Trending questions in Big Data Hadoop

+1 vote
11 answers

hadoop fs -put command?

put syntax: put <localSrc> <dest> copy syntax: copyF ...READ MORE

Dec 7, 2018 in Big Data Hadoop by Aditya
 • 41,611 views
+10 votes
11 answers

Hadoop “Unable to load native-hadoop library for your platform” warning

modify the glibc version.CentOS provides safe softwares ...READ MORE

Sep 10, 2018 in Big Data Hadoop by bug_seeker
 • 15,510 points • 32,753 views
+1 vote
2 answers

What is the best way to merge multi-part HDFS files into single file?

1. In order to merge two or ...READ MORE

Jul 29, 2019 in Big Data Hadoop by Tina
 • 12,166 views
0 votes
1 answer

How can I import data from mysql to hive tables with incremental data?

Hi@dharmendra, It is common to perform one-time ingestion ...READ MORE

8 hours ago in Big Data Hadoop by MD
 • 77,580 points • 7 views
0 votes
1 answer

If i enable zookeeper secrete manager getting java file not found

Hey, @Shilpa, What did you set the ownership ...READ MORE

7 hours ago in Big Data Hadoop by Gitika
 • 48,320 points • 12 views
0 votes
1 answer

How to know Hive and Hadoop versions from command prompt?

You can not get the hive version ...READ MORE

3 days ago in Big Data Hadoop by Gitika
 • 48,320 points • 16 views
0 votes
1 answer

How do I output the results of a HiveQL query to CSV?

A slight modification (adding the LOCAL keyword) will store ...READ MORE

3 days ago in Big Data Hadoop by Gitika
 • 48,320 points • 13 views
0 votes
1 answer

When to use Hadoop, HBase, Hive and Pig?

MapReduce is just a computing framework. HBase has ...READ MORE

3 days ago in Big Data Hadoop by Gitika
 • 48,320 points • 9 views
0 votes
1 answer

Difference between Pig and Hive? Why have both? [closed]

The hive was designed to appeal to ...READ MORE

3 days ago in Big Data Hadoop by Gitika
 • 48,320 points • 8 views
0 votes
1 answer

How to set variables in HIVE scripts

You need to use the special hiveconf for variable ...READ MORE

3 days ago in Big Data Hadoop by Gitika
 • 48,320 points • 6 views
0 votes
1 answer

User:hdfs not allowed to do 'DECRYPT_EEK' on 'key'.

Hi@Shilpa, I don't think you have given permission ...READ MORE

3 days ago in Big Data Hadoop by MD
 • 77,580 points • 12 views
0 votes
1 answer

copyFromLocal: `/home/SANDHYA/downloads/game.csv': No such file or directory

Hi@Namrata, I think you are using the wrong ...READ MORE

4 days ago in Big Data Hadoop by MD
 • 77,580 points • 16 views
0 votes
1 answer

How to use scala Map size() method?

The size() is utilized to find the number of ...READ MORE

6 days ago in Big Data Hadoop by Gitika
 • 48,320 points • 21 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

6 days ago in Big Data Hadoop by Gitika
 • 48,320 points • 17 views
0 votes
1 answer

How to use scala map as mutable map?

By default, Scala uses an immutable Map. ...READ MORE

6 days ago in Big Data Hadoop by Gitika
 • 48,320 points • 7 views
0 votes
1 answer

How to create Scala Maps?

Maps can be created in different ways ...READ MORE

6 days ago in Big Data Hadoop by Gitika
 • 48,320 points • 7 views
0 votes
1 answer

How to write a Scala program in script mode?

Open notepad and add the following code ...READ MORE

Nov 16 in Big Data Hadoop by Gitika
 • 48,320 points • 21 views
0 votes
1 answer

How to create an objects using a keyword new?

Example import java.io._ class Point(val xc: Int, val yc: ...READ MORE

Nov 16 in Big Data Hadoop by Gitika
 • 48,320 points • 11 views
0 votes
1 answer

How to declare a variable in Scala?

The following is an example program that ...READ MORE

Nov 16 in Big Data Hadoop by Gitika
 • 48,320 points • 11 views
0 votes
1 answer

How to import scala packages?

Scala packages can be imported so that ...READ MORE

Nov 16 in Big Data Hadoop by Gitika
 • 48,320 points • 9 views
0 votes
1 answer

How to execute scala programming?

We can execute a Scala program in ...READ MORE

Nov 16 in Big Data Hadoop by Gitika
 • 48,320 points • 10 views
0 votes
1 answer

How to start working with scala?

Scala can be installed on any UNIX ...READ MORE

Nov 16 in Big Data Hadoop by Gitika
 • 48,320 points • 7 views
0 votes
1 answer

Sqoop practice in Edureka VM

Hi, It is the same for all the ...READ MORE

Nov 16 in Big Data Hadoop by MD
 • 77,580 points • 11 views
0 votes
1 answer

Moving historyserver to another instance using curl command

Hi@Shilpa, You have double quotes inside a single ...READ MORE

Nov 9 in Big Data Hadoop by MD
 • 77,580 points • 29 views
0 votes
1 answer

Zookeeper server going down frequently.

Hi@B, There may be several reasons behind this. ...READ MORE

Nov 9 in Big Data Hadoop by MD
 • 77,580 points • 38 views
0 votes
2 answers

Unable to start YARN daemons. Error: Could not find or load main class org.apache.hadoop.yarn.server.resourcemanager.ResourceManager

Hi@Akshitha, This seems like a path issue. you ...READ MORE

Nov 9 in Big Data Hadoop by MD
 • 77,580 points • 52 views
0 votes
1 answer

HDP Upgrade Issue in 2.6.5.

