sqoop-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Mark Grover <m...@apache.org>
Subject Re: How does sqoop export detect Avro schema?
Date Mon, 02 Mar 2015 00:30:25 GMT
Forgot to mention, here's the error I am getting:
https://gist.github.com/markgrover/113196fecd1ec5bd0b38

And, please include me on cc. I am not on the list. Thanks again!

On Sun, Mar 1, 2015 at 4:29 PM, Mark Grover <mark@apache.org> wrote:

> Hi Sqoop folks,
> I am trying to better understand how sqoop export works.
>
> In the sqoop export command, we don't put any information about the
> metadata of the HDFS data being exported. So, how does sqoop figure out the
> avro schema of the data being exported?
>
> Does it use Kite's .metadata directory for this? If so, that'd mean you
> can't export data not populated by Kite. I don't think that's the case.
> Does it parse our the file header or look at file extensions? If so, that
> doesn't work, I just populated an hive table which stores data in avro, and
> it's file extension is not avro.
> Does it do something else that I am missing?
>
> I created a Hive avro table using some new syntax supported in Hive 0.14+:
>
> CREATE EXTERNAL TABLE avg_movie_rating2(movie_id INT, rating DOUBLE)
> STORED AS AVRO
> LOCATION '/data/movielens/aggregated_ratings'
>
> And, I just haven't been able to get Sqoop to be able to export that data.
> Here's the sqoop export command that I ran:
>
> sqoop export --connect \
> jdbc:mysql://mgrover-haa-2.vpc.cloudera.com:3306/movie_dwh \
> --username root --table avg_movie_rating --export-dir \
> /data/movielens/aggregated_ratings -m 16 \
> --update-key movie_id --update-mode allowinsert
>
> Any thoughts/insights would be much appreciated!
>
> Thanks!
> Mark
>

Mime
View raw message