FULL PRODUCT VERSION :


A DESCRIPTION OF THE PROBLEM :
while the documentation of other methods of this class mentions if the respective method may block,
the docu for disconnect() does not mention it at all, and it even states:
"If this channel's socket is not connected, or if the channel is closed, then invoking this method has no effect."
which is not true if one considers blocking as an effect, which i think most people would.

http://docs.oracle.com/javase/8/docs/api/java/nio/channels/DatagramChannel.html#disconnect--


REPRODUCIBILITY :
This bug can be reproduced always.

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junit test: https://gist.github.com/hoijui/e77f5d276b6b3c29b123
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