From e5c3b5908ce9266afa9fc8fad00bd51201040a5c Mon Sep 17 00:00:00 2001
From: PJ Fanning <pjfanning@users.noreply.github.com>
Date: Tue, 4 Jun 2024 18:11:26 +0100
Subject: [PATCH] move lock in DeserializerCache to before the try block

---
 .../fasterxml/jackson/databind/deser/DeserializerCache.java    | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/main/java/com/fasterxml/jackson/databind/deser/DeserializerCache.java b/src/main/java/com/fasterxml/jackson/databind/deser/DeserializerCache.java
index 28127c1af0..0282af7213 100644
--- a/src/main/java/com/fasterxml/jackson/databind/deser/DeserializerCache.java
+++ b/src/main/java/com/fasterxml/jackson/databind/deser/DeserializerCache.java
@@ -253,9 +253,8 @@ protected JsonDeserializer<Object> _createAndCacheValueDeserializer(Deserializat
          * limitations necessary to ensure that only completely initialized ones
          * are visible and used.
          */
+        _incompleteDeserializersLock.lock();
         try {
-            _incompleteDeserializersLock.lock();
-
             // Ok, then: could it be that due to a race condition, deserializer can now be found?
             JsonDeserializer<Object> deser = _findCachedDeserializer(type);
             if (deser != null) {