From 22c6536ffc4af55f6e8e6e786d3b97535c88904c Mon Sep 17 00:00:00 2001
From: Mark Tsai <mark102555@gmail.com>
Date: Mon, 24 Aug 2026 19:21:51 +0800
Subject: [PATCH] HDDS-16256. Avoid the per-group list copy in
 OMKeyRequest.filterOutBlocksStillInUse

---
 .../org/apache/hadoop/ozone/om/request/key/OMKeyRequest.java   | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/request/key/OMKeyRequest.java b/hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/request/key/OMKeyRequest.java
index ce76ea9dc44..3d478e46139 100644
--- a/hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/request/key/OMKeyRequest.java
+++ b/hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/request/key/OMKeyRequest.java
@@ -1255,7 +1255,8 @@ protected Pair<Map<OmKeyInfo, List<OmKeyLocationInfo>>, Integer> filterOutBlocks
     // the referenceKey.
     Map<ContainerBlockID, OmKeyLocationInfo> cbIdSet = referenceKey.getKeyLocationVersions()
         .stream()
-        .flatMap(e -> e.createLocationList().stream())
+        .flatMap(group -> group.getLocationLists().stream())
+        .flatMap(List::stream)
         .collect(Collectors.toMap(omKeyLocationInfo -> omKeyLocationInfo.getBlockID().getContainerBlockID(),
             Function.identity()));
     Map<OmKeyInfo, List<OmKeyLocationInfo>> filteredOutBlocks = new HashMap<>();