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Groups > linux.debian.user > #201697

Re: Heck, why did the server freeze?

From Alessandro Vesely <vesely@tana.it>
Newsgroups linux.debian.user
Subject Re: Heck, why did the server freeze?
Date 2018-10-26 19:40 +0200
Message-ID <wNefw-6Js-3@gated-at.bofh.it> (permalink)
References <wMS5k-1PA-15@gated-at.bofh.it> <wMSI1-2hB-1@gated-at.bofh.it> <wN6Bj-2fr-1@gated-at.bofh.it> <wN6Bk-2fr-7@gated-at.bofh.it>
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On Fri 26/Oct/2018 11:27:36 +0200 Reco wrote:
> On Fri, Oct 26, 2018 at 11:23:39AM +0200, Alessandro Vesely wrote:
>> The problem is that the server froze.  I don't think that's what it is supposed
>> to do when a card fails.
> 
> It's my impression too.

In general, it is too difficult to know if a link is good, at least on the
local side.  I found nothing better than running pings by cron.


>> Contrast that with log lines about anything else, from non-redundant power
>> supplies to failed GPG signatures.  In part, the missing precise diagnosis must
>> be a shortcoming on part of the card vendor.  However, how come the kernel
>> didn't realize that the link had to go down, log something, and just fail any
>> subsequent call on that interface, instead of freezing?  Or did it freeze for
>> an unrelated reason?
> 
> I believe that it's impossible to answer this question. It's highly
> likely that it was kernel panic. Whenever it was related to failed NIC,
> or no - it's impossible to tell since there's no kernel backtrace.

Right.  I should have tried Ctrl-Alt-F1 or some of the SysRq hacks[*], but I
was too upset by services not responding...

[*] https://www.kernel.org/doc/html/latest/admin-guide/sysrq.html


> I'd install, say, kdump-tools for the future incidents like this.

Just installed, thank you!  (I'll reboot when the new card arrives).

Best
Ale
-- 

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Thread

Heck, why did the server freeze? Alessandro Vesely <vesely@tana.it> - 2018-10-25 20:00 +0200
  Re: Heck, why did the server freeze? Brian <ad44@cityscape.co.uk> - 2018-10-25 20:40 +0200
    Re: Heck, why did the server freeze? Alessandro Vesely <vesely@tana.it> - 2018-10-26 11:30 +0200
      Re: Heck, why did the server freeze? Reco <recoverym4n@enotuniq.net> - 2018-10-26 11:30 +0200
        Re: Heck, why did the server freeze? Joe <joe@jretrading.com> - 2018-10-26 18:10 +0200
        Re: Heck, why did the server freeze? Alessandro Vesely <vesely@tana.it> - 2018-10-26 19:40 +0200
          Re: Heck, why did the server freeze? Reco <recoverym4n@enotuniq.net> - 2018-10-26 20:20 +0200

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