Do I need to cancel the selection key when I close it's socket channel?

I have a non blocking server implementation and I need to know is it mandatory to call SelectionKey#cancel after I have called the SocketChannel#close to it's channel? When I close the channel, will it cancel the key automatically or what if I don't cancel the key, how does it affect to the selector?
JK

Thanks ejp, you are right, it's documented in SelectableChannel not in SocketChannel. My mistake.

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PAGE 25 IN CHECK MANAGEMENT PDF FILE FROM HELP.SAP. TO DOWNLOAD CLICK ON BELOW LINK
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Do I need to cancel the selection key when I close it's socket channel?

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