Trending questions in Big Data Hadoop

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How do I run Hadoop with Docker for both DEV and PROD environments?

Your requirements show that you are using ...READ MORE

May 30, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 1,173 views
0 votes
1 answer

Can some one help me resolve this warning? It says "Unable to load Native-Hadoop library to your platform"

I understood the issue. I have faced ...READ MORE

Jun 6, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 878 views
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1 answer

What is work flow application consists of in Oozie?

Hi, A workflow application consists of the workflow ...READ MORE

Jun 12, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 614 views
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1 answer

How will you backup an HBase cluster?

Hey, In 2 ways we can perform HBase ...READ MORE

May 22, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 1,516 views
0 votes
1 answer

How to import selected columns in Sqoop?

If you want to import selected columns, ...READ MORE

May 15, 2019 in Big Data Hadoop by Shirish
 • 1,803 views
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0 answers

Command to initiate MapReduce which provide decent UI?

I am new to MapReduce and want ...READ MORE

Jun 14, 2019 in Big Data Hadoop by Rachna
 • 546 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 • 1,783 views
0 votes
1 answer

Hive, Sentry: Problem while granting roles to a group

The group name you are trying to ...READ MORE

May 31, 2019 in Big Data Hadoop by Jimmy
 • 1,097 views
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1 answer

Explain what does the conf.setMapper Class do?

Hi, Conf.setMapperclass  sets the mapper class and all ...READ MORE

Jun 10, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 655 views
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1 answer

Can anyone help me with the installation and configuration procedures of Hadoop Multi-Node Cluster?

If you are ready to switch to ...READ MORE

May 28, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 1,218 views
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1 answer

How to set Sqoop server in Hue?

I am not exactly sure what you ...READ MORE

May 27, 2019 in Big Data Hadoop by Karna
 • 1,258 views
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1 answer

Power of a number in Impala

Suppose you have fetched two values X ...READ MORE

Jun 6, 2019 in Big Data Hadoop by Reshma
 • 814 views
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1 answer

Query regarding Temporary table's metadata in HIVE

Registered tables are not cached in memory. ...READ MORE

May 22, 2019 in Big Data Hadoop by Tina
 • 1,447 views
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1 answer

Disable Client/Server authentication in Hue

To disable the Client/Server authentication, you have ...READ MORE

Jun 3, 2019 in Big Data Hadoop by Preetham
 • 929 views
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1 answer

How to set LDAP authentication for HiveServer2 for unmanaged clusters?

To enable LDAP authentication for HiveServer2 unmanaged ...READ MORE

Jun 3, 2019 in Big Data Hadoop by Sanman
 • 926 views
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1 answer

What is the necessity of slave node in Oozie workflow?

Hey, A topology runs in a distributed manner, ...READ MORE

Jun 12, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 566 views
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1 answer

What start node does in Oozie?

Hey, The start node is the entry point for a ...READ MORE

Jun 11, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 562 views
0 votes
1 answer

Can I use pattern matching in Hive?

Yes, it is possible to use pattern ...READ MORE

May 21, 2019 in Big Data Hadoop by Khan
 • 1,469 views
+1 vote
1 answer

Hadoop: "DEPRECATED: Use of this script to execute hdfs command is deprecated." error

The use of dfs in your command is "Deprecated". ...READ MORE

Nov 26, 2018 in Big Data Hadoop by Omkar
 • 69,220 points • 9,023 views
0 votes
1 answer

What is the difference between the disable and disable-all keyword in HBase?

Hey, disable:- This command will start disabling the ...READ MORE

May 24, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 1,322 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 • 1,718 views
0 votes
1 answer

How to set proxy server api in Hue?

Follows these steps: Open the hue configuration file Search for the [[yarn_clusters]] section Set ...READ MORE

May 30, 2019 in Big Data Hadoop by Reshma
 • 1,098 views
0 votes
1 answer

Using hedged reads in HBase

To enable hedged reads, open the hbase-site.xml file and ...READ MORE

Jun 4, 2019 in Big Data Hadoop by Gani
 • 838 views
0 votes
1 answer

Hive: Execute MapReduce jobs locally

You can set Hive to run MapReduce ...READ MORE

May 21, 2019 in Big Data Hadoop by Gani
 • 1,428 views
0 votes
1 answer

Whenever I try to start the yarn daemon. ./start-dfs.sh it says access denied I have even tried changing the file permissions but it didn't work.

Seems like the ssh is not properly ...READ MORE

Mar 8, 2019 in Big Data Hadoop by Omkar
 • 69,220 points • 4,631 views
0 votes
1 answer

How to install Zookeeper in Ubuntu?

