Most answered questions in Big Data Hadoop

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Command to get status of all running Oozie workflow

Hey, You can use this command to get ...READ MORE

Jun 12, 2019 in Big Data Hadoop by Gitika
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5,593 views
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How Oozie prepares Hadoop configuration file?

Hi, Oozie prepares a Hadoop configuration file which ...READ MORE

Jun 12, 2019 in Big Data Hadoop by Gitika
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1,138 views
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How kill control node works in Oozie?

Hey, The kill node allows a workflow job to kill ...READ MORE

Jun 12, 2019 in Big Data Hadoop by Gitika
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1,559 views
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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
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659 views
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How Oozie workflow can be parameterised?

Hi, Oozie workflows can be parameterized. The parameters ...READ MORE

Jun 12, 2019 in Big Data Hadoop by Gitika
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1,501 views
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What is fork Keyword in Oozie? How Fork and Join keyword are related t o each other in Oozie?

Hey, Basically, when we want to run multiple jobs ...READ MORE

Jun 12, 2019 in Big Data Hadoop by Gitika
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3,042 views
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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
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612 views
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Use cases of Apache Oozie?

Hi, Apache Oozie is used by Hadoop system ...READ MORE

Jun 12, 2019 in Big Data Hadoop by Gitika
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1,040 views
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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
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590 views
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What is control flow Nodes defines in Oozie?

Hello, Control flow nodes define the beginning and ...READ MORE

Jun 10, 2019 in Big Data Hadoop by Gitika
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1,094 views
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Mention what is the Hadoop MapReduce APIs contract for a key and value class?

Hey, For a key and value class, there ...READ MORE

Jun 10, 2019 in Big Data Hadoop by Gitika
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912 views
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1 answer

How to ensure that Oozie has started? Which Command line tool use to check the status of Oozie?

Hey, To get ensure that your Oozie has ...READ MORE

Jun 10, 2019 in Big Data Hadoop by Gitika
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1,811 views
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How to create the Oozie DB using the 'ooziedb.sh' command line tool?

This is the command you can use: $ ...READ MORE

Jun 10, 2019 in Big Data Hadoop by Gitika
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1,174 views
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How to configure the Hadoop cluster with proxyuser for the Oozie process?

Hey, The following two properties are required in ...READ MORE

Jun 10, 2019 in Big Data Hadoop by Gitika
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1,049 views
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Mention how many InputSplits is made by a Hadoop Framework?

Hey, Hadoop will make 5 splits 1 split for ...READ MORE

Jun 10, 2019 in Big Data Hadoop by Gitika
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843 views
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1 answer

Explain what is WebDAV in Hadoop?

Hey, To support editing and updating files WebDAV ...READ MORE

Jun 10, 2019 in Big Data Hadoop by Gitika
• 65,770 points
1,042 views
0 votes
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
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723 views
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Mention what are the main configuration parameters that user need to specify to run MapReduce Job?

Hi, The user of the MapReduce framework needs ...READ MORE

Jun 10, 2019 in Big Data Hadoop by Gitika
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2,525 views
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Explain what is a sequence file in Hadoop?

Hello, To store binary key/value pairs, sequence file ...READ MORE

Jun 10, 2019 in Big Data Hadoop by Gitika
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1,068 views
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Explain to me the correct way to get a Hadoop FileSystem object so that I can use it for reading from HDFS as well as writing to HDFS.

FileSystem needs only one configuration key to successfully ...READ MORE

Jun 7, 2019 in Big Data Hadoop by ravikiran
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2,648 views
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1 answer
0 votes
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Factorial function in Impala

There are two ways to do this: select ...READ MORE

Jun 7, 2019 in Big Data Hadoop by Reshma
578 views
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1 answer

How to subtract month from Impala time stamp?

You don't need another method, you can ...READ MORE

Jun 6, 2019 in Big Data Hadoop by Tina
3,686 views
0 votes
1 answer

Impala: Add months to current time

You can add the months using the add_months method ...READ MORE

Jun 6, 2019 in Big Data Hadoop by John
2,100 views
0 votes
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Impala get current time

You can get the current time using ...READ MORE

Jun 6, 2019 in Big Data Hadoop by Raman
1,598 views
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Power of a number in Impala

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

Jun 6, 2019 in Big Data Hadoop by Reshma
857 views
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Impala concatenate string.

