Trending questions in Apache Spark

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Working of map function on data

The map function creates an array of ...READ MORE

Jul 11, 2019 in Apache Spark by Krish
 • 2,084 views
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1 answer

How to calculate the result of formula with Scala?

Hi, You can use a simple mathematical calculation ...READ MORE

Jul 1, 2019 in Apache Spark by Gitika
 • 65,730 points • 2,458 views
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1 answer

Is fetching data from apache flume webcrawling?

Web crawling is a program or automated ...READ MORE

Jul 11, 2019 in Apache Spark by Esha
 • 2,005 views
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1 answer

Scala join comma delimited file as tables

Dataframe creation commands:​ Now we will register them ...READ MORE

Jul 9, 2019 in Apache Spark by Suraj
 • 2,002 views
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1 answer

Explain vararg arguments.

Hey, With varargs, we can pass a variable ...READ MORE

Jul 24, 2019 in Apache Spark by Gitika
 • 65,730 points • 1,351 views
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Is it mandatory to start Hadoop to run spark application?

Hi, No, not mandatory, but there is no ...READ MORE

Jul 5, 2019 in Apache Spark by Gitika
 • 65,730 points • 2,136 views
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1 answer

What is SparkCore functionalities?

Hey, Spark Core is a base engine of ...READ MORE

Jul 4, 2019 in Apache Spark by Gitika
 • 65,730 points • 2,078 views
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What is immutabiliity in Spark?

Can anyone explain what is immutability in ...READ MORE

Jul 23, 2019 in Apache Spark by Risha
 • 1,275 views
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1 answer

Error while reading multiline Json

peopleDF: org.apache.spark.sql.DataFrame = [_corrupt_record: string] The above that ...READ MORE

May 23, 2019 in Apache Spark by Conny
 • 3,865 views
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1 answer

When we create an RDD, does it bring the data and load it into the memory?

Hi, No. An RDD is made up of ...READ MORE

Jul 5, 2019 in Apache Spark by Gitika
 • 65,730 points • 2,006 views
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1 answer

How can you use "for" statement in scala to print list from collection?

Hi, You can use for loop in scala using ...READ MORE

Jul 5, 2019 in Apache Spark by Gitika
 • 65,730 points • 1,977 views
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When we create an RDD, does it bring the data and load it into the memory?

Can anyone suggest when we create an ...READ MORE

Jul 3, 2019 in Apache Spark by monalisa
recategorized Jul 4, 2019 by Gitika • 2,074 views
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1 answer

How can we optimize and minimize the memory when work with scala use case?

Hi, There is a term in Scala that is ...READ MORE

Jul 5, 2019 in Apache Spark by Gitika
 • 65,730 points • 1,904 views
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1 answer

What is persist() in Spark?

Hi, Spark’s RDDs are by default recomputed each ...READ MORE

Jul 2, 2019 in Apache Spark by Gitika
 • 65,730 points • 1,956 views
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what are the spark real time issues ?

Some of the issues I have faced ...READ MORE

Mar 18, 2019 in Apache Spark by Sharman
 • 6,541 views
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1 answer

How will you explain yield keyword in Scala?

Hi, Yield keyword can be used either before ...READ MORE

Jul 5, 2019 in Apache Spark by Gitika
 • 65,730 points • 1,811 views
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1 answer

How to assign block expression in scala?

Hi, You can follow this example to know ...READ MORE

Jul 5, 2019 in Apache Spark by Gitika
 • 65,730 points • 1,775 views
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1 answer

Spark: Saving file csv

 If you need a single output file ...READ MORE

May 22, 2019 in Apache Spark by Rishi
 • 3,676 views
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1 answer

Difference between RDD as val and var

Variable declaration can be done in two ...READ MORE

May 23, 2019 in Apache Spark by Arun
 • 3,586 views
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0 answers

How to create RDD as string file?

Can anyone suggest how to create RDD ...READ MORE

Jul 5, 2019 in Apache Spark by anand
 • 1,800 views
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1 answer

What is meant by Transformation? Give some examples.

Hi, The transformations are the functions that are ...READ MORE

Jul 3, 2019 in Apache Spark by Gitika
 • 65,730 points • 1,782 views
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1 answer

How to implement two level loop in scala?

Hi, You can use two level loops using the ...READ MORE

Jul 5, 2019 in Apache Spark by Gitika
 • 65,730 points • 1,643 views
0 votes
1 answer

How to print loop with condition in scala?

Hi, Yes, in scala there is a guard condition where ...READ MORE

Jul 6, 2019 in Apache Spark by Gitika
 • 65,730 points • 1,571 views
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1 answer

What does reduce action do in Spark?

Hey, Reduce action converts an RDD to a ...READ MORE

Jul 4, 2019 in Apache Spark by Gitika
 • 65,730 points • 1,605 views
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1 answer

By which components spark ecosystem libraries are composed of?