There are two ways to install Zookeeper: You ...READ MORE

Feb 20, 2019 in Big Data Hadoop by Omkar
 • 69,220 points • 5,319 views
0 votes
1 answer

How to load encrypted tables to encrypted table in Hive?

If the data is already encrypted, use ...READ MORE

May 30, 2019 in Big Data Hadoop by Esha
 • 1,027 views
0 votes
1 answer

Enable pluggable authentication for HiveServer2

To enable pluggable authentication, first, add the ...READ MORE

Jun 3, 2019 in Big Data Hadoop by Yogi
 • 857 views
0 votes
1 answer

How to kill a Backup Master in HBase?

Hey, To kill a backup master, you need ...READ MORE

May 23, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 1,314 views
0 votes
1 answer

HiveServer2 connection URL for remote mode

For a remote server, the URL format ...READ MORE

Jun 4, 2019 in Big Data Hadoop by Mahesh
 • 782 views
0 votes
1 answer

Unable to run Name node and datanode on Single Node cluster: Does not contain a valid host:port

Add the following properties in the core-site.xml file, it ...READ MORE

May 22, 2019 in Big Data Hadoop by Sanam
 • 1,331 views
0 votes
1 answer

How to configure ulimit for Hbase using command line?

Hi, Increasing the file handles for the user ...READ MORE

May 29, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 1,030 views
0 votes
1 answer

Which code do we use to open the connection in HBase?

Hey, To open a connection, following code: Configuartion myconf ...READ MORE

May 23, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 1,307 views
0 votes
1 answer

Configurations to enable impersonation for Hbase thrift servers

The default configuration suggested in the official ...READ MORE

May 27, 2019 in Big Data Hadoop by Khan
 • 1,093 views
0 votes
1 answer

How to install HBase on Linux?

To install Hbase, you first need the ...READ MORE

Feb 27, 2019 in Big Data Hadoop by Tanisha
 • 4,933 views
0 votes
1 answer

How to create an Ephemeral Znode in zookeeper?

Hey, To create an Ephemeral Znode, add -e flag as shown ...READ MORE

May 28, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 1,082 views
0 votes
2 answers

Using PHP to get all file names in a folder stored in HDFS

So i found a workaround for the ...READ MORE

Mar 13, 2019 in Big Data Hadoop by Bhavish
 • 370 points
edited Mar 13, 2019 by Omkar • 4,391 views
0 votes
1 answer

How to change WebHCat default port?

The default port configuration is stored in ...READ MORE

Jun 4, 2019 in Big Data Hadoop by Hari
 • 750 views
0 votes
1 answer

Configure Oozie to use MariaDB

Add the following properties in the oozie-site.xml file, it ...READ MORE

Jun 4, 2019 in Big Data Hadoop by Esha
 • 738 views
0 votes
1 answer

Oozie Uber JARs support configuration

You can configure Oozie to handle Uber ...READ MORE

Jun 6, 2019 in Big Data Hadoop by Karan
 • 657 views
0 votes
1 answer

How to set maximum dynamic partitions in MapReduce mode?

There is a default maximum number of ...READ MORE

May 21, 2019 in Big Data Hadoop by Likith
 • 1,329 views
0 votes
1 answer

Hive: Display column to which there is SELECT access

You can use the following query to ...READ MORE

Jun 3, 2019 in Big Data Hadoop by Pratham
 • 764 views
0 votes
1 answer

Issues using sqoop command while listing database

Please use the following command. sqoop list-databases --connect ...READ MORE

May 23, 2019 in Big Data Hadoop by Raj
 • 1,235 views
0 votes
1 answer

How to set job tracker host in Hue?

You have to set this in the hue ...READ MORE

May 30, 2019 in Big Data Hadoop by Raman
 • 965 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
 • 65,770 points • 1,784 views
+1 vote
1 answer

How to write file in hdfs using python?

#!/usr/bin/python from subprocess import Popen, PIPE cat = Popen(["hadoop", ...READ MORE

Dec 6, 2018 in Big Data Hadoop by Omkar
 • 69,220 points • 8,430 views
0 votes
1 answer

High Availability Yarn configuration in Hue

Here's the default configuration suggested by the ...READ MORE

May 30, 2019 in Big Data Hadoop by Rajan
 • 912 views
0 votes
1 answer

What is the syntax for creating bucketing table in hive?

Hi, Syntax for creating bucketed table is as ...READ MORE

May 16, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 1,527 views
0 votes
1 answer

Installing WebHCat on Ubuntu

To install WebHCat on ubuntu using apt-get, ...READ MORE

Jun 3, 2019 in Big Data Hadoop by Richard
 • 733 views
0 votes
1 answer

How to set Zookeeper server in Hue?

You have to set the details of ...READ MORE

May 30, 2019 in Big Data Hadoop by John
 • 895 views
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