Soft Power Control Failures

If the scyld-nodectl reboot or shutdown commands always fall back on hard power control, the shutdown process on the compute node may be taking too long. When this happens the scyld-nodectl reboot or shutdown commands will pause for several seconds waiting for the soft power change to take place before falling back to direct power control through the power_uri. A common cause for this is a network file system that is slow to unmount. The cluster administrator should address the problem delaying shutdown, but if it is unavoidable, then the reboot and shutdown commands accept options to adjust the timeout (--timeout <seconds>), or you can specify to use only the soft reboot (--soft) without falling back to direct power control.