Most viewed questions in Big Data Hadoop

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How setrep command is used and what is the description to this?

Hi, This HDFS command is used to change ...READ MORE

Jun 19, 2019 in Big Data Hadoop by Gitika
 • 65,890 points • 6,273 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 • 6,270 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 • 6,232 views
+1 vote
1 answer

Hadoop Installation Issue on Windows

Below is the main error you are ...READ MORE

Mar 26, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 6,229 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
 • 6,225 views
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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
 • 69,230 points • 6,224 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
 • 6,197 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
 • 6,150 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
 • 6,130 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 • 6,107 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 • 6,105 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 • 5,993 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
 • 69,230 points • 5,939 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
 • 69,230 points • 5,934 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
 • 69,230 points • 5,926 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
 • 65,890 points
edited Jun 26, 2019 by Gitika • 5,909 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 • 5,880 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
 • 69,230 points • 5,874 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
 • 5,846 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
 • 69,230 points • 5,825 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 • 5,816 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 • 5,809 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
 • 5,797 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
 • 69,230 points • 5,774 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
 • 69,230 points • 5,774 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 • 5,761 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
 • 69,230 points • 5,751 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
 • 69,230 points • 5,750 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 • 5,742 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
 • 65,890 points • 5,742 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 • 5,740 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
 • 69,230 points • 5,719 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
 • 5,661 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
 • 65,890 points • 5,639 views
0 votes
1 answer

What is SerDe in Hadoop Hive?

The SerDe interface allows you to instruct ...READ MORE

Nov 21, 2018 in Big Data Hadoop by Akshay
 • 5,632 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
 • 65,890 points • 5,625 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 • 5,592 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
 • 69,230 points • 5,584 views
0 votes
1 answer

How hadoop mapreduce job is submitted to worker nodes?

Alright, I think you are basically looking ...READ MORE

Mar 30, 2018 in Big Data Hadoop by Ashish
 • 2,650 points • 5,584 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 • 5,550 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
 • 69,230 points • 5,546 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 • 5,506 views
0 votes
1 answer

Sqoop installation on Linux

Before installing Sqoop, make sure Hadoop is ...READ MORE

Feb 26, 2019 in Big Data Hadoop by Suman
 • 5,503 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
 • 9,390 points • 5,500 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
 • 65,890 points
edited Jun 11, 2019 by Gitika • 5,476 views
0 votes
1 answer

Hadoop Hive: recursively descending into subdirectories without partitions or editing hive-site.xml

 I set the following properties before I ...READ MORE

Nov 15, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 5,466 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
 • 69,230 points • 5,457 views
0 votes
1 answer

Hive local inpath gives invalid path error

You are using the below command to ...READ MORE

May 23, 2019 in Big Data Hadoop by Jill
 • 5,449 views
0 votes
1 answer

How can I access S3/S3n from a local Hadoop 2.6 installation?

For some reason, the jar hadoop-aws-[version].jar which contains the ...READ MORE

Oct 3, 2018 in Big Data Hadoop by digger
 • 26,740 points • 5,388 views
0 votes
1 answer

Command to get status of all running Oozie workflow

Hey, You can use this command to get ...READ MORE

Jun 12, 2019 in Big Data Hadoop by Gitika
 • 65,890 points • 5,386 views
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