Most viewed questions in Big Data Hadoop

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In Hadoop MapReduce, how can i set an Object as the Value for Map output?

Try this and see if it works: public ...READ MORE

Nov 21, 2018 in Big Data Hadoop by Omkar
 • 69,180 points • 1,256 views
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1 answer

Kafka vs Flume

Even though both are used for real-time ...READ MORE

Sep 24, 2018 in Big Data Hadoop by Data_Nerd
 • 2,390 points • 1,256 views
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1 answer

Hortonworks vs Cloudera Architecture Difference

Features Cloudera MapR HortonWorks License Commercial Commercial Open-Source Community Yes Yes Yes SQL Impala Hive, Drill, Shark Stinger MapReduce Yes Yes Yes Unique Features Cloudera Manager Direct Access NFS 100% ...READ MORE

Jul 27, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 1,256 views
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Hadoop installation issue on fedora 24

type jps and check whether namenode and datanode is ...READ MORE

Jan 24, 2019 in Big Data Hadoop by Frankie
 • 9,830 points • 1,253 views
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1 answer

Running Mapreduce on compressed data

It is very straight forward, no need ...READ MORE

Jul 24, 2019 in Big Data Hadoop by Nanda
 • 1,252 views
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How to replace Hive table name?

Yes, it is possible to change the ...READ MORE

May 20, 2019 in Big Data Hadoop by Firoz
 • 1,252 views
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How Sqoop import command works internally?

First when client execute Sqoop import commands through ...READ MORE

Apr 11, 2019 in Big Data Hadoop by Gitika
 • 65,730 points • 1,252 views
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Is it possible to integrate Kdb+ and hadoop?

kdb is a column oriented database plus ...READ MORE

Oct 10, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 1,252 views
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1 answer

Where to check hive -warehouse path?

You can check this path in Hue ...READ MORE

May 23, 2019 in Big Data Hadoop by Reshma
 • 1,250 views
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Hive Precedence Order

SET Command in HIVE The command line –hiveconf ...READ MORE

Jul 9, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 1,250 views
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1 answer

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
 • 13,490 points • 1,250 views
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1 answer

Which is the best online Big Data Hadoop course?

Hi@akhtar, As you are a beginner, you should ...READ MORE

May 15, 2020 in Big Data Hadoop by MD
 • 95,460 points • 1,249 views
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How to use jar file without putting it in hdfs?

If by "using", you mean distributing it, ...READ MORE

Dec 6, 2018 in Big Data Hadoop by Omkar
 • 69,180 points • 1,248 views
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Failed to upgrade the metastore in Hive?

Hey, If the problem you are having do the ...READ MORE

May 30, 2019 in Big Data Hadoop by Gitika
 • 65,730 points • 1,247 views
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Which java class handles the output record encoding into files which result from Hive queries?

Hey, This particular class handles the output record ...READ MORE

Jun 26, 2019 in Big Data Hadoop by Gitika
 • 65,730 points • 1,245 views
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1 answer

How does decreasing the block size make more space on Datanode?

When there is space in data nodes ...READ MORE

Jul 5, 2019 in Big Data Hadoop by Krish
 • 1,244 views
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1 answer

How to see a running workflow, coordinate or bundle of job in Oozie?

Hey, You can use this example to see, $ ...READ MORE

Jun 18, 2019 in Big Data Hadoop by Gitika
 • 65,730 points • 1,244 views
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Example or Use Case of Big Data

Let me answer your questions one by ...READ MORE

Aug 9, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 1,244 views
0 votes
1 answer

What are the different hdfs dfs commands to perform copy operation?

The different hdfs dfs commands to perform ...READ MORE

Apr 10, 2019 in Big Data Hadoop by Gitika
 • 65,730 points • 1,242 views
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1 answer

How to create external Hive table?

It's simple. You just have to add external ...READ MORE

Dec 14, 2018 in Big Data Hadoop by Omkar
 • 69,180 points • 1,241 views
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1 answer

Determining HDFS space in a cluster?

There are two ways to determine available ...READ MORE

Aug 16, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 1,241 views
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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
 • 9,350 points • 1,240 views
0 votes
1 answer

How is a file written in hdfs?

When you copy a file from the ...READ MORE

Dec 21, 2018 in Big Data Hadoop by Omkar
 • 69,180 points • 1,239 views
0 votes
1 answer

How to remove table scope operators in HBase?

Hi,  Using alter, you can set and remove ...READ MORE

Jun 21, 2019 in Big Data Hadoop by Gitika
 • 65,730 points • 1,238 views
0 votes
1 answer

I was installing Hadoop for windows everything went smoothly but when I tried to format NameNode it displayed an error of failing to start NameNode. What should I do?

