MOC_UnkIbmNurs=ARFM4111I: Generational garbage collection is in use in an IBM JRE, but the nursery size limit is not known exactly; assuming {0} kilobytes.
Explanation
The autonomic memory overload protection controller is unable to determine the nursery size limit.
User response
Either accept the assumed value, set the maxNonFullGcMemoryRelease custom property on the cluster, or use a non-generational collector.