Input file name in the mapper in a Hadoop program

0 votes
I want the name of the input file within a mapper. There are multiple input files stored in the input directory, each mapper may read a different file, and I need to know which file the mapper has read.
Jul 23, 2019 in Linux Administration by Upasana
• 8,620 points
2,226 views

1 answer to this question.

0 votes

Try this inside your mapper :

FileSplit fileSplit = (FileSplit)context.getInputSplit();
String filename = fileSplit.getPath().getName();

Try this to do it inside configure() through the old API :

String fileName = new String();
public void configure(JobConf job)
{
   filename = job.get("map.input.file");
}
answered Jul 23, 2019 by Shubham
• 13,490 points

Related Questions In Linux Administration

0 votes
1 answer

How to check permissions of a file in the Linux system?

Hi@akhtar, If you prefer using the command line, ...READ MORE

answered Aug 13, 2020 in Linux Administration by MD
• 95,420 points
1,013 views
0 votes
1 answer

How to find the first field from a file in Bash Shell?

Hi@akhtar, You can extract text from a file. ...READ MORE

answered Oct 20, 2020 in Linux Administration by MD
• 95,420 points
463 views
0 votes
1 answer

Is there a limit on the number of words in bash command 'for file in words'?

Anyway, you need to print everything except ...READ MORE

answered May 27, 2022 in Linux Administration by Korak
• 5,820 points
144 views
0 votes
1 answer
+1 vote
1 answer

Hadoop Mapreduce word count Program

Firstly you need to understand the concept ...READ MORE

answered Mar 16, 2018 in Data Analytics by nitinrawat895
• 11,380 points
9,575 views
0 votes
1 answer

hadoop.mapred vs hadoop.mapreduce?

org.apache.hadoop.mapred is the Old API  org.apache.hadoop.mapreduce is the ...READ MORE

answered Mar 16, 2018 in Data Analytics by nitinrawat895
• 11,380 points
1,804 views
+2 votes
11 answers

hadoop fs -put command?

Hi, You can create one directory in HDFS ...READ MORE

answered Mar 16, 2018 in Big Data Hadoop by nitinrawat895
• 11,380 points
89,264 views
–1 vote
1 answer

Hadoop dfs -ls command?

In your case there is no difference ...READ MORE

answered Mar 16, 2018 in Big Data Hadoop by kurt_cobain
• 9,390 points
3,713 views
0 votes
1 answer

Script file name in a Bash script

$0 will give you the complete basename. ...READ MORE

answered Jun 20, 2019 in Linux Administration by Shubham
• 13,490 points
339 views
0 votes
1 answer

Writing a heredoc to a file in a script

try to use tee: tee newfile <<EOF line 1 line 2 line ...READ MORE

answered May 20, 2019 in Linux Administration by Shubham
• 13,490 points
895 views
webinar REGISTER FOR FREE WEBINAR X
REGISTER NOW
webinar_success Thank you for registering Join Edureka Meetup community for 100+ Free Webinars each month JOIN MEETUP GROUP