Most voted questions in Big Data Hadoop

0 votes
5 answers

What is the HDFS command to list all the files in HDFS according to the timestamp?

You can try filter using value in ...READ MORE

Dec 7, 2018 in Big Data Hadoop by Lenny
 • 71,363 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
 • 13,490 points • 898 views
0 votes
1 answer

How do I include all the Hadoop dependencies using Maven?

This is a dependency mismatch error. I ...READ MORE

Apr 10, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 6,057 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
 • 2,650 points • 912 views
0 votes
2 answers

What is a container in YARN?

Yarn container are a process space where ...READ MORE

May 2, 2020 in Big Data Hadoop by anonymous
 • 6,376 views
0 votes
1 answer

IDE for writing and running hadoop jobs?

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

Apr 10, 2018 in Big Data Hadoop by kurt_cobain
 • 9,390 points • 1,637 views
0 votes
1 answer

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
 • 9,390 points • 1,502 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
 • 11,380 points • 1,428 views
0 votes
3 answers

Cloudera Hadoop - Daemons not running

Please run below mentioned command. It will ...READ MORE

Aug 7, 2018 in Big Data Hadoop by Priyaj
 • 58,090 points • 2,375 views
0 votes
1 answer

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
 • 9,390 points
edited Apr 6, 2018 by kurt_cobain • 1,828 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
 • 9,390 points • 1,559 views
0 votes
1 answer

which one to choose for log analysis?

It is not about that you can ...READ MORE

Apr 6, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 560 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
 • 11,380 points • 660 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
 • 11,380 points • 1,565 views
0 votes
1 answer

What is the use of sequence file in Hadoop?

Sequence files are binary files containing serialized ...READ MORE

Apr 6, 2018 in Big Data Hadoop by Ashish
 • 2,650 points • 9,246 views
0 votes
1 answer

Writing File into HDFS using spark scala

The reason you are not able to ...READ MORE

Apr 6, 2018 in Big Data Hadoop by kurt_cobain
 • 9,390 points • 16,847 views
0 votes
1 answer

How to get started with Hadoop and do some development using Eclipse IDE?

Alright, there are couple of things that ...READ MORE

Apr 4, 2018 in Big Data Hadoop by Ashish
 • 2,650 points • 1,794 views
0 votes
1 answer

How to retrieve the list of sql (Hive QL) commands that has been executed in a hadoop cluster?

Well, what you can do is use ...READ MORE

Apr 4, 2018 in Big Data Hadoop by kurt_cobain
 • 9,390 points • 13,741 views
0 votes
1 answer

Avro - Getting Started

Refer to the example given here. It's ...READ MORE

Apr 4, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 489 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
 • 11,380 points • 971 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
 • 9,390 points • 410 views
0 votes
1 answer

Examples of real world big data open source applications

If you are looking for big data ...READ MORE

Apr 4, 2018 in Big Data Hadoop by kurt_cobain
 • 9,390 points • 936 views
0 votes
1 answer

Hadoop: TaskTracker and JobTracker don't start with start-dfs.sh

You must run the start-dfs..sh too. So when ...READ MORE

Apr 4, 2018 in Big Data Hadoop by kurt_cobain
 • 9,390 points • 1,252 views
0 votes
1 answer

When hadoop-env.sh will be executed in hadoop

Yes you need to put in the ...READ MORE

Apr 3, 2018 in Big Data Hadoop by kurt_cobain
 • 9,390 points • 1,066 views
0 votes
1 answer

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
 • 2,650 points • 2,017 views
0 votes
1 answer

Error running hadoop mapreduce in Python using Hadoop Streaming

Hi As you write mapper and reducer program  ...READ MORE

Jan 21, 2020 in Big Data Hadoop by anonymous
 • 2,244 views
0 votes
1 answer

What Distributed Cache is actually used for in Hadoop?

Basically distributed cache allows you to cache ...READ MORE

Apr 3, 2018 in Big Data Hadoop by Ashish
 • 2,650 points • 1,875 views
0 votes
1 answer

Where is Hadoop Classpath?

It is set in hadoop-config.sh. You can add ...READ MORE

Apr 2, 2018 in Big Data Hadoop by kurt_cobain
 • 9,390 points • 4,256 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
 • 9,390 points • 6,077 views
0 votes
1 answer

How to practice programming with Hadoop?

