There is currently an "active incident" with the 3 HPC systems that the UQ Research Computing Computing team runs for UQ and QCIF. The incident report describes it as follows:
The cluster monitoring is reporting a connectivity issue for compute nodes accessing the GPFS storage in the HPCs. This may prevent logins and could impact running jobs.
This may affect people attempting to use Awoonga, Flashlite or Tinaroo.
You can track the progress of the incident here:
UPDATE: 2018-05-11 - The problem has been resolved.