Most viewed questions in Big Data Hadoop

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Can we use different i/p and o/p format classes in mapreduce code?

Yes, InputFormatClass and OutputFormatClass are independent of ...READ MORE

Jul 10, 2019 in Big Data Hadoop by Jimmy
 • 941 views
0 votes
1 answer

Sending hdfs file to a non hadoop cluster

There are different ways to do this. ...READ MORE

Jul 9, 2019 in Big Data Hadoop by Tarun
 • 941 views
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1 answer

ElasticSearch Hadoop Cluster

The elasticsearch Hadoop library is not a ...READ MORE

Jul 2, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 941 views
0 votes
1 answer

Replication and Calculations

Since there are 3 nodes, when we ...READ MORE

Jun 11, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 941 views
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0 answers

How Pig programming gets converted into MapReduce jobs?

Could you please give me a brief ...READ MORE

Feb 21, 2019 in Big Data Hadoop by Neha
 • 6,300 points • 939 views
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2 answers

How does Hadoop/Spark is used for building large analytics report?

The best possible framework for this task ...READ MORE

Aug 7, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 938 views
0 votes
1 answer

when is hadoop useful for an application?

Hadoop is a software framework for storing ...READ MORE

Dec 20, 2021 in Big Data Hadoop by CoderGirl
 • 500 points • 937 views
0 votes
1 answer

How to execute scala programming?

We can execute a Scala program in ...READ MORE

Nov 16, 2020 in Big Data Hadoop by Gitika
 • 65,770 points • 934 views
0 votes
1 answer

How to use scala map as mutable map?

By default, Scala uses an immutable Map. ...READ MORE

Nov 17, 2020 in Big Data Hadoop by Gitika
 • 65,770 points • 933 views
0 votes
1 answer

Parquet File and ORC Table

Hi. @Vikramraj, Regarding your query, I would suggest ...READ MORE

Sep 1, 2020 in Big Data Hadoop by Gitika
 • 65,770 points • 933 views
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0 answers

How to import Flat files in Hadoop using sqoop?

It is possible to import data between ...READ MORE

Apr 9, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 933 views
0 votes
1 answer

How to change the status of Oozie state?

Hi, You can use the command below: $ oozie ...READ MORE

Jun 25, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 932 views
0 votes
1 answer

Unable to run import script using sqoop

You are writing incorrect command. Please write ...READ MORE

Mar 8, 2019 in Big Data Hadoop by Raj
 • 932 views
0 votes
1 answer

Not able to install yarn on Ubuntu

Seems like your system does not have ...READ MORE

Feb 5, 2019 in Big Data Hadoop by Omkar
 • 69,220 points • 932 views
0 votes
1 answer

Hadoop Namenode start issue

Try restarting the master: $ sudo reboot $ sudo ...READ MORE

May 22, 2019 in Big Data Hadoop by Rishi
 • 930 views
0 votes
1 answer

Hadoop: Reading and Writing Sequencefile using Apis?

public class SequenceFilesTest { @Test ...READ MORE

Nov 9, 2018 in Big Data Hadoop by Omkar
 • 69,220 points • 929 views
0 votes
1 answer

Why Hadoop is not implemented using Message Passing Interface (MPI)?

One of the big features of Hadoop/map-reduce ...READ MORE

Sep 21, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 927 views
0 votes
1 answer

Hadoop MapReduce wordcount "type job is not applicable for the arguments" error

The combiner class is not required in ...READ MORE

Dec 19, 2018 in Big Data Hadoop by Omkar
 • 69,220 points • 926 views
+2 votes
1 answer

How To Configure Tls Encryption For Cloudera Manager?

The Cloudera Connect Partner Program, more than ...READ MORE

Dec 19, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 925 views
0 votes
1 answer

Where does hive stores its table?

With an external table the data itself ...READ MORE

Dec 7, 2020 in Big Data Hadoop by Gitika
 • 65,770 points • 924 views
0 votes
1 answer

How to set pssword based authentication in cassandra?

Hi@akhtar, You can set password to your cassandra ...READ MORE

Apr 1, 2020 in Big Data Hadoop by MD
 • 95,460 points • 924 views
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1 answer

submitJob method in JobClient of Hadoop throws null pointer

I had this problem as well. But when ...READ MORE

Sep 18, 2018 in Big Data Hadoop by Neha
 • 6,300 points • 924 views
+1 vote
1 answer

How does Hadoop process records split across block boundaries?

Interesting question, I spent some time looking ...READ MORE

Dec 7, 2020 in Big Data Hadoop by Gitika
 • 65,770 points • 922 views
0 votes
1 answer

How to Import the complete directory into HDFS?

