Hello,

This is the weekly update from the Search Platform team for the week starting 2019-03-11.

As always, feedback and questions are welcome.

== Discussions ==

=== Search === * As part of the ElasticSearch v6 upgrade: ** uploaded ElasticSearch 6.5.4 packages to reprepro [0] ** Adapted the ElasticSearch puppet module [1] ** Tested that we can run multiple ElasticSearch clusters on same hardware [2] * We discovered that the Maven Wrapper does not support XDG_CACHE_HOME, so we updated java8: to actually use the new image; fixing the mvn wrapper cache issue [3] * Upon unpacking the Greek analysis chain, we found that the filter isn't properly handling language-specific lowercasing in language analyzers; fixed it by adding Greek empty-token filter and keep lang-specific lowercasing [4] * As part of the lang-specific lowercasing, we also upgraded the ICU normalization [5] [6] * We decided we should use a better/cleaner approach for icinga elasticsearch check and merged http and https elasticsearch icinga checks into one [7] * We also updated the alerts for mjolnir daemons, so we can tell when it starts misbehaving [8]

[0] https://phabricator.wikimedia.org/T218113 [1] https://phabricator.wikimedia.org/T217196 [2] https://phabricator.wikimedia.org/T193654 [3] https://phabricator.wikimedia.org/T218099 [4] https://phabricator.wikimedia.org/T217602 [5] https://www.mediawiki.org/wiki/User:TJones_(WMF)/Notes/Greek_and_Unexpected_... [6] https://phabricator.wikimedia.org/T203117 [7] https://phabricator.wikimedia.org/T215587 [8] https://phabricator.wikimedia.org/T214494

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Interested in getting involved? See tasks marked as "Easy" or "Volunteer needed" in Phabricator.

[1] https://phabricator.wikimedia.org/maniphest/query/qW51XhCCd8.7/#R [2] https://phabricator.wikimedia.org/maniphest/query/5KEPuEJh9TPS/#R

Yours, Chris Koerner (he/him) Community Relations Specialist Wikimedia Foundation