Most viewed questions in Apache Spark

0 votes
5 answers

How to change the spark Session configuration in Pyspark?

You aren't actually overwriting anything with this ...READ MORE

Dec 14, 2020 in Apache Spark by Gitika
 • 65,730 points • 127,888 views
0 votes
3 answers

Filtering a row in Spark DataFrame based on matching values from a list

Use the function as following: var notFollowingList=List(9.8,7,6,3,1) df.filter(col("uid").isin(notFollowingList:_*)) You can ...READ MORE

Jun 6, 2018 in Apache Spark by Shubham
 • 13,490 points • 93,598 views
+2 votes
14 answers

How to create new column with function in Spark Dataframe?

val coder: (Int => String) = v ...READ MORE

Apr 5, 2019 in Apache Spark by anonymous
edited Apr 5, 2019 by Omkar • 91,070 views
+1 vote
6 answers

groupByKey vs reduceByKey in Apache Spark.

ReduceByKey is the best for production. READ MORE

Mar 3, 2019 in Apache Spark by anonymous
 • 78,463 views
+1 vote
8 answers

How to replace null values in Spark DataFrame?

Hi, In Spark, fill() function of DataFrameNaFunctions class is used to replace ...READ MORE

Dec 15, 2020 in Apache Spark by MD
 • 95,460 points • 77,146 views
+5 votes
11 answers

Concatenate columns in apache spark dataframe

its late but this how you can ...READ MORE

Mar 21, 2019 in Apache Spark by anonymous
 • 73,973 views
+1 vote
8 answers

How to print the contents of RDD in Apache Spark?

Save it to a text file: line.saveAsTextFile("alicia.txt") Print contains ...READ MORE

Dec 10, 2018 in Apache Spark by Akshay
 • 63,257 views
+1 vote
2 answers

Spark: Dataframe vs Dataset

Recently, there are two new data abstractions ...READ MORE

Jul 29, 2019 in Apache Spark by Jackie
 • 46,468 views
+2 votes
4 answers

use length function in substring in spark

You can use the function expr val data ...READ MORE

May 3, 2018 in Apache Spark by kurt_cobain
 • 9,350 points • 44,318 views
+1 vote
3 answers

What is the difference between rdd and dataframes in Apache Spark ?

Comparison between Spark RDD vs DataFrame 1. Release ...READ MORE

Aug 28, 2018 in Apache Spark by shams
 • 3,670 points • 44,012 views
0 votes
1 answer

org.apache.spark.sql.AnalysisException: cannot resolve given input columns

The string Productivity has to be enclosed between single ...READ MORE

Jul 10, 2019 in Apache Spark by Tina
 • 43,745 views
+1 vote
1 answer

Is there any efficient way of dealing null values during concat functionality of pyspark.sql version 2.3.4?

When you concatenate any string with a ...READ MORE

Nov 6, 2019 in Apache Spark by Rishi
 • 41,337 views
+1 vote
3 answers

map() vs flatMap() in Spark

Spark map function expresses a one-to-one transformation. ...READ MORE

Jun 17, 2019 in Apache Spark by vishal
 • 180 points • 39,413 views
0 votes
1 answer

What's the difference between 'filter' and 'where' in Spark SQL?

Both 'filter' and 'where' in Spark SQL ...READ MORE

May 23, 2018 in Apache Spark by nitinrawat895
 • 11,380 points • 35,273 views
+1 vote
1 answer

Reading a text file through spark data frame

Try this: val df = sc.textFile("HDFS://nameservice1/user/edureka_168049/Structure_IT/samplefile.txt") df.collect() val df = ...READ MORE

Jul 24, 2019 in Apache Spark by Suri
 • 26,893 views
+2 votes
2 answers

py4j.protocol.Py4JError: org.apache.spark.api.python.PythonUtils.getEncryptionEnabled does not exist in the JVM

Using findspark is expected to solve the ...READ MORE

Jun 21, 2020 in Apache Spark by suvasish
 • 23,773 views
0 votes
1 answer

How to find the number of elements present in the array in a Spark DataFame column?

You can select the column and apply ...READ MORE

Jun 6, 2018 in Apache Spark by Shubham
 • 13,490 points • 23,076 views
+1 vote
2 answers

How can I convert Spark Dataframe to Spark RDD?

Assuming your RDD[row] is called rdd, you ...READ MORE

Jul 9, 2018 in Apache Spark by zombie
 • 3,790 points • 21,475 views
0 votes
1 answer

Error: No module named 'findspark'

Hi@akhtar, To import this module in your program, ...READ MORE

May 6, 2020 in Apache Spark by MD
 • 95,460 points • 21,213 views
0 votes
3 answers

How to transpose Spark DataFrame?

Please check the below mentioned links for ...READ MORE

Jan 1, 2019 in Apache Spark by anonymous
 • 20,840 views
0 votes
1 answer

How can I remove headers from dataframe?

