Package org.apache.hadoop.hbase

Class TestIPv6NIOServerSocketChannel

java.lang.Object

org.apache.hadoop.hbase.TestIPv6NIOServerSocketChannel

public class TestIPv6NIOServerSocketChannel
extends Object

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.

Field Summary

Fields

Modifier and Type	Field	Description
static final HBaseClassTestRule	CLASS_RULE
private static final org.slf4j.Logger	LOG

Constructor Summary

Constructors

Constructor	Description
TestIPv6NIOServerSocketChannel()

Method Summary

Modifier and Type	Method	Description
private void	bindNIOServerSocket(InetAddress inetAddr)	Creates a NIO ServerSocketChannel, and gets the ServerSocket from there.
private void	bindServerSocket(InetAddress inetAddr)	Creates and binds a regular ServerSocket.
void	ensurePreferIPv4()	Checks whether we are running with java.net.preferIPv4Stack=true
static void	main(String[] args)
void	testServerSocket()	Checks whether we are effected by the JDK issue on windows, and if so ensures that we are running with preferIPv4Stack=true.
void	testServerSocketFromLocalhostResolution()	Tests whether every InetAddress we obtain by resolving can open a ServerSocketChannel.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

CLASS_RULE

public static final HBaseClassTestRule CLASS_RULE

LOG

private static final org.slf4j.Logger LOG

Constructor Details

TestIPv6NIOServerSocketChannel

public TestIPv6NIOServerSocketChannel()

Method Details

bindServerSocket

private void bindServerSocket(InetAddress inetAddr)
                       throws IOException

Creates and binds a regular ServerSocket.

Throws:

IOException

bindNIOServerSocket

private void bindNIOServerSocket(InetAddress inetAddr)
                          throws IOException

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.

Throws:

IOException

testServerSocket

public void testServerSocket()
                      throws IOException

Checks whether we are effected by the JDK issue on windows, and if so ensures that we are running with preferIPv4Stack=true.

Throws:

IOException

ensurePreferIPv4

public void ensurePreferIPv4()
                      throws IOException

Checks whether we are running with java.net.preferIPv4Stack=true

Throws:

IOException

testServerSocketFromLocalhostResolution

public void testServerSocketFromLocalhostResolution()
                                             throws IOException

Tests whether every InetAddress we obtain by resolving can open a ServerSocketChannel.

Throws:

IOException

main

public static void main(String[] args)
                 throws Exception

Throws:

Exception