Hi everybody,
On Monday 21st we'd like to reboot all stat100x hosts for Linux kernel upgrades at around 9 AM CET. This means that all the notebooks and various activities running on those nodes will be stopped for a brief amount of time. To repay your patience, two things will be added:
- A shared kerberos credential cache with notebooks. This practically means that you will only be required to kinit once (either after doing ssh to stat100x or in a Jupyter notebook), and the credentials will be shared (no more double kinit etc..). It is already "live" on stat1004 if you want to test it! Since the new shared credential will have a new location on disk, all kerberos sessions will be destroyed and you'll have to kinit again when the reboots are completed. More details in
https://phabricator.wikimedia.org/T255262.
- A new endpoint for Hive called 'analytics-hive.eqiad.wmnet', that should replace hive jdbc/metastore configs hardcoding an-coord1001.eqiad.wmnet (and allow us to failover transparently if needed without requesting job restarts etc..). The side effect of this is that all hive-related tools will change configs (transparently for external users). If you have any script that points directly to hive via JDBC (for example a Python script using PyHive etc..) please update it with the new endpoint.
If this schedule impacts your work, please ping me via email/IRC/etc.. and I'll try to reschedule accordingly :)
Thanks!
Luca (on behalf of Analytics / Data Engineering)