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From Prasanth Jayachandran <>
Subject Re: Do we still support hadoop-1.2.x API (-Phadoop-1)?
Date Wed, 29 Apr 2015 00:03:54 GMT
I recently filed 5 issues (HIVE-10430, 10431, 10442, 10443, 10444) related to build breakage
of hadoop-1. There could potentially be more breakage. Some patches were added to reduce the
number of file systems calls to improve performance but with supporting hadoop-1 we cannot
directly use such APIs. Also we are not enforcing hadoop-1 build checks in hive QA to make
sure every commit comes out clean on hadoop-1 and hadoop-2. I think it will be good if we
can focus only hadoop-2. Not only it will simplify development but also will reduce the shims


> On Apr 28, 2015, at 4:40 PM, Owen O'Malley <> wrote:
> It has been three years since Hadoop 2.0.0 was first released and I believe
> that the vast majority of users that want to run Hive 1.x have moved over
> to Hadoop 2.x already. It will dramatically simplify Hive development if we
> drop backwards compatibility with the old Hadoop 1.x line.
> Thanks,
>   Owen

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