Most viewed questions in Big Data Hadoop

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1 answer

Spark - load CSV file as DataFrame?

spark-csv is part of core Spark functionality ...READ MORE

Sep 25, 2018 in Big Data Hadoop by slayer
 • 29,370 points • 7,193 views
0 votes
1 answer

How do I include all the Hadoop dependencies using Maven?

This is a dependency mismatch error. I ...READ MORE

Apr 10, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 7,104 views
+1 vote
2 answers

Execute Pig Script from Grunt Shell

From your current directory run  pig -x local Then ...READ MORE

Oct 25, 2018 in Big Data Hadoop by Kunal
 • 7,006 views
0 votes
1 answer

I get an error stating- Hadoop: «ERROR : JAVA_HOME is not set». How to resolve this?

Make sure that you have removed the ...READ MORE

Aug 7, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 6,989 views
0 votes
1 answer

How Namenode handles data node failures?

Let me explain you the whole scenario. NameNode ...READ MORE

Jul 11, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 6,984 views
0 votes
2 answers

Installing HBase on windows

This procedure worked for me. https://medium.com/@bishupaulose/install ...READ MORE

Aug 16, 2019 in Big Data Hadoop by Sam
 • 6,938 views
0 votes
1 answer

Why is Hive called as Data Warehouse?

Hive is a data warehouse infrastructure tool ...READ MORE

Jul 26, 2019 in Big Data Hadoop by Joshua
 • 6,933 views
0 votes
1 answer

What does Commodity Hardware in Hadoop World mean?

An important component of the Hadoop Ecosystem ...READ MORE

Dec 9, 2021 in Big Data Hadoop by Kavya
 • 700 points • 6,907 views
0 votes
1 answer

I am receiving a warning which says: Failed to locate the winutils binary in the Hadoop binary path

I see that you are facing multiple ...READ MORE

May 31, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 6,897 views
0 votes
1 answer

Unzip files in hdfs

To unzip a gzipped (or bzipped) file, ...READ MORE

Jul 31, 2019 in Big Data Hadoop by Joe
 • 6,835 views
0 votes
1 answer

Unable to move Hadoop Hive tables from Source to Destination.

First, check the permissions of HDFS Directory ...READ MORE

Dec 1, 2018 in Big Data Hadoop by Omkar
 • 69,180 points • 6,765 views
0 votes
1 answer

Multiple input for MapReduce job

We use MultipleInputs class which supports MapReduce ...READ MORE

Jun 20, 2019 in Big Data Hadoop by Jim
 • 6,763 views
0 votes
1 answer

Warning: Unable to load Hadoop Native Library for your platform. [closed]

 I had the same issue. It's solved ...READ MORE

Jun 28, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 6,716 views
+1 vote
1 answer

which version of sqoop i install for hadoop3.1.1 ?

Hi @lucky! The latest version of Sqoop available ...READ MORE

Feb 7, 2019 in Big Data Hadoop by Omkar
 • 69,180 points • 6,699 views
0 votes
1 answer

Hadoop Java Error: java.lang.NoClassDefFoundError: WordCount (wrong name: org/myorg/WordCount)

Hey, try this code import java.io.IOException; import java.util.Iterator; import java.util.StringTokenizer; import ...READ MORE

Sep 19, 2018 in Big Data Hadoop by slayer
 • 29,370 points • 6,697 views
0 votes
1 answer

How to download hadoop jar files for adding eclipse

Hi@Manl, To import jar file in your Eclipse ...READ MORE

Jul 20, 2020 in Big Data Hadoop by MD
 • 95,460 points • 6,650 views
0 votes
1 answer

What does NameNode stores and where it stores?

NameNode records the metadata of all the ...READ MORE

Apr 15, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 6,645 views
0 votes
1 answer

apache.spark.sql.AnalysisException: Text data source does not support int data type.;

Hi@akhtar, I think your output is in different ...READ MORE

Feb 13, 2020 in Big Data Hadoop by MD
 • 95,460 points • 6,612 views
0 votes
1 answer

SQOOP Export command failing

First create a table, which should have ...READ MORE

Jan 7, 2019 in Big Data Hadoop by Omkar
 • 69,180 points • 6,612 views
0 votes
1 answer

Command to see the indexes of a table in Hive?

Hey, The command you can use to see ...READ MORE

Jun 26, 2019 in Big Data Hadoop by Gitika
 • 65,730 points
edited Jun 26, 2019 by Gitika • 6,601 views
0 votes
1 answer

Which of the following is the daemon of Hadoop?

Hadoop is an open-source software framework for ...READ MORE

Dec 10, 2021 in Big Data Hadoop by CoderGirl
 • 500 points • 6,578 views
0 votes
1 answer

Parquet to ORC format in Hive

Follow the below steps to load the ...READ MORE

Feb 15, 2019 in Big Data Hadoop by Raj
 • 6,552 views
0 votes
1 answer

error:- /zookeeper_server.pid: Permission denied FAILED TO WRITE PID

Hey, The default zookeeper installation (tar extract) comes ...READ MORE

May 27, 2019 in Big Data Hadoop by Gitika
 • 65,730 points • 6,536 views
0 votes
1 answer

Hive partitioning: Dynamic and static

Partitions are created depending on the end ...READ MORE

Feb 1, 2019 in Big Data Hadoop by Omkar
 • 69,180 points • 6,510 views
+1 vote
2 answers

What does hadoop fs -du command gives as output?

du command is used for to see ...READ MORE

Jul 24, 2019 in Big Data Hadoop by Lokesh Singh
 • 6,508 views
0 votes
1 answer

Hadoop Hive: ClassNotFoundException: org.apache.hive.jdbc.HiveDriver

You have to use the right dependency <dependency> ...READ MORE

Dec 11, 2018 in Big Data Hadoop by Omkar
 • 69,180 points • 6,460 views
0 votes
1 answer

Hadoop: Format namenode gives error: Shutting down NameNode at java.net.UnknownHostException

UnknownHostException is thrown when hadoop tries to resolve ...READ MORE

Nov 12, 2018 in Big Data Hadoop by Omkar
 • 69,180 points • 6,451 views
0 votes
1 answer

How to show all partitions of a table in Hive?