Well there are multiple ways to solve ...READ MORE

Mar 30, 2018 in Big Data Hadoop by kurt_cobain
 • 9,390 points • 2,690 views
0 votes
1 answer

How hadoop mapreduce job is submitted to worker nodes?

Alright, I think you are basically looking ...READ MORE

Mar 30, 2018 in Big Data Hadoop by Ashish
 • 2,650 points • 5,332 views
0 votes
1 answer

How to start working on Hadoop?

Ok, so basically, you are looking forward ...READ MORE

Mar 30, 2018 in Big Data Hadoop by kurt_cobain
 • 9,390 points • 674 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 30, 2018 in Big Data Hadoop by Ashish
 • 2,650 points • 2,346 views
0 votes
1 answer

Why we are configuring mapred.job.tracker in YARN?

I really dont know the reason behind ...READ MORE

Mar 29, 2018 in Big Data Hadoop by Ashish
 • 2,650 points • 1,642 views
0 votes
1 answer

What is the benefit of using CDH over other Distributors?

CDH is basically a packaged deal, where ...READ MORE

Mar 29, 2018 in Big Data Hadoop by kurt_cobain
 • 9,390 points • 463 views
0 votes
1 answer

Is there a good online tutorial for Hadoop development on a Windows 7 machine?

I would suggest you go through this ...READ MORE

Mar 29, 2018 in Big Data Hadoop by kurt_cobain
 • 9,390 points • 411 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
 • 11,380 points • 2,583 views
0 votes
11 answers

What is the default Namenode port of HDFS. Is it 8020 or 9000 or 50070?

8020/9000 hadoop namenode metadata port number. or ...READ MORE

Dec 31, 2018 in Big Data Hadoop by SM
 • 60,148 views
0 votes
1 answer

What is difference between Oozie workflow, coordinator and bundle ?

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

Mar 29, 2018 in Big Data Hadoop by kurt_cobain
 • 9,390 points • 2,815 views
0 votes
1 answer

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

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

Mar 29, 2018 in Big Data Hadoop by kurt_cobain
 • 9,390 points • 2,861 views
0 votes
1 answer

hadoop: command not found

The reason you are getting hadoop as ...READ MORE

Mar 28, 2018 in Big Data Hadoop by kurt_cobain
 • 9,390 points • 13,583 views
0 votes
1 answer

How to learn Big Data and Ecosystem ?

First understand Big Data and challenges associated ...READ MORE

Mar 27, 2018 in Big Data Hadoop by kurt_cobain
 • 9,390 points • 684 views
0 votes
1 answer

Is it possible to only install Hadoop HDFS?

First of all think of Hadoop as ...READ MORE

Mar 27, 2018 in Big Data Hadoop by kurt_cobain
 • 9,390 points • 1,135 views
0 votes
1 answer

How does the HDFS Client knows the block size while writing?

HDFS is designed in a way where ...READ MORE

Mar 27, 2018 in Big Data Hadoop by kurt_cobain
 • 9,390 points • 888 views
0 votes
1 answer

What is Hadoop Distribution ?

Some companies release or sell products that ...READ MORE

Mar 27, 2018 in Big Data Hadoop by kurt_cobain
 • 9,390 points • 691 views
0 votes
1 answer

Hadoop absolute path - pwd ?

"hdfs dfs -pwd" does not exist because ...READ MORE

Mar 27, 2018 in Big Data Hadoop by kurt_cobain
 • 9,390 points • 8,340 views
0 votes
1 answer

Hadoop on Windows - Training

If your primary objective is to learn ...READ MORE

Mar 27, 2018 in Big Data Hadoop by kurt_cobain
 • 9,390 points • 821 views
0 votes
1 answer

How to programmatically access hadoop cluster where kerberos is enable?

Okay,here's the code snippet to work in the ...READ MORE

Mar 27, 2018 in Big Data Hadoop by coldcode
 • 2,080 points • 7,058 views
0 votes
1 answer

Other Distributed Alternatives to Big Data Hadoop

Yes, there are lot of alternatives to ...READ MORE

Mar 27, 2018 in Big Data Hadoop by coldcode
 • 2,080 points • 679 views
0 votes
1 answer

Moving data to hdfs using copyFromLocal command

Actually dfs.data.dir and dfs.name.dir have to point ...READ MORE

Mar 27, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 9,631 views
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