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From: =?ISO-8859-1?Q?Mirko_K=E4mpf?= <mirko.kaempf@gmail.com>
Date: Mon, 28 Oct 2013 16:00:53 +0530
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 <CALKHTG_FNq5EWtyP=ondn5tcnZ2-RayoxPUYjK82d3vDxQqvTA@mail.gmail.com>
Subject: Re: Issues in emitting 2D double array to Reducer.
To: "user@hadoop.apache.org" <user@hadoop.apache.org>
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Hi,

you should create a custom data type, which contains two of the
DoubleArrayWritable instances. This custom data type idea is also explained
here:
http://my.safaribooksonline.com/book/-/9781849517287/4dot-developing-complex-hadoop-mapreduce-applications/ch04s03_html

Good luck.
Mirko


2013/10/28 unmesha sreeveni <unmeshabiju@gmail.com>

>
> http://stackoverflow.com/questions/19602692/java-lang-classcastexception-in-hadoop-mapreduce
>
> I tried out, but it is not working.
>
> I was able to emit 1 2D array..but When i cross checked once more, i am
> not able to print the matrix(2D array) in reducer.
>
> Can anyone suggest me a gud way to emit 2 Matrices from mapper.
>
>
>
> --
> *Thanks & Regards*
> *
> *
> Unmesha Sreeveni U.B*
> *
> *Junior Developer
> *
> *Amrita Center For Cyber Security
> *
> *
> Amritapuri.
>
> www.amrita.edu/cyber/
> *
>

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<div dir=3D"ltr">Hi,=A0<div><br></div><div style>you should create a custom=
 data type, which contains two of the=A0<span style=3D"background-color:tra=
nsparent;color:rgb(43,145,175);font-family:Consolas,Menlo,Monaco,&#39;Lucid=
a Console&#39;,&#39;Liberation Mono&#39;,&#39;DejaVu Sans Mono&#39;,&#39;Bi=
tstream Vera Sans Mono&#39;,&#39;Courier New&#39;,monospace,serif;font-size=
:14px;line-height:18px;text-align:left">DoubleArrayWritable=A0</span>instan=
ces. This custom data type idea is also explained here: <a href=3D"http://m=
y.safaribooksonline.com/book/-/9781849517287/4dot-developing-complex-hadoop=
-mapreduce-applications/ch04s03_html">http://my.safaribooksonline.com/book/=
-/9781849517287/4dot-developing-complex-hadoop-mapreduce-applications/ch04s=
03_html</a></div>

<div style><br></div><div style>Good luck.</div><div style>Mirko</div><div =
style>=A0</div></div><div class=3D"gmail_extra"><br><br><div class=3D"gmail=
_quote">2013/10/28 unmesha sreeveni <span dir=3D"ltr">&lt;<a href=3D"mailto=
:unmeshabiju@gmail.com" target=3D"_blank">unmeshabiju@gmail.com</a>&gt;</sp=
an><br>

<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex"><div dir=3D"ltr"><div class=3D"gmail_default=
"><font face=3D"courier new, monospace"><a href=3D"http://stackoverflow.com=
/questions/19602692/java-lang-classcastexception-in-hadoop-mapreduce" targe=
t=3D"_blank">http://stackoverflow.com/questions/19602692/java-lang-classcas=
texception-in-hadoop-mapreduce</a></font><br clear=3D"all">


</div><div class=3D"gmail_default"><font face=3D"courier new, monospace"><b=
r></font></div><div class=3D"gmail_default"><font face=3D"courier new, mono=
space">I tried out, but it is not working.</font></div><div><br></div><div>=
<div class=3D"gmail_default" style=3D"font-family:&#39;courier new&#39;,mon=
ospace">


I was able to emit 1 2D array..but When i cross checked once more, i am not=
 able to print the matrix(2D array) in reducer.</div><div class=3D"gmail_de=
fault" style=3D"font-family:&#39;courier new&#39;,monospace"><br></div><div=
 class=3D"gmail_default" style=3D"font-family:&#39;courier new&#39;,monospa=
ce">


Can anyone suggest me a gud way to emit 2 Matrices from mapper.</div><span =
class=3D"HOEnZb"><font color=3D"#888888"><div class=3D"gmail_default" style=
=3D"font-family:&#39;courier new&#39;,monospace"><br></div><div class=3D"gm=
ail_default" style=3D"font-family:&#39;courier new&#39;,monospace">


<br></div><br></font></span></div><span class=3D"HOEnZb"><font color=3D"#88=
8888">-- <br><div dir=3D"ltr"><i style=3D"color:rgb(102,0,0)">Thanks &amp; =
Regards</i>
<div style=3D"color:rgb(102,0,0)"><i><br></i></div><div style=3D"color:rgb(=
102,0,0)">Unmesha Sreeveni U.B<i><br></i></div><div style=3D"color:rgb(102,=
0,0)"><i>Junior Developer<br></i></div><div style=3D"color:rgb(102,0,0)"><i=
>Amrita Center For Cyber Security<br>


</i></div><i><span><div><span style=3D"color:rgb(102,0,0)">
Amritapuri.</span><br><br><a href=3D"http://www.amrita.edu/cyber/" target=
=3D"_blank">www.amrita.edu/cyber/</a></div></span></i></div>
</font></span></div>
</blockquote></div><br></div>

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