[rancid] prefix-list random order bug

[Alan McKinnon]

On 15/12/2014 21:08, Christopher J. Umina wrote:
> Sorry, I should have clarified,
> 
> I'm using the 100% default rancid.conf (except LIST_OF_GROUPS, of
> course), so ACLSORT is disabled.
> 
>     # uname -a
>     FreeBSD test.box 10.1-RELEASE FreeBSD 10.1-RELEASE #0 r274401: Tue
>     Nov 11 21:02:49 UTC 2014    
>     root at releng1.nyi.freebsd.org:/usr/obj/usr/src/sys/GENERIC  amd64
>     # pkg info perl\* rancid\*
>     perl5-5.18.4_10
>     rancid3-3.1_1
> 
> 
> This issue didn't occur until I upgraded to FreeBSD 10.1 and all
> packages were upgraded.  Not sure what the original version of Perl was,
> but I have a feeling that's what broke things.


You might be right. Somewhere around perl 5.14 or 5.16 the
implementation of associative arrays (hashes) was changed. The order of
keys for a given hash were randomly distributed but consistent from one
run to the next. The change made keys always come out in a random order.
I had to fix a few in-house apps at the time.

It's possible your version of rancid relies on the old behaviour. I
don't have a working install handy to investigate, but thought it worth
mentioning.





> 
> Anything I can do to help here?
> 
> 
> On Mon, Dec 15, 2014 at 2:02 PM, heasley <heas at shrubbery.net
> <mailto:heas at shrubbery.net>> wrote:
> 
>     Mon, Dec 15, 2014 at 04:48:57PM +0200, Alan McKinnon:
>     > On 15/12/2014 15:19, Christopher J. Umina wrote:
>     > > Hi,
>     > >
>     > > Excuse me if somebody's solved this already, but I'm running into the
>     > > same issue as described here:
>     > >
>     > > http://www.shrubbery.net/pipermail/rancid-discuss/2014-May/007630.html
>     > >
>     > > Has this been fixed?
>     >
>     > If that's the one I think it is, I needed to do quite a few fixes to ACL
>     > handling - Cisco changed something in the output format in some OSes.
>     >
>     > The most common error is that the ACL ordering is still technically
>     > correct, but the exact sequence is somewhat random because rancid can't
>     > find the exact fields to sort on.
>     >
>     > Patches exist, search the archives for threads where I posted,
>     > especially threads I started. If you are running 2.3.8, try upgrading to
>     > the latest point version (heasley may have applied the patches). If not,
>     > apply them manually (they apply cleanly). I have changed jobs in the
>     > interim and no longer have access to my patches there, but a well-worded
>     > Google search will find them for you.
> 
>     there are problems with sorting v6; which I nearly have corrected. 
>     there is
>     a bug remaining, but i've had time due to travel.  until that is
>     available in
>     3.2, sorting can be disabled in rancid.conf.
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> 
> 
> 
> -- 
> Christopher J. Umina
> chris at uminac.com <mailto:chris at uminac.com>
> 781 354 0535


-- 
Alan McKinnon
alan.mckinnon at gmail.com