8280233: Temporarily disable Unix domain sockets in Windows PipeImpl

Backport-of: 03680bea1cca1113ea23a1eb7a413b93dd73c381

Author: Alexey Pavlyutkin

src/java.base/windows/classes/sun/nio/ch/PipeImpl.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2002, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2002, 2022, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -32,8 +32,6 @@
 import java.net.InetAddress;
 import java.net.InetSocketAddress;
 import java.net.SocketAddress;
-import java.net.UnixDomainSocketAddress;
-import java.net.StandardProtocolFamily;
 import java.net.StandardSocketOptions;
 import java.nio.*;
 import java.nio.channels.*;
@@ -164,10 +162,6 @@ public void run() {
                     try {
                         if (ssc != null)
                             ssc.close();
-                        if (sa instanceof UnixDomainSocketAddress) {
-                            Path path = ((UnixDomainSocketAddress) sa).getPath();
-                            Files.deleteIfExists(path);
-                        }
                     } catch (IOException e2) {}
                 }
             }
@@ -184,8 +178,7 @@ public void run() {
     /**
      * Creates Pipe implementation that supports optionally buffering.
      *
-     * @implNote The pipe uses Unix domain sockets where possible. It uses a
-     * loopback connection on older editions of Windows. When buffering is
+     * @implNote Uses a loopback connection. When buffering is
      * disabled then it sets TCP_NODELAY on the sink channel.
      */
     @SuppressWarnings("removal")
@@ -212,23 +205,8 @@ public SinkChannelImpl sink() {
         return sink;
     }
 
-    private static volatile boolean noUnixDomainSockets;
-
     private static ServerSocketChannel createListener() throws IOException {
-        ServerSocketChannel listener = null;
-        if (!noUnixDomainSockets) {
-            try {
-                listener = ServerSocketChannel.open(StandardProtocolFamily.UNIX);
-                return listener.bind(null);
-            } catch (UnsupportedOperationException | IOException e) {
-                // IOException is most likely to be caused by the temporary directory
-                // name being too long. Possibly should log this.
-                noUnixDomainSockets = true;
-                if (listener != null)
-                    listener.close();
-            }
-        }
-        listener = ServerSocketChannel.open();
+        ServerSocketChannel listener = ServerSocketChannel.open();
         InetAddress lb = InetAddress.getLoopbackAddress();
         listener.bind(new InetSocketAddress(lb, 0));
         return listener;