stops answering at same time every day

Sat Feb 26 13:49:46 UTC 2005

as a last resort you can manually shutdown bind at that particular time as
see if any batch process complains at the logs. also checking if dig
responds or not after restart would be a valuable test.
serdar

----- Original Message ----- 
From: "Allie M Hopkins" <allie at lsu.edu>
To: "Evan Xinos" <ex at bcapub.com>
Cc: <bind9-users at isc.org>
Sent: Saturday, February 26, 2005 12:30 AM
Subject: RE: stops answering at same time every day

>
>
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> No local queries work.  It's as if named isn't even running, but it is.
It
> receives all the queries and zone transfer requests, but just doesn't
> answer.
>
> Allie
>
>
> |---------+---------------------------->
> |         |           "Evan Xinos"     |
> |         |           <ex at bcapub.com>  |
> |         |                            |
> |         |           02/25/2005 09:55 |
> |         |           AM               |
> |---------+---------------------------->
>
>---------------------------------------------------------------------------
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>   |
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>   |       To:       "'Allie M Hopkins'" <allie at lsu.edu>
|
>   |       cc:
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>   |       Subject:  RE: stops answering at same time every day
|
>
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> Allie does the server respond to your local dig during this outage time?
> Could it be some sort of firewall policy on the network somewhere?
>
>
>
>
>
> __________________________________
> Evan Xinos
> System Support Analyst
> BCA Publications
> (514)499-9550 ext 222
> mailto:evan at bcaresearch.com
> http://www.bcaresearch.com
> __________________________________
>
>
> -----Original Message-----
> From: bind-users-bounce at isc.org [mailto:bind-users-bounce at isc.org] On
> Behalf Of Allie M Hopkins
> Sent: Friday, February 25, 2005 9:57 AM
> To: Allie M Hopkins
> Cc: bind-users-bounce at isc.org; bind9-users at isc.org
> Subject: Re: stops answering at same time every day
>
>
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>
> I turned on query logging last night and nothing seems out of the
ordinary.
> Only one server stopped responding this time, but it was our master so all
> zone transfers are stopped for the same amount of time.  The CPU
> utilization was low, no crazy connections, no different processes running.
> I'm truly stumped.
>
>
> Doesn't anyone have any advice or suggestions?
>
>
> I can log into the machine remotely during this downtime and do anything
> else as usual.  The only thing different is the name server stops
> responding to all types of requests.  What could possibly cause this at
> such a regular interval?
>
>
> Many departments take internet based tests in the afternoon, so this is
> really affecting many people.  I'm just out of ideas.  Tonight I will have
> a sniff going on the servers to see if there is something else I'm
missing.
>
>
> I'm begging for suggestions.  I've been troubleshooting for weeks.
>
>
> Allie
>
>
>
>
>
> |---------+---------------------------->
> |         |           Allie M Hopkins  |
> |         |           <allie at lsu.edu>  |
> |         |           Sent by:         |
> |         |           bind-users-bounce|
> |         |           @isc.org         |
> |         |                            |
> |         |                            |
> |         |           02/24/2005 08:39 |
> |         |           AM               |
> |---------+---------------------------->
>
>
>---------------------------------------------------------------------------
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>
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>   |
> |
>
>
>   |       To:       bind9-users at isc.org
> |
>
>
>   |       cc:       (bcc: Allie M Hopkins/allie/LSU)
> |
>
>
>   |       Subject:  stops answering at same time every day
> |
>
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>
>---------------------------------------------------------------------------
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>
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> All three of our nameservers - two running 9.3.0 and one running 9.2.3 -
> stop answering at the same time every afternoon.  Not all three everyday -
> sometimes just one, sometimes two, sometimes all three, but always at
> 6:30pm for 10-15 minutes.  My first thought was that a script or other os
> application was stopping the service from answering but I've been running
> logs and nothing points to anything peculiar.  No crontabs, no extra
> processes running.
>
>
>
>
>
> I'm going to turn on query logging during this interval to see what the
> clients are doing, perhaps something is hosing the servers making it
unable
> to respond.  I know about the cleaning interval, but I thought the default
> was 60 minutes.  I don't have this option set anywhere to change the
> default.  I just can't seem to figure it out.  No weird connections at
this
> time either, according to netstat.
>
>
> Anyone have any ideas???  I'm running AIX 4.3.3.  What other logs can I
> turn on to get a better handle on the situation?
>
>
> MRTG is graphing the traffic load.  You can see the dips on the servers:
> http://kahuna.net.lsu.edu/mrtg/dns.html
>
>
> Allie M Hopkins
>
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