Load average climbs to an abnormally high level when a user's kerberos credentials expire

Issue

• Customer has a monitoring tool that logs in and does (among other things) an lsof using the 'appuser' login id.
• If the 'appuser' login has an expired kerberos ticket then the lsof will hang when it tries to access a kerberized nfs mount.
• The hang will last until the expired ticket is destroyed or a ticket is obtained.
• These lsof processes will stack up and result in the high load average.