From 307e8fce11e5ef467c8b26bb8c39ae1440fedd14 Mon Sep 17 00:00:00 2001
From: "evgeny.bovykin" <rebovykin@gmail.com>
Date: Tue, 10 May 2022 13:43:54 +0200
Subject: [PATCH] Fix debug logging in MergingPersistenceUnitManager.

A String.format token was missing, so `mappingFileName` was printed instead of a `persistenceUnitName`, and `persistenceUnitName` wasn't actually printed at all.

See #2526.
---
 .../data/jpa/support/MergingPersistenceUnitManager.java       | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/main/java/org/springframework/data/jpa/support/MergingPersistenceUnitManager.java b/src/main/java/org/springframework/data/jpa/support/MergingPersistenceUnitManager.java
index 294560f74..fed263bad 100644
--- a/src/main/java/org/springframework/data/jpa/support/MergingPersistenceUnitManager.java
+++ b/src/main/java/org/springframework/data/jpa/support/MergingPersistenceUnitManager.java
@@ -82,7 +82,9 @@ public class MergingPersistenceUnitManager extends DefaultPersistenceUnitManager
 
 		for (String mappingFileName : oldPui.getMappingFileNames()) {
 			if (!pui.getMappingFileNames().contains(mappingFileName)) {
-				LOG.debug("Adding mapping file to persistence unit {}.", mappingFileName, persistenceUnitName);
+				if (LOG.isDebugEnabled()) {
+					LOG.debug(String.format("Adding mapping file %s to persistence unit %s.", mappingFileName, persistenceUnitName));
+				}
 				pui.addMappingFileName(mappingFileName);
 			}
 		}