From da96dda202d422467db17a9c6b6fbefd16b33dca Mon Sep 17 00:00:00 2001
From: Yuba <m.takuma@gmail.com>
Date: Fri, 30 Aug 2024 10:32:43 +0900
Subject: [PATCH] refs#1496 ConcurrentModificationException when resolved a new
 classname

---
 framework/src/play/classloading/ApplicationClassloader.java | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/framework/src/play/classloading/ApplicationClassloader.java b/framework/src/play/classloading/ApplicationClassloader.java
index da1ac216ca..ee706be905 100644
--- a/framework/src/play/classloading/ApplicationClassloader.java
+++ b/framework/src/play/classloading/ApplicationClassloader.java
@@ -26,6 +26,7 @@
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
 
 import org.apache.commons.io.IOUtils;
 import org.apache.commons.lang3.StringUtils;
@@ -488,7 +489,7 @@ public List<Class> getAssignableClasses(Class clazz) {
     }
 
     // assignable classes cache
-    private final Map<String, List<Class>> assignableClassesByName = new HashMap<>(100);
+    private final Map<String, List<Class>> assignableClassesByName = new ConcurrentHashMap<>(100);
 
     /**
      * Find a class in a case insensitive way