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> wrote:

On Thu, Nov 26, 2015 at 10:46 PM, Ori Livneh <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=Miscellaneous+eqiad&h=eventlog1001.eqiad.wmnet&jr=&js=&event=hide&ts=0&v=140128.28&m=bytes_in&vl=bytes%2Fsec&ti=Bytes+Received

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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Marcel Ruiz Forns

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Wikimedia Foundation

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