First, need to create a directory in Hadoop: $ ...READ MORE

Jul 15, 2019 in Big Data Hadoop by Hiran
 • 922 views
0 votes
1 answer

Power of a number in Impala

Suppose you have fetched two values X ...READ MORE

Jun 6, 2019 in Big Data Hadoop by Reshma
 • 919 views
0 votes
1 answer

Method to schedule the number of Mappers and Reducers in a Hadoop MapReduce Tsk.

The number of Mapper tasks for a ...READ MORE

Apr 25, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 918 views
0 votes
1 answer

Setting Job Tracker port in Hue

Open the hue configuration file and under the [[mapred_clusters]] property set ...READ MORE

May 31, 2019 in Big Data Hadoop by Raj
 • 916 views
0 votes
1 answer

How to set authentication for Kerberos in Hue?

To set the authentication for Solr clients ...READ MORE

May 27, 2019 in Big Data Hadoop by Jimmy
 • 916 views
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1 answer

Hadoop on cassandra database

Regarding your question - there is a ...READ MORE

Mar 26, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 914 views
0 votes
1 answer

can we add hadoop in docker or online server or cloud

Hi@Rajan, If you are asking, can we configure hadoop ...READ MORE

May 1, 2020 in Big Data Hadoop by MD
 • 95,460 points • 913 views
0 votes
1 answer

How to set Hbase truncate limit in hue?

Open the Hue configuration file and search for the [hbase] section ...READ MORE

May 27, 2019 in Big Data Hadoop by Harry
 • 913 views
0 votes
1 answer

Amazon AWS Web Services

If you want to limit your hadoop ...READ MORE

Jul 8, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 912 views
0 votes
1 answer

What is relation keyword in pig?

Hey, A relation is a bag of tuples. ...READ MORE

May 6, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 912 views
0 votes
1 answer

Help m setting up a multi node hadoop cluster

I can help you on this one. Requirement: ...READ MORE

Jun 20, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 909 views
0 votes
1 answer

How to set Hue Plugin for JobTracker on a different host?

When the JobTracker and the Hue Server ...READ MORE

May 24, 2019 in Big Data Hadoop by Jishan
 • 908 views
0 votes
1 answer

Using Hadoop for Data Analytics.

Yes, your approach is correct - you ...READ MORE

Sep 28, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 908 views
–1 vote
1 answer

What is shared FS in the standby namenode?

Shared FS Basically implies to the high ...READ MORE

Dec 21, 2018 in Big Data Hadoop by Omkar
 • 69,220 points • 907 views
0 votes
1 answer

What do you understand by Filters in Hbase?

 Hey, Basically,  by allowing users to add limiting ...READ MORE

May 22, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 904 views
0 votes
1 answer

What are the prerequisites to learn Hadoop in java perspective?

In my day job, I've just spent ...READ MORE

Oct 11, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 904 views
0 votes
1 answer

How to write examples to test whether the installation is validated or not?

You have some example jars in your ...READ MORE

Sep 5, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 904 views
0 votes
1 answer

Can I use Amazon Web Services for free?

If you would like to use AWS ...READ MORE

Apr 25, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 903 views
0 votes
1 answer

How does a name-node understand by itself that it is facing a failure?

ZooKeeper-Failover-Controller or in short ZKFC is the ...READ MORE

Mar 27, 2019 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 902 views
–1 vote
1 answer

Not able to execute mapreduce code

Follow the below steps to execute the ...READ MORE

Jan 7, 2019 in Big Data Hadoop by Omkar
 • 69,220 points • 902 views
0 votes
1 answer

Will hadoop replace data warehousing?

Mostly the answer is yes hadoop is ...READ MORE

Apr 4, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 902 views
0 votes
1 answer

Error while creating avrodatafile?

The error you are getting is AvroWrapper class not ...READ MORE

Jan 22, 2019 in Big Data Hadoop by Omkar
 • 69,220 points • 900 views
+1 vote
1 answer

How to change columname in a dataframe

Hi@shanmugam, You can change your column by using ...READ MORE

May 21, 2020 in Big Data Hadoop by MD
 • 95,460 points • 898 views
0 votes
1 answer

what is Region keyword and and store keyword in Hbase?

Hey, In HBase, tables are split into regions ...READ MORE

May 20, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 898 views
0 votes
0 answers

What is Hadoop Cluster?

Cluster is a collection of something, a ...READ MORE

Dec 9, 2021 in Big Data Hadoop by Kavya
 • 700 points • 895 views
0 votes
1 answer

configure Cassendra in Linux system?

Hi@akhtar, To install cassandra in your system, follow ...READ MORE

Apr 1, 2020 in Big Data Hadoop by MD
 • 95,460 points • 895 views
0 votes
1 answer

Is no of block equal no of i/p split, no of container, no of mapper ?

Split size is approximately equal to block ...READ MORE

Jun 20, 2019 in Big Data Hadoop by Ron
 • 895 views
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