[Koha] Need help with Koha instance that refuses to do checkouts

Katrin Fischer katrin.fischer.83 at web.de
Tue Jun 22 07:59:35 NZST 2021

Hi Chris,

yes, it does. Documentation can be found here:


Hope this helps,


On 21.06.21 21:26, Chris Brown wrote:
> Hi James,
> Yes I did follow up Katrin's suggestion but found nothing that looked
> obviously wrong, and anyway I don't think there have been any configuration
> changes since well before the problem first showed up. Following another
> suggestion *we have cleared the browser caches on all our client machines
> and everything seems to be working again*. I have no idea why, and am not
> convinced that the problem isn't going to come back at some point. But all
> is well at the moment.
> Which leads me to a question I've been meaning to ask for a while ... *does
> Koha use cookies?*
> My thanks to all who suggested solutions. Much appreciated!
> Chris Brown (Voluntary Libraries in Sheffield)
> On Mon, Jun 21, 2021 at 10:46 AM Mason James <mtj at kohaaloha.com> wrote:
>> hi Chris
>> did you try Katrin's suggestion?, it is the most likely problem
>>     https://lists.katipo.co.nz/pipermail/koha/2021-June/056338.html
>> try loading your database into a test system, and experiment by removing
>> likely issuing rules until you find your problematic rule
>> cheers, Mason
>> On 21/06/21 6:42 pm, Chris Brown wrote:
>>> Dear Koha Community
>>> Following up my post on 12 June I am repeating my call for help as Koha
>> is
>>> effectively unusable right now at one of our libraries.
>>> We are running Koha 19.11 on Debian 9.11 (stretch). This supports 5 Koha
>>> instances for some of the volunteer-run libraries in Sheffield. It has
>> been
>>> stable and working fine for many months.
>>> Currently we have a serious problem with one of these instances. Any
>>> attempt to check out a book hangs (never completes) and we see
>>> /usr/share/koha/intranet/cgi-bin/circ/circulation.pl consuming most of
>> the
>>> CPU cycles (stuck in a loop perhaps?). On one occasion I noticed it was
>>> renew.pl consuming all the CPU.
>>> I have tried disabling plack for this instance, and have rebuilt the
>> zebra
>>> index, but the problem persists. There is nothing obvious reported in the
>>> log files, though I may not be looking in the right places. I cannot see
>>> any obvious problems with the configuration, though again I might be
>>> looking at the wrong things. The other 4 instances are working OK.
>>> *Any advice on how to debug or fix this would be greatly appreciated.*
>>> Does anyone know how to turn on tracing of MySQL transactions? I was
>>> wondering if looking at the activity at the database end might help.
>>> Thanks and Best Regards,
>>> Chris Brown (Voluntary Libraries in Sheffield)
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