[Koha-devel] Serious problem

[David Cook]

Glad to see someone else looking at this bug. We had this happen just the
other day. 

Mark, I think the reset of auto_increment also happens after OPTIMIZE TABLE,
if I recall correctly. Very annoying...

Owen, you create a new entry in issues which gets an auto_id of 500. That
bumps up the auto_increment to 501. However, if you move that entry into
old_issues - with an id of 500 - then restart the MySQL server (it seems) or
run OPTIMIZE TABLE issues, the auto_increment for issues is reset to 500.
You try to check in that check out, and you get a software error, because
there's already an entry with a primary key of 500 in the old_issues table.

Not only is there a loss of history, but I'm pretty sure that newer issue
stays in the issues table, because it can't be moved, and that'll likely
have all sorts of flow on effects.

Fun times!

I noticed this happening for reserves as well last year or the year before I
think. We've tried to mitigate it locally, since I don't really see a way of
fixing this issue with the current Koha methodology of using
deletedtables...

David Cook
Systems Librarian
Prosentient Systems
72/330 Wattle St
Ultimo, NSW 2007
Australia

Office: 02 9212 0899
Direct: 02 8005 0595


> -----Original Message-----
> From: koha-devel-bounces at lists.koha-community.org [mailto:koha-devel-
> bounces at lists.koha-community.org] On Behalf Of Mark Tompsett
> Sent: Wednesday, 31 August 2016 11:42 PM
> To: Owen Leonard <oleonard at myacpl.org>
> Cc: Koha-devel <koha-devel at lists.koha-community.org>
> Subject: Re: [Koha-devel] Serious problem
> 
> Greetings,
> 
> >> check out, check in, restart mysql server, check out, check in...
> >> old_issues bug!
> 
> > What exactly is the bug?
> 
> Loss of history.
> Unless you do this after the server restart:
> use koha_library;
> insert into issues (borrowernumber) values (1);
> -- this will fill the gap, and should restore it.
> actually, whatever the mysql is to set the auto_increment to
> max(issue_id)+1 from old_issues would work too.
> 
> GPML,
> Mark Tompsett
> 
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