Trending questions in Big Data Hadoop

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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
 • 65,730 points • 958 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 • 1,522 views
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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
 • 829 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
 • 65,730 points • 1,779 views
0 votes
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
 • 1,765 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
 • 65,730 points • 855 views
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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
 • 2,043 views
0 votes
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
 • 1,504 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
 • 1,309 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
 • 65,730 points • 1,606 views
0 votes
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
 • 1,169 views
0 votes
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
 • 1,039 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
 • 1,129 views
0 votes
1 answer

Hive partitioning: Dynamic and static

Partitions are created depending on the end ...READ MORE

Feb 1, 2019 in Big Data Hadoop by Omkar
 • 69,180 points • 6,469 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
 • 1,160 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
 • 1,361 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
 • 1,103 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 • 1,976 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
 • 1,709 views
0 votes
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
 • 1,144 views
0 votes
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
 • 65,730 points • 783 views
0 votes
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
 • 65,730 points • 780 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
 • 65,730 points • 1,415 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
 • 996 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
 • 1,289 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
 • 1,588 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
 • 1,659 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
 • 65,730 points • 1,307 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
 • 1,089 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
 • 1,579 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
 • 1,616 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
 • 1,011 views
0 votes
1 answer

HiveServer2 connection URL format

The HiveServer2 connection URL has the following ...READ MORE

Jun 4, 2019 in Big Data Hadoop by Giri
 • 1,002 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
 • 69,180 points • 8,724 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
 • 65,730 points • 1,816 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
 • 1,325 views
0 votes
1 answer

What is group_name_filter property in Hue file?

The group_name_attr is used to set the username in the ...READ MORE

May 28, 2019 in Big Data Hadoop by Vasu
 • 1,286 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
 • 65,730 points • 1,532 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
 • 970 views
0 votes
1 answer

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 • 1,224 views
0 votes
1 answer

How can I change data in HDFS?

You can not modified data once stored ...READ MORE

Feb 19, 2019 in Big Data Hadoop by Rishi
 • 5,530 views
0 votes
1 answer

Hadoop: java.lang.IllegalArgumentException: Wrong FS: expected: file:///

Try this: Configuration configuration = new Configuration(); FileSystem fs ...READ MORE

Dec 12, 2018 in Big Data Hadoop by Omkar
 • 69,180 points • 8,465 views
0 votes
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 • 1,207 views
0 votes
1 answer

Installing WebHCat on a SLES OS

apt-get is used for Ubuntu or other debian ...READ MORE

Jun 3, 2019 in Big Data Hadoop by Emily
 • 991 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
 • 65,730 points • 2,020 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
 • 65,730 points
edited May 8, 2019 by Gitika • 2,148 views
0 votes
1 answer

what is the difference between drop and drop_all command in Hbase?

Hey, drop:- This command is used to drop ...READ MORE

May 24, 2019 in Big Data Hadoop by Gitika
 • 65,730 points • 1,414 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
 • 1,192 views
0 votes
1 answer

How many files can hive create in HDFS duringbMapReduce job?

There is a limit on how many ...READ MORE

May 21, 2019 in Big Data Hadoop by Charuni
 • 1,539 views
0 votes
1 answer

How to enable LDAP authenticaition in Hue?

You can enable LDAP authentication with HiveServer2 by ...READ MORE

Jun 3, 2019 in Big Data Hadoop by Bhavan
 • 972 views
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