Most answered questions in Big Data Hadoop

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Hadoop giving java.io.IOException, in mkdir Java code.

I am not sure about the issue. ...READ MORE

May 3, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 2,961 views
0 votes
1 answer

Hadoop job getting executed in local mode only?

Basically, you have not configured the mapreduce.framework.name ...READ MORE

May 3, 2018 in Big Data Hadoop by Atul
 • 10,240 points • 2,758 views
0 votes
1 answer

Error while copying the file from local to HDFS

Well, the reason you are getting such ...READ MORE

May 3, 2018 in Big Data Hadoop by Ashish
 • 2,650 points • 4,415 views
0 votes
1 answer

How to extract only few lines of data from HDFS?

Here also in case of Hadoop, it is ...READ MORE

May 2, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 12,259 views
0 votes
1 answer

How Sqoop and Tera Data Connector for Hadoop differ from each other?

In order to make use of TD ...READ MORE

May 2, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 1,786 views
0 votes
1 answer

NodeManager is not able to connect to the ResourceManager.

Here, I guess the issue is with ...READ MORE

May 1, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 4,475 views
0 votes
1 answer

What are some of the famous visualization tools which can be integrated with Hadoop & Hive?

I have personally used two visualization tools ...READ MORE

May 1, 2018 in Big Data Hadoop by coldcode
 • 2,090 points • 2,340 views
0 votes
1 answer

What is the function of getLocalCacheArchives method?

We use distributed cache to share those ...READ MORE

Apr 29, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 1,345 views
0 votes
1 answer

What is the command to find the free space in HDFS?

You can use dfsadmin which runs a ...READ MORE

Apr 29, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 2,721 views
0 votes
1 answer

What is the command to navigate in HDFS?

First of all there is no command ...READ MORE

Apr 27, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 6,265 views
0 votes
1 answer

How can I write text in HDFS using CMD?

Hadoop put & appendToFile only reads standard ...READ MORE

Apr 27, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 2,893 views
0 votes
1 answer

Changing hostname in fs.default.name property puts Hadoop in safemode

First of all, in Safe mode the ...READ MORE

Apr 27, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 2,704 views
0 votes
1 answer

Can we use apache Mahout without Hadoop dependency?

There is a number of algorithm implementations ...READ MORE

Apr 26, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 1,597 views
0 votes
1 answer

Which is better Neo4j or HBASE ?

For your requirement, I would recommend you ...READ MORE

Apr 26, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 1,157 views
+1 vote
1 answer

Why is jar file required to execute a MR code instead of class file?

We use hadoop keyword to invoke the ...READ MORE

Apr 24, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 1,604 views
0 votes
1 answer

How to perform Near-real time analytics using Hadoop?

To perform Near-real time analytics, you have ...READ MORE

Apr 24, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 1,168 views
0 votes
1 answer

How do we authenticate user from http.signature.secret file?

hadoop.http.authentication.signature.secret.file: The signature secret file for signing ...READ MORE

Apr 24, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 2,566 views
0 votes
1 answer

What is the slaves file configuration in Hadoop?

The main idea behind is the master ...READ MORE

Apr 24, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 4,976 views
0 votes
1 answer

GUI for using Hadoop

Hue is open source and works well ...READ MORE

Apr 24, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 2,268 views
0 votes
1 answer

Namenode not getting started

You need to delete the contents of the ...READ MORE

Apr 23, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 2,488 views
0 votes
1 answer

How to transfer data from Netezza to HDFS using Apache Sqoop?

Remove the --direct option. It gives issue ...READ MORE

Apr 23, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 2,096 views
0 votes
1 answer

How to checkout Hadoop 2.6.0 from git

Clone the following Git repository: git clone git ...READ MORE

Apr 23, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 1,407 views
0 votes
1 answer

What does count command in Hadoop tells?

