FULL PRODUCT VERSION :
java version "1.5.0_04"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_04-b05)
Java HotSpot(TM) Client VM (build 1.5.0_04-b05, mixed mode, sharing)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows 2000 [Version 5.00.2195]

A DESCRIPTION OF THE PROBLEM :
rebinding an already bound socket results an an Error: untranslated Exception being thrown instead of a BindException.  This is a regression as this worked in one of the previous releases(I am not sure which release though).

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
run my JUnit test which binds an already bound socket to a different address.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
BindException should be thrown.
ACTUAL -
Error is thrown.  Funny thing is the Errors chained exception is a sun AlreadyBoundException.

ERROR MESSAGES/STACK TRACES THAT OCCUR :
java.lang.Error: Untranslated exception
	at sun.nio.ch.Net.translateToSocketException(Net.java:63)
	at sun.nio.ch.Net.translateException(Net.java:79)
	at sun.nio.ch.Net.translateException(Net.java:85)
	at sun.nio.ch.SocketAdaptor.bind(SocketAdaptor.java:129)
	at biz.xsoftware.test.nio.suns.TestBindError.testBindError(TestBindError.java:71)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:585)
	at junit.framework.TestCase.runTest(TestCase.java:165)
	at junit.framework.TestCase.runBare(TestCase.java:130)
	at junit.framework.TestResult$1.protect(TestResult.java:106)
	at junit.framework.TestResult.runProtected(TestResult.java:124)
	at junit.framework.TestResult.run(TestResult.java:109)
	at junit.framework.TestCase.run(TestCase.java:120)
	at junit.framework.TestSuite.runTest(TestSuite.java:210)
	at junit.framework.TestSuite.run(TestSuite.java:205)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:478)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:344)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
Caused by: java.net.SocketException: Already bound
	at sun.nio.ch.Net.translateToSocketException(Net.java:49)
	... 19 more
Caused by: sun.nio.ch.AlreadyBoundException
	at sun.nio.ch.SocketChannelImpl.bind(SocketChannelImpl.java:412)
	at sun.nio.ch.SocketAdaptor.bind(SocketAdaptor.java:127)
	... 16 more



REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
/*
 * Created on May 1, 2004
 *
 * To change the template for this generated file go to
 * Window - Preferences - Java - Code Generation - Code and Comments
 */
package biz.xsoftware.test.nio.suns;

import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.nio.channels.SocketChannel;
import java.util.logging.Logger;

import junit.framework.TestCase;

/**
 * Internal Review ID:
 *
 * This test proves the jdk throws an Error when it should be throwing a
 * normal Exception.
 *
 * TODO: need to write test to get binding to port 0 and see on linux if
 * it returns the port instead of 0 with getLocalPort.
 */
public class TestBindError extends TestCase {

	private final static Logger log = Logger.getLogger(TestBindError.class.getName());
	
	
	/**
	 * @param name
	 */
	public TestBindError(String name) {
		super(name);
	}

	public void setUp() {

	}
	
	public void tearDown() {

	}
	
	public void testBindError() throws Exception {
		InetAddress loopBack = InetAddress.getByName("127.0.0.1");
		SocketChannel chan1 = SocketChannel.open();
		chan1.configureBlocking(false);
		
		InetSocketAddress addr1 = new InetSocketAddress(loopBack, 10000);
		InetSocketAddress addr2 = new InetSocketAddress(loopBack, 9999);
		chan1.socket().bind(addr1);
//NOTE: At home I keep the try catch so my test passes until the bug is fixed.  This
//way, when I upgrade to a new jdk and some tests fail, I get happy :) and get rid of
//these try catchs that exist at home.
//		try {
			chan1.socket().bind(addr2);
//			fail("Should have thrown untranslated exception Error");
//		} catch(Error e) {
//			//gulp
//		}
	}
}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
catch Errors in client code which should usually never be done.

Release Regression From : 1.4.2_08
The above release value was the last known release where this 
bug was known to work. Since then there has been a regression.