Trending questions in Apache Spark

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What is polyglot in spark?

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

Jul 1, 2019 in Apache Spark by Gitika
• 65,850 points
1,191 views
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Spark memory processing on a not temporary table

Temporary table is more like an index ...READ MORE

Jul 14, 2019 in Apache Spark by Suri
656 views
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Explain vararg arguments.

Hey, With varargs, we can pass a variable ...READ MORE

Jul 24, 2019 in Apache Spark by Gitika
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190 views
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Error: Loading data to mysql

You have to use sqoop to export data ...READ MORE

Jul 23, 2019 in Apache Spark by Janan
233 views
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How to use yield keyword in scala and why it is used instead of println?

Hi, The yield keyword is used because the ...READ MORE

Jul 6, 2019 in Apache Spark by Gitika
• 65,850 points
961 views
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Code to compute average in Apache Spark?

Hi, You can compute the average using this ...READ MORE

Jul 22, 2019 in Apache Spark by Gitika
• 65,850 points
222 views
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load/save in spark

The reason why you are able to ...READ MORE

Jul 5, 2019 in Apache Spark by Firoz
965 views
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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
5,109 views
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Appending " to a string in Scala

1) Use the concat() function. Refer to the below ...READ MORE

Jul 23, 2019 in Apache Spark by Ritu
185 views
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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
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959 views
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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
• 65,850 points
1,006 views
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What is immutabiliity in Spark?

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

Jul 23, 2019 in Apache Spark by Risha
148 views
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How can we iterate any function using "foreach" function in scala?

Hi, Yes, "foreach" function you use because it will ...READ MORE

Jul 5, 2019 in Apache Spark by Gitika
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878 views
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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
• 65,850 points
936 views
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Can we change the path where the Hive data is stored in HDFS?

Yes, you can but it has to ...READ MORE

Jul 14, 2019 in Apache Spark by Yogi
491 views
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Spark on Yarn

If you just want to get your ...READ MORE

Jul 18, 2019 in Apache Spark by ravikiran
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254 views
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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
2,692 views
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Error Loading data to mysql in Spark

You have to use sqoop to export data ...READ MORE

Jul 11, 2019 in Apache Spark by Jishan
435 views
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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
• 65,850 points
694 views
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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
402 views
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1 answer

Spark foldbykey doubt

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

Jun 19, 2019 in Apache Spark by Tina
1,333 views
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Passing condition dynamically to Spark application.

You can try this: d.filter(col("value").isin(desiredThings: _*)) and if you ...READ MORE

Feb 19, 2019 in Apache Spark by Omkar
• 69,210 points
6,501 views
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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
• 65,850 points
636 views
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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
392 views
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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 698 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
3,280 views
0 votes
1 answer

Working of map function on data

The map function creates an array of ...READ MORE

Jul 11, 2019 in Apache Spark by Krish
286 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
• 65,850 points
661 views
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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
• 65,850 points
611 views
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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
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608 views
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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
1,100 views
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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
• 65,850 points
573 views
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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
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340 views
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What is SparkCore functionalities?

Hey, Spark Core is a base engine of ...READ MORE

Jul 4, 2019 in Apache Spark by Gitika
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362 views
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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
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302 views
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How to create RDD as string file?

Can anyone suggest how to create RDD ...READ MORE

Jul 5, 2019 in Apache Spark by anand
362 views
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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
• 65,850 points
250 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
• 65,850 points
223 views
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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
• 65,850 points
238 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
• 65,850 points
235 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
• 65,850 points
202 views
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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
• 65,850 points
199 views
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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
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211 views
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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
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241 views
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What is persist() in Spark?

Hi, Spark’s RDDs are by default recomputed each ...READ MORE

Jul 2, 2019 in Apache Spark by Gitika
• 65,850 points
257 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
• 65,850 points
275 views
0 votes
0 answers

Why doesn't my Spark Yarn client runs on all available worker machines?

I am running an application on Spark ...READ MORE

Feb 22, 2019 in Apache Spark by Uzair Ahmad

edited Feb 22, 2019 by Omkar 5,877 views
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Spark: Saving file csv

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

May 22, 2019 in Apache Spark by Rishi
1,978 views
0 votes
1 answer

Spark to check if a particular string exists in a file

You can use this: lines = sc.textFile(“hdfs://path/to/file/filename.txt”); def isFound(line): if ...READ MORE

Mar 15, 2019 in Apache Spark by Raj
4,732 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
1,714 views