Latest questions in Apache Spark

+1 vote
0 answers

How to create a list of RDDs(or RDD of RDDs, if possible) from a single JavaRDD<List<Integers>> in Java?

Hi, I have the input RDD as a ...READ MORE

6 days ago in Apache Spark by itsroops
 • 130 points • 28 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

5 days ago in Apache Spark by Sirish
 • 160 points • 63 views
+2 votes
0 answers

Spark code takes too much time to run on cluster

I have written a Spark application. My ...READ MORE

Jan 3 in Apache Spark by asif
 • 140 points • 32 views
+1 vote
0 answers

how to access hive view using spark2

We do not have access to hive ...READ MORE

Dec 29, 2019 in Apache Spark by anonymous
 • 130 points • 37 views
+1 vote
2 answers

sparkstream.textfilstreaming(localpathdirectory). I am getting empty results

Hey @c.kothamasu You should copy your file to ...READ MORE

Nov 7, 2019 in Apache Spark by Manas
 • 89 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
 • 395 views
+1 vote
1 answer

How to convert a json file structure with values in single quotes to quoteless ?

You can do this by turning off ...READ MORE

Oct 4, 2019 in Apache Spark by Jisha
 • 229 views
+1 vote
1 answer

Cannot resolve Error In Spark when filter records with two where condition

Try df.where($"cola".isNotNull && $"cola" =!= "" && !$"colb".isin(2,3)) your ...READ MORE

Dec 13, 2019 in Apache Spark by Alexandru
 • 450 points
edited Dec 13, 2019 by Alexandru • 115 views
+1 vote
0 answers

Difference Between rdd dataframe dataset [closed]

Sep 12, 2019 in Apache Spark by Rajesh pagadala
closed Sep 13, 2019 by Omkar • 130 views
0 votes
1 answer

Primary keys in Apache Spark

I found the following solution to be ...READ MORE

Sep 11, 2019 in Apache Spark by ravikiran
 • 4,600 points • 105 views
0 votes
1 answer

How do I connect to a HIVE Meta store through a program in SparkSQL?

In spark 2.0.+ it should look something ...READ MORE

Sep 5, 2019 in Apache Spark by ravikiran
 • 4,600 points • 327 views
+1 vote
0 answers

What is the use case of map and flatMap? [closed]

What is the major use case for ...READ MORE

Aug 24, 2019 in Apache Spark by anonymous
 • 130 points
closed Aug 26, 2019 by Omkar • 114 views
+1 vote
1 answer

How to convert JSON file to AVRO file and vise versa

Try including the package while starting the ...READ MORE

Aug 26, 2019 in Apache Spark by Karan
 • 302 views
+1 vote
1 answer

How to extract record from one RDD using another RDD

Hey, you can use "contains" filter to extract ...READ MORE

Aug 23, 2019 in Apache Spark by Karan
 • 96 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
 • 450 points • 482 views
+1 vote
2 answers

Spark: Can we add column to dataframe?

Yes we can add columns to the ...READ MORE

Oct 24, 2019 in Apache Spark by Siva
 • 160 points • 90 views
0 votes
1 answer

Monitoring Spark application

Spark-submit jobs are also run from client/edge ...READ MORE

Aug 9, 2019 in Apache Spark by Umesh
 • 65 views
+1 vote
1 answer

Primary keys in Apache Spark

import sqlContext.implicits._ import org.apache.spark.sql.Row import org.apache.spark.sql.types.{StructType, StructField, LongType} val df ...READ MORE

Aug 9, 2019 in Apache Spark by ravikiran
 • 4,600 points • 298 views
+1 vote
1 answer

How to read a data from text file in Spark?

Hey, You can try this: from pyspark import SparkContext SparkContext.stop(sc) sc ...READ MORE

Aug 6, 2019 in Apache Spark by Gitika
 • 25,440 points • 800 views
0 votes
1 answer

How to start spark history server?

Hi, You can use this command to start ...READ MORE

Aug 6, 2019 in Apache Spark by Gitika
 • 25,440 points • 56 views
0 votes
1 answer

What is Spark UI and how to monitor a spark job?

Hey, Jobs- to view all the spark jobs Stages- ...READ MORE

Aug 6, 2019 in Apache Spark by Gitika
 • 25,440 points • 295 views
0 votes
1 answer

How to handle data shuffle in Spark

Hi, You can do it using map partition ...READ MORE

Aug 6, 2019 in Apache Spark by Gitika
 • 25,440 points • 133 views
0 votes
1 answer

How Foreach Operation works in Apache Spark?