Hi@akhtar, You can list down all the partitions ...READ MORE

Dec 18, 2020 in Big Data Hadoop by MD
 • 95,460 points • 6,447 views
0 votes
1 answer

How to print the content of a file in console present in HDFS?

Yes, you can use hdfs dfs command ...READ MORE

Apr 19, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 6,433 views
0 votes
2 answers

Hive update and delete limitations

Vinyl-like crackle sounds. And what is my ...READ MORE

May 3, 2020 in Big Data Hadoop by Carter
 • 140 points • 6,415 views
–1 vote
1 answer

unable to start hive server

It seems that your hive server is ...READ MORE

Jan 2, 2019 in Big Data Hadoop by Omkar
 • 69,180 points • 6,379 views
0 votes
1 answer

How to find the number of blocks a hdfs file is divided into?

Yes. you can use the hadoop fsck command to do ...READ MORE

Nov 30, 2018 in Big Data Hadoop by Omkar
 • 69,180 points • 6,331 views
0 votes
1 answer

What is grunt shell in pig?

Hey, Grunt shell is a shell command.The Grunts ...READ MORE

May 6, 2019 in Big Data Hadoop by Gitika
 • 65,730 points • 6,313 views
0 votes
1 answer

How to resolve corrupted blocks in Hadoop?

You can use hdfs fsck / to ...READ MORE

Jul 5, 2019 in Big Data Hadoop by Nandini
 • 6,308 views
0 votes
1 answer

Difference between hive.exec.compress.output=true; and mapreduce.output.fileoutputformat.compress=true;

Hey there! The definition of these two properties ...READ MORE

Dec 28, 2018 in Big Data Hadoop by Omkar
 • 69,180 points • 6,306 views
0 votes
1 answer

What is the command to navigate in HDFS?

First of all there is no command ...READ MORE

Apr 27, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 6,294 views
0 votes
1 answer

Hadoop: How to copy directory from local system to hdfs using Java code?

Just use the FileSystem's copyFromLocalFile method. If the source Path ...READ MORE

Nov 14, 2018 in Big Data Hadoop by Omkar
 • 69,180 points • 6,293 views
0 votes
1 answer

Hadoop: localhost: Error: JAVA_HOME is not set.

Seems like PATH problem in hadoop-env.sh file. Try ...READ MORE

Nov 6, 2018 in Big Data Hadoop by Omkar
 • 69,180 points • 6,278 views
0 votes
1 answer

What is the role of Job tracker Hadoop?

Job tracker's function is resource management, tracking ...READ MORE

Apr 9, 2019 in Big Data Hadoop by Gitika
 • 65,730 points • 6,277 views
0 votes
1 answer

Spark.read.csv to create RDD into Dataframe

You can use a case class and ...READ MORE

Jan 22, 2019 in Big Data Hadoop by Omkar
 • 69,180 points • 6,251 views
0 votes
2 answers

Why we require SSH during hadoop installation?

Hey, SSH setup is required to do different ...READ MORE

Jun 11, 2019 in Big Data Hadoop by Gitika
 • 65,730 points
edited Jun 11, 2019 by Gitika • 6,243 views
0 votes
1 answer

How to delete a file from Hadoop hdfs using java?

Try this: FileSystem fs = FileSystem.get(getConf()); fs.delete(new ...READ MORE

Nov 28, 2018 in Big Data Hadoop by Omkar
 • 69,180 points • 6,231 views
0 votes
1 answer

Error: Execution Error, Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.mr.MapRedTask. Permission denied:

Hey, The error you are getting because the ...READ MORE

May 15, 2019 in Big Data Hadoop by Gitika
 • 65,730 points • 6,188 views
0 votes
1 answer

Why is HDFS used for the applications with large data sets, and not for the multiple small files?

HDFS is more efficient for a large ...READ MORE

Dec 19, 2018 in Big Data Hadoop by Neha
 • 6,300 points • 6,183 views
0 votes
2 answers

Command to check the Hadoop distribution as well as it’s version which is installed in my cluster

One of the options to check the ...READ MORE

Apr 15, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 6,160 views
0 votes
1 answer

How to clear yarn cache?

Yarn has a command by default to clear ...READ MORE

Feb 5, 2019 in Big Data Hadoop by Omkar
 • 69,180 points • 6,147 views
+2 votes
1 answer

How to calculate Maximum salary of the employee with the name using the Map Reduce Technique

Please try the below code and it ...READ MORE

Jul 25, 2018 in Big Data Hadoop by Neha
 • 6,300 points • 6,146 views
0 votes
1 answer

ERROR: org.apache.hadoop.hbase.ipc.ServerNotRunningYetException: Server is not running yet!

Hi@akhtar, This error occurs if the hbase server ...READ MORE

Mar 30, 2020 in Big Data Hadoop by MD
 • 95,460 points • 6,128 views
0 votes
1 answer

error: value update is not a member of scala.collection.immutable.Map[String, Int]

Yes, If you try to update the value of ...READ MORE

Nov 17, 2020 in Big Data Hadoop by Gitika
 • 65,730 points • 6,123 views
–1 vote
1 answer

Apache Spark - Nested JSON array to flatten columns

It depends on the structure of your ...READ MORE

Jan 2, 2019 in Big Data Hadoop by Omkar
 • 69,180 points • 6,118 views
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