The Solr PMC is pleased to announce the release of Apache Solr 9.1.1.

Solr is the popular, blazing fast, open source NoSQL search platform
from the Apache Solr project. Its major features include powerful
full-text search, hit highlighting, faceted search, dynamic
clustering, database integration, rich document handling, and
geospatial search. Solr is highly scalable, providing fault tolerant
distributed search and indexing, and powers the search and navigation
features of many of the world's largest internet sites.

Solr 9.1.1 is available for immediate download at:

https://solr.apache.org/downloads.html

Solr 9.1.1 Release Highlights:

Bugfixes:

SOLR-16589: Fixed issue where large fields with large=true could be
            truncated when using unicode values
SOLR-16585: Fixed NPE when paginating MatchAllDocs with non-zero start
            offset, like q=*:*&start=10
SOLR-16165: Fixed rare deadlock in SlotAcc static initialization
SOLR-16622: Fixed issue where replicas could fail to register as
            active after node restart

Other:

SOLR-16443: Upgrade Jackson bom to 2.13.4.20221013
SOLR-16568: Upgrade woodstox-core to 6.4.0
SOLR-16598: Upgrade Protobuf to 3.21.12
SOLR-16567: Fixed problem with filtering and KNN search, especially
            when using post-filters
SOLR-16588: Fixed problem with default knn algorithm
SOLR-16480: ConfigSets now have an overridable allow-list for filetypes

Please refer to the Upgrade Notes in the Solr Ref Guide for
information on upgrading from previous Solr versions:

https://solr.apache.org/guide/solr/9_1/upgrade-notes/solr-upgrade-notes.html

Please read CHANGES.txt for a full list of bugfixes:

https://solr.apache.org/9_1_1/changes/Changes.html

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