Error message suggests there are some mbeam from the server trying to bind on the same port the other domain (server) is already working.
As both domains shares the host and they are working in a cluster, I strongly suggest to have one DAS managing both domains and standalone instances.
This suggestion, will make available more memory for the runtime system, as 2 JVMs (node management and DAS) will not be running.
Claudio Miranda
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