Most voted questions in Big Data Hadoop

0 votes
1 answer

Cant access file from Hive. permission denied

There are two possible reasons for this: Wrong ...READ MORE

Dec 31, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 1,823 views
0 votes
1 answer

Transfer data between 2 Tables having issues with Date conversion from string to Date datatype.

This can be solved making use of ...READ MORE

Dec 28, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 410 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 • 5,573 views
0 votes
1 answer

Cant connec to zookeeper: KeeperErrorCode = ConnectionLoss for HBase

Mostly HMaster is not running. Enter the ...READ MORE

Dec 28, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 6,259 views
0 votes
1 answer

Hadoop plugin (1.0.3) for eclipse

When you have Hadoop Eclipse plugin installed ...READ MORE

Dec 28, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 962 views
0 votes
1 answer

How to connect hive to tableau?

We Can not connect hive to tableau ...READ MORE

Dec 28, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 1,373 views
0 votes
1 answer

How to set input split settings?

It can be controlled by setting the ...READ MORE

Dec 27, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 2,191 views
0 votes
1 answer

Hadoop regarding input split

Hadoop framework divides a large file into ...READ MORE

Dec 27, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 428 views
0 votes
1 answer

Processing image in hdfs

If your block size is 64 MB, ...READ MORE

Dec 27, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 915 views
0 votes
1 answer

Mapreduce shuffle and sort

The mapreduce task happens in the following ...READ MORE

Dec 27, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 487 views
0 votes
1 answer

Not able to start MySql service

Hello. "The system never lies :-P".  The service ...READ MORE

Dec 26, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 1,049 views
0 votes
1 answer

MySql connection localhost vs 127.0.0.1

The difference is that when you use localhost, ...READ MORE

Dec 26, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 4,096 views
0 votes
1 answer

"Cant connect to local mysql server through socket "var/lib/mysql/mysql.sock" .

Seems like mysql.sock does not exist in the ...READ MORE

Dec 26, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 1,387 views
0 votes
1 answer

MySql connection problem "Cant connect to local mysql server through socket "var/lib/mysql/mysql.sock" .

First start the mysql server: service mysqld start To ...READ MORE

Dec 26, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 889 views
0 votes
1 answer

Hbase installation Issue. Cant start HRegionServer and HQuorumPeer

It seems hbase did not start properly ...READ MORE

Dec 26, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 1,765 views
0 votes
0 answers

wordcount example not running on edureka vm

Hi, wordcount example failing on edureka vm(VM is ...READ MORE

Dec 25, 2018 in Big Data Hadoop by PRASAD
 • 120 points • 658 views
0 votes
1 answer

How to provide encryption for Cloudera HDFS?

You can provide security to cloudera hdfs by using HDFS ...READ MORE

Dec 21, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 380 views
0 votes
1 answer

All daemons starting except datanode

There could be more than one reason ...READ MORE

Dec 21, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 593 views
0 votes
1 answer

How are blocks created while written file in hdfs?

Suppose we want to write a 1 ...READ MORE

Dec 21, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 1,126 views
0 votes
1 answer

How is a file written in hdfs?

When you copy a file from the ...READ MORE

Dec 21, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 789 views
0 votes
1 answer

What is the use of fsimage in hadoop?

The NameNode stores modifications to the file ...READ MORE

Dec 21, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 24,094 views
0 votes
1 answer

What does a secondary namenode do in Hadoop?

The Secondary namenode is mainly used as a ...READ MORE

Dec 21, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 2,478 views
0 votes
1 answer

Running into an issue while running the mapred job on the server

Try this command hadoop dfs -put /var/tmp/students.txt / hadoop ...READ MORE

Dec 20, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 365 views
0 votes
1 answer

Cant access the Hadoop Namenode from browser

As mentioned in the error, the nodes ...READ MORE

Dec 20, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 1,547 views
0 votes
1 answer

Datanode not running and not able start

Please type the below command in the ...READ MORE

Dec 20, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 713 views
0 votes
1 answer

Not able to start/stop hadoop daemons

If you were able to start the ...READ MORE

Dec 20, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 1,557 views
0 votes
1 answer

How will you decide whether you need to use the Capacity Scheduler or the Fair Scheduler?

Fair Scheduling is the process in which ...READ MORE

Dec 20, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 2,684 views
0 votes
1 answer

What is Metastore in Hive?

It stores metadata for Hive tables (like their schema ...READ MORE

Dec 20, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 2,887 views
0 votes
1 answer

If there are two joins in hive, how many mapreduce jobs will run?

There are two conditions for no. of ...READ MORE

Dec 19, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 6,652 views
0 votes
1 answer

Hadoop MapReduce wordcount "type job is not applicable for the arguments" error

The combiner class is not required in ...READ MORE

Dec 19, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 668 views
0 votes
1 answer

How to execute wordcount in Hadoop?

Follow these steps: Step 1:  Import all these hadoop ...READ MORE

Dec 19, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 975 views
0 votes
1 answer

Apache Spark vs MapReduce

Both Spark and Hadoop MapReduce are used ...READ MORE

Dec 19, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 548 views
0 votes
1 answer

What is the difference between MapReduce and YARN in Hadoop?

MapReduce: MapReduce is an algorithm used to store ...READ MORE

Dec 19, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 5,094 views
0 votes
1 answer

Why is HDFS used for the applications with large data sets, and not for the multiple small files?

HDFS is more efficient for a large ...READ MORE

Dec 19, 2018 in Big Data Hadoop by Neha
 • 6,300 points • 4,836 views
0 votes
1 answer

Can DataNode and NameNode be commodity hardware?

DataNodes are the commodity hardware only as ...READ MORE

Dec 19, 2018 in Big Data Hadoop by Neha
 • 6,300 points • 2,610 views
0 votes
1 answer

MapReduce "cannot be resolved to a type" error

One of the reasons could be different ...READ MORE

Dec 18, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 1,424 views
0 votes
1 answer

Sqoop import not working

The error you are getting is because ...READ MORE

Dec 18, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 802 views
0 votes
1 answer

How to implement sqoop jobs?

Step 1