--- old/src/java.base/share/classes/java/io/ObjectInputFilter.java	2019-05-15 16:23:01.222963207 -0400
+++ new/src/java.base/share/classes/java/io/ObjectInputFilter.java	2019-05-15 16:23:00.898961600 -0400
@@ -283,7 +283,7 @@
         /**
          * Current configured filter.
          */
-        private static ObjectInputFilter serialFilter = configuredFilter;
+        private static volatile ObjectInputFilter serialFilter = configuredFilter;
 
         /**
          * Returns the system-wide serialization filter or {@code null} if not configured.
@@ -291,9 +291,7 @@
          * @return the system-wide serialization filter or {@code null} if not configured
          */
         public static ObjectInputFilter getSerialFilter() {
-            synchronized (serialFilterLock) {
-                return serialFilter;
-            }
+            return serialFilter;
         }
 
         /**