The primary and backup ACTS servers that are used to synchronize the NIST Internet time servers to the atomic clock ensemble in Boulder failed on Wednesday 24 May at about 1900 UTC (1300 MDT). The failure affected 11 of the 35 NIST Internet time servers, and the time transmitted by the affected servers was wrong by up to 680 seconds. In most cases, the incorrect time was accompanied by the unhealthy indicator, but some of the systems transmitted the wrong time without this indication. The other 24 servers were not affected. In some cases, one of the physical servers at a site was affected while the others were not, so that repeated requests to the public site address resulted in time messages that differed by up to 680 seconds.
The ACTS servers have been fully repaired as of 27 May, 1800 UTC (1200 MDT), and all of the servers should be resynchronized within a few hours. There may be a transient error of up to 10 milliseconds during this period. I apologize for this failure, and I regret the problems and inconvenience that have resulted. Judah Levine jlev...@boulder.nist.gov _______________________________________________ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions