SOLR-16257: Improve ZkStateReader to avoid race condition (#909)

Race condition existed between collectionWatches and watchedCollectionStates.
apache · Jul 20, 2022 · 97458a5 · 97458a5
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diff --git a/solr/CHANGES.txt b/solr/CHANGES.txt
@@ -59,6 +59,9 @@ Improvements
 
 * SOLR-16225: Upgrade dependencies (Carrot2, HPPC) (Dawid Weiss)
 
+* SOLR-16257: Improve ZkStateReader to avoid race condition between collectionWatches and watchedCollectionStates
+  (Patson Luk, Houston Putman, Mike Drob)
+
 Optimizations
 ---------------------
 * SOLR-16120: Optimise hl.fl expansion. (Christine Poerschke, David Smiley, Mike Drob)