I'm having an issue very similar to this; I'm not sure exactly what you did
to get the array contents. I've made a new post here:
https://groups.google.com/forum/#!topic/elasticsearch/MpOqKthgqtA
--
Paul Chua
Data Scientist
317-979-5643
[image: cid:02526A0B-9444-47C7-A3EC-12B05A02CB50]
*We
That works fine for me thank you! But I'd also wanted to be able to build
and object from the MapWritable values in the mapper.
Consider values as MapWritable object.
When I try to get a specified value from values.get(title) per example
the returning value is null but the field exists in the
That's because your MapWritables doesn't use Strings as keys but rather
org.apache.hadoop.io.Text
In other words, you can see the data is in the map however you cannot retrieve it since you are using the wrong key (try
inspecting the map object types).
Try values.get(new Text(title))
On
I've tried that. It returns a
org.elasticsearch.hadoop.mr.WritableArrayWritable object. How can I get my
field content out of that?
Le mercredi 3 décembre 2014 14:10:24 UTC+1, Costin Leau a écrit :
That's because your MapWritables doesn't use Strings as keys but rather
You're getting back an array ([Samsung EF-C]) - a Writable wrapper around org.hadoop.io.ArrayWritable (to actually
allow it to be serialized).
So call toStrings() or get() to get its content.
On 12/3/14 3:30 PM, Elias Abou Haydar wrote:
I've tried that. It returns a
I've already tried that. It doesn't work... :/
Le mercredi 3 décembre 2014 16:21:40 UTC+1, Costin Leau a écrit :
You're getting back an array ([Samsung EF-C]) - a Writable wrapper
around org.hadoop.io.ArrayWritable (to actually
allow it to be serialized).
So call toStrings() or get()
I've tried to call toStrings()
I got this :
title : [Ljava.lang.String;@35112ff7
with the get(), i'm getting this:
title : [Lorg.apache.hadoop.io.Writable;@666f5678
Le mercredi 3 décembre 2014 16:21:40 UTC+1, Costin Leau a écrit :
You're getting back an array ([Samsung EF-C]) -
Ok actually Strings() returns the String[] array that has the contents and
that solved my problem.
Thanks again Costin! :)
Le mercredi 3 décembre 2014 16:29:38 UTC+1, Elias Abou Haydar a écrit :
I've tried to call toStrings()
I got this :
title : [Ljava.lang.String;@35112ff7
with
I'm not sure what you are expecting since the results are as expected. See the
javadocs [1] for ArrayWritable.
toStrings() returns a String[] while get() a Writable[]. In other words you get an array of Strings and Writables and
neither
implements toString natively.
To get the actual content
I have actually went through the API and I get the big picture now.
I appreciate your help. Thanks! :)
Le mercredi 3 décembre 2014 16:50:33 UTC+1, Costin Leau a écrit :
I'm not sure what you are expecting since the results are as expected. See
the javadocs [1] for ArrayWritable.
I'm trying to write a mapreduce job where I can query elasticsearch so it
can return to me specific fields. Is there any way to do that?
My mapping contains about 30 fields and I will need just 4 of them
(_id,title,description,category)
The way I was doing it is to process each answer to get
Simply specify the fields that you are interested in, in the query and you are
good to go.
[1]
http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-request-fields.html
On 12/2/14 12:52 PM, Elias Abou Haydar wrote:
I'm trying to write a mapreduce job where I can query
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