You can use filter to do this. ...READ MORE

Feb 15, 2019 in Apache Spark by Aryan
 • 20,720 views
+1 vote
1 answer

is not a Parquet file. expected magic number at tail [80, 65, 82, 49] but found [51, 53, 10, 10]

Hi@akhtar, Here you are trying to read a ...READ MORE

Feb 3, 2020 in Apache Spark by MD
 • 95,460 points • 19,191 views
0 votes
1 answer

Spark: java.sql.SQLException: No suitable driver

The missing driver is the JDBC one ...READ MORE

Jul 24, 2019 in Apache Spark by John
 • 18,376 views
0 votes
1 answer

org.apache.spark.sql.AnalysisException: cannot resolve "`id`" given input columns

I have used a header-less csv file ...READ MORE

Jul 14, 2019 in Apache Spark by Puneet
 • 18,067 views
0 votes
3 answers

Sorting rows in descending order in Spark SQL

df.orderBy($"col".desc) - this works as well READ MORE

Jul 5, 2020 in Apache Spark by Sai
 • 160 points • 17,262 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 • 16,813 views
0 votes
1 answer

ImportError: No module named 'pyspark'

Hi@akhtar, By default pyspark in not present in ...READ MORE

May 6, 2020 in Apache Spark by MD
 • 95,460 points • 16,119 views
+1 vote
1 answer

How to assign a column in Spark Dataframe (PySpark) as a Primary Key?

spark do not have any concept of ...READ MORE

Jan 12, 2020 in Apache Spark by Sirish
 • 160 points • 15,410 views
0 votes
1 answer

How to select all columns with group by?

Try  df.select(df("*")).groupby("id").agg(sum("salary")) READ MORE

Sep 17, 2021 in Apache Spark by Parimi Pavan
edited Mar 5 • 14,856 views
0 votes
1 answer

Changing Column position in spark dataframe

Yes, you can reorder the dataframe elements. You need ...READ MORE

Apr 19, 2018 in Apache Spark by Ashish
 • 2,650 points • 14,465 views
0 votes
2 answers

Difference between createOrReplaceTempView and registerTempTable

I am pretty sure createOrReplaceTempView just replaced ...READ MORE

Sep 18, 2020 in Apache Spark by Nathan Mott
 • 14,339 views
0 votes
1 answer

How to save and retrieve the Spark RDD from HDFS?

You can save the RDD using saveAsObjectFile and saveAsTextFile method. ...READ MORE

May 29, 2018 in Apache Spark by Shubham
 • 13,490 points • 14,273 views
0 votes
1 answer

Is it better to have one large parquet file or lots of smaller parquet files?

Ideally, you would use snappy compression (default) ...READ MORE

May 23, 2018 in Apache Spark by nitinrawat895
 • 11,380 points • 14,215 views
0 votes
1 answer

Why do we use sc.parallelize?

Spark revolves around the concept of a ...READ MORE

Jul 11, 2019 in Apache Spark by Suman
 • 13,880 views
0 votes
3 answers

I don't understand the reason behind Spark RDD being immutable.

There are few reasons for keeping RDD ...READ MORE

Apr 18, 2019 in Apache Spark by santlal561987@gmail.com
 • 13,466 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 • 13,378 views
+2 votes
1 answer

Type mismatch error in scala

Hello, Your problem is here: val df_merge_final = df_merge .withColumn("version_key", ...READ MORE

Dec 13, 2019 in Apache Spark by Alexandru
 • 510 points • 13,229 views
0 votes
2 answers

Error : split value is not a member of org.apache.spark.sql.Row

var d=rdd2col.rdd.map(x=>x.split(",")) or val names=rd ...READ MORE

Aug 5, 2020 in Apache Spark by Ramkumar Ramasamy.
 • 12,860 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 • 12,744 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
 • 65,730 points • 12,407 views
0 votes
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
 • 65,730 points • 11,969 views
0 votes
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
 • 11,922 views
0 votes
1 answer

what are the spark job and spark task and spark staging ?

In a Spark application, when you invoke ...READ MORE

Mar 18, 2019 in Apache Spark by Pavan
 • 11,628 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
 • 11,335 views
0 votes
1 answer

Cache() vs persist() in Spark

The cache() is used only the default storage level ...READ MORE

Mar 8, 2019 in Apache Spark by Raj
 • 11,315 views
0 votes
1 answer

Difference between cogroup and full outer join in spark

Please go through the below explanation : Full ...READ MORE

Jul 14, 2019 in Apache Spark by Kiran
 • 10,487 views
0 votes
2 answers

How to use RDD filter with other function?

val x = sc.parallelize(1 to 10, 2)   // ...READ MORE

Aug 17, 2018 in Apache Spark by zombie
 • 3,790 points • 10,317 views
0 votes
1 answer

Spark, Scala: Load custom delimited file

You can load a DAT file into ...READ MORE

Jul 16, 2019 in Apache Spark by Shri
 • 10,205 views
0 votes
1 answer

what is Paired RDD and how to create paired RDD in Spark?

Hi, Paired RDD is a distributed collection of ...READ MORE

Aug 2, 2019 in Apache Spark by Gitika
 • 65,730 points • 10,008 views
+1 vote
2 answers

Apache Spark vs Apache Spark 2

Spark 2 doesn't differ much architecture-wise from ...READ MORE

Apr 24, 2018 in Apache Spark by kurt_cobain
 • 9,350 points • 10,007 views
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