Hi Andrea and Enrico,

Thank you for providing an answer even if it was not what I was hoping to hear; 
it was the conclusion I'd reached myself.

Has this issue been considered given the official move from shapefile to 
geopackage as the default format?

My understanding was that shapefiles could be used over a network and whilst 
multiple people editing was dangerous it did not cause deadlocks.

Combined with the issues relating to MapInfo tab files over a network I've got 
into some hot water over my attempt to get QGIS rolled out in our organisation 
now. I'm going to have to think carefully about my next steps as it can be 
difficult to educate large numbers of staff and the two issues mean that people 
using QGIS incorrectly can cause pretty big issues.

To summarise,
 - You open a geopackage and save to the network; someone else comes along and 
opens it in their QGIS and everything looks okay until the PCs deadlock...ICT 
help calls and data corruption may occur.
 - You open a MapInfo tab file from the network and it looks fine (accept that 
it my draw in a user projection). MapInfo user receive errors but this is 
unknown to the QGIS user...ICT help calls result.

Whilst I'm glad the forums have helped to diagnose both behaviours I would 
personally say that the issues pose a bit of a threat to software adoption by 
larger companies and institutions that may be using Windows networks and 
potentially migrating from MapInfo.

In both cases my gut feel is that the best solution might be to look into use 
detection. If GDAL (I assume) can be improved to detect that either file type 
is already open then it might be possible to simply ban a second user from 
opening the file at the same time. This might frustrate some users but most 
importantly it would make the application safer from an ICT perspective.

These are of course just my personal opinion from my particular use case so 
please don't be offended by them if you disagree but I'd be really happy to 
hear how others are approaching the issues and/or opposing views?

Many thanks,
Paul

Message: 4
Date: Thu, 26 Sep 2019 11:10:45 +0200
From: Andrea Peri <[email protected]>
To: Enrico Fiore <[email protected]>
Cc: qgis-user <[email protected]>
Subject: Re: [Qgis-user] GeoPackage deadlocks
Message-ID:
        <cabqtjk-1hd9atuvhtiw81zw7xe_kpefut7bjcxxgsz0me56...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

Hi,
Geopackage is an Exchange format. Is not affordable in a multiuser data entry 
environment.
This require a dbms like postgres + postfis.

Regards,
Andrea.


Il gio 26 set 2019, 10:18 Enrico Fiore <[email protected]> ha scritto:

> Hi,
>
> Is anyone else getting occasional deadlocks when using GeoPackages in
> the Long Term Release of QGIS?
>
> We are using them over a Windows network so there are multiple users
> trying to access the same GeoPackage files. It all seems fine and two
> or more can open the file to look at but when someone edits it you
> sometimes hit a deadlock where none of the QGIS applications will shut down.
>
> I have the same issue and the same scenario. Multiple users that
> trying to access a the same GeoPackage file located in a server causes QGIS 
> deadlock.
>
> The issue rises also if no geopackage layer are in editing mode, but
> simply loaded in one QGIS view.
>
> There is a solution for this behaviour or is this a bug?
>
> Regards,
>
>
> Enrico
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