Hello folks, *What:* We'd like to schedule a maintenance window for all the stat machines: stat1004.eqiad.wmnet stat1005.eqiad.wmnet stat1006.eqiad.wmnet stat1007.eqiad.wmnet stat1008.eqiad.wmnet *In this maintenance window, we will:* * Upgrade the conda-analytics debian package. This package is how we deploy Spark3. The upgrade will allow us to run JupyterHub and JupyterLab on top of it. * Deploy new puppet configurations that will switch from running Jupyter on top of anaconda-wmf to running on top of conda-analytics. * This effectively upgrades our Jupyter deployment as follows: * Upgrades JupyterHub from 1.1.0 to 1.5.0. * Upgrades JupyterLab from 3.2.9 to 3.4.8. * Upgrades Spark on newly created conda environments from 2.4.4 to 3.1.2. * Upgrades wmfdata on newly created conda environments to 2.0.0. This version of wmfdata includes breaking changes. *IMPORTANT*: After this maintenance window, you should expect the following: *** JupyterHub and any existing JupyterLab processes including any running kernels, will be shut down, and will have to be restarted manually by the respective owners. *** *** JupyterLab UI will have minor changes. *** *** New conda environments created via JupyterHub will now be based off of conda-analytics and will utilize Spark3. *** *** Existing conda environments based off of anaconda-wmf will continue to work, and continue to utilize Spark2. *** *Why: * As part of our effort to deprecate Spark2 and make Spark3 widely available, we are deprecating the use of anaconda-wmf and Spark2, in favor of conda-analytics and Spark3. Note this is just deprecation, you will still be able to use your existing conda environments running on top of anaconda-wmf and Spark2. *When:* We are proposing the following window for these changes: Wednesday 30 Nov 2022 12:30 to 13:30 UTC. (7:30 AM ET / 4:30 AM PT) *More info:* Spark3 upgrade: https://wikitech.wikimedia.org/wiki/Analytics/Systems/Cluster/Spark/Migrati… The old anaconda-wmf base conda environment: https://wikitech.wikimedia.org/wiki/Analytics/Systems/Conda The new conda-analytics base conda environment: https://wikitech.wikimedia.org/wiki/Analytics/Systems/conda-analytics wmfdata changes: https://github.com/wikimedia/wmfdata-python/blob/main/CHANGELOG.md Please let us know if you have any questions or objections. -- Xabriel J. Collazo Mojica (he/him, pronunciation <https://commons.wikimedia.org/wiki/File:Xabriel_Collazo_Mojica_-_pronunciation.ogg> ) Sr Software Engineer Wikimedia Foundation