th.
>> > > >
>> > > > As implementation already supports the compatibility (through
>> > protobuf),
>> > > > No extra code changes required to support new Client + old server.
>> > > >
>> > > > I feel it will be
Chris Nauroth [mailto:cnaur...@hortonworks.com]
> > Sent: 20 March 2014 05:36
> > To: common-...@hadoop.apache.org
> > Cc: mapreduce-dev@hadoop.apache.org; hdfs-...@hadoop.apache.org;
> > yarn-...@hadoop.apache.org
> > Subject: Re: [DISCUSS] Clarification on Compatibility Po
inayakumar B
>
> -Original Message-
> From: Chris Nauroth [mailto:cnaur...@hortonworks.com]
> Sent: 20 March 2014 05:36
> To: common-...@hadoop.apache.org
> Cc: mapreduce-dev@hadoop.apache.org; hdfs-...@hadoop.apache.org;
> yarn-...@hadoop.apache.org
> Subject: Re: [DISCUSS] Clari
...@hortonworks.com]
Sent: 20 March 2014 05:36
To: common-...@hadoop.apache.org
Cc: mapreduce-dev@hadoop.apache.org; hdfs-...@hadoop.apache.org;
yarn-...@hadoop.apache.org
Subject: Re: [DISCUSS] Clarification on Compatibility Policy: Upgraded Client +
Old Server
I think this kind of compatibility
I think this kind of compatibility issue still could surface for HDFS,
particularly for custom applications (i.e. something not executed via
"hadoop jar" on a cluster node, where the client classes ought to be
injected into the classpath automatically). Running DistCP between 2
clusters of differe
It makes sense only for YARN today where we separated out the clients. HDFS is
still a monolithic jar so this compatibility issue is kind of invalid there.
+vinod
On Mar 19, 2014, at 1:59 PM, Chris Nauroth wrote:
> I'd like to discuss clarification of part of our compatibility policy.
> Here i
+1 on supporting new clients with old servers of the same major version,
and updating the policy to capture that clearly.
On Wed, Mar 19, 2014 at 1:59 PM, Chris Nauroth wrote:
> I'd like to discuss clarification of part of our compatibility policy.
> Here is a link to the compatibility document
I'd like to discuss clarification of part of our compatibility policy.
Here is a link to the compatibility documentation for release 2.3.0:
http://hadoop.apache.org/docs/r2.3.0/hadoop-project-dist/hadoop-common/Compatibility.html#Wire_compatibility
For convenience, here are the specific lines in