Hi@B, There is a problem with the version. ...READ MORE

Nov 9 in Big Data Hadoop by MD
 • 77,580 points • 23 views
0 votes
1 answer

Map reduce history moving instance using curl .

Hi@Shilpa, First thing, you will lose your metadata. ...READ MORE

Nov 9 in Big Data Hadoop by MD
 • 77,580 points • 26 views
0 votes
1 answer

Validating HA for ranger KMS

Hi@Shilpa, It seems your user doesn't have the ...READ MORE

Nov 9 in Big Data Hadoop by MD
 • 77,580 points • 19 views
+1 vote
1 answer

Not able to create kms key using ambari.

Hi@Shilpa, There may be a problem with your ...READ MORE

Nov 4 in Big Data Hadoop by MD
 • 77,580 points • 40 views
0 votes
1 answer

Ranger Kms having multiple instance enabled.

Hi@Shllpa, First, you need to check the network ...READ MORE

Oct 23 in Big Data Hadoop by MD
 • 77,580 points • 54 views
0 votes
1 answer

How to copy file from Local file system to HDFS?

Hi@akhtar, You can copy files from your local ...READ MORE

Oct 19 in Big Data Hadoop by MD
 • 77,580 points • 89 views
0 votes
1 answer

Ranger kms is not coming up

Hi@Shilpa, There may be lots of reasons behind ...READ MORE

Oct 19 in Big Data Hadoop by MD
 • 77,580 points • 98 views
0 votes
1 answer

Drop an index from a Hive table.

Hi@akhtar, You can drop an index from the ...READ MORE

Oct 19 in Big Data Hadoop by MD
 • 77,580 points • 95 views
0 votes
1 answer

How to display the Access Control Lists (ACLs) of files and directories in HDFS?

Hi@akhtar, You can see the Access Control Lists (ACLs) ...READ MORE

Oct 19 in Big Data Hadoop by MD
 • 77,580 points • 53 views
0 votes
1 answer

How to create an index on Hive table?

Hi@akhtar, An Index is nothing but a pointer ...READ MORE

Oct 19 in Big Data Hadoop by MD
 • 77,580 points • 86 views
0 votes
1 answer

Copy a directory from one node in the cluster to another in HDFS.

Hi@akhtar, You can copy a directory from one ...READ MORE

Oct 19 in Big Data Hadoop by MD
 • 77,580 points • 45 views
0 votes
1 answer

How to add a column in Hive table?

Hi@akhtar, You can use the alter table command ...READ MORE

Oct 18 in Big Data Hadoop by MD
 • 77,580 points • 59 views
0 votes
1 answer

ERROR: Cannot set priority of datanode process

Hi@akhtar, You need to set JAVA_HOME and HADOOP_HOME ...READ MORE

Oct 15 in Big Data Hadoop by MD
 • 77,580 points • 185 views
0 votes
1 answer

Drop a table in Hive.

Hi@akhtar, When you drop a table from Hive ...READ MORE

Oct 18 in Big Data Hadoop by MD
 • 77,580 points • 31 views
0 votes
1 answer

How to rename the Hive table?

Hi@akhtar, You can rename the table name in ...READ MORE

Oct 18 in Big Data Hadoop by MD
 • 77,580 points • 26 views
0 votes
1 answer

How to write Reducer code for Hadoop?

Hi@akhtar, You can create a reducer code for ...READ MORE

Oct 16 in Big Data Hadoop by MD
 • 77,580 points • 42 views
0 votes
1 answer

How to write mapper code for Hadoop in Python?

Hi@akhtar, Any job in Hadoop must have two ...READ MORE

Oct 16 in Big Data Hadoop by MD
 • 77,580 points • 37 views
0 votes
1 answer

Error: Could not create the Java Virtual Machine in Hadoop.

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

Oct 15 in Big Data Hadoop by MD
 • 77,580 points • 64 views
0 votes
1 answer

How to find the status of MapReduce Job?

Hi@akhtar, You can run the Hadoop Job command ...READ MORE

Oct 16 in Big Data Hadoop by MD
 • 77,580 points • 22 views
0 votes
1 answer

How to find the number of blocks for a file in Hadoop?

Hi@akhtar, You can use Hadoop file system command to ...READ MORE

Oct 13 in Big Data Hadoop by MD
 • 77,580 points • 130 views
0 votes
1 answer

Checksum verification in Hadoop.

Hi@akhtar, Hadoop filesystem has Command to check the checksum ...READ MORE

Oct 15 in Big Data Hadoop by MD
 • 77,580 points • 40 views
0 votes
1 answer

Create hive table with location.

Hi@MD, We can also create a hive table ...READ MORE

Oct 15 in Big Data Hadoop by akhtar
 • 32,960 points • 24 views
0 votes
1 answer

How to update the existing record in HDFS?

Hi@akhtar, HDFS follows Write Once Read Many times ...READ MORE

Oct 15 in Big Data Hadoop by MD
 • 77,580 points • 33 views
0 votes
1 answer

mkdir: cannot create directory `/var/run/hadoop': Permission denied.

Hi@akhtar, You need to set the path of ...READ MORE

Oct 14 in Big Data Hadoop by MD
 • 77,580 points • 84 views
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