Most voted questions in Apache Spark

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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
 • 65,910 points • 752 views
0 votes
1 answer

What is Lazy evaluated in Spark?

Hi, If you execute a bunch of programs, ...READ MORE

Jul 5, 2019 in Apache Spark by Gitika
 • 65,910 points • 1,109 views
0 votes
1 answer

Which File System is supported by Apache Spark?

Hi, Apache Spark is an advanced data processing ...READ MORE

Jul 5, 2019 in Apache Spark by Gitika
 • 65,910 points • 5,770 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
 • 65,910 points • 585 views
0 votes
1 answer

Do real-time data processing is possible with Spark SQL?

Hey, Real-time data processing is not possible directly ...READ MORE

Jul 5, 2019 in Apache Spark by Gitika
 • 65,910 points • 1,215 views
0 votes
1 answer

What is Spark Driver?

Hi, Spark Driver is the program that runs ...READ MORE

Jul 5, 2019 in Apache Spark by Gitika
 • 65,910 points • 2,278 views
0 votes
1 answer

How to run spark in Standalone client mode?

Hi, These are the steps to run spark in ...READ MORE

Jul 5, 2019 in Apache Spark by Gitika
 • 65,910 points • 1,478 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
 • 664 views
0 votes
1 answer

error: reassingment to val

Hi, This error will only generate when you ...READ MORE

Jul 5, 2019 in Apache Spark by Gitika
 • 65,910 points • 2,922 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
 • 65,910 points • 465 views
0 votes
1 answer

What is RDD Lineage in Spark?

Hey, Lineage is an RDD process to reconstruct ...READ MORE

Jul 4, 2019 in Apache Spark by Gitika
 • 65,910 points • 4,057 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
 • 65,910 points • 715 views
0 votes
1 answer

error: identified expected but integer literal found.

Hi, You can resolve this error with a ...READ MORE

Jul 4, 2019 in Apache Spark by Gitika
 • 65,910 points • 5,561 views
0 votes
1 answer

How to create RDD from an external file source in scala?

Hi, To create an RDD from external file ...READ MORE

Jul 4, 2019 in Apache Spark by Gitika
 • 65,910 points • 1,542 views
0 votes
1 answer

How to create RDD from existing RDD in scala?

scala> val rdd1 = sc.parallelize(List(1,2,3,4,5))                           -  Creating ...READ MORE

Feb 29, 2020 in Apache Spark by anonymous
 • 1,216 views
0 votes
1 answer

How to create RDD from parallelized collection in scala?

Hi, You can check this example in your ...READ MORE

Jul 4, 2019 in Apache Spark by Gitika
 • 65,910 points • 1,339 views
0 votes
1 answer

error: identifier expected but ']' found.

Hi, You can try this remove brackets from ...READ MORE

Jul 3, 2019 in Apache Spark by Gitika
 • 65,910 points • 5,091 views
0 votes
1 answer

What is Action in Spark?

Hi, Actions are RDD’s operation, that value returns ...READ MORE

Jul 3, 2019 in Apache Spark by Gitika
 • 65,910 points • 11,316 views
0 votes
1 answer

What is Map and flatMap in Spark?

Hi, The map is a specific line or ...READ MORE

Jul 3, 2019 in Apache Spark by Gitika
 • 65,910 points • 1,885 views
0 votes
1 answer

Why Partitions are immutable in Spark?

Hi, Every transformation generates a new partition. Partitions ...READ MORE

Jul 3, 2019 in Apache Spark by Gitika
 • 65,910 points • 1,555 views
0 votes
1 answer

How SparkSQL is different from HQL and SQL?

Hi, SparkSQL is a special component on the ...READ MORE

Jul 3, 2019 in Apache Spark by Gitika
 • 65,910 points • 3,453 views
0 votes
1 answer

What is Piping in Spark?

Hi, Spark provides a pipe() method on RDDs. ...READ MORE

Jul 3, 2019 in Apache Spark by Gitika
 • 65,910 points • 2,708 views
0 votes
1 answer

What is the difference between persist() and cache() in apache spark?

Hi, persist () allows the user to specify ...READ MORE

Jul 3, 2019 in Apache Spark by Gitika
 • 65,910 points • 3,336 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
 • 65,910 points • 557 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 • 1,109 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
 • 65,910 points • 574 views
0 votes
1 answer

What is a Parquet file in Spark?

Hey, Parquet is a columnar format file supported ...READ MORE

Jul 2, 2019 in Apache Spark by Gitika
 • 65,910 points • 1,090 views
0 votes
2 answers

How to execute a function in apache-scala?

Function Definition : def test():Unit{ var a=10 var b=20 var c=a+b } calling ...READ MORE

Aug 5, 2020 in Apache Spark by Ramkumar Ramasamy
 • 682 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
 • 65,910 points • 1,013 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
 • 65,910 points • 498 views
0 votes
1 answer

What is polyglot in spark?

Hi, Spark provides a high-level API in Java, ...READ MORE

Jul 1, 2019 in Apache Spark by Gitika
 • 65,910 points • 2,097 views
0 votes
1 answer

What is RDD in Apache spark?

Hi, RDD in spark stands for REsilient distributed ...READ MORE

Jul 1, 2019 in Apache Spark by Gitika
 • 65,910 points • 1,170 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
 • 404 views
0 votes
1 answer

Scala pass input data as arguments

Please refer to the below code as ...READ MORE

Jun 19, 2019 in Apache Spark by Lisa
 • 2,131 views
0 votes
1 answer

Scala: Add user input to array

You can try this:  object printarray { ...READ MORE

Jun 19, 2019 in Apache Spark by Dinesha
 • 4,276 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
 • 517 views
0 votes
1 answer

Spark foldbykey doubt

Please have a look below for your ...READ MORE

Jun 19, 2019 in Apache Spark by Tina
 • 2,248 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
 • 563 views
0 votes
1 answer

Spark Error: java.lang.IllegalStateException: Cannot call methods on a stopped SparkContext.

There seems to be a problem with ...READ MORE

May 24, 2019 in Apache Spark by Jishan
 • 10,320 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
 • 2,220 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
 • 2,633 views
0 votes
1 answer

Copy all files from local (Windows) to HDFS with Scala code

Please try the following Scala code: import org.apache.hadoop.conf.Configuration import ...READ MORE

May 22, 2019 in Apache Spark by Karan
 • 3,755 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
 • 807 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
 • 2,408 views
0 votes
0 answers

WARN NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable [closed]

Hi All I am running Scala program on ...READ MORE

May 5, 2019 in Apache Spark by Vishal
closed May 6, 2019 by Omkar • 5,279 views
0 votes
1 answer

How to find the number of null contain in dataframe?

Hey there! You can use the select method of the ...READ MORE

May 3, 2019 in Apache Spark by Omkar
 • 69,210 points • 4,668 views
0 votes
1 answer

How can we use spark shell for scala without cluster?

You can run the Spark shell for ...READ MORE

Apr 28, 2019 in Apache Spark by Giri
 • 502 views
0 votes
1 answer

Spark comparing two big data files using scala

Try this and see if this does ...READ MORE

Apr 2, 2019 in Apache Spark by Omkar
 • 69,210 points • 6,662 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
 • 1,678 views
0 votes
1 answer

Set Library to launch Yarn master

You can make use of Special Library path to ...READ MORE

Mar 28, 2019 in Apache Spark by Raj
 • 438 views
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