Trending questions in Apache Spark

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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
 • 1,746 views
0 votes
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 • 2,145 views
0 votes
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 • 1,142 views
0 votes
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
 • 1,758 views
0 votes
1 answer

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 • 1,871 views
0 votes
0 answers

What is immutabiliity in Spark?

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

Jul 23, 2019 in Apache Spark by Risha
 • 1,105 views
+1 vote
1 answer

map vs mapValues in Spark

There is a difference between the two: mapValues ...READ MORE

Jun 29, 2018 in Apache Spark by nitinrawat895
 • 11,380 points • 17,834 views
0 votes
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 • 1,869 views
0 votes
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
 • 3,619 views
0 votes
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 • 1,771 views
0 votes
0 answers

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 • 1,863 views
0 votes
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 • 1,673 views
0 votes
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 • 1,656 views
0 votes
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 • 1,580 views
0 votes
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 • 1,548 views
0 votes
1 answer

what are the spark real time issues ?

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

Mar 18, 2019 in Apache Spark by Sharman
 • 6,275 views
0 votes
1 answer

Spark: Saving file csv

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

May 22, 2019 in Apache Spark by Rishi
 • 3,445 views
0 votes
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
 • 1,621 views
0 votes
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 • 1,631 views
0 votes
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
 • 3,338 views
0 votes
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 • 1,550 views
0 votes
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 • 1,428 views
0 votes
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 • 1,401 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 • 1,278 views
0 votes
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 • 1,420 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
 • 5,382 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
 • 1,484 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
 • 1,427 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
 • 5,788 views
0 votes
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
 • 4,793 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
 • 5,277 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
 • 5,803 views
0 votes
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 • 14,164 views
0 votes
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
 • 1,801 views
0 votes
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
 • 4,600 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
 • 4,964 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
 • 4,127 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
 • 4,743 views
0 votes
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 • 7,503 views
0 votes
1 answer

Starting Spark Scala console

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

May 24, 2019 in Apache Spark by Cassy
 • 1,385 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
 • 3,931 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
 • 4,707 views
0 votes
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 • 14,034 views
0 votes
1 answer

What is Spark Core?

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

Mar 8, 2019 in Apache Spark by Raj
 • 4,291 views
0 votes
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
 • 7,694 views
0 votes
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
 • 3,188 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
 • 4,000 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
 • 3,607 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
 • 4,329 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
 • 3,341 views
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