MarkLogic Server 11.0 Product Documentation
xdmp.shutdown

xdmp.shutdown(
   hostIDs as (Number|String)[],
   reason as String,
   [failover as Boolean]
) as null

Shutdown servers on hosts.

Parameters
hostIDs	A sequence of host IDs, or empty sequence for the local host.
reason	Prepositional phrase describing the reason to shutdown.
failover	True if other hosts in the cluster should take over the replica forests. False if not specified.

http://marklogic.com/xdmp/privileges/xdmp-shutdown

xdmp.shutdown(null, "for software upgrade", true);

MarkLogic Server 11.0 Product Documentationxdmp.shutdown