Trending questions in Big Data Hadoop

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How to use mountable HDFS on Centos?

Hey. You can use the following commands ...READ MORE

Nov 26, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 1,827 views
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1 answer

Mapreduce shuffle and sort

The mapreduce task happens in the following ...READ MORE

Dec 27, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 477 views
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What is distributed Cache in MapReduce Framework ?

Distributed Cache is an important feature provided ...READ MORE

Dec 7, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 1,367 views
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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 • 604 views
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1 answer

How to extract only few lines of data from HDFS?

Here also in case of Hadoop, it is ...READ MORE

May 2, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 10,794 views
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Can't seem to make hdfs commands to work

Check the ip address mentioned in core-site.xml ...READ MORE

Dec 21, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 765 views
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Not able to start jobtracker in hadoop

There is no jobtracker in hadoop 2.2.0 YARN framework. ...READ MORE

Dec 11, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 1,139 views
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1 answer

What is local file System?

LocalFS means it may be your LinuxFS ...READ MORE

Dec 11, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 1,132 views
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1 answer

Transfer data between 2 Tables having issues with Date conversion from string to Date datatype.

This can be solved making use of ...READ MORE

Dec 28, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 381 views
–1 vote
1 answer

Facing the below error while installing mysql in VM

We would like to say that the ...READ MORE

Dec 21, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 704 views
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Datanode not running and not able start

Please type the below command in the ...READ MORE

Dec 20, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 705 views
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1 answer

Sqoop import not working

The error you are getting is because ...READ MORE

Dec 18, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 788 views
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1 answer

Hadoop regarding input split

Hadoop framework divides a large file into ...READ MORE

Dec 27, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 400 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 • 11,168 views
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1 answer

Hadoop Hive partitioning

Partitioning: Hive has been one of the preferred ...READ MORE

Dec 14, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 955 views
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Not able to install hadoop using maven

First make sure you have ant installed ...READ MORE

Dec 6, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 1,253 views
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1 answer

Which side join is taken by default by hive? Map-side or Reduce-side?

The syntax for Map-side join and Reduce-side ...READ MORE

Dec 13, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 944 views
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1 answer

Hadoop MapReduce wordcount "type job is not applicable for the arguments" error

The combiner class is not required in ...READ MORE

Dec 19, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 659 views
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1 answer

Not able to list sqoop jobs

It seems like you are missing a ...READ MORE

Dec 13, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 906 views
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2 answers

How to exit NameNode safe mode?

hadoop dfsadmin -safemode leave READ MORE

Apr 11, 2019 in Big Data Hadoop by anonymous
 • 3,506 views
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1 answer

Cant find slave on ResourceManager Web UI

Seems like it is running on default ...READ MORE

Dec 5, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 1,291 views
0 votes
1 answer

Command to partition table in Hive

Yes, You need to mention the below ...READ MORE

Dec 17, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 732 views
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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
 • 69,210 points • 559 views
0 votes
1 answer

How to connect impala to cloud lab?

impala-shell -i <domain_name>: <port > READ MORE

Dec 13, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 892 views
0 votes
1 answer

How to export file from sqoop to sql table?

For SQOOP export please try below command: bin/sqoop ...READ MORE

Dec 14, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 831 views
–1 vote
1 answer

Namenode start error

Seems like the content in core-site.xml file is ...READ MORE

Dec 26, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 348 views
0 votes
1 answer

Hadoop Data node acknowledgement

Let's understand full write mechanism so that ...READ MORE

Dec 18, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 628 views
+1 vote
1 answer

Do Cloudera’s Products Work With My Existing Data Management Infrastructure?

The Cloudera Connect Partner Program, more than ...READ MORE

Dec 19, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 510 views
0 votes
1 answer

Apache Spark vs MapReduce

Both Spark and Hadoop MapReduce are used ...READ MORE

Dec 19, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 518 views
–1 vote
1 answer

What is shared FS in the standby namenode?

Shared FS Basically implies to the high ...READ MORE

Dec 21, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 505 views
0 votes
1 answer

Executing mapper and reducer individually

This is what happens: Map reduce framework will ...READ MORE

Dec 18, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 543 views
+2 votes
1 answer

How To Configure Tls Encryption For Cloudera Manager?

The Cloudera Connect Partner Program, more than ...READ MORE

Dec 19, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 429 views
–1 vote
1 answer

Is standby node missing in Hadoop 1.0?

Yes, Hadoop 1.0 didn't have standby namenode. ...READ MORE

Dec 21, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 488 views
–1 vote
1 answer

Not able to access hadoop cluster

The issue which you are facing is ...READ MORE

Dec 21, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 438 views
0 votes
1 answer

What is the meaning of Write Ahead Log in Hadoop?

Write Ahead Log (WAL) is a file ...READ MORE

Nov 21, 2018 in Big Data Hadoop by Sunil
 • 1,722 views
–1 vote
1 answer

Hadoop unit not found error

Unfortunately the command that you are giving ...READ MORE

Dec 21, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 424 views
0 votes
1 answer

I want to install snappy on Hadoop 1.2.1. How do I do that?

As per Cloudera, if you install hadoop ...READ MORE

Dec 11, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 821 views
0 votes
1 answer

Unable to set JAVA_HOME path.

Check if bin/start-all.sh doesn't override JAVA_HOME put echo ...READ MORE

Dec 1, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 1,274 views
0 votes
1 answer

How to provide encryption for Cloudera HDFS?

You can provide security to cloudera hdfs by using HDFS ...READ MORE

Dec 21, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 368 views
0 votes
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
 • 69,210 points • 656 views
0 votes
1 answer

How to fix corrupt HDFS FIles?

You can use hdfs fsck / to ...READ MORE

Oct 25, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 2,825 views
0 votes
1 answer

Free Hadoop Cluster Experiments

I doubt if there is something which ...READ MORE

Nov 27, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 1,376 views
0 votes
1 answer

How to Upgrade Apache Hadoop from 2.4.1 to 2.6.0

If the downtime is not an issue, ...READ MORE

Nov 30, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 1,246 views
0 votes
1 answer

Hadoop Pig: java.lang.NoClassDefFoundError: org/apache/hadoop/hbase/filter/Filter

This seems like a problem with the ...READ MORE

Nov 16, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 1,845 views
0 votes
1 answer

Running into an issue while running the mapred job on the server

Try this command hadoop dfs -put /var/tmp/students.txt / hadoop ...READ MORE

Dec 20, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 354 views
0 votes
1 answer

How to use sqoop import?

Here is an example of import command. ...READ MORE

Dec 14, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 610 views
0 votes
1 answer

Hadoop: Datanode not starting correctly

You can do the following method, copy to ...READ MORE

Nov 5, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 2,290 views
0 votes
1 answer

What are the different relational operations in “Pig Latin” you worked with?

Different relational operators are: for each order by fil ...READ MORE

Dec 14, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 607 views
0 votes
1 answer

What is the difference between Hadoop API and Streaming?

Usually we have Map/Reduce pair written in ...READ MORE

Dec 12, 2018 in Big Data Hadoop by Neha
 • 6,300 points • 688 views
0 votes
1 answer

Hadoop mapreduce java: NullPoint Exception

Try this: String cords = it.next().toString(); lattitude = Double.toString((inst.decode(cords))[0]); longitude ...READ MORE

Dec 14, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 586 views
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