From 3afb5ca1330b96046af3b509ab05e69b64b63fee Mon Sep 17 00:00:00 2001
From: Yannick Welsch <yannick@welsch.lu>
Date: Wed, 19 Feb 2020 16:07:15 +0100
Subject: [PATCH] Fix synchronization in ByteSizeCachingDirectory (#52512)

One particular code place was synchronizing on the wrong object.
---
 .../org/elasticsearch/index/store/ByteSizeCachingDirectory.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/server/src/main/java/org/elasticsearch/index/store/ByteSizeCachingDirectory.java b/server/src/main/java/org/elasticsearch/index/store/ByteSizeCachingDirectory.java
index 9a202a9b4cd..eb14d3047a6 100644
--- a/server/src/main/java/org/elasticsearch/index/store/ByteSizeCachingDirectory.java
+++ b/server/src/main/java/org/elasticsearch/index/store/ByteSizeCachingDirectory.java
@@ -161,7 +161,7 @@ final class ByteSizeCachingDirectory extends FilterDirectory {
                 try {
                     super.close();
                 } finally {
-                    synchronized (this) {
+                    synchronized (ByteSizeCachingDirectory.this) {
                         numOpenOutputs--;
                         modCount++;
                     }