Sometime in the Dec 10th through Jan 7th timeframe a timing bug has been introduced to 11.x/head/-current. With HZ=1000 (the default for bare metal, not for a vm); the clocks stop just after 24 days of uptime. This means things like cron, sleep, timeouts etc stop working. TCP/IP won't time out or retransmit, etc etc. It can get ugly.
The problem is NOT in 10.x/-stable. We hit this in the freebsd.org cluster, the builds that we used are: FreeBSD 11.0-CURRENT #0 r275684: Wed Dec 10 20:38:43 UTC 2014 - fine FreeBSD 11.0-CURRENT #0 r276779: Wed Jan 7 18:47:09 UTC 2015 - broken If you are running -current in a situation where it'll accumulate uptime, you may want to take precautions. A reboot prior to 24 days uptime (as horrible a workaround as that is) will avoid it. Yes, this is being worked on. -- Peter Wemm - pe...@wemm.org; pe...@freebsd.org; pe...@yahoo-inc.com; KI6FJV UTF-8: for when a ' or ... just won\342\200\231t do\342\200\246
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