[Engineering] Upcoming reboots of stat and Hadoop hosts due to Kernel upgrades

Wed Sep 21 17:24:53 UTC 2016

[Originally sent only to the Analytics and Research mailing lists]

Hi everybody,

the Analytics team is going to reboot all the stat hosts (stat1002,
stat1003 and stat1004) and the Hadoop cluster nodes to install new kernels
(security upgrade required). The work will start tomorrow morning (Sep
22nd) at around 9:00 AM CEST.
This task might interfere with ongoing Hadoop jobs or processes running on
the stat* hosts, so please let me know if there is any motivation to
postpone the maintenance.

Please also feel free to reach out to the analytics IRC channel
(#wikimedia-analytics) or to me directly (username: elukey) if you have
more questions.

Thanks!

Regards,

Luca
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