Don't allocate nodes to a job step until it is responding (as before) AND
  the node is no longer in power save mode.

    "man slurm.conf" (SuspendProgram and related parameters) for more 
    information.
NOTE: the step create logic needs to be modify to return EAGAIN or the 
    like until the node's state NOT_RESPONDING flag gets cleared.

    longer needed.

See NEWS for identification of all changes

    ping the node immediately to clear the NOT_RESPONDING flag.

    expression rather than one line per node. Frequency of log messages is 
    dependent upon SlurmctldDebug value from 300 seconds at SlurmctldDebug<=3
    to 1 second at SlurmctldDebug>=5.

  respect to SlurmdTimeout parameter.

Also call ping_nodes even when SlurmdTimeout=0 so that
non-responsive nodes can be returned to service.

    the node to be returned to use when it starts responding rather than 
    remaining in a non-usable state.