how to handle cases where a user Repeatedly presses browser Refresh button in the middle of server call ?

Hello Everyone,

do you have any suggestion on how we can handle situations where a user
repeatedly presses browser Refresh button during a server call ? (F5)

I am displaying data in a CellTable which uses RequestFactory to retrieve data.

if I press F5, couple of times during call to the server, I receive the following exception,
com.google.gwt.user.client.rpc.StatusCodeException: 0

complete stack trace can be found here: http://pastebin.com/VSuHH3VX

really appreciate any strategies for dealing with this situation.

Thank You

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