--- a/src/java.base/share/classes/sun/nio/ch/Net.java	Thu Nov 14 09:06:10 2019 +0000
+++ b/src/java.base/share/classes/sun/nio/ch/Net.java	Thu Nov 14 10:16:28 2019 +0000
@@ -711,7 +711,7 @@
 
     public static UnixDomainSocketAddress checkUnixAddress(SocketAddress sa) {
         if (sa == null)
-            throw new NullPointerException();
+            return null;
         if (!(sa instanceof UnixDomainSocketAddress))
             throw new UnsupportedAddressTypeException();
         UnixDomainSocketAddress usa = (UnixDomainSocketAddress)sa;