Trending questions in Big Data Hadoop

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How to change block size in Hadoop dynamically?

Hi@akhtar, By default, the block size is 64MB ...READ MORE

Sep 25, 2020 in Big Data Hadoop by akhtar
 • 38,260 points • 3,289 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 19, 2020 in Big Data Hadoop by MD
 • 95,460 points • 2,264 views
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1 answer

IOException: All datanodes are bad.

Hi@akhtar, As we know HDFS works in a ...READ MORE

Oct 15, 2020 in Big Data Hadoop by MD
 • 95,460 points • 2,383 views
0 votes
1 answer

How to use scala map as mutable map?

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

Nov 17, 2020 in Big Data Hadoop by Gitika
 • 65,770 points • 935 views
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1 answer

If i enable zookeeper secrete manager getting java file not found

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

Nov 23, 2020 in Big Data Hadoop by Gitika
 • 65,770 points • 706 views
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1 answer

How to execute scala programming?

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

Nov 16, 2020 in Big Data Hadoop by Gitika
 • 65,770 points • 936 views
0 votes
1 answer

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

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

Nov 20, 2020 in Big Data Hadoop by Gitika
 • 65,770 points • 750 views
0 votes
1 answer

How to change default block size in Hadoop Cluster?

Hi@akhtar, You can change the default block size ...READ MORE

Oct 3, 2020 in Big Data Hadoop by MD
 • 95,460 points • 2,814 views
0 votes
1 answer

Validating HA for ranger KMS

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

Nov 9, 2020 in Big Data Hadoop by MD
 • 95,460 points • 1,245 views
+1 vote
1 answer

How to delete sqoop job?

get the list of jobs  ==========   sqoop ...READ MORE

Feb 1, 2022 in Big Data Hadoop by sudhakar
edited Mar 5 • 4,952 views
0 votes
1 answer

How to declare a variable in Scala?

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

Nov 16, 2020 in Big Data Hadoop by Gitika
 • 65,770 points • 793 views
0 votes
1 answer

How to import scala packages?

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

Nov 16, 2020 in Big Data Hadoop by Gitika
 • 65,770 points • 781 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 20, 2020 in Big Data Hadoop by MD
 • 95,460 points • 1,958 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, 2020 in Big Data Hadoop by MD
 • 95,460 points • 1,043 views
0 votes
1 answer

How to start working with scala?

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

Nov 16, 2020 in Big Data Hadoop by Gitika
 • 65,770 points • 737 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 17, 2020 in Big Data Hadoop by Gitika
 • 65,770 points • 730 views
0 votes
1 answer

Where are Hadoop's task log files stored?

it gets stored on the local disk ...READ MORE

Dec 25, 2022 in Big Data Hadoop by akshith_ir
edited Mar 5 • 1,838 views
0 votes
1 answer

Sqoop practice in Edureka VM

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

Nov 16, 2020 in Big Data Hadoop by MD
 • 95,460 points • 715 views
0 votes
1 answer

How to create Scala Maps?

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

Nov 17, 2020 in Big Data Hadoop by Gitika
 • 65,770 points • 649 views
0 votes
1 answer

How to store datasets from Pig to HDFS?

Hi Guys, You can store the loaded data ...READ MORE

Oct 15, 2020 in Big Data Hadoop by MD
 • 95,460 points • 2,105 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, 2020 in Big Data Hadoop by MD
 • 95,460 points • 1,891 views
0 votes
1 answer

How to configure Hadoop Client?

Hi@akhtar, To configure the Hadoop Client, you need ...READ MORE

Sep 25, 2020 in Big Data Hadoop by MD
 • 95,460 points • 2,899 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, 2020 in Big Data Hadoop by MD
 • 95,460 points • 1,119 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, 2020 in Big Data Hadoop by MD
 • 95,460 points • 954 views
0 votes
0 answers

Hi. I keep on encountering the follow error when running conf in flume via flume-ng at line 189. Any possible solutions?

Running FLUME agent :     class: org.apache.flume.node.Application     arguments: -n agent1 ...READ MORE

Apr 23, 2020 in Big Data Hadoop by anonymous
 • 120 points • 1,575 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, 2020 in Big Data Hadoop by MD
 • 95,460 points • 948 views
0 votes
1 answer

Change permissions of a file in HDFS.

Hi@akhtar, You can use the Chmod command to ...READ MORE

Oct 1, 2020 in Big Data Hadoop by MD
 • 95,460 points • 2,567 views
0 votes
1 answer

Ranger Kms having multiple instance enabled.

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

Oct 23, 2020 in Big Data Hadoop by MD
 • 95,460 points • 1,603 views
0 votes
1 answer

Checksum verification in Hadoop.

