[Sugar-devel] known issues with collaboration in XS 0.5.2

[Tomeu Vizoso]

On Mon, Sep 6, 2010 at 10:27, Tomeu Vizoso <tomeu at sugarlabs.org> wrote:
> On Fri, Sep 3, 2010 at 19:48, Martin Langhoff <martin at laptop.org> wrote:
>> On Fri, Sep 3, 2010 at 12:43 PM, Tomeu Vizoso <tomeu at sugarlabs.org> wrote:
>>> I have a local XS 0.6 that is working fine but I'm finding that the XS
>>> 0.5.2 at jabber.sugarlabs.org is not returning some results for some
>>> of the queries that I make.
>>
>> There are very important bugfixes in the "final" ejabberd that is in
>> olpcxs-testing repo for xs-0.6
>>
>> I should release a 0.6.1 with the contents of olpcxs-testing, but
>> things haven't been kind to me lately.
>>
>> You aren't telling us exactly what problems you saw on the old
>> ejabberd.
>
> I'm noticing that the server never replies to some PEP queries about
> buddyinfo and activity properties. The symptom on the Sugar side is
> that the DBus calls timeout.

Actually, it eventually replies, it's just that it takes veeery long sometimes.

With the script attached, some GetProperties queries take a few
seconds, others more than 25 seconds (the default dbus timeout). It
should be invoked like this: dbus-launch --exit-with-session python
gabble_test.py

There are presently 2573 registered users and the ejabberd version is
ejabberd-xs-2.0.3-11.fc9.olpc.i386 , which is the last one I see in
http://fedora.laptop.org/xs/testing/olpc/9/i386/

Martin, does it match your experience that, when there are several
hundreds of registered users, PEP queries could take so much CPU?
During each query, the process 'beam' was taking 100% CPU. Postgres
didn't appeared in top.

Thanks,

Tomeu

>> All I can say is: that old ejabberd (+patches) had plenty of
>> gremlins and unexplainable behaviours. The ejabberd in olpcxs-testing
>> has been 100% reliable in behaviour, and I reworked the patches until
>> I didn't see any buggy behaviour.
>
> Thanks, this answers perfectly my question.
>
>> Highly recommended. Should work with just a rebuild if you're not on F9.
>>
>> I cannot confirm that the right patches are in the latest ejabberd on F13.
>
> Ok, will be keeping an eye on further updates to the School Server
> software and will test Sugar against its jabber server.
>
>> cheers,
>>
>>
>> m
>> --
>>  martin at laptop.org -- School Server Architect
>>  - ask interesting questions
>>  - don't get distracted with shiny stuff  - working code first
>>  - http://wiki.laptop.org/go/User:Martinlanghoff
>>
>
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