Trending questions in Big Data Hadoop

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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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53 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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1,120 views
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When was the first version of Hadoop released?

September 4, 2007 READ MORE

Apr 20, 2018 in Big Data Hadoop by kurt_cobain
• 9,260 points
35 views
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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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34 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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90 views
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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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85 views
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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
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29 views
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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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112 views
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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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62 views
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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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93 views
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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
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93 views
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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
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48 views
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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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79 views
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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
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73 views
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Getting error in Custom Input Format

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

Apr 19, 2018 in Big Data Hadoop by Shubham
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39 views
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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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162 views
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Is there any way to write "map only" Hadoop jobs ?

You can easily set the number of ...READ MORE

Apr 16, 2018 in Big Data Hadoop by nitinrawat895
• 10,730 points
65 views
0 votes
1 answer

In which directory Hadoop should be installed?

You can install Hadoop anywhere. You just ...READ MORE

Apr 16, 2018 in Big Data Hadoop by Shubham
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57 views
0 votes
1 answer

Why Java Code in Hadoop uses own Data Types instead of basic Data types?

Hadoop provides us Writable interface based data ...READ MORE

Apr 15, 2018 in Big Data Hadoop by kurt_cobain
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102 views
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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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100 views
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Where can I find hadoop-streaming.jar JAR file?

You will find the streaming jar here: ...READ MORE

Mar 21, 2018 in Big Data Hadoop by coldcode
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1,187 views
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How to migrate/ change Hadoop 1.x maven project to Hadoop 2.x?

In Hadoop 2.2. most of the dependencies ...READ MORE

Apr 15, 2018 in Big Data Hadoop by kurt_cobain
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80 views
0 votes
1 answer

Is there a way to rebalance single Datanode in Hadoop.

Currently Hadoop does not automatically do this. ...READ MORE

Apr 15, 2018 in Big Data Hadoop by kurt_cobain
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74 views
0 votes
1 answer

How do I parse pdf file using MapReduce?

If you have your own custom InputFormat(WholeFileInputFormat). ...READ MORE

Apr 11, 2018 in Big Data Hadoop by Shubham
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230 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
• 9,260 points
434 views
+1 vote
1 answer

Hadoop Installation Issue on Windows

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

Mar 26, 2018 in Big Data Hadoop by nitinrawat895
• 10,730 points
855 views
0 votes
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Files for Configuring HDFS in Hadoop 2.2.0?

By default these Hadoop configuration files are ...READ MORE

Apr 15, 2018 in Big Data Hadoop by Shubham
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29 views
0 votes
1 answer

Deleting a directory with comma throwing an error

As comma is an escape sequence character, ...READ MORE

Apr 15, 2018 in Big Data Hadoop by Shubham
• 13,310 points
28 views
0 votes
1 answer

Can one implement combiner and reducer separately?

Surely, you can use combiner separately along ...READ MORE

Apr 10, 2018 in Big Data Hadoop by Ashish
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247 views
+1 vote
1 answer

Hadoop home path?

you can manually input the hadoop home ...READ MORE

Mar 26, 2018 in Big Data Hadoop by Ashish
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836 views
0 votes
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How can we transfer a PDF file to HDFS?

You can easily upload any file to ...READ MORE

Apr 13, 2018 in Big Data Hadoop by nitinrawat895
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86 views
0 votes
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How to find hadoop distribution and version?

Just Use the command Hadoop version ...READ MORE

Apr 6, 2018 in Big Data Hadoop by kurt_cobain
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edited Apr 6, 2018 by kurt_cobain 363 views
+1 vote
1 answer

Cassandra and Hadoop - realtime vs batch

Apache Hadoop, is a big data analytics ...READ MORE

Mar 26, 2018 in Big Data Hadoop by nitinrawat895
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758 views
0 votes
1 answer

How to use custom FileInputFormat in MapReduce?

You have to override isSplitable method. ...READ MORE

Apr 10, 2018 in Big Data Hadoop by Shubham
• 13,310 points
149 views
0 votes
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
• 9,260 points
1,215 views
0 votes
1 answer

What is difference between Oozie workflow, coordinator and bundle ?

Workflow does not have time specifications to ...READ MORE

Mar 28, 2018 in Big Data Hadoop by kurt_cobain
• 9,260 points
691 views
0 votes
1 answer

What is a importance of Hive ODBC Connector

The Cloudera ODBC Driver for Hive enables ...READ MORE

Apr 10, 2018 in Big Data Hadoop by kurt_cobain
• 9,260 points
108 views
0 votes
1 answer

IDE for writing and running hadoop jobs?

You can use the Eclipse IDE. It's ...READ MORE

Apr 9, 2018 in Big Data Hadoop by kurt_cobain
• 9,260 points
129 views
0 votes
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How do I print hadoop properties in command line?

You can use the following command to get ...READ MORE

Apr 6, 2018 in Big Data Hadoop by kurt_cobain
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264 views
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Is Hadoop a good open-source project to join?

Yes, Hadoop has a whole ecosystem of ...READ MORE

Apr 11, 2018 in Big Data Hadoop by kurt_cobain
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29 views
0 votes
1 answer

Is java necessary for Hadoop?

It is not a prerequisite. But you ...READ MORE

Apr 11, 2018 in Big Data Hadoop by kurt_cobain
• 9,260 points
21 views
0 votes
1 answer

Not able to start Job History Server in Hadoop 2.8.1

You have to start JobHistoryServer process specifically ...READ MORE

Mar 29, 2018 in Big Data Hadoop by Ashish
• 2,630 points
528 views
0 votes
1 answer

What's the difference between Hadoop and NoSQL ?

Let's start with the definitions Hadoop is an ...READ MORE

Apr 2, 2018 in Big Data Hadoop by kurt_cobain
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349 views
0 votes
1 answer

Apache Hadoop Yarn example program

You can go to this location $Yarn_Home/share/hadoop/mapreduce . You'll ...READ MORE

Apr 4, 2018 in Big Data Hadoop by nitinrawat895
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242 views
0 votes
1 answer

Different ports in a Hadoop cluster environment?

Below image will help you in understanding ...READ MORE

Apr 6, 2018 in Big Data Hadoop by nitinrawat895
• 10,730 points
151 views
0 votes
1 answer

What does Context mean in Hadoop MapR terms ?

The new API makes extensive use of ...READ MORE

Apr 6, 2018 in Big Data Hadoop by nitinrawat895
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140 views
0 votes
1 answer

RDBMS Vs Hadoop

There are various challenges with RDBMS such ...READ MORE

Apr 6, 2018 in Big Data Hadoop by nitinrawat895
• 10,730 points
141 views
0 votes
1 answer

Differences between Hadoop-common, Hadoop-core and Hadoop-client?

To help provide some additional details regarding ...READ MORE

Mar 28, 2018 in Big Data Hadoop by kurt_cobain
• 9,260 points
515 views
0 votes
1 answer

Joining Multiple Spark Dataframes

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

Mar 26, 2018 in Big Data Hadoop by Bharani
• 4,550 points
601 views
0 votes
1 answer

Hdfs Service Systemd - startup

I guess the issue you are facing ...READ MORE

Mar 29, 2018 in Big Data Hadoop by nitinrawat895
• 10,730 points
472 views