From 81377e2fd5f716ad7a52a2757486789b5704e261 Mon Sep 17 00:00:00 2001
From: Stephane Nicoll <snicoll@pivotal.io>
Date: Thu, 11 Oct 2018 11:50:53 +0200
Subject: [PATCH] Invoke Flyway#setCallbacks only if necessary

Closes gh-14775
---
 .../boot/autoconfigure/flyway/FlywayAutoConfiguration.java    | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/flyway/FlywayAutoConfiguration.java b/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/flyway/FlywayAutoConfiguration.java
index 2c4b05a047..4615a32b20 100644
--- a/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/flyway/FlywayAutoConfiguration.java
+++ b/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/flyway/FlywayAutoConfiguration.java
@@ -149,7 +149,9 @@ public class FlywayAutoConfiguration {
 			else {
 				flyway.setDataSource(this.dataSource);
 			}
-			flyway.setCallbacks(this.flywayCallbacks.toArray(new FlywayCallback[0]));
+			if (!this.flywayCallbacks.isEmpty()) {
+				flyway.setCallbacks(this.flywayCallbacks.toArray(new FlywayCallback[0]));
+			}
 			String[] locations = new LocationResolver(flyway.getDataSource())
 					.resolveLocations(this.properties.getLocations());
 			checkLocationExists(locations);