J2SE Version (please include all output from java -version flag):
java version "1.6.0_13"
Java(TM) SE Runtime Environment (build 1.6.0_13-b03)
Java HotSpot(TM) Client VM (build 11.3-b02, mixed mode, sharing)

Does this problem occur on J2SE 5.0.x or 6.0? Yes / No (pick one)
Yes

Operating System Configuration Information (be specific):
Client: Microsoft Windows XP [Version 5.1.2600]

Bug Description:

Error: java.net.SocketException: Socket operation on nonsocket: getsockname

Calling channel.socket().getLocalPort() can result in an Error.
The JavaDoc says: the local port number to which this socket is bound or -1 if the socket is not bound yet.
No Error should ever be thrown by this method.

java.lang.Error: java.net.SocketException: Socket operation on nonsocket: getsockname
at sun.nio.ch.Net.localAddress(Net.java:125)
at sun.nio.ch.SocketChannelImpl.localAddress(SocketChannelImpl.java:430)
at sun.nio.ch.SocketAdaptor.getLocalPort(SocketAdaptor.java:159)