helium-1.hpc.uiowa.edu rebooted due to errant processes

One of the Helium login nodes (helium-1.hpc.uiowa.edu) ran out of memory due to user processes running on it. The node became unresponsive and had to be power cycled. The problems started around 5:15 PM on 11/27/2012 and the machine was rebooted around 9:15 PM on 11/27/2012.