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

Oct 15, 2020 in Big Data Hadoop by MD
 • 95,460 points • 1,751 views
0 votes
1 answer

Monitoring Hadoop with Prometheus JMX

Hi@Som, This error is not related to Prometheus ...READ MORE

Sep 14, 2020 in Big Data Hadoop by MD
 • 95,460 points • 3,047 views
0 votes
1 answer

How to get resource utilized(memory and CPU) by each hive query which is running under single application Id?

Hi@sivachandran, You can monitor the metrics of your ...READ MORE

Sep 18, 2020 in Big Data Hadoop by MD
 • 95,460 points • 2,840 views
0 votes
1 answer

Ranger kms create key failed

Hi@shllpa, I have checked your file. All seems ...READ MORE

Oct 6, 2020 in Big Data Hadoop by MD
 • 95,460 points • 2,051 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, 2020 in Big Data Hadoop by MD
 • 95,460 points • 1,454 views
0 votes
1 answer

HI i was trying to install hadoop but i get these error....Format HDFS Namenode Error: Could not find or load main class ”-Djava.library.path=.home.hadoop.hadoop-3.2.1.lib"

Hi@bezz, Hadoop builds on top of Java. So ...READ MORE

Oct 7, 2020 in Big Data Hadoop by MD
 • 95,460 points • 1,899 views
0 votes
1 answer

How to change the default replication factor in Hadoop?

Hi@akhtar, You can change the default replication factor from the ...READ MORE

Oct 3, 2020 in Big Data Hadoop by MD
 • 95,460 points • 2,085 views
0 votes
1 answer

Ranger kms is not coming up

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

Oct 19, 2020 in Big Data Hadoop by MD
 • 95,460 points • 1,315 views
0 votes
1 answer

How to upload files in Hadoop Cluster?

Hi@akhtar, To upload a file in Hadoop Cluster, ...READ MORE

Sep 25, 2020 in Big Data Hadoop by MD
 • 95,460 points • 2,292 views
0 votes
1 answer

Setting up Hadoop Multi-node cluster on windows 10 systems

Hi@Hassan, You can do it windows system as ...READ MORE

Oct 1, 2020 in Big Data Hadoop by MD
 • 95,460 points • 2,045 views
0 votes
1 answer

How to create hive table without location?

Hi@akhtar, We can create a hive table for ...READ MORE

Oct 16, 2020 in Big Data Hadoop by MD
 • 95,460 points • 1,405 views
0 votes
1 answer

Multiple rows to columns in hive

Hi, You need to create your own customize ...READ MORE

Sep 4, 2020 in Big Data Hadoop by MD
 • 95,460 points • 3,188 views
0 votes
2 answers

While typing 'hdfs fs -mkdir/prem' command I'm getting below error. Could not find or load main class fs and caused by java.lang.ClassNotFoundException:fs

Hi, @premkumar, ideally, you should be using hdfs dfs ...READ MORE

Aug 7, 2020 in Big Data Hadoop by Gitika
 • 65,770 points • 4,300 views
0 votes
1 answer

How to load dataset in Pig?

Hi@akhtar, You can run the load command in ...READ MORE

Oct 14, 2020 in Big Data Hadoop by MD
 • 95,460 points • 1,306 views
0 votes
1 answer

How to start Grunt shell in Local mode in Pig?

Hi@akhtar, You can invoke the Grunt shell in ...READ MORE

Oct 14, 2020 in Big Data Hadoop by MD
 • 95,460 points • 1,288 views
0 votes
1 answer

How to start Hadoop daemons?

Hi@MD, Before starting with the HDFS command, you have ...READ MORE

Oct 15, 2020 in Big Data Hadoop by akhtar
 • 38,260 points
edited Oct 16, 2020 by akhtar • 1,230 views
+2 votes
1 answer

FileStreamSink: Error while looking for metadata directory. java.lang.IllegalArgumentException: java.net.UnknownHostException: hive

Hi@akhtar, You tried to read file from your ...READ MORE

Feb 13, 2020 in Big Data Hadoop by MD
 • 95,460 points • 11,665 views
0 votes
1 answer

Drop a table in Hive.

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

Oct 19, 2020 in Big Data Hadoop by MD
 • 95,460 points • 993 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, 2020 in Big Data Hadoop by MD
 • 95,460 points • 1,025 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, 2020 in Big Data Hadoop by MD
 • 95,460 points • 1,007 views
0 votes
1 answer

HA ranger KMS ,

Hi@Shilpa, If you have installed Ranger through Ambari ...READ MORE

Oct 15, 2020 in Big Data Hadoop by MD
 • 95,460 points • 1,022 views
0 votes
1 answer

How to invoke the Grunt shell in MapReduce mode in Pig?

Hi@akhtar, You can invoke the Grunt shell in ...READ MORE

Oct 15, 2020 in Big Data Hadoop by MD
 • 95,460 points • 1,017 views
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