss-eap-4.2/doc/Server_Configuration_Guide/Scheduling_Tasks-org.jboss.varia.scheduler.Scheduler_.html, simply setting the flag to false for "StartAtStartup" should do the job.