invalid PID argument: --nofile=1048576:1048576 encountered at nfs-ganesha.service on 1 node when the whole cluster is rebooted

Issue

We sometimes encounter the following error at nfs-ganesha.service on 1 node when the whole cluster is rebooted at the same time:

prlimit: invalid PID argument: '--nofile=1048576:1048576'

● nfs-ganesha.service - NFS-Ganesha file server
   Loaded: loaded (/usr/lib/systemd/system/nfs-ganesha.service; enabled; vendor preset: disabled)
   Active: inactive (dead) since Mon 2018-03-26 07:35:42 EST; 6min ago
     Docs: http://github.com/nfs-ganesha/nfs-ganesha/wiki
  Process: 1503 ExecStop=/bin/dbus-send --system --dest=org.ganesha.nfsd --type=method_call /org/ganesha/nfsd/admin org.ganesha.nfsd.admin.shutdown (code=exited, status=0/SUCCESS)
  Process: 1489 ExecStartPost=/bin/bash -c prlimit --pid $MAINPID --nofile=$NOFILE:$NOFILE (code=exited, status=1/FAILURE)
  Process: 1445 ExecStart=/bin/bash -c ${NUMACTL} ${NUMAOPTS} /usr/bin/ganesha.nfsd ${OPTIONS} ${EPOCH} (code=exited, status=0/SUCCESS)

Mar 26 07:35:42 gluster01 systemd[1]: Starting NFS-Ganesha file server...
Mar 26 07:35:42 gluster01 bash[1489]: prlimit: invalid PID argument: '--nofile=1048576:1048576'
Mar 26 07:35:42 gluster01 systemd[1]: Started NFS-Ganesha file server.