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
670 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
1,919 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
718 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
777 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
659 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
2,364 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
1,115 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
1,215 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
2,971 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
1,262 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
1,135 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
570 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
1,653 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
11,480 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
1,003 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
731 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
577 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
715 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
• 38,240 points
470 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
945 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
1,951 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
2,727 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
1,979 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
11,020 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
1,489 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
• 38,240 points

edited Oct 16, 2020 by akhtar 715 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
581 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
669 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
1,582 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
561 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
876 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
362 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
956 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
2,986 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
12,810 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
3,963 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
2,323 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
2,059 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
2,095 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
1,560 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
7,722 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
610 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
792 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
1,579 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
2,130 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
7,834 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
2,173 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
1,006 views