Hi, Spark ecosystem libraries are composed of various ...READ MORE

Jul 1, 2019 in Apache Spark by Gitika
 • 65,730 points • 1,693 views
0 votes
1 answer

How to store files in executor's working directory?

You have to specify a comma-separated list ...READ MORE

Mar 28, 2019 in Apache Spark by Raj
 • 5,687 views
0 votes
1 answer

Doubt in display(id, name, salary) before display function

The statement display(id, name, salary) is written before the display function ...READ MORE

Jun 19, 2019 in Apache Spark by Ritu
 • 1,723 views
0 votes
1 answer

Spark CLI issue

For spark.read.textFile we need spark-2.x. Please try ...READ MORE

Jun 19, 2019 in Apache Spark by Maahi
 • 1,669 views
0 votes
1 answer

How to change the location of Spark event logs?

You can change the location where you ...READ MORE

Mar 6, 2019 in Apache Spark by Rohit
 • 6,090 views
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1 answer

How to set extra JVM options for Spark application?

You cans set extra JVM options that ...READ MORE

Mar 28, 2019 in Apache Spark by Raj
 • 5,042 views
0 votes
1 answer

How to set cpu cores for spark task?

By default, each task is allocated with ...READ MORE

Mar 12, 2019 in Apache Spark by Veer
 • 5,569 views
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3 answers

Can anyone explain fold() operation in Spark?

Fold in spark Fold is a very powerful ...READ MORE

Aug 23, 2018 in Apache Spark by samarth295
 • 2,220 points • 14,676 views
0 votes
1 answer

Spark2-submit does not generate output file.

To generate the output file, you can ...READ MORE

Feb 24, 2019 in Apache Spark by Esha
 • 6,044 views
0 votes
1 answer

How to change commiter algorithm version in Spark?

To change to version 2, run the ...READ MORE

Mar 10, 2019 in Apache Spark by Siri
 • 5,372 views
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1 answer

Starting Spark in Windows

Run below commands spark-class org.apache.spark.deploy.master.Master spark-class org.apache.spark.deploy.worker.Worker spark://192.168.254.1:7077 NOTE: The ...READ MORE

May 22, 2019 in Apache Spark by Reshma
 • 2,063 views
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1 answer

How to get Spark SQL configuration?

First create a Spark session like this: val ...READ MORE

Mar 18, 2019 in Apache Spark by John
 • 4,858 views
0 votes
1 answer

SparkContext.addFile() not able to update file.

Spark by default won't let you overwrite ...READ MORE

Mar 10, 2019 in Apache Spark by Siri
 • 5,152 views
0 votes
1 answer

Increase Yarn wait time for Sparkcontext

The default time that the Yarn application waits ...READ MORE

Mar 27, 2019 in Apache Spark by Rohit
 • 4,411 views
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1 answer

What is Executor Memory in a Spark application?

Every spark application has same fixed heap ...READ MORE

Jan 5, 2019 in Apache Spark by Frankie
 • 9,830 points • 7,794 views
0 votes
1 answer

How to enable worker cleanup in Spark?

To enable cleanup, open the spark shell ...READ MORE

Mar 25, 2019 in Apache Spark by Hari
 • 4,258 views
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1 answer

Starting Spark Scala console

To get command prompt for Scala open ...READ MORE

May 24, 2019 in Apache Spark by Cassy
 • 1,624 views
0 votes
1 answer

Disable Web UI for Spark Application

You can disable it like this: val sc ...READ MORE

Mar 6, 2019 in Apache Spark by Rohit
 • 4,981 views
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3 answers

Lineage Graph in Spark

Whenever a series of transformations are performed ...READ MORE

Aug 28, 2018 in Apache Spark by shams
 • 3,670 points • 14,645 views
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2 answers

In a Spark DataFrame how can I flatten the struct?

// Collect data from input avro file ...READ MORE

Jul 4, 2019 in Apache Spark by Dhara dhruve
 • 8,200 views
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1 answer

What is Spark Core?

It is not like a CPU to ...READ MORE

Mar 8, 2019 in Apache Spark by Raj
 • 4,529 views
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1 answer

Spark Yarn: Changing maximum number of time to submit application

By default, the maximum number of times ...READ MORE

Mar 28, 2019 in Apache Spark by Raj
 • 3,591 views
0 votes
1 answer

How to enable Spark event logging?

To make Spark store the event logs, ...READ MORE

Mar 6, 2019 in Apache Spark by Rohit
 • 4,339 views
0 votes
1 answer

How to enable SSL for Spark application?

You can do it dynamically like this: val ...READ MORE

Mar 15, 2019 in Apache Spark by Karan
 • 3,877 views
0 votes
1 answer

How do spark extra listeners work?

Yes. You can use extra listeners by setting ...READ MORE

Feb 24, 2019 in Apache Spark by Rishi
 • 4,640 views
0 votes
1 answer

what are the job optimization Technics in spark and scala ?

There are different methods to achieve optimization ...READ MORE

Mar 18, 2019 in Apache Spark by Veer
 • 3,625 views
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