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Emergency Security Patching of RCAC Clusters

Due to a recent security vulnerability, the Carter, Halstead, Hammer, Radon, Rice, Scholar, and Snyder clusters will have their operating system upgraded to a newer version during February 2, 2017 5:00pm - March 2, 2017 5:00pm EST. Unlike other cluster downtimes, this upgrading process will follow a "rolling reboot" strategy, that is, nodes will be updated and rebooted when jobs currently running on them complete.

Potential impact on users:

  • Currently running batch jobs will NOT be impacted.
  • For each front-end server, users will be given a 48-hour notice to save their work and exit from any currently running interactive jobs. Interactive jobs still running at the time of reboot will be terminated.
  • Users may experience slightly longer scheduling delays during initial hours of the updating process.

Originally posted: