Hung server

Polytropon freebsd at
Thu Feb 9 23:48:01 UTC 2017

On Thu, 9 Feb 2017 16:21:50 -0700, The Doctor wrote:
> Question?  I s there a way of detecting why a server 
> hangs?

Can you be more specific?

> Within the last month my  Primary Server
> has been going into infinity mood as like to
> call it for about 2 hours at a time.
> No signal can get through.

So you're observing the "networking aspect" of that server?
Do you have a non-network connection (direct console, serial
line, IPMI or something like that) that you can examine?

> Is this a kernel or app issue?

Could be even more, for example a firewall issue. A system
completely hanging often indicates a lower level problem,
for example related to the kernel or a device driver, but
without proper diagnostics, it's really hard to tell. As I
said, if everything you can observe happens on the "network
aspect", it could as well be a firewall (of the server, or
_infront of_ the server) that just blocks traffic while the
programs the server runs keep working as intended...

Magdeburg, Germany
Happy FreeBSD user since 4.0
Andra moi ennepe, Mousa, ...

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