Is it possible the two boxes are talking to two different servers?
-----Original Message----- From: owner-scientific-linux-us...@listserv.fnal.gov [mailto:owner-scientific-linux-us...@listserv.fnal.gov] On Behalf Of Stephen Isard Sent: Wednesday, October 18, 2017 2:47 PM To: scientific-linux-us...@listserv.fnal.gov Subject: clock skew too great ** EXTERNAL ** Hello, I have two laptops side by side, one running SL6, the other SL7, both up to date. According to the date command, their times agree to within a small fraction of a second. On both machines, I normally run kinit to get a kerberos ticket in the same realm. Today, the SL7 machine gets its ticket normally, but the SL6 one shows an error message "Clock skew too great while getting initial credentials". Since the clocks of the two machines appear to agree, I would have expected that either both should produce the error or neither. From what I have read on the web, the standard tolerance for clock skew is 5 minutes, and the agreement between the times on the two machines is well within that. Both machines have ntpd running, using the time servers [0-3].rhel.pool.ntp.org. Powering off the SL6 machine and rebooting does not restore sanity. The problem just arose today. There have been no system updates on the SL6 machine since it successfully got its ticket yesterday. Any suggestions for what to try? Stephen Isard *** This email is from an EXTERNAL sender *** Use caution before responding. DO NOT open attachments or click links from unknown senders or unexpected email. If this email appears to be sent from a Platte River Power Authority employee or department, verify its authenticity before acting or responding. Contact the IT Help Desk with any questions.
