| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.hadoop.hbase; |
| |
| import java.io.IOException; |
| import java.net.BindException; |
| import java.net.InetAddress; |
| import java.net.InetSocketAddress; |
| import java.net.ServerSocket; |
| import java.nio.channels.ServerSocketChannel; |
| import java.util.Locale; |
| import org.apache.hadoop.hbase.testclassification.MiscTests; |
| import org.apache.hadoop.hbase.testclassification.SmallTests; |
| import org.junit.Assert; |
| import org.junit.ClassRule; |
| import org.junit.Test; |
| import org.junit.experimental.categories.Category; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * This tests whether ServerSocketChannel works over ipv6, which ZooKeeper |
| * depends on. On Windows Oracle JDK 6, creating a ServerSocketChannel throws |
| * java.net.SocketException: Address family not supported by protocol family |
| * exception. It is a known JVM bug, seems to be only resolved for JDK7: |
| * http://bugs.sun.com/view_bug.do?bug_id=6230761 |
| * |
| * For this test, we check that whether we are effected by this bug, and if so |
| * the test ensures that we are running with java.net.preferIPv4Stack=true, so |
| * that ZK will not fail to bind to ipv6 address using ClientCnxnSocketNIO. |
| */ |
| @Category({MiscTests.class, SmallTests.class}) |
| public class TestIPv6NIOServerSocketChannel { |
| |
| @ClassRule |
| public static final HBaseClassTestRule CLASS_RULE = |
| HBaseClassTestRule.forClass(TestIPv6NIOServerSocketChannel.class); |
| |
| private static final Logger LOG = LoggerFactory.getLogger(TestIPv6NIOServerSocketChannel.class); |
| |
| /** |
| * Creates and binds a regular ServerSocket. |
| */ |
| private void bindServerSocket(InetAddress inetAddr) throws IOException { |
| while(true) { |
| int port = HBaseTestingUtility.randomFreePort(); |
| InetSocketAddress addr = new InetSocketAddress(inetAddr, port); |
| ServerSocket serverSocket = null; |
| try { |
| serverSocket = new ServerSocket(); |
| serverSocket.bind(addr); |
| break; |
| } catch (BindException ex) { |
| //continue |
| LOG.info("Failed on " + addr + ", inedAddr=" + inetAddr, ex); |
| } finally { |
| if (serverSocket != null) { |
| serverSocket.close(); |
| } |
| } |
| } |
| } |
| |
| /** |
| * Creates a NIO ServerSocketChannel, and gets the ServerSocket from |
| * there. Then binds the obtained socket. |
| * This fails on Windows with Oracle JDK1.6.0u33, if the passed InetAddress is a |
| * IPv6 address. Works on Oracle JDK 1.7. |
| */ |
| private void bindNIOServerSocket(InetAddress inetAddr) throws IOException { |
| while (true) { |
| int port = HBaseTestingUtility.randomFreePort(); |
| InetSocketAddress addr = new InetSocketAddress(inetAddr, port); |
| ServerSocketChannel channel = null; |
| ServerSocket serverSocket = null; |
| try { |
| channel = ServerSocketChannel.open(); |
| serverSocket = channel.socket(); |
| serverSocket.bind(addr); // This does not work |
| break; |
| } catch (BindException ex) { |
| //continue |
| } finally { |
| if (serverSocket != null) { |
| serverSocket.close(); |
| } |
| if (channel != null) { |
| channel.close(); |
| } |
| } |
| } |
| } |
| |
| /** |
| * Checks whether we are effected by the JDK issue on windows, and if so |
| * ensures that we are running with preferIPv4Stack=true. |
| */ |
| @Test |
| public void testServerSocket() throws IOException { |
| byte[] addr = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 }; |
| InetAddress inetAddr = InetAddress.getByAddress(addr); |
| |
| try { |
| bindServerSocket(inetAddr); |
| bindNIOServerSocket(inetAddr); |
| //if on *nix or windows JDK7, both will pass |
| } catch(java.net.SocketException ex) { |
| //On Windows JDK6, we will get expected exception: |
| //java.net.SocketException: Address family not supported by protocol family |
| //or java.net.SocketException: Protocol family not supported |
| Assert.assertFalse(ex instanceof BindException); |
| Assert.assertTrue(ex.getMessage().toLowerCase(Locale.ROOT).contains("protocol family")); |
| LOG.info("Received expected exception:", ex); |
| |
| //if this is the case, ensure that we are running on preferIPv4=true |
| ensurePreferIPv4(); |
| } |
| } |
| |
| /** |
| * Checks whether we are running with java.net.preferIPv4Stack=true |
| */ |
| public void ensurePreferIPv4() throws IOException { |
| InetAddress[] addrs = InetAddress.getAllByName("localhost"); |
| for (InetAddress addr : addrs) { |
| LOG.info("resolved localhost as:" + addr); |
| Assert.assertEquals(4, addr.getAddress().length); //ensure 4 byte ipv4 address |
| } |
| } |
| |
| /** |
| * Tests whether every InetAddress we obtain by resolving can open a |
| * ServerSocketChannel. |
| */ |
| @Test |
| public void testServerSocketFromLocalhostResolution() throws IOException { |
| InetAddress[] addrs = {InetAddress.getLocalHost()}; |
| for (InetAddress addr : addrs) { |
| LOG.info("Resolved localhost as: " + addr); |
| bindServerSocket(addr); |
| bindNIOServerSocket(addr); |
| } |
| } |
| |
| public static void main(String[] args) throws Exception { |
| TestIPv6NIOServerSocketChannel test = new TestIPv6NIOServerSocketChannel(); |
| test.testServerSocket(); |
| test.testServerSocketFromLocalhostResolution(); |
| } |
| } |