From eb146240476d0051aaae90fa83b017c19e7774ad Mon Sep 17 00:00:00 2001
From: Moritz Halbritter <moritz.halbritter@broadcom.com>
Date: Wed, 20 Aug 2025 15:05:50 +0200
Subject: [PATCH] Improve null-safety of module/spring-boot-mongodb

See gh-46926
---
 .../autoconfigure/MongoReactiveAutoConfiguration.java        | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/module/spring-boot-mongodb/src/main/java/org/springframework/boot/mongodb/autoconfigure/MongoReactiveAutoConfiguration.java b/module/spring-boot-mongodb/src/main/java/org/springframework/boot/mongodb/autoconfigure/MongoReactiveAutoConfiguration.java
index ba542b4f95c..3492d2cbb09 100644
--- a/module/spring-boot-mongodb/src/main/java/org/springframework/boot/mongodb/autoconfigure/MongoReactiveAutoConfiguration.java
+++ b/module/spring-boot-mongodb/src/main/java/org/springframework/boot/mongodb/autoconfigure/MongoReactiveAutoConfiguration.java
@@ -117,8 +117,9 @@ public final class MongoReactiveAutoConfiguration {
 		@Override
 		public void customize(Builder builder) {
 			if (!isCustomTransportConfiguration(this.settings.getIfAvailable())) {
-				this.eventLoopGroup = new MultiThreadIoEventLoopGroup(NioIoHandler.newFactory());
-				builder.transportSettings(TransportSettings.nettyBuilder().eventLoopGroup(this.eventLoopGroup).build());
+				EventLoopGroup eventLoopGroup = new MultiThreadIoEventLoopGroup(NioIoHandler.newFactory());
+				this.eventLoopGroup = eventLoopGroup;
+				builder.transportSettings(TransportSettings.nettyBuilder().eventLoopGroup(eventLoopGroup).build());
 			}
 		}