The output of the count command are: ...READ MORE

Apr 23, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 2,224 views
0 votes
1 answer

What is the $HIVE_HOME in Hortonworks sandbox

You can find the hive-site.xml file /etc/hive/conf.install/hive-site.xml ...READ MORE

Apr 23, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 1,995 views
0 votes
1 answer

Killing an Application from ResourceManager Web UI

In hadoop v2.7.1, if you open the ...READ MORE

Apr 23, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 3,398 views
0 votes
1 answer

Hadoop demo Code not working

You can use this command: "hadoop fs ...READ MORE

Apr 21, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 1,202 views
0 votes
1 answer

How to work with distributed cache in Hadoop?

The problem with your code is that ...READ MORE

Apr 20, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 1,724 views
0 votes
1 answer

When was the first version of Hadoop released?

September 4, 2007 READ MORE

Apr 20, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 1,048 views
0 votes
1 answer

How to implement data locality in Hadoop MapReduce?

You can use this getFileBlockLocations method of ...READ MORE

Apr 20, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 1,450 views
0 votes
1 answer

How to import data to HBase from SQL server?

You can easily import the data from ...READ MORE

Apr 20, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 1,965 views
+1 vote
1 answer

Why minimum 3 Journal Nodes are required in Hadoop HA architecture?

Initially in Hadoop 1.x, the NameNode was ...READ MORE

Apr 20, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 12,170 views
0 votes
1 answer

Declaring separator in the MapReduce(Hadoop 0.20)

In the new API you have to ...READ MORE

Apr 20, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 879 views
0 votes
1 answer

Cassandra for datawarehouse

Actually, Cassandra being a NoSQL database with ...READ MORE

Apr 20, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 2,061 views
0 votes
1 answer

Difference between Hadoop file system and Linux

Yes, to a certain extent we can ...READ MORE

Apr 20, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 4,487 views
0 votes
1 answer

HortonWorks Hadoop encryption tools and data security

There are many tools available for encrypting ...READ MORE

Apr 20, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 1,514 views
0 votes
1 answer

How to find Hadoop version in CDH?

The simplest way to check Hadoop version ...READ MORE

Apr 19, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 9,723 views
0 votes
1 answer

Getting error in Custom Input Format

Use this property directly to delimit the ...READ MORE

Apr 19, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 992 views
0 votes
1 answer

Error in Hadoop Mapreduce

The file that you are referring here ...READ MORE

Apr 19, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 1,579 views
0 votes
1 answer

How Hadoop replication works?

dfs.replication is by default 3 and you ...READ MORE

Apr 19, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 1,213 views
0 votes
1 answer

Getting error in Hadoop: Output file already exist

When you executed your code earlier, you ...READ MORE

Apr 19, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 9,375 views
0 votes
1 answer

HDFS Location in Hadoop?

Try using the same path where you ...READ MORE

Apr 19, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 1,365 views
0 votes
1 answer

How to groupBy/count then filter on count in Scala

I think the exception is caused because ...READ MORE

Apr 19, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 30,440 views
0 votes
1 answer

Installing Hive & Hadoop in VM

For Hadoop installation, I would recommend you ...READ MORE

Apr 19, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 5,116 views
0 votes
1 answer

How to print the content of a file in console present in HDFS?

Yes, you can use hdfs dfs command ...READ MORE

Apr 19, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 6,415 views
0 votes
1 answer

Hadoop single node cluster set up issues

As far as the error, there's a ...READ MORE

Apr 19, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 1,330 views
0 votes
1 answer

Why Hadoop is tightly bound to linux?

As far as I can tell, using ...READ MORE

Apr 19, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 1,069 views
0 votes
1 answer

How to upload file to HDFS in Ubuntu

you can use  hadoop fs -copyFromLocal  "/home/ritwi ...READ MORE

Apr 19, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 2,125 views
0 votes
1 answer

Map and Reduce task memory settings in Hadoop YARN

It's preferable and generally, it is recommended ...READ MORE

Apr 18, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 1,538 views
0 votes
1 answer

Hadoop for data migration

You can use Hadoop for these kinds ...READ MORE

Apr 18, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 1,654 views
0 votes
1 answer

How to set the number of Map & Reduce tasks?

The map tasks created for a job ...READ MORE

Apr 18, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 2,381 views
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