the Analytics team is going to enable Kerberos authentication for Hadoop on Monday December 2nd. The procedure will start around 10 AM CET and will hopefully last 3/4 hours, but since this is an invasive change there might be a possibility that it will last more. If you have anything important that requires Hadoop on this date please let us know in advance.
Feel free to reach out to IRC #wikimedia-analytics on Freenode too!
Luca (on behalf of the Analytics team)