What kind of opensource search engine text bar is sentry using like are they using solr, elasticsearch, sphinx, etc. or Sentry is using their custom search bar.?
Search in Sentry 9 is a custom implementation built on top of SQL. The UI is all in-house as far as I know, as is the DSL (src/sentry/search/utils.py is the core parsing code).
Search in the current iteration (saas) of Sentry is/will be based on a bunch of newer tech, with Clickhouse being the primary infrastructure tooling.