diff --git a/lucene/CHANGES.txt b/lucene/CHANGES.txt
index db018fb21446..7179685d0306 100644
--- a/lucene/CHANGES.txt
+++ b/lucene/CHANGES.txt
@@ -72,6 +72,8 @@ Optimizations
 
 * GITHUB#12160: Concurrent rewrite for AbstractKnnVectorQuery. (Kaival Parikh)
 
+* GITHUB#12270 Don't generate stacktrace in CollectionTerminatedException. (Armin Braun)
+
 Bug Fixes
 ---------------------
 
diff --git a/lucene/core/src/java/org/apache/lucene/search/CollectionTerminatedException.java b/lucene/core/src/java/org/apache/lucene/search/CollectionTerminatedException.java
index 2a7e04447481..89f14fff20bc 100644
--- a/lucene/core/src/java/org/apache/lucene/search/CollectionTerminatedException.java
+++ b/lucene/core/src/java/org/apache/lucene/search/CollectionTerminatedException.java
@@ -31,4 +31,10 @@ public final class CollectionTerminatedException extends RuntimeException {
   public CollectionTerminatedException() {
     super();
   }
+
+  @Override
+  public Throwable fillInStackTrace() {
+    // never re-thrown so we can save the expensive stacktrace
+    return this;
+  }
 }