Most voted questions in Big Data Hadoop

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
 • 95,440 points • 610 views
0 votes
1 answer

Zookeeper server going down frequently.

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

Nov 9, 2020 in Big Data Hadoop by MD
 • 95,440 points • 1,797 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
 • 95,440 points • 672 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
 • 95,440 points • 695 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
 • 95,440 points • 603 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, 2020 in Big Data Hadoop by MD
 • 95,440 points • 2,255 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
 • 95,440 points • 1,011 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
 • 95,440 points • 1,116 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 20, 2020 in Big Data Hadoop by MD
 • 95,440 points • 2,855 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
 • 95,440 points • 1,159 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
 • 95,440 points • 1,048 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
 • 95,440 points • 512 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
 • 95,440 points • 1,597 views
0 votes
1 answer

How to rename the Hive table?

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

Oct 19, 2020 in Big Data Hadoop by MD
 • 95,440 points • 11,007 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
 • 95,440 points • 942 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
 • 95,440 points • 676 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, 2020 in Big Data Hadoop by MD
 • 95,440 points • 545 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
 • 95,440 points • 665 views
0 votes
1 answer

Create hive table with location.

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

Oct 16, 2020 in Big Data Hadoop by akhtar
 • 38,230 points • 428 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
 • 95,440 points • 900 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 16, 2020 in Big Data Hadoop by MD
 • 95,440 points • 1,851 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, 2020 in Big Data Hadoop by MD
 • 95,440 points • 2,556 views
0 votes
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
 • 95,440 points • 1,862 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, 2020 in Big Data Hadoop by MD
 • 95,440 points • 10,785 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
 • 95,440 points • 1,436 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
 • 38,230 points
edited Oct 16, 2020 by akhtar • 655 views
0 votes
1 answer

Enable HA for ranger KMS.

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

Oct 15, 2020 in Big Data Hadoop by MD
 • 95,440 points • 541 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
 • 95,440 points • 607 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
 • 95,440 points • 1,511 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
 • 95,440 points • 523 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
 • 95,440 points • 844 views
0 votes
1 answer

Execute the Pig script in Local mode.

Hi@akhtar, You can write an entire Pig Latin ...READ MORE

Oct 14, 2020 in Big Data Hadoop by MD
 • 95,440 points • 340 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
 • 95,440 points • 900 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, 2020 in Big Data Hadoop by MD
 • 95,440 points • 2,869 views
0 votes
1 answer

How to create an empty file in Hadoop?

Hi@akhtar, You can create an empty file in ...READ MORE

Oct 13, 2020 in Big Data Hadoop by MD
 • 95,440 points • 12,535 views
0 votes
1 answer

How to remove the directory from HDFS?

Hi@akhtar, You can remove the directory using the ...READ MORE

Oct 13, 2020 in Big Data Hadoop by MD
 • 95,440 points • 3,772 views
0 votes
1 answer

org.apache.hadoop.mapreduce.lib.input.InvalidInputException: Input path does not exist: hdfs://localhost:54310/user/hduser/input.

Hi@akhtar, It seems you are providing the wrong ...READ MORE

Oct 13, 2020 in Big Data Hadoop by MD
 • 95,440 points • 2,231 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, 2020 in Big Data Hadoop by MD
 • 95,440 points • 1,982 views
0 votes
1 answer

How to check the name of the hadoop server?

Hi@akhtar, If you're running a pseudo-distributed setup, you ...READ MORE

Oct 13, 2020 in Big Data Hadoop by MD
 • 95,440 points • 1,982 views
0 votes
1 answer

I was installing Hadoop for windows everything went smoothly but when I tried to format NameNode it displayed an error of failing to start NameNode. What should I do?

Hi@alex, You may set the wrong IP in ...READ MORE

Oct 12, 2020 in Big Data Hadoop by MD
 • 95,440 points • 735 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
 • 95,440 points • 1,298 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
 • 95,440 points • 1,457 views
0 votes
1 answer

How to view contents of file in hadoop hdfs?

Hi@akhtar, You can use the Hadoop filesystem command ...READ MORE

Oct 5, 2020 in Big Data Hadoop by MD
 • 95,440 points • 7,554 views
0 votes
1 answer

How to find HDFS free space from command line?

Hi@akhtar, You can find the free space from ...READ MORE

Oct 5, 2020 in Big Data Hadoop by MD
 • 95,440 points • 565 views
0 votes
1 answer

Where does Hive store files in HDFS?

Hi@akhtar, It depends on what you set in ...READ MORE

Oct 5, 2020 in Big Data Hadoop by MD
 • 95,440 points • 721 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
 • 95,440 points • 1,518 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
 • 95,440 points • 2,031 views
0 votes
1 answer

Change the owner and group of a file in Hadoop.

Hi@akhtar, You can use the Chown command. This ...READ MORE

Oct 1, 2020 in Big Data Hadoop by MD
 • 95,440 points • 7,686 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
 • 95,440 points • 2,085 views
0 votes
1 answer

How to create a group in Hadoop?

Hi@akhtar, Generally, to create a group in the ...READ MORE

Oct 1, 2020 in Big Data Hadoop by MD
 • 95,440 points • 950 views
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