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From praveenesh kumar <praveen...@gmail.com>
Subject Re: Hadoop not working after replacing hadoop-core.jar with hadoop-core-append.jar
Date Tue, 07 Jun 2011 03:24:24 GMT
Guys.. just adding to the conversation..I also think that about this
hadoop-append version thing .. I think it should be mentioned in the hadoop
website also..
http://hadoop.apache.org/common/releases.html
There is no mention about hadoop-append release and anything about HDFS that
has a durable sync
Newbies like me .. who first try to learn Hadoop.. either  goes for the
stable version ( e.g. hadoop 0.20.2) or the latest version.. thinking that
it might have covered most of the issues..

And once we get comfortable with it. and put it on our cluster.. and try to
move on to Hbase..then we realized that we need another version to work on
hbase...for which we try to go some other work arounds like this. which
results in emails like this.

Thanks,
Praveenesh

On Tue, Jun 7, 2011 at 5:06 AM, Joe Pallas <joseph.pallas@oracle.com> wrote:

>
> On Jun 6, 2011, at 12:36 PM, Stack wrote:
>
> > In particular, the "...which will take who knows how long
> > and require additional tools and may not work on your preferred
> > development platform" bit.  Michael Noll has written up a nicely
> > detailed instruction on how to build the append branch.  Its cited up
> > front in our doc.  Is it not helpful?  I'd think that readers would
> > give this posting more credence than a "Building sucks" comment made
> > by our Ryan, HBase's (proud!) Statler and Waldorf combined [1].
>
> I agree that Michael's instructions look a lot friendlier.  It's been a
> while since I looked at this part of the book and it is much less daunting
> now.
>
> > HBase will work with the next Hadoop release, 0.22.0, when it comes
> > out [2].  The current state of things is temporary (I believe).  Sorry
> > for the inconvenience.
>
> Good to know.  I had somehow gotten the idea that there was a compatibility
> issue with 0.22 that might not get resolved, but I must have been confused.
>  Or maybe there was a question about whether Hadoop 0.22 would stabilize
> before the HBase 0.92 branch?  In any case, I apologize for making things
> sound worse than they are.
>
> joe
>
>

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