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Date: Thu, 3 Oct 2013 20:40:53 +0330
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Subject: cassandra mapreduce column is nul
From: Anseh Danesh <anseh.danesh@gmail.com>
To: user@cassandra.apache.org
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Hi all.. I am pretty new to cassandra. I write a mapreduce program that
read data from my cassandra columnfamily. My column value is date type but
I import it in cassandra as varchar. when I specify my date column (or any
other column) as source column to read the dates as map function and assign
it to a column of type IColumn and execute the System.out.println(column)
in shows me a lot of null..
in my log side, the map input records is correct and is the same as the
number of my column family rows but others is 0..
also, my columnfamily has 12 columns. I try this mapreduce program with a
smaller table hat has about 2 or 3 columns and it works and print the
column and column values. but it didn't work with my table.. what should I
do? may the problem is from the number of columns?
thanks..

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<div dir=3D"ltr"><div>Hi all.. I am pretty new to cassandra. I write a mapr=
educe program that read data from my cassandra columnfamily. My column valu=
e is date type but I
 import it in cassandra as varchar. when I specify my date column (or any o=
ther column) as=20
source column to read the dates as map function and assign it to a=20
column of type IColumn and execute the System.out.println(column) in=20
shows me a lot of null..
<br>in my log side, the map input records is correct and is the same as the=
 number of my column family rows but others is 0..
<br></div><div>also, my columnfamily has 12 columns. I try this mapreduce p=
rogram with a smaller table hat has about 2 or 3 columns and it works and p=
rint the column and column values. but it didn&#39;t work with my table.. w=
hat should I do? may the problem is from the number of columns?<br>
</div><div>thanks..<br></div></div>

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