Most answered questions in Apache Spark

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Spark Error: StackOverflowError : Exception in thread "main" java.lang.StackOverflowError at org.apache.spark.rdd.UnionRDD$$anonfun$1.apply

Hey, It already has SparkContent.union and it does know how to ...READ MORE

Jul 31, 2019 in Apache Spark by Gitika
 • 65,910 points • 4,119 views
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Spark:error:throws stack overflow when union a lot.

Hey, Use SparkContext.union(...) instead to union many RDDs at once You ...READ MORE

Jul 31, 2019 in Apache Spark by Gitika
 • 65,910 points • 4,477 views
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What is 'TRAITS' in Scala

Hi, Traits are basically Scala's workaround for the ...READ MORE

Jul 31, 2019 in Apache Spark by Gitika
 • 65,910 points • 593 views
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1 answer

Scala: Loading a csv file

Refer to the below command: val input_df = ...READ MORE

Jul 31, 2019 in Apache Spark by Emma
 • 852 views
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1 answer

What is the use of App class in Scala?

Hi, Scala provides a helper class, called App, that ...READ MORE

Jul 31, 2019 in Apache Spark by Gitika
 • 65,910 points • 10,768 views
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What are these in scala : _* & @_*

As is widely used, and has different ...READ MORE

Jul 31, 2019 in Apache Spark by Turic
 • 2,308 views
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How to create singleton classes in Scala?

Hey, Scala introduces a new object keyword, which is used ...READ MORE

Jul 31, 2019 in Apache Spark by Gitika
 • 65,910 points • 1,569 views
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1 answer

Cannot load file to spark: "org.apache.spark.sql.AnalysisException: Path does not exist"

Since the file is in HDFS so ...READ MORE

Jul 31, 2019 in Apache Spark by Tina
 • 10,913 views
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1 answer

Removing the header of a text file in SparkRDD

1) First we loaded the data to ...READ MORE

Jul 31, 2019 in Apache Spark by Namitha
 • 6,190 views
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1 answer

How to format a string in Scala?

Hey, To format a string, use the .format ...READ MORE

Jul 31, 2019 in Apache Spark by Gitika
 • 65,910 points • 576 views
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1 answer

How 'Scala Higher Order function' works in Scala?

Hey, Scala allows the definition of a higher-order function. These ...READ MORE

Jul 31, 2019 in Apache Spark by Gitika
 • 65,910 points • 572 views
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1 answer

How to work with multidimensional arrays in Scala?

Hi, Here is an example you can follow: scala> ...READ MORE

Jul 31, 2019 in Apache Spark by Gitika
 • 65,910 points • 688 views
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1 answer

How to concatenate sets in Scala?

Hey, Yes, there are two ways of doing ...READ MORE

Jul 31, 2019 in Apache Spark by Gitika
 • 65,910 points • 1,285 views
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1 answer

How to find values common to two sets in Scala

Hey, There are two ways to find the ...READ MORE

Jul 31, 2019 in Apache Spark by Gitika
 • 65,910 points • 1,403 views
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How do find Max and Min values in a set in Scala?

Hey, Here is the example of which will return ...READ MORE

Jul 30, 2019 in Apache Spark by Gitika
 • 65,910 points • 3,889 views
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1 answer

How to declare sets with value in Scala?

Hey, You can follow this code: scala> var s=Set(1,4,4,3) s: ...READ MORE

Jul 30, 2019 in Apache Spark by Gitika
 • 65,910 points • 383 views
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1 answer

PySpark not starting: No active sparkcontext

Seems like Spark hadoop daemons are not ...READ MORE

Jul 30, 2019 in Apache Spark by Jishan
 • 4,114 views
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1 answer

Unable to use ml library in pyspark

The error message you have shared with ...READ MORE

Jul 30, 2019 in Apache Spark by Karan
 • 2,486 views
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1 answer

Scala: org.apache.poi.openxml4j.exceptions.InvalidFormatException: Your InputStream was neither an OLE2 stream, nor an OOXML stream

Try executing the below code, def readExcel(file: String): ...READ MORE

Jul 30, 2019 in Apache Spark by Raman
 • 1,461 views
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1 answer

Unable to run the java- spark standalone program

Though there is nothing wrong with the ...READ MORE

Jul 30, 2019 in Apache Spark by Lohit
 • 1,112 views
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1 answer

Date formats : how to cast string to date?

Try this, it should work: > from pyspark.sql.functions ...READ MORE

Jul 29, 2019 in Apache Spark by Niall
 • 5,718 views
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1 answer

How to fit multiple assignment statements into one statement in Scala?

Hi, You can assign a Tuple to a ...READ MORE

Jul 29, 2019 in Apache Spark by Gitika
 • 65,910 points • 663 views
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1 answer

How to search for a Key in a Scala Map?

Hey, The Map.contains() method will tell you if ...READ MORE

Jul 29, 2019 in Apache Spark by Gitika
 • 65,910 points • 844 views
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1 answer

How to concatenate Maps in Scala?

Hey, You can concatenate/join two Maps in more than ...READ MORE

Jul 29, 2019 in Apache Spark by Gitika
 • 65,910 points
edited Jul 29, 2019 by Gitika • 2,472 views
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1 answer

How to declare a Empty Scala Map?

