hadoop-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From meenakshi Lakshmanan <meena...@yahoo.com>
Subject Re: Creation of an empty output directory in hadoop filesystem
Date Mon, 12 Jan 2015 14:31:41 GMT
This causes ArrayIndexOutOfBound Exception which was the reason to  generate empty directory 
line.substring(i,2) should be line.substring(i,i+2); as substring takes start and end index
as parameters Thanks,

     On Wednesday, January 7, 2015 7:42 PM, Vandana kumari <kvandana1992@gmail.com>

 I had made changes in the file but still nothing happens. Please help i am beginner in this.
kmer.java is attached herewith.

On Wed, Jan 7, 2015 at 7:03 PM, Vandana kumari <kvandana1992@gmail.com> wrote:

yes, there is no compilation error. But thank you for finding mistakes, i will make the above
changes and let you all know.
On Wed, Jan 7, 2015 at 6:52 PM, Shahab Yunus <shahab.yunus@gmail.com> wrote:

Also, in the code that you attached, I see 2 compilation errors. How is it even compiling?
Or am I missing something here?
1- The 'sum' is not declared in the Map class.2- The 'sum' in the Reduce class, when written
to the context needs to be IntWritable and not directly an int.
On Wed, Jan 7, 2015 at 8:18 AM, Shahab Yunus <shahab.yunus@gmail.com> wrote:

First try:
You should use @Override annotation before map and reduce methods so they are actually called.
Like this:@Override public void map(LongWritable k,Text v,Context con)throws IOException,InterruptedException
Do same for 'reduce' method.
On Wed, Jan 7, 2015 at 7:58 AM, Vandana kumari <kvandana1992@gmail.com> wrote:

On Wed, Jan 7, 2015 at 4:16 PM, saurabh chhajed <schhajed.iet@gmail.com> wrote:

Can you attach .java file instead of .class ?

On Wed, Jan 7, 2015 at 4:04 PM, Vandana kumari <kvandana1992@gmail.com> wrote:

Hello all,

I had written a kmer mapreduce program in java. There is no error in the program and while
running it creates an output directory in hadoop file system but that directory is empty.

 Please help to resolve this issue.
Input file(test.txt) and kmer.java is attached herewith.
Thanks and regards  Vandana kumari


|   |
| Saurabh Chhajedsaurzcode.in/ |
|  |

|   |

Thanks and regards  Vandana kumari

Thanks and regards  Vandana kumari

Thanks and regards  Vandana kumari

View raw message