Recent questions tagged mapreduce

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1 answer

How to see the history of Job output-dir in MapReduce?

Jun 14, 2019 in Big Data Hadoop by sahit
 • 774 views
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1 answer

Command to see the status of MapReduce job?

Jun 14, 2019 in Big Data Hadoop by Mahish
 • 2,639 views
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How to print the counter value in MapReduce?

Jun 14, 2019 in Big Data Hadoop by liza
 • 1,024 views
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Command to initiate MapReduce which provide decent UI?

Jun 14, 2019 in Big Data Hadoop by Rachna
 • 408 views
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1 answer

Explain what is WebDAV in Hadoop?

Jun 10, 2019 in Big Data Hadoop by jina
 • 731 views
0 votes
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Explain what does the conf.setMapper Class do?

Jun 10, 2019 in Big Data Hadoop by sekhar
 • 484 views
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Mention what are the main configuration parameters that user need to specify to run MapReduce Job?

Jun 10, 2019 in Big Data Hadoop by sikha
 • 2,065 views
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Explain what is a sequence file in Hadoop?

Jun 10, 2019 in Big Data Hadoop by ranjan
 • 826 views
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Hive queries from mapreduce gives Null Pointer Exception.

Jun 4, 2019 in Big Data Hadoop by Laya
 • 2,373 views
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why do we need MaPReduce in BigData Hadoop?

Jun 3, 2019 in Big Data Hadoop by Rajnish
 • 567 views
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Problem while running MapReduce code.

May 23, 2019 in Big Data Hadoop by Haman
 • 506 views
0 votes
1 answer

MapReduce to count alphabets

May 23, 2019 in Big Data Hadoop by Quill
 • 3,491 views
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1 answer

Map-reduce code for finding average salary

May 22, 2019 in Big Data Hadoop by Janan
 • 3,322 views
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1 answer

How many files can hive create in HDFS duringbMapReduce job?

May 21, 2019 in Big Data Hadoop by Sanam
 • 1,034 views
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How does Hadoop accesses the files which are distributed among different boundaries?

May 7, 2019 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 541 views
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Method to schedule the number of Mappers and Reducers in a Hadoop MapReduce Tsk.

Apr 25, 2019 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 625 views
0 votes
1 answer

Difference between Hadoop Mapreduce in MongoDB versus MangoDB's built-in MapReduce

Apr 24, 2019 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 1,351 views
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1 answer

How can Hadoop process the records that are split across the block boundaries?

Apr 15, 2019 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 3,516 views
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1 answer

I am install hadoop on signal node and run program but delay time if have dataset size 3.3 GB take time about 2 hours

Apr 12, 2019 in Big Data Hadoop by Faris
 • 120 points • 783 views
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hey,can you help me

Apr 11, 2019 in Big Data Hadoop by faris
 • 325 views
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2 answers

Which one among the both MapRed and MapReduce is considered better to create a Hadoop job?

Mar 7, 2019 in Big Data Hadoop by ravi
 • 220 points • 733 views
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1 answer

What is the difference between MapRed and MapReduce?

Mar 6, 2019 in Big Data Hadoop by ravi
 • 220 points • 1,716 views
0 votes
1 answer

Not able to preserve shuffle files in Spark

Feb 24, 2019 in Apache Spark by Rohit
 • 1,243 views
0 votes
1 answer

Why is Spark map output compressed?

Feb 24, 2019 in Apache Spark by Sanam
 • 876 views
0 votes
1 answer

How to run MapReduce program?

Feb 22, 2019 in Big Data Hadoop by Shashi
 • 1,828 views
0 votes
1 answer

Error while accessing the file outformat method SetOutputpath

Feb 22, 2019 in Big Data Hadoop by Esha
 • 492 views
0 votes
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How Pig programming gets converted into MapReduce jobs?

Feb 21, 2019 in Big Data Hadoop by Neha
 • 6,300 points • 688 views
0 votes
1 answer

How to select all columns with group by?

Feb 19, 2019 in Apache Spark by Ishan
 • 13,439 views
0 votes
1 answer

Doubt in word count query

Feb 19, 2019 in Big Data Hadoop by Sanam
 • 340 views
0 votes
1 answer

Failing to execute the script pig file on HDFS

Feb 15, 2019 in Big Data Hadoop by Suri
 • 614 views
0 votes
1 answer

MapReduce: Map Value Mismatch error

Feb 14, 2019 in Big Data Hadoop by Jeeva
 • 704 views
0 votes
1 answer

Error while hitting the hadoop jar command to execute my map reduce

Feb 12, 2019 in Big Data Hadoop by Shravan
 • 1,316 views
0 votes
1 answer

Why should we use "extends Mapper" for Mapreduce code?

Feb 8, 2019 in Big Data Hadoop by Gouri
 • 834 views
0 votes
1 answer

Mapreduce problem with output part file

Feb 7, 2019 in Big Data Hadoop by Neervi
 • 760 views
0 votes
1 answer

How to run mapreduce program in terminal?

Jan 31, 2019 in Big Data Hadoop by Kavi
 • 13,151 views
0 votes
1 answer

How will you submit job as particular user?

Jan 31, 2019 in Big Data Hadoop by Amulya
 • 989 views
0 votes
1 answer

How to decide number of mappers?

Jan 31, 2019 in Big Data Hadoop by Raksha
 • 4,185 views
0 votes
1 answer

expected org.apache.hadoop.io.IntWritable, received org.apache.hadoop.io.LongWritable

Jan 25, 2019 in Big Data Hadoop by George
 • 966 views
–1 vote
1 answer

Does Hadoop merge the output files after reduce phase?

Jan 23, 2019 in Big Data Hadoop by digger
 • 26,740 points • 1,242 views
0 votes
1 answer

Why is using Combiner function not preferred in shuffling?

Jan 23, 2019 in Big Data Hadoop by slayer
 • 29,350 points • 591 views
0 votes
1 answer

How to reduce shuffling cost in map reduce?

Jan 22, 2019 in Big Data Hadoop by slayer
 • 29,350 points • 1,724 views
0 votes
1 answer

How to perform a word count on a dataframe column?

Jan 22, 2019 in Big Data Hadoop by Karan
 • 2,067 views
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1 answer

How does the number of groups affect the cost of the shuffling phase?

Jan 22, 2019 in Big Data Hadoop by anonymous
 • 513 views
–1 vote
1 answer

"main" java.lang.ClassNotFoundException: WordCount

Jan 22, 2019 in Big Data Hadoop by digger
 • 26,740 points • 4,179 views
–1 vote
1 answer

Unable to execute the jar file wordcount.

Jan 21, 2019 in Big Data Hadoop by digger
 • 26,740 points • 2,621 views
–1 vote
1 answer

Hadoop MapReduce word count program failed

Jan 21, 2019 in Big Data Hadoop by digger
 • 26,740 points • 1,014 views
–1 vote
1 answer

Jobtracker and tasktracker is nor running.

Jan 19, 2019 in Big Data Hadoop by digger
 • 26,740 points • 595 views
–1 vote
1 answer

Not able to run java mapreduce

Jan 11, 2019 in Big Data Hadoop by digger
 • 26,740 points • 1,037 views
–1 vote
1 answer

Not able to execute mapreduce code

Jan 7, 2019 in Big Data Hadoop by digger
 • 26,740 points • 475 views
–1 vote
1 answer

Changing map and reduce slots

Jan 5, 2019 in Big Data Hadoop by digger
 • 26,740 points • 819 views
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