Most viewed questions in Big Data Hadoop

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1 answer

What is Streaming data and Hadoop?

The hack you describe is more or ...READ MORE

Nov 2, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 1,716 views
0 votes
1 answer

What is Modeling data in Hadoop and how to do it?

I suggest spending some time with Apache ...READ MORE

Sep 19, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 1,716 views
0 votes
1 answer

Hive: Granting roles to groups

You can use the GRANT ROLE statement ...READ MORE

May 31, 2019 in Big Data Hadoop by Roshni
 • 1,714 views
+1 vote
0 answers

Class not found exception in wordcount program in mapreduce

import org.apache.hadoop.conf.Configuration; import org.apache.hadoop.fs.Path; import java.io.IOException; import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat; import org.apache.hadoop.mapreduce.*; import org.apache.hadoop.mapreduce.lib.input.FileInputFormat; import ...READ MORE

Oct 3, 2019 in Big Data Hadoop by Tarun
 • 160 points
edited Oct 3, 2019 by Omkar • 1,713 views
0 votes
1 answer

Why for metastore RDBMS is used?

Hey, Yes, it is correct that Hive is ...READ MORE

May 11, 2019 in Big Data Hadoop by Gitika
 • 65,890 points • 1,713 views
0 votes
1 answer

Hadoop security GroupMappingServiceProvider exception for Spark job via Dataproc API

If you don't want to turn off ...READ MORE

Jul 2, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 1,712 views
0 votes
1 answer

What is Memstore in Hbase?

Hey, In HBase the the store contains memory ...READ MORE

May 21, 2019 in Big Data Hadoop by Gitika
 • 65,890 points • 1,712 views
0 votes
1 answer

ERROR org.apache.hadoop.hdfs.server.namenode.FSNamesystem: FSNamesystem initialization failed. java.io.FileNotFoundException: /app/hadoop/tmp/dfs/name/in_use.lock

Hi, You can change the owner to Hadoop ...READ MORE

Aug 5, 2019 in Big Data Hadoop by Gitika
 • 65,890 points • 1,708 views
0 votes
1 answer

How to store datasets from Pig to HDFS?

Hi Guys, You can store the loaded data ...READ MORE

Oct 15, 2020 in Big Data Hadoop by MD
 • 95,460 points • 1,702 views
0 votes
1 answer

Permission denied while uploading files to hdfs

It is not the problem about permission ...READ MORE

Jan 25, 2019 in Big Data Hadoop by Omkar
 • 69,230 points • 1,701 views
0 votes
1 answer

error:org.apache.flume.sink.hdfs.HDFSEventSink.process(HDFSEventSink.java:456)] HDFS IO error java.io.IOException

Hi@akhtar, There may be problem in firewall, so ...READ MORE

Apr 23, 2020 in Big Data Hadoop by MD
 • 95,460 points • 1,699 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 • 1,697 views
–1 vote
1 answer

IDE Eclipse: Failed to locate the winutils binary in the hadoop binary path

Try this: First, click on file import appliance. Now ...READ MORE

Dec 31, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 1,694 views
0 votes
1 answer

java.lang.NoSuchMethodError: java.util.concurrent.ConcurrentHashMap.keySet()Ljava/util/concurrent/ConcurrentHashMap$KeySetView

Hi@akhtar, I think there is a problem in ...READ MORE

Apr 30, 2020 in Big Data Hadoop by MD
 • 95,460 points • 1,692 views
0 votes
1 answer

Difference between Hadoop Mapreduce in MongoDB versus MangoDB's built-in MapReduce

Let me line up the crucial differences ...READ MORE

Apr 24, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 1,690 views
–1 vote
1 answer

Pig code in Eclipse shows error :LongWritable cannot be resolved to a type

To rectify this errors, you need to ...READ MORE

Jan 2, 2019 in Big Data Hadoop by Omkar
 • 69,230 points • 1,687 views
0 votes
1 answer

HBase shell failed to connect

Enter the below command in the terminal ...READ MORE

Jul 23, 2019 in Big Data Hadoop by Joshua
 • 1,685 views
0 votes
1 answer

How will you choose various file formats for storing and processing data using Apache Hadoop ?

The decision to choose a particular file ...READ MORE

Sep 27, 2018 in Big Data Hadoop by zombie
 • 3,790 points • 1,685 views
0 votes
1 answer

How to access HBase shell and navigate and navigate to the HBase home folder?

Hey, To access the HBase shell, you have ...READ MORE

May 23, 2019 in Big Data Hadoop by Gitika
 • 65,890 points • 1,684 views
0 votes
1 answer

How to Install Cloudera Manager into my Virtual Machine ?

Before you start anything, First make sure ...READ MORE

Aug 9, 2018 in Big Data Hadoop by Neha
 • 6,300 points • 1,682 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
 • 11,380 points • 1,680 views
0 votes
1 answer

FAILEDError: java.io.IOException: Type mismatch in key from map

This error is thrown when the parameters ...READ MORE

Jul 30, 2019 in Big Data Hadoop by Rishi
 • 1,679 views
0 votes
1 answer

Are there any Limitations of Pig?

Limitations of the Apache Pig are: As the ...READ MORE

Jul 6, 2018 in Big Data Hadoop by kurt_cobain
 • 9,390 points • 1,678 views
0 votes
1 answer

How to load data from flat files into different partitions of Hive table?

