Because when the kernel crashes, logging crashes along with it. If your kernel isn't working, none of your sub programs work.
Kind of like a blue screen of death. On Mar 3, 2017 6:27 AM, "Brough Turner via Mikrotik-users" < [email protected]> wrote: > Clearly there was a kernel failure. But the watchdog didn't timeout, as > that would have taken several minutes and the whole outage was no more than > 30 seconds. I'm guessing the thread that recognizes a kernel crash links > directly to the same reboot code that's used by a watchdog timeout. > > Separately, I still don't understand why we saw none of the several dozen > log entries that our standard configuration generates upon a watchdog timer > reboot (or any reboot). > > Thanks, > Brough > > Brough Turner > netBlazr Inc. – Free your Broadband! > Mobile: 617-285-0433 <(617)%20285-0433> Skype: brough > netBlazr Inc. <http://www.netblazr.com/> | Google+ > <https://plus.google.com/102447512447094746687/posts?hl=en> | Twitter > <https://twitter.com/#%21/brough> | LinkedIn > <http://www.linkedin.com/in/broughturner> | Facebook > <http://www.facebook.com/brough.turner> | Blog > <http://blogs.broughturner.com/> | Personal website > <http://broughturner.com/> > > > > On Thu, Mar 2, 2017 at 5:57 PM, Judd Dare <[email protected]> wrote: > >> This was a hard crash due to a kernel failure and the watchdog caught >> it. Power was probably fine, just a bug somewhere that caused the kernel >> to crash. I'd take this opportunity to think about upgrading to another >> version which may have that crash fixed. >> >> Judd >> >> On Thu, Mar 2, 2017 at 1:13 PM, Brough Turner via Mikrotik-users < >> [email protected]> wrote: >> >>> It was not a power outage and the OSPF issues are minor (coming from a >>> separate problem). >>> >>> But your suggestion of a terminal window is a good one! >>> >>> There are two messages. I suspect the first is true and the second one >>> is anomaly that goes along with the lack of any startup log messages. >>> >>> >>> This is the first time I've seen a kernel failure out of 7 CCRS >>> operating for 6 to 14 months. >>> >>> >>> Thanks, >>> Brough >>> >>> Brough Turner >>> netBlazr Inc. – Free your Broadband! >>> Mobile: 617-285-0433 <(617)%20285-0433> Skype: brough >>> netBlazr Inc. <http://www.netblazr.com/> | Google+ >>> <https://plus.google.com/102447512447094746687/posts?hl=en> | Twitter >>> <https://twitter.com/#%21/brough> | LinkedIn >>> <http://www.linkedin.com/in/broughturner> | Facebook >>> <http://www.facebook.com/brough.turner> | Blog >>> <http://blogs.broughturner.com/> | Personal website >>> <http://broughturner.com/> >>> >>> >>> >>> On Thu, Mar 2, 2017 at 2:51 PM, Scott Reed <[email protected]> >>> wrote: >>> >>>> Open a terminal window. If it was a power outage, under the banner it >>>> will say something like reboot without proper shutdown. >>>> >>>> Also, the very beginning of the log after power up may have some help. >>>> >>>> The part you are showing looks like OSPF getting started. >>>> >>>> On 3/2/2017 2:11 PM, Brough Turner via Mikrotik-users wrote: >>>> >>>> At 12:24 today, one of our core routers appears to have had a brief >>>> outage. It's upstream of our monitoring server so initially everything >>>> looked like a disaster, but upon further examination, the outage lasted >>>> less than 30 seconds and the 11 VPN sessions at the monitoring server were >>>> all back up in less than 37 seconds. Looking at the monitoring server and >>>> each of the devices upstream of the monitoring server, all had uptimes of >>>> >143 days, except the gateway router, a CCR1036. >>>> >>>> Strangely, the uptime on the CCR1036 suggests it rebooted at 12:24 >>>> today, but there is nothing in its log. How can we have a 30 second >>>> service outage and have the router's uptime reset with no log entries? On >>>> a router reboot, we normally have dozens of log entries before the router >>>> is up, has the correct time and is behaving normally. >>>> >>>> Here's a Winbox view of date, time, uptime and the log. Any ideas? Am >>>> I missing something obvious? >>>> >>>> >>>> >>>> >>>> Thanks, >>>> Brough >>>> >>>> Brough Turner >>>> netBlazr Inc. – Free your Broadband! >>>> Mobile: 617-285-0433 <(617)%20285-0433> Skype: brough >>>> netBlazr Inc. <http://www.netblazr.com/> | Google+ >>>> <https://plus.google.com/102447512447094746687/posts?hl=en> | Twitter >>>> <https://twitter.com/#%21/brough> | LinkedIn >>>> <http://www.linkedin.com/in/broughturner> | Facebook >>>> <http://www.facebook.com/brough.turner> | Blog >>>> <http://blogs.broughturner.com/> | Personal website >>>> <http://broughturner.com/> >>>> >>>> >>>> >>>> >>>> _______________________________________________ >>>> Mikrotik-users mailing >>>> [email protected]http://lists.wispa.org/mailman/listinfo/mikrotik-users >>>> >>>> >>>> >>> >>> _______________________________________________ >>> Mikrotik-users mailing list >>> [email protected] >>> http://lists.wispa.org/mailman/listinfo/mikrotik-users >>> >>> >> > > _______________________________________________ > Mikrotik-users mailing list > [email protected] > http://lists.wispa.org/mailman/listinfo/mikrotik-users > >
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