Maintained by: NLnet Labs

[Unbound-users] looping module stopped

W.C.A. Wijngaards
Tue Sep 14 10:25:40 CEST 2010


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Hi Gareth,

If the 262 nameservers all timeout, and they get 4 tries each, it hits
the 1000 limit of course.

I'll have to increase that limit ...

Best regards,
   Wouter

On 09/14/2010 10:16 AM, Gareth Hopkins wrote:
> I've just seen the following regarding the _tcp.slb.com
> <http://tcp.slb.com> zonefile. 
> 
> There are 262 nameserver specified. Unbound should not have any issues
> with that right ? 
> 
> See attached. 
> 
> Cheers, 
> 
> Gareth 
> 
> On Tue, Sep 14, 2010 at 9:10 AM, Gareth Hopkins <gabbawp at gmail.com
> <mailto:gabbawp at gmail.com>> wrote:
> 
>     Hi Wouter, 
> 
>     Thanks for the reply. 
> 
>     I'll enable logging on one of my dev boxes and see if I get the same
>     errors. 
> 
>     Latest from the production box 
> 
>     Sep 13 18:59:05 unbound[96721:0] error: internal error: looping
>     module stopped
>     Sep 13 18:59:05 unbound[96721:0] info: pass error for qstate
>     <_sipinternal._tcp.slb.com <http://tcp.slb.com>. SRV IN>
>     Sep 13 19:44:01 unbound[96721:0] error: internal error: looping
>     module stopped
>     Sep 13 19:44:01 unbound[96721:0] info: pass error for qstate
>     <_sipinternaltls._tcp.slb.com <http://tcp.slb.com>. SRV IN>
>     Sep 13 20:31:11 unbound[96721:0] error: internal error: looping
>     module stopped
>     Sep 13 20:31:11 unbound[96721:0] info: pass error for qstate
>     <_sipinternal._tcp.slb.com <http://tcp.slb.com>. SRV IN>
>     Sep 13 20:48:15 unbound[96721:0] error: internal error: looping
>     module stopped
>     Sep 13 20:48:15 unbound[96721:0] info: pass error for qstate
>     <_sipinternaltls._tcp.slb.com <http://tcp.slb.com>. SRV IN>
>     Sep 13 22:07:07 unbound[96721:0] error: internal error: looping
>     module stopped
>     Sep 13 22:07:07 unbound[96721:0] info: pass error for qstate
>     <_sipinternaltls._tcp.slb.com <http://tcp.slb.com>. SRV IN>
>     Sep 14 06:35:03 unbound[96721:0] error: internal error: looping
>     module stopped
>     Sep 14 06:35:03 unbound[96721:0] info: pass error for qstate
>     <_sipinternaltls._tcp.slb.com <http://tcp.slb.com>. SRV IN>
>     Sep 14 07:04:02 unbound[96721:0] error: internal error: looping
>     module stopped
>     Sep 14 07:04:02 unbound[96721:0] info: pass error for qstate
>     <_sipinternaltls._tcp.slb.com <http://tcp.slb.com>. SRV IN>
>     Sep 14 07:24:37 unbound[96721:0] error: internal error: looping
>     module stopped
>     Sep 14 07:24:37 unbound[96721:0] info: pass error for qstate
>     <_sipinternaltls._tcp.slb.com <http://tcp.slb.com>. SRV IN>
> 
>     Cheers, 
> 
>     Gareth 
> 
>     On Fri, Sep 10, 2010 at 11:51 AM, W.C.A. Wijngaards
>     <wouter at nlnetlabs.nl <mailto:wouter at nlnetlabs.nl>> wrote:
> 
> Hi Gareth,
> 
> This error means that a module was activated 1000 times (or so),
> which
> is impossible or unusual, and should not happen.  The query got
> SERVFAIL, and it prints this log message.
> 
> This should not be happening, usually, lookups fail much earlier.
> My quick try says that the name is an NXDOMAIN.  And works fine
> for me.
>  So SERVFAIL instead of NXDOMAIN is no great loss (for the
> users), the
> failsafe activated and nothing bad happened.
> 
> So, the question is why is it looping (the state machine is
> activated
> too often)?
> 
> I would like to see a high verbosity trace of a resolution of
> this name
> when it says it is looping; what is that module doing?
> 
> Best regards,
>   Wouter
> 
> On 09/10/2010 09:59 AM, Gareth Hopkins wrote:
>> Hi,
> 
>> I'm seeing the following in my unbound logs
>> Sep 09 23:53:20 unbound[96721:0] error: internal error:
> looping module
>> stopped
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