Due to some big jobs running we postponed the maintenance window to
tomorrow Thu Sep 24th (EU Morning).
On Tue, Sep 22, 2020 at 9:58 PM Luca Toscano <ltoscano(a)wikimedia.org> wrote:
I am going to do some maintenance on the Hadoop cluster tomorrow Wed 23rd
that will require some quiet time for TLS certificate upgrades (we use it
to encrypt data for various daemons, like Yarn NodeManagers and HDFS
Journalnodes). With quiet time I mean no Yarn jobs running on the cluster
and HDFS read-only mode, hopefully lasting 30/60 minutes maximum.
More info in https://phabricator.wikimedia.org/T253957
If this impacts some important work please let me know it in the task and
I'll reschedule :)
Luca (on behalf of the Analytics team)