Hi, You can load data from flat files ...READ MORE

Jun 26, 2019 in Big Data Hadoop by Gitika
 • 65,890 points • 1,675 views
+1 vote
1 answer

Explain to me the difference between Name node and Secondary name node

First of all, let understand what is ...READ MORE

May 15, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 1,672 views
0 votes
1 answer

Hadoop Sqoop: How to change sqoop metastore?

In sqoop-site.xml I configured it with, the ...READ MORE

Nov 13, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 1,672 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 • 1,667 views
0 votes
1 answer

How to change the default replication factor in Hadoop?

Hi@akhtar, You can change the default replication factor from the ...READ MORE

Oct 3, 2020 in Big Data Hadoop by MD
 • 95,460 points • 1,666 views
0 votes
1 answer

Integration of Hadoop with Mongo DB concept

MongoDB isn't built to work on top ...READ MORE

Sep 25, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 1,665 views
0 votes
1 answer

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
 • 9,390 points • 1,663 views
0 votes
1 answer

Explain to me the relationship between Hadoop and Databases.

Okay, that's a lot of queries together, ...READ MORE

May 15, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 1,662 views
0 votes
1 answer

Cant access the Hadoop Namenode from browser

As mentioned in the error, the nodes ...READ MORE

Dec 20, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 1,661 views
+1 vote
1 answer

what are the typicall block sizes in HDFS

HDFS is a block structured file system ...READ MORE

Apr 8, 2019 in Big Data Hadoop by Gitika
 • 65,890 points • 1,660 views
0 votes
2 answers

Is there a .NET equivalent to Apache Hadoop?

Hadoop is a Java-based platform. So, to ...READ MORE

Jul 16, 2020 in Big Data Hadoop by Suhana
 • 340 points • 1,658 views
0 votes
1 answer

How to send curl downloaded data in hdfs?

Try using put command with stdin as ...READ MORE

Jan 25, 2019 in Big Data Hadoop by Omkar
 • 69,230 points • 1,653 views
0 votes
1 answer

How to create smaller table from big table in HIVE?

You could probably best use Hive's built-in sampling ...READ MORE

Sep 24, 2018 in Big Data Hadoop by digger
 • 26,740 points • 1,650 views
0 votes
1 answer

What is Kafka? what is its importance in Big-Data?

Apache Kafka is a tool used in ...READ MORE

Apr 11, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 1,647 views
0 votes
1 answer

Difference between ensemble and quorum in zookeeper?

Hey, When you want to have high availability ...READ MORE

May 25, 2019 in Big Data Hadoop by Gitika
 • 65,890 points • 1,646 views
0 votes
1 answer

What is pig storage and why it is used?

Hello, In pig, there is a default load ...READ MORE

May 8, 2019 in Big Data Hadoop by Gitika
 • 65,890 points
edited May 8, 2019 by Gitika • 1,646 views
0 votes
1 answer

How to use Sqoop in Java Program?

You can run sqoop from inside your ...READ MORE

Nov 19, 2018 in Big Data Hadoop by Neha
 • 6,300 points • 1,643 views
0 votes
2 answers

How do I integrate Kdb+ and hadoop?

 kdb+ could be installed on every Hadoop ...READ MORE

Aug 6, 2018 in Big Data Hadoop by Abhi
 • 3,720 points • 1,641 views
0 votes
1 answer

How to transfer data from Netezza to HDFS using Apache Sqoop?

Remove the --direct option. It gives issue ...READ MORE

Apr 23, 2018 in Big Data Hadoop by kurt_cobain
 • 9,390 points • 1,639 views
0 votes
1 answer

out of Memory Error in Hadoop

You can assign more memory by editing ...READ MORE

Oct 1, 2018 in Big Data Hadoop by slayer
 • 29,370 points • 1,638 views
0 votes
2 answers

Error:- cannot locate pig-core-hr. jar. do ‘ant -Dhadoopversion=23 jar’

Even I got the same error, I ...READ MORE

Apr 26, 2019 in Big Data Hadoop by disha
edited Apr 29, 2019 by Gitika • 1,637 views
0 votes
1 answer

Hadoop: Error: Hadoop Master cannot start the Slave with different user (or) Slave with different user failed to start by Hadoop Master node.

Hi, You can use these commands to get ...READ MORE

Aug 7, 2019 in Big Data Hadoop by Gitika
 • 65,890 points • 1,635 views
0 votes
1 answer

Unable to instantiate org.apache.hadoop.hive

You might not have set the connector. ...READ MORE

Jan 25, 2019 in Big Data Hadoop by Omkar
 • 69,230 points • 1,632 views
0 votes
1 answer

Hive: Configure Hue as a proxy user

On your node, go to the hadoop ...READ MORE

May 24, 2019 in Big Data Hadoop by Esha
 • 1,629 views
+1 vote
1 answer

2 datanodes is slower ,how to get those details .what is your approach as hadoop admin

First, enable the detection of slow nodes. ...READ MORE

Sep 23, 2019 in Big Data Hadoop by Riya
 • 1,627 views
+1 vote
1 answer

Hadoop Map Reduce: java.lang.reflect.InvocationTargetException

I executed the same code and it ...READ MORE

Dec 17, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 1,626 views
0 votes
1 answer

Ranger kms create key failed

Hi@shllpa, I have checked your file. All seems ...READ MORE

Oct 6, 2020 in Big Data Hadoop by MD
 • 95,460 points • 1,623 views
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