> -----Original Message----- > From: Akemi Yagi > Sent: Thursday, January 15, 2015 12:05 > > On Thu, Jan 15, 2015 at 8:43 AM, G Galitz <geoff at galitz.org> wrote: > > > > Hi. > > > > We have another leap second coming. Have past bugs with > Centos and leap > > seconds (specifically high CPU spikes) been resolved? > Should we be worried? > > Apparently Red Hat is well aware of the upcoming leap second: > > https://access.redhat.com/solutions/1317263 > > Unfortunately all the related bugzilla reports are private so we > cannot see the status. It seems to boil down to: https://bugzilla.redhat.com/show_bug.cgi?id=479765 which is closed fixed. The private bugs are "pay attention" tickets, but some do reference KB Article "Leap Seconds in Red Hat Enterprise Linux". A summary of Leap Seconds in Red Hat Enterprise Linux - https://access.redhat.com/articles/15145 Issue: 6 different ways of saying "Will my system work?" . Environment: EL 4-7 Resolution: For EL6 see: * https://access.redhat.com/knowledge/solutions/154713 * https://access.redhat.com/knowledge/solutions/154793 * https://access.redhat.com/knowledge/solutions/173693 * https://access.redhat.com/knowledge/articles/199563 Otherwise if you run NTP resolution A else B Resolution A: NTP logging may crash EL 4/5, update your system. EL4 see http://rhn.redhat.com/errata/RHSA-2009-1024.html EL5 see http://rhn.redhat.com/errata/RHSA-2009-1243.html EL6/7 not affected, but EL6 see https://access.redhat.com/site/solutions/154793 CPU usage sucks after leap second* [*:side bar: see http://rhn.redhat.com/errata/RHBA-2012-1199.html for the patch or do something like "date $(date +someformatthatworks)"] PPC and IA64 arches will self destruct and should not use NTP Resolution B: Your time will be wrong and you should be happy. A new tzdata will come out see bugs: EL4: https://bugzilla.redhat.com/show_bug.cgi?id=1181975 EL5: https://bugzilla.redhat.com/show_bug.cgi?id=1181933 EL6: https://bugzilla.redhat.com/show_bug.cgi?id=1180536 EL7: https://bugzilla.redhat.com/show_bug.cgi?id=1181970 Root Cause: https://what-if.xkcd.com/26/ -- -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- - - - Jason Pyeron PD Inc. http://www.pdinc.us - - Principal Consultant 10 West 24th Street #100 - - +1 (443) 269-1555 x333 Baltimore, Maryland 21218 - - - -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- This message is copyright PD Inc, subject to license 20080407P00.