xdmp:shutdown

xdmp:shutdown(
   $hostIDs as xs:unsignedLong*,
   $reason as xs:string,
   [$failover as xs:boolean]
) as empty-sequence()

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((), "for software upgrade", fn:true())