Trending questions in Big Data Hadoop

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Hadoop Installation Issue on Windows

Below is the main error you are ...READ MORE

Mar 26, 2018 in Big Data Hadoop by nitinrawat895
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1,644 views
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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
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588 views
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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
• 9,310 points
546 views
0 votes
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Setting Hive/Hadoop property using Hive Query

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

Apr 18, 2018 in Big Data Hadoop by Shubham
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589 views
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Replication Factor in Hadoop?

If you have provided a replication factor ...READ MORE

Apr 18, 2018 in Big Data Hadoop by kurt_cobain
• 9,310 points
567 views
0 votes
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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
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303 views
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What is the difference between a zero reducer and identity reducer in Hadoop Mapreduce?

A Zero reducer as the name suggests ...READ MORE

Apr 10, 2018 in Big Data Hadoop by kurt_cobain
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901 views
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1 answer

Cassandra for datawarehouse

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

Apr 20, 2018 in Big Data Hadoop by kurt_cobain
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462 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
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170 views
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What are the various ways to import files into HDFS?

There are various tools and frameworks available ...READ MORE

Apr 13, 2018 in Big Data Hadoop by nitinrawat895
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754 views
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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
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63 views
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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
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331 views
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Getting error in command hdfs dfs -mkdir

You are getting this error because the ...READ MORE

Apr 15, 2018 in Big Data Hadoop by Shubham
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653 views
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Types of Hadoop Clusters

Below is the difference given between Standalone, ...READ MORE

Mar 26, 2018 in Big Data Hadoop by nitinrawat895
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1,496 views
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What are the advantages & disadvantages of Hadoop Dockerization?

As you are already having a Hadoop ...READ MORE

Apr 18, 2018 in Big Data Hadoop by coldcode
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494 views
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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
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143 views
0 votes
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I am getting error while starting the Hadoop Daemons i.e. ResourceManger & NodeManager in Hadoop 3

According to me the error is because ...READ MORE

Apr 15, 2018 in Big Data Hadoop by Shubham
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604 views
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Which is better Neo4j or HBASE ?

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

Apr 26, 2018 in Big Data Hadoop by nitinrawat895
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122 views
0 votes
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Getting error in MapReduce job.setInputFormatClass

In old Hadoop API(i.e. below Hadoop 0.20.0), ...READ MORE

Apr 15, 2018 in Big Data Hadoop by Shubham
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578 views
–1 vote
1 answer

Hadoop dfs -ls command?

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

Mar 16, 2018 in Big Data Hadoop by kurt_cobain
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1,880 views
0 votes
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When is an identity mapper/reducer used?

1.One of the simplest example of Iterative ...READ MORE

Apr 3, 2018 in Big Data Hadoop by Ashish
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1,016 views
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Joining Multiple Spark Dataframes

You can run the below code to ...READ MORE

Mar 26, 2018 in Big Data Hadoop by Bharani
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1,360 views
0 votes
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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
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365 views
0 votes
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
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102 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
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265 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
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136 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
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80 views
0 votes
1 answer

How to upload file to HDFS in Ubuntu

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

Apr 18, 2018 in Big Data Hadoop by kurt_cobain
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321 views
0 votes
1 answer

What is Hue?

As you said, Hue is a web ...READ MORE

Mar 22, 2018 in Big Data Hadoop by Ashish
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edited Mar 22, 2018 by Ashish 1,493 views
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Hadoop for data migration

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

Apr 18, 2018 in Big Data Hadoop by kurt_cobain
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276 views
0 votes
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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
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148 views
0 votes
1 answer

How can I use my host machine’s web browser to check my HDFS services running in the VM?

The sole purpose of the virtual machine ...READ MORE

Apr 18, 2018 in Big Data Hadoop by Shubham
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236 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
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188 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
• 13,380 points
182 views
0 votes
1 answer

What are the different ways to load data from Hadoop to Azure Data Lake?

I would recommend you to go through ...READ MORE

Apr 18, 2018 in Big Data Hadoop by coldcode
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189 views
0 votes
1 answer

Are some Pig real time use cases available?

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

Apr 20, 2018 in Big Data Hadoop by kurt_cobain
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97 views
0 votes
1 answer

Hadoop demo Code not working

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

Apr 20, 2018 in Big Data Hadoop by kurt_cobain
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96 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
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181 views
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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
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85 views
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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
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131 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
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129 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
• 13,380 points
159 views
0 votes
1 answer

What does NameNode stores and where it stores?

NameNode records the metadata of all the ...READ MORE

Apr 15, 2018 in Big Data Hadoop by Shubham
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284 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
• 2,050 points
147 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
• 9,310 points
42 views
0 votes
1 answer

Why does my yarn application not have logs even with logging enabled?

yarn application -list command shows you all ...READ MORE

Mar 19, 2018 in Big Data Hadoop by kurt_cobain
• 9,310 points
1,505 views
0 votes
1 answer

Why am I not able to see the Hadoop daemons that are running?

I guess you are starting the services ...READ MORE

Apr 18, 2018 in Big Data Hadoop by Shubham
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121 views
0 votes
1 answer

Why ResourceManager crashes after sometime or while accessing HDFS in Hadoop 2.8.1 and Ubuntu 16.04?

I was facing the same problem and ...READ MORE

Apr 15, 2018 in Big Data Hadoop by Shubham
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235 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
• 13,380 points
69 views
0 votes
1 answer

How to configure secondary namenode in Hadoop 2.x ?

bin/hadoop-daemon.sh start [namenode | secondarynamenode | datanode ...READ MORE

Apr 6, 2018 in Big Data Hadoop by kurt_cobain
• 9,310 points
621 views