Hi@alex, You may set the wrong IP in ...READ MORE

Oct 12, 2020 in Big Data Hadoop by MD
 • 95,460 points • 1,237 views
0 votes
1 answer

Getting some warning/error while loading java file using Hbase commands

In your code, you have set some ...READ MORE

Dec 14, 2018 in Big Data Hadoop by Omkar
 • 69,180 points • 1,235 views
0 votes
1 answer

JobTracker Task Scheduling

The task tracker send out heartbeat messages ...READ MORE

Jun 5, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 1,234 views
–1 vote
1 answer

Changing map and reduce slots

Follow these steps to set the map ...READ MORE

Jan 5, 2019 in Big Data Hadoop by Omkar
 • 69,180 points • 1,232 views
0 votes
1 answer

How can you Check the xml definition of a Workflow, Coordinator or Bundle Job in Oozie?

Hey, You can use this example so that ...READ MORE

Jun 24, 2019 in Big Data Hadoop by Gitika
 • 65,730 points • 1,231 views
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1 answer

How to secure thrift server crash if receives invalid data?

Hey, The Thrift server may crash if it ...READ MORE

May 29, 2019 in Big Data Hadoop by Gitika
 • 65,730 points • 1,231 views
0 votes
1 answer

What are the site-specific configuration files in Hadoop?

There are different site specific configuration to ...READ MORE

Apr 10, 2019 in Big Data Hadoop by Gitika
 • 65,730 points • 1,230 views
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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
 • 9,350 points • 1,230 views
0 votes
1 answer

How to run Nutch in Hadoop installed in pseudo-distributed mode

Make sure you have built Nutch from ...READ MORE

Jan 24, 2019 in Big Data Hadoop by Frankie
 • 9,830 points • 1,229 views
0 votes
1 answer

All daemons starting except datanode

There could be more than one reason ...READ MORE

Dec 21, 2018 in Big Data Hadoop by Omkar
 • 69,180 points • 1,229 views
0 votes
1 answer

How to include third party library in Python MapReduce?

Problem has been solved by zipimport. Then I zip chardet to ...READ MORE

Nov 27, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 1,229 views
0 votes
1 answer

What are the security guidelines for Impala?

Security Guidelines for Impala: The following are the ...READ MORE

Aug 6, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 1,229 views
0 votes
1 answer

Unable to instantiate hive metastore

To resolve this issue, follow the steps ...READ MORE

Jul 5, 2019 in Big Data Hadoop by Ritu
 • 1,227 views
0 votes
1 answer

Custom setting of MapReduce tasks in HIVE

When we set number of mappers to ...READ MORE

Jun 19, 2019 in Big Data Hadoop by Ferry
 • 1,224 views
0 votes
1 answer

What is big data engineering

Data engineer roles have recently become more ...READ MORE

Feb 4, 2022 in Big Data Hadoop by surbhi
 • 3,820 points • 1,223 views
0 votes
1 answer

Integration of hbase

For HBase Pig integration, you can refer ...READ MORE

Jul 9, 2019 in Big Data Hadoop by Kiran
 • 1,223 views
0 votes
1 answer

Is Hadoop a good open-source project to join?

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

Apr 12, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 1,221 views
–1 vote
1 answer

Hdfs command to see available free space in hdfs

Yes, you check the free space using ...READ MORE

Jan 22, 2019 in Big Data Hadoop by Omkar
 • 69,180 points • 1,220 views
0 votes
1 answer

Is it possible to run Apache Spark without Apache Hadoop?

First of all, Let us get a ...READ MORE

Jun 17, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 1,219 views
0 votes
1 answer

To locate the HBase data cell which three co-ordinate is used ?

Hey,  HBase uses the coordinates to locate a ...READ MORE

May 29, 2019 in Big Data Hadoop by Gitika
 • 65,730 points • 1,215 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 • 1,214 views
0 votes
1 answer

ERROR: Stop Oozie first.

Hey, Actually the problem was that tomcat aborted abnormally and ...READ MORE

Jun 25, 2019 in Big Data Hadoop by Gitika
 • 65,730 points • 1,213 views
0 votes
1 answer

How Dumb operator used in pig?

Hey, The Dumb operator is used to run the pig ...READ MORE

May 7, 2019 in Big Data Hadoop by Gitika
 • 65,730 points • 1,213 views
0 votes
1 answer

How to create table inside database in MySql in Linux?

We can use this command to create ...READ MORE

Apr 16, 2019 in Big Data Hadoop by Gitika
 • 65,730 points • 1,213 views
0 votes
0 answers

wordcount example not running on edureka vm

Hi, wordcount example failing on edureka vm(VM is ...READ MORE

Dec 25, 2018 in Big Data Hadoop by PRASAD
 • 120 points • 1,213 views
0 votes
1 answer

Hadoop: Java code to get Hive table properties.

You can try this: org.apache.hadoop.hive.metastore.api.Table table=..........; org.apache.hadoop.hive.metastore.api.StorageDescriptor sd=table.getSd(); String loc=sd.getLocation(); String ...READ MORE

Nov 21, 2018 in Big Data Hadoop by Omkar
 • 69,180 points • 1,212 views
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