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

Carlos Lopez clopez at dml.vic.edu.au
Mon Jun 21 18:54:54 NZST 2021

Hi Chris

I don't know whether this will help (the details don't exactly match) but there was a bug posted last year (https://www.mail-archive.com/search?l=koha-bugs@lists.koha-community.org&q=subject:%22%5C%5BKoha%5C-bugs%5C%5D+%5C%5BBug+23690%5C%5D+During+checkout%2C+window+hangs+with+a+pop+up+%5C%22Loading...you+may+continue+scanning.%5C%22%22&o=newest&f=1) that made the checkout window hang with a pop up window "Loading ... you may continue scanning" - does this sound like your problem?

With kind regards from the Dalton McCaughey Library Team

Carlos Lopez

Dalton McCaughey Library | 29 College Crescent, Parkville, VICTORIA 3052
Ph: 03 9340 8888 ext.1 | library at dml.vic.edu.au | library.dmlibrary.org.au 

-----Original Message-----
From: Koha <koha-bounces at lists.katipo.co.nz> On Behalf Of Chris Brown
Sent: Monday, 21 June 2021 4:42 PM
To: koha <koha at lists.katipo.co.nz>
Subject: [Koha] Need help with Koha instance that refuses to do checkouts

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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