Hi, foreach() operation is an action. It does not ...READ MORE

Aug 2, 2019 in Apache Spark by Gitika
 • 25,440 points • 245 views
0 votes
1 answer

How SortBykey() operation works in Spark?

Hey, sortByKey() is a transformation. It returns an RDD sorted ...READ MORE

Aug 2, 2019 in Apache Spark by Gitika
 • 25,440 points • 492 views
0 votes
1 answer

In how many modes Apache spark can run?

Hey, You can launch spark application in four ...READ MORE

Aug 2, 2019 in Apache Spark by Gitika
 • 25,440 points • 45 views
0 votes
1 answer

How to launch spark application in cluster mode in Spark?

Hi, To launch spark application in cluster mode, ...READ MORE

Aug 2, 2019 in Apache Spark by Gitika
 • 25,440 points • 292 views
0 votes
1 answer

How to create paired RDD using subString method in Spark?

Hi, If you have a file with id ...READ MORE

Aug 2, 2019 in Apache Spark by Gitika
 • 25,440 points • 162 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
 • 25,440 points • 876 views
0 votes
1 answer

By default how many partitions are created in RDD in Apache spark?

Well, it depends on the block of ...READ MORE

Aug 2, 2019 in Apache Spark by Gitika
 • 25,440 points • 129 views
0 votes
1 answer

Join in RDD using keys

Suppose you have two dataset results( id, ...READ MORE

Aug 2, 2019 in Apache Spark by Trisha
 • 50 views
0 votes
1 answer

Scala: save filtered data row by row using saveAsTextFile

Try this code, it worked for me: val ...READ MORE

Aug 2, 2019 in Apache Spark by Karan
 • 106 views
0 votes
1 answer

What is Hive on Spark?

Hi, Hive contains significant support for Apache Spark, ...READ MORE

Aug 2, 2019 in Apache Spark by Gitika
 • 25,440 points • 35 views
0 votes
1 answer

Can anyone explain the sparse vector in Spark?

Hey, A sparse vector is used for storing ...READ MORE

Aug 2, 2019 in Apache Spark by Gitika
 • 25,440 points • 385 views
0 votes
0 answers

How to define SparkConf?

Can anyone explain how to define SparkConf? READ MORE

Aug 1, 2019 in Apache Spark by Danish
 • 26 views
0 votes
1 answer

Scala - Error in Inheritance: <console>:: error: not found: value

You need to declare the variable which ...READ MORE

Aug 1, 2019 in Apache Spark by Karan
 • 433 views
0 votes
1 answer

Pyspark dataframe with random values

Hey @Esha, you can use this code. ...READ MORE

Aug 1, 2019 in Apache Spark by Zed
 • 1,070 views
0 votes
1 answer

Spark + Hive connectivity

The problem is probably with the command. ...READ MORE

Aug 1, 2019 in Apache Spark by Rishni
 • 154 views
+1 vote
1 answer

Scala: Convert text file data into ORC format using data frame

Converting text file to Orc: Using Spark, the ...READ MORE

Aug 1, 2019 in Apache Spark by Esha
 • 431 views
0 votes
1 answer

How to reverse a Scala list?

Hi, This reverses the order of elements in ...READ MORE

Jul 31, 2019 in Apache Spark by Gitika
 • 25,440 points • 53 views
0 votes
1 answer

How to use uniform list in Scala?

Hey, The method List.fill() creates a list and ...READ MORE

Jul 31, 2019 in Apache Spark by Gitika
 • 25,440 points • 145 views
0 votes
1 answer

How shallow copy carry out using Scala?

Hey, Scala uses the method copy() to carry ...READ MORE

Jul 31, 2019 in Apache Spark by Gitika
 • 25,440 points • 40 views
0 votes
1 answer

How to access variables in s string interpolation in Scala?

Hey, You can use below code to access variables ...READ MORE

Jul 31, 2019 in Apache Spark by Gitika
 • 25,440 points • 54 views
–2 votes
1 answer

What is the difference in Java’s “If..Else” and Scala’s “If..Else”? [closed]

Hey, Java’s “If. Else”: In Java, “If. Else” is a statement, ...READ MORE

Jul 31, 2019 in Apache Spark by Gitika
 • 25,440 points • 67 views
0 votes
1 answer

How to work with Matrix Multiplication in Apache Spark?

Hey, You can follow this below solution for ...READ MORE

Jul 31, 2019 in Apache Spark by Gitika
 • 25,440 points • 1,300 views
0 votes
1 answer

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
 • 25,440 points • 472 views
0 votes
1 answer

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
 • 25,440 points • 272 views
0 votes
1 answer

What is 'TRAITS' in Scala

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

Jul 31, 2019 in Apache Spark by Gitika
 • 25,440 points • 57 views
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