From 462945f2c111704ec60b9bc5617554fd87ae03cf Mon Sep 17 00:00:00 2001
From: peiwangdb <pennyiscomputing@gmail.com>
Date: Mon, 13 Dec 2021 11:36:10 -0500
Subject: [PATCH] fix build failure I4KUOB

---
 .../java/io/prestosql/plugin/memory/MemoryThreadManager.java    | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/presto-memory/src/main/java/io/prestosql/plugin/memory/MemoryThreadManager.java b/presto-memory/src/main/java/io/prestosql/plugin/memory/MemoryThreadManager.java
index 7b8d4ba98..59922e893 100644
--- a/presto-memory/src/main/java/io/prestosql/plugin/memory/MemoryThreadManager.java
+++ b/presto-memory/src/main/java/io/prestosql/plugin/memory/MemoryThreadManager.java
@@ -36,7 +36,7 @@ public class MemoryThreadManager
      * @param size
      * @return
      */
-    public static ScheduledExecutorService initSharedThreadPool(int size)
+    public static synchronized ScheduledExecutorService initSharedThreadPool(int size)
     {
         if (executor == null) {
             executor = Executors.newScheduledThreadPool(Math.max(size, 1), threadFactory);