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From Ted Dunning <>
Subject Re: Strategies for continuous deployment of services to avoid interruption?
Date Tue, 25 Jan 2011 00:46:24 GMT
On Mon, Jan 24, 2011 at 4:43 PM, Ilya Maykov <> wrote:

> Right, but I assume you could still see a race condition where the server
> just failed and zookeeper has not detected the failure yet. So zookeeper
> still thinks it's up, thus the client still thinks it's up, thus the client
> makes an RPC request that is doomed to fail :)

Yes.  That exists.

The case where you select a server and it doesn't connect is a safe special
case.  The client can just try another.

The nastier issue, as you point out, is when the transaction starts but
doesn't complete.

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