Yes, you can concatenate two strings using ...READ MORE

Jun 6, 2019 in Big Data Hadoop by Raghu
14,144 views
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Sqoop and Teradata database connection URL

Refer below Syntax: jdbc:teradata://<HOST>/DBS_PORT=1025/DA ...READ MORE

Jun 6, 2019 in Big Data Hadoop by Vishwa
1,263 views
0 votes
1 answer

What is the PostgreSQL connection string for Sqoop?

The format of the connection string is: jdbc:postgresql://<HOST>:<PORT>/<DATABASE_NAME> You ...READ MORE

Jun 6, 2019 in Big Data Hadoop by Kamal
2,079 views
0 votes
1 answer

Connection String for MySQL database using Sqoop

The format for the connection string and ...READ MORE

Jun 6, 2019 in Big Data Hadoop by John
2,118 views
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1 answer

Sqoop: Oracle Connection String

The format for connection string for Oracle ...READ MORE

Jun 6, 2019 in Big Data Hadoop by Varun
2,309 views
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Install PostgreSQL JDBC driver for Sqoop

All you have to do to install ...READ MORE

Jun 6, 2019 in Big Data Hadoop by Quill
3,277 views
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Using Microsoft SQL Server for Sqoop

To use Microsoft SQL Server for Sqoop, ...READ MORE

Jun 6, 2019 in Big Data Hadoop by Ramay
1,076 views
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Run Oozie against a federated Cluster

You can run Oozie against the federated ...READ MORE

Jun 6, 2019 in Big Data Hadoop by Nanda
564 views
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Oozie Uber JARs support configuration

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

Jun 6, 2019 in Big Data Hadoop by Karan
762 views
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How to configure Oozie to use Oracle?

You have to mention the following properties ...READ MORE

Jun 6, 2019 in Big Data Hadoop by Rishi
973 views
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1 answer

Is there a possibility to run Apache Spark without Hadoop?

Spark and Hadoop both are the open-source ...READ MORE

Jun 6, 2019 in Big Data Hadoop by ravikiran
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1,471 views
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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
1,023 views
0 votes
1 answer

Configure Oozie to use MySQL

To configure Oozie to use MySQL, open ...READ MORE

Jun 4, 2019 in Big Data Hadoop by Karan
1,477 views
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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
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Configure Oozie to use PostgreSQL

To configure Oozie to use PostgreSQL, add ...READ MORE

Jun 4, 2019 in Big Data Hadoop by Rajan
1,148 views
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Remove attribute from a column in HBase

To remove the attribute from a column, ...READ MORE

Jun 4, 2019 in Big Data Hadoop by Firoz
1,088 views
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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
915 views
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1 answer

Hive queries from mapreduce gives Null Pointer Exception.

I think you have upgraded CDH. This ...READ MORE

Jun 4, 2019 in Big Data Hadoop by Rihan
2,606 views
0 votes
1 answer

Error: org.apache.thrift.transport.TTransportException (state=08S01,code=0)

This error usually occurs when the HiveServer2 ...READ MORE

Jun 4, 2019 in Big Data Hadoop by Ram
12,286 views
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1 answer

Hive Execution Engine

The default execution engine for Hive is mr. To ...READ MORE

Jun 4, 2019 in Big Data Hadoop by Varun
2,343 views
0 votes
1 answer

JDBC to HiveServer2 connection in HTTPS mode with SSL enabled

To connect to HiveServer2 in HTTPS mode ...READ MORE

Jun 4, 2019 in Big Data Hadoop by Firoz
2,223 views
0 votes
1 answer

Connecting to HiveServer2 with SSL enabled.

The connection URL format to connect to ...READ MORE

Jun 4, 2019 in Big Data Hadoop by Dinesh
668 views
0 votes
1 answer

How to connect to HiveServer2 in HTTPS mode?

The connection URL to connect to HiveServer2 ...READ MORE

Jun 4, 2019 in Big Data Hadoop by Rachit
1,336 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
886 views