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From Jean-Daniel Cryans <jdcry...@apache.org>
Subject Re: CopyTable MR job hangs
Date Tue, 15 Mar 2011 17:10:56 GMT
Strangely enough I did answer that question the day you sent it but it
doesn't show up on the mailing list aggregators even tho gmail marks
it as sent... anyways here's what I said:

It won't work because those versions aren't wire-compatible.

What you can do instead is doing an Export, distcp the files, then do
an Import. If the hadoop versions are different, use the hftp
interface like the distcp documentation recommends.


On Tue, Mar 15, 2011 at 1:11 AM, Eran Kutner <eran@gigya.com> wrote:
> No idea anyone?
> -eran
> On Wed, Mar 2, 2011 at 16:40, Eran Kutner <eran@gigya.com> wrote:
>> Hi,
>> I'm trying to copy data from an older cluster using 0.89 (CDH3b3) to a new
>> one using 0.91 (CDH3b4) using the CopyTable MR job but it always hangs on
>> "map 0% reduce 0%" until eventually the job is killed by Hadoop for not
>> responding after 600 seconds.
>> I verified that it works fine when copying from one table to another on the
>> same cluster and I verified that the servers in the source cluster have
>> network access to those in the destination cluster.
>> Any idea what could be causing it?
>> -eran

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