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From Jonathan Hsieh <...@cloudera.com>
Subject Re: backporting HBASE-4552 to 0.90
Date Mon, 31 Oct 2011 23:29:35 GMT
I was able to get tests HBASE-4552 specific running on 0.90.x with Andrew's
patch to 0.90 with a minor tweak to the HFile instantiation code and with a
backport of HBASE-3316 (allows Pair to be serialized and sent across the
RPC protocol).

Jon.

On Mon, Oct 31, 2011 at 2:54 PM, Andrew Purtell <apurtell@apache.org> wrote:

> Here is an example of something that might work:
> http://pastebin.com/t9Bbe1F6
>
> My understanding is if you add methods at the end of an interface
> definition, the interface will remain compatible with a client compiled
> against the earlier version.
>
> This is based on our 0.90-ish internal branch so won't match up quite
> right with 0.90. Unit tests still pass. I haven't checked yet if indeed it
> will work with our client apps that use HRI#bulkLoadHFile.
>
>   - Andy
>
> From: Andrew Purtell <apurtell@apache.org>
> >To: "user@hbase.apache.org" <user@hbase.apache.org>; "
> dev@hbase.apache.org" <dev@hbase.apache.org>
> >Sent: Monday, October 31, 2011 1:34 PM
> >Subject: Re: backporting HBASE-4552 to 0.90
> >
> >> Basically if we use the approach in HBASE-4552, rolling restart
> wouldn't work.
> >
> >-1 to an approach that has this outcome.
> >
> >IMO, rolling restart must always be possible on a minor version upgrade.
> >
> >Best regards,
> >
> >
> >   - Andy
> >
> >
> >Problems worthy of attack prove their worth by hitting back. - Piet Hein
> (via Tom White)
> >
> >
> >>________________________________
> >>From: Ted Yu <yuzhihong@gmail.com>
> >>To: user@hbase.apache.org; dev@hbase.apache.org
> >>Sent: Monday, October 31, 2011 12:57 PM
> >>Subject: backporting HBASE-4552 to 0.90
> >>
> >>Hi,
> >>HBASE-4552 has been integrated to 0.92 and TRUNK.
> >>
> >>From Jonathan:
> >>
> >>I was leaning towards either
> >>1) deprecating and keeping the old methods in it in (keeping old rpc
> >>version)
> >>2) having a patch available but in not including in an official 0.90
> since
> >>it breaks compatibility
> >>
> >>Basically if we use the approach in HBASE-4552, rolling restart wouldn't
> >>work.
> >>
> >>I want to get your opinion on how it should be backported to 0.90
> >>
> >>Thanks
> >>
> >>
> >>
> >
> >
>



-- 
// Jonathan Hsieh (shay)
// Software Engineer, Cloudera
// jon@cloudera.com

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