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From Jimmy Xiang <jxi...@cloudera.com>
Subject Re: assignment - is master beeing a watchdog useful?
Date Thu, 06 Dec 2012 17:26:00 GMT
Currently, rs doesn't watch the znode.  RS cancels ongoing open after
master tells it so.


On Wed, Dec 5, 2012 at 7:53 PM, Stack <stack@duboce.net> wrote:
> On Wed, Dec 5, 2012 at 6:57 PM, Jimmy Xiang <jxiang@cloudera.com> wrote:
>> If this region server happens to be hot, it may take a while to open
>> it.  If we don't time it out, the server may be even hotter.  If the
>> region server could not open it here, other region servers may not be
>> able to open it either.
> I suppose the master can still 'timeout' the open if the RS is watching the
> znode for the region it is trying to open.  The RS will notice that master
> has assumed control in a callback and can then cancel any ongoing open.
> St.Ack

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