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kotman12 pushed a commit to branch branch_9x
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commit 8ecb337887e25116954945467293f88ca721c2d0
Author: Luke Kot-Zaniewski <[email protected]>
AuthorDate: Thu May 28 11:42:49 2026 -0400

    update major changes page
---
 .../upgrade-notes/pages/major-changes-in-solr-9.adoc   | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git 
a/solr/solr-ref-guide/modules/upgrade-notes/pages/major-changes-in-solr-9.adoc 
b/solr/solr-ref-guide/modules/upgrade-notes/pages/major-changes-in-solr-9.adoc
index a9fde5d4696..697d4a7745b 100644
--- 
a/solr/solr-ref-guide/modules/upgrade-notes/pages/major-changes-in-solr-9.adoc
+++ 
b/solr/solr-ref-guide/modules/upgrade-notes/pages/major-changes-in-solr-9.adoc
@@ -97,6 +97,24 @@ The project normally doesn't remove functionality in a minor 
release, but we mad
 
 +NOTE: The previous parse-context-based configuration (`parseContext.config`) 
is no longer supported. Tika parser-specific properties must now be configured 
directly on the Tika Server itself, rather than through Solr configuration. 
Please refer to the Tika Server documentation for details on how to set these 
properties.
 
+=== Luke requests now distributed by default
+
+In SolrCloud mode, the xref:indexing-guide:luke-request-handler.adoc[Luke 
Request Handler] (`/admin/luke`) now automatically distributes requests across 
all shards in the collection and returns an aggregated view of the index.
+Previously, Luke only reported on the local shard that received the request, 
giving an incomplete picture of multi-shard collections.
+In user-managed clusters, you can opt into distributed behavior by passing the 
`shards` parameter with explicit shard URLs.
+See xref:indexing-guide:luke-request-handler.adoc[] for more details.
+
+To revert to the previous local-only behavior, set `distrib=false` on 
individual requests, or configure it as a default in `solrconfig.xml`:
+
+[source,xml]
+----
+<requestHandler name="/admin/luke" class="solr.LukeRequestHandler">
+  <lst name="defaults">
+    <bool name="distrib">false</bool>
+  </lst>
+</requestHandler>
+----
+
 === JWT Authentication
 
 The `blockUnknown` setting in the JWT Authentication plugin now defaults to 
`true`, meaning requests without a valid JWT token are blocked by default.

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