Latest questions in Big Data Hadoop

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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 • 545 views
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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 • 1,871 views
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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 • 5,221 views
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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 • 1,798 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 • 2,011 views
+1 vote
2 answers

What does hadoop fs -du command gives as output?

du command is used for to see ...READ MORE

Jul 24, 2019 in Big Data Hadoop by Lokesh Singh
 • 5,498 views
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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 • 782 views
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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 • 581 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 • 1,020 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
 • 9,390 points • 572 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 • 1,578 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 • 4,094 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
 • 9,390 points • 1,737 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
 • 9,390 points • 2,011 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
 • 9,390 points • 1,479 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
 • 9,390 points • 619 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
 • 9,390 points • 1,497 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 • 1,528 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 • 2,476 views
0 votes
1 answer

Are some Pig real time use cases available?

You can refer to this website https://acadgild.com/blog/pig-u ...READ MORE

Apr 21, 2018 in Big Data Hadoop by kurt_cobain
 • 9,390 points • 673 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
 • 9,390 points • 623 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
 • 9,390 points • 1,172 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
 • 9,390 points • 579 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
 • 9,390 points • 729 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
 • 9,390 points • 1,396 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
 • 9,390 points • 11,185 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
 • 9,390 points • 406 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
 • 9,390 points • 1,315 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 • 3,585 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 • 859 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 • 8,376 views
0 votes
2 answers

hadoop copy a local file system folder to HDFS

There's a typo in your command: "hadopp". ...READ MORE

Feb 4, 2019 in Big Data Hadoop by Lohith
 • 24,546 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 • 471 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 • 879 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 • 674 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 • 8,064 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 • 883 views
0 votes
2 answers

Download & Install Cloudera parcels without being connected to internet?

You can find the details over here ...READ MORE

Aug 16, 2018 in Big Data Hadoop by Priyaj
 • 58,090 points • 1,376 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
 • 9,390 points • 28,833 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 • 3,816 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 • 5,390 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
 • 9,390 points • 660 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
 • 9,390 points • 434 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
 • 9,390 points • 1,262 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
 • 9,390 points • 1,008 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
 • 9,390 points • 822 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 • 1,616 views
0 votes
1 answer

Setting Hive/Hadoop property using Hive Query

You can set Hadoop & Hive conf ...READ MORE

Apr 18, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 1,677 views
0 votes
1 answer

Getting error in Hadoop Streaming: Type mismatch in Key from Map

In Hadoop streaming you have to customize ...READ MORE

Apr 18, 2018 in Big Data Hadoop by coldcode
 • 2,080 points • 1,015 views
0 votes
1 answer

Getting error while building Hadoop core jar using ant.

I think you are missing libtool library. ...READ MORE

Apr 18, 2018 in Big Data Hadoop by coldcode
 • 2,080 points • 777 views
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