After applying SP6 to our two nodes one of them restarts on it's own without
a trace in the abend.log
ProLiant Log Manager reports:

"At least one of the nodes is Alive in the old master's node partition.
This node is NOT in the old master's node partition." Running Process:

ASR Lockup Detected: Code executing in module CIOS.NLM v1.60 at offset
+8B44h when ASR NMI occured.