From dfad778d512262d8d3dd7d43df0c46747397e263 Mon Sep 17 00:00:00 2001
From: Qi Chen <kaka11.chen@gmail.com>
Date: Mon, 4 Dec 2023 09:26:11 +0800
Subject: [PATCH] [Opt](Coordinator) Don't shuffle scan range locations when
 performing scan range assignments. (#27268)

Currently same query will scan different bytes in each instance in a single node environment. Don't shuffle scan range locations when performing scan range assignments to avoid it.
---
 fe/fe-core/src/main/java/org/apache/doris/qe/Coordinator.java | 1 -
 1 file changed, 1 deletion(-)

diff --git a/fe/fe-core/src/main/java/org/apache/doris/qe/Coordinator.java b/fe/fe-core/src/main/java/org/apache/doris/qe/Coordinator.java
index a0bced26e1..f3622b62fb 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/qe/Coordinator.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/qe/Coordinator.java
@@ -2194,7 +2194,6 @@ public class Coordinator implements CoordInterface {
                 // only analysis olap scan node
                 continue;
             }
-            Collections.shuffle(locations);
             Set<Integer> scanNodeIds = fragmentIdToScanNodeIds.computeIfAbsent(scanNode.getFragmentId(),
                     k -> Sets.newHashSet());
             scanNodeIds.add(scanNode.getId().asInt());