We have written a custom web app to allow server owners to take their own rservers in and out of service for maintenance. On all of our ACE's this appears to work (querying the ACE with a "sho rservers" to get the rservers and their current status). When we run this one ACE, we get the following XML response.
System memory is too low, xml_agnt is not available.
This is running Version A2(2.4) [build 3.0(0)A2(2.4)]
It has been up for 317 days
If anybody has experienced this same issue, please respond.