FreeBSD 6.2-REL, system lockup, recovers when keyboard pressed

Dale Shaw at
Thu Mar 13 02:52:20 UTC 2008

Hi again all,

Just an update on my problem (see below).

I upgraded the box to 6.3-REL and the problem persisted -- exactly the
same behaviour.

I've narrowed the problem down to nfdump though -- without the NetFlow
collectors (nfcapd) running, the box is rock solid.

If anyone out there happens to have seen this problem (with nfdump and
friends) before, or has some general advice for troubleshooting
something like this (I suspect some system resource tuning may be
required), please drop me a line.

In the meantime, I'll head on over to the nfdump list.


>  On Thu, Feb 28, 2008 at 10:57 PM, Kris Kennaway <kris at> wrote:
>  >
>  > Dale Shaw wrote:
>  >  > Hi all,
>  >  >
>  [...]
>  >  > I have a vanilla 6.2-RELEASE system running a bunch of network
>  >  > management type tools like RANCID, nfcapd, cacti and so on.
>  >  >
>  >  > After a few days of normal operation, the system (locked away in a
>  >  > data centre) falls off the network. Can't SSH to it, can't ping it. No
>  >  > ARP -- gone! I have no OOB access to this machine (it's a test
>  >  > box/play pen).
>  >
>  >  I have a vague memory of something like this but cannot point to a
>  >  specific commit that resolved it.
>  >
>  >  Kris

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