Heads up in case you query Event Logging tables.
---------- Forwarded message ---------- From: *Marcel Ruiz Forns* mforns@wikimedia.org Date: Monday, November 30, 2015 Subject: [Analytics] EventLogging outage in progress? To: "A mailing list for the Analytics Team at WMF and everybody who has an interest in Wikipedia and analytics." analytics@lists.wikimedia.org
Team, I checked and, indeed, EventLogging database needs backfilling from 2015-11-27 01:00 until 2015-11-27 07:00. I updated the docs and started the backfilling process. I'll let you know when it it finished. Cheers
On Fri, Nov 27, 2015 at 8:31 PM, Oliver Keyes <okeyes@wikimedia.org javascript:_e(%7B%7D,'cvml','okeyes@wikimedia.org');> wrote:
It seems like it would depend on the class of error. 48 hours for events not syncing, fine. 48 hours of /total data loss/ is a completely different class of problem.
On 27 November 2015 at 11:35, Nuria Ruiz <nuria@wikimedia.org javascript:_e(%7B%7D,'cvml','nuria@wikimedia.org');> wrote:
Unfortunately, the only team-members working full-time yesterday and
today
are we Europe folks. We weren't there when that happened and we don't get those alerts on the phone, we should though.
Given that this system is tier-2 i do not think we need an immediate response, 24 hours should be an acceptable ETA. I would say even 48.
On Fri, Nov 27, 2015 at 2:31 AM, Marcel Ruiz Forns <mforns@wikimedia.org
javascript:_e(%7B%7D,'cvml','mforns@wikimedia.org');>
wrote:
Thanks, Ori, for having a look at this and restarting EL.
I understand it was 01:30 UTC on Friday (today), not Thursday. It went
on
during 5-6 hours. Unfortunately, the only team-members working full-time yesterday and
today
are we Europe folks. We weren't there when that happened and we don't get those alerts on the phone, we should though.
This problem happened already like a month ago. We'll backfill the
missing
events and will investigate. Thanks again for the heads-up.
On Fri, Nov 27, 2015 at 8:01 AM, Ori Livneh <ori@wikimedia.org
javascript:_e(%7B%7D,'cvml','ori@wikimedia.org');> wrote:
On Thu, Nov 26, 2015 at 10:46 PM, Ori Livneh <ori@wikimedia.org
javascript:_e(%7B%7D,'cvml','ori@wikimedia.org');> wrote:
Seems that eventlog1001 has not received any events since 01:30 UTC on Thursday
http://ganglia.wikimedia.org/latest/graph.php?r=day&z=xlarge&c=Misce...
This is pretty severe; I'd page if it wasn't a US holiday.
Kafka clients on eventlog1001 were in a "Autocommitting consumer
offset"
death-loop and not receiving any events from the Kafka brokers. I ran eventloggingctl stop / eventloggingctl start and they recovered. Needs
to be
investigated more thoroughly. Otto, can you follow up?
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