Hi all,

The Wikimedia Foundation Search team is currently working on updating our Elasticsearch version to 7.10 from version 6.8.20. Our goal is to finish this work in the next couple of months. Being on the latest (license-compatible) version will help ensure the stability and reliability of our search infrastructure.

This update will include 2 breaking changes:

1. Cloudelastic will be affected by breaking changes, with more details below. The interface might also change slightly.

1. https://www.elastic.co/guide/en/elasticsearch/reference/7.17/breaking-changes-7.0.html

2. https://www.elastic.co/guide/en/elasticsearch/reference/7.10/migrating-7.10.html#breaking-changes-7.10 

   
   

2. The API Feature Usage extension, whose functionality is unrelated to search, will no longer be supported. This low-usage extension is currently implemented in a complicated and brittle way that depends on Elasticsearch, which creates development drag on the Search team’s work in order to continuously maintain and upkeep.

While in the short term API Feature Usage will be sunsetted, we recognize that it’s probably useful for some users, and we encourage others to continue to support and develop this extension in the longer term, without its brittle dependency on Elasticsearch.

Though the Elasticsearch upgrade will provide overall net benefits, we recognize that these breaking changes will unfortunately affect some users, and appreciate your understanding as we improve our search infrastructure.

Best,

Search Platform