Hi, You can either declare an empty Scala ...READ MORE

Jul 29, 2019 in Apache Spark by Gitika
 • 65,910 points
edited Jul 29, 2019 by Gitika • 1,848 views
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1 answer

"main" java.lang.NoClassDefFoundError: org/apache/hadoop/fs/FSDataInputStream

1. We will check whether master and ...READ MORE

Jul 29, 2019 in Apache Spark by Yogi
 • 5,876 views
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1 answer

How the if-else statement is different for Scala and Java?

Hey, There is one main difference. This statement ...READ MORE

Jul 29, 2019 in Apache Spark by Gitika
 • 65,910 points • 858 views
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1 answer

What is the differentiate between equals() and == in Scala. Is the latter the same as == in Java?

Hey, When we try to compare two instances ...READ MORE

Jul 29, 2019 in Apache Spark by Gitika
 • 65,910 points • 1,055 views
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1 answer

Scala: 30: error: value partitions is not a member of String

Try this code: val rdd= sc.textFile (“file.txt”, 5) rdd.partitions.size Output ...READ MORE

Jul 29, 2019 in Apache Spark by Nijit
 • 2,796 views
0 votes
1 answer

What is Lazy val in Scala?

Hey, Scala executes a val when we define ...READ MORE

Jul 29, 2019 in Apache Spark by Gitika
 • 65,910 points • 988 views
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1 answer

What is Case Class in Scala?

Hey, Scala case classes let us model immutable data. ...READ MORE

Jul 29, 2019 in Apache Spark by Gitika
 • 65,910 points • 809 views
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what is an anonymous function Scala?

Hi, An anonymous function in Scala is a ...READ MORE

Jul 29, 2019 in Apache Spark by Gitika
 • 65,910 points • 861 views
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1 answer

Consider for-comprehensions in Scala. What are they syntactic sugars for?

Hi, A for-comprehension is one way to carry ...READ MORE

Jul 29, 2019 in Apache Spark by Gitika
 • 65,910 points • 394 views
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1 answer

What is Options in Scala?

Hey, A Scala Option is a kind of ...READ MORE

Jul 26, 2019 in Apache Spark by Gitika
 • 65,910 points • 401 views
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1 answer

What is tail-recursion in Scala?

Hey, Recursion is when a function makes a ...READ MORE

Jul 26, 2019 in Apache Spark by Gitika
 • 65,910 points • 570 views
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1 answer

What is the work of Yield Keyword in Scala?

Hey, Used with a loop, yield produces a value for ...READ MORE

Jul 26, 2019 in Apache Spark by Gitika
 • 65,910 points • 586 views
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1 answer

How to append a list in Scala?

Hey, For this purpose, we use the single ...READ MORE

Jul 26, 2019 in Apache Spark by Gitika
 • 65,910 points • 5,440 views
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1 answer

Different types of identifiers in Scala?

Hey, We have four kinds of identifiers in ...READ MORE

Jul 26, 2019 in Apache Spark by Gitika
 • 65,910 points • 941 views
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1 answer

How does Closure function works in Scala?

Hi, A closure in Scala is a function ...READ MORE

Jul 26, 2019 in Apache Spark by Gitika
 • 65,910 points • 457 views
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What is a lens in Scala?

Hi, A lens is an abstraction from functional ...READ MORE

Jul 26, 2019 in Apache Spark by Gitika
 • 65,910 points • 844 views
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1 answer

What is function currying in Scala?

Hi, With Scala Currying, we can take a ...READ MORE

Jul 26, 2019 in Apache Spark by Gitika
 • 65,910 points • 623 views
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1 answer

How to call the Debug Mode in PySpark?

As far as I understand your intentions ...READ MORE

Jul 26, 2019 in Apache Spark by ravikiran
 • 4,620 points • 5,566 views
0 votes
1 answer

How to use nested function in Scala?

Hey, With Scala, we can define a Scala ...READ MORE

Jul 26, 2019 in Apache Spark by Gitika
 • 65,910 points
edited Jun 1, 2023 by Srinath • 790 views
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1 answer

How to use Scala anonymous functions and why do we use it?

Hi, Anonymous functions in Scala is the lightweight ...READ MORE

Jul 26, 2019 in Apache Spark by Gitika
 • 65,910 points • 646 views
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1 answer

Spark Submit: class does not exists

In the command, you have mentioned the ...READ MORE

Jul 26, 2019 in Apache Spark by Jimmy
 • 1,440 views
0 votes
1 answer

Spark: Read from Hive, store in HDFS

Below is an example of reading data ...READ MORE

Jul 26, 2019 in Apache Spark by Lohit
 • 2,479 views
0 votes
1 answer

How to create Scala Array with Range?

Hey, The range() method will give us integers ...READ MORE

Jul 25, 2019 in Apache Spark by Gitika
 • 65,910 points • 554 views
0 votes
1 answer

How to concatinating Arrays in scala?

Hey, We can append a Scala array to ...READ MORE

Jul 25, 2019 in Apache Spark by Gitika
 • 65,910 points • 1,160 views
0 votes
1 answer

How to process an Array in Scala?

Hi, We can use loop control structures to ...READ MORE

Jul 25, 2019 in Apache Spark by Gitika
 • 65,910 points • 428 views
0 votes
1 answer

How to declare Scala array?

Hi, We can declare Scala arrays in two ...READ MORE

Jul 25, 2019 in Apache Spark by Gitika
 • 65,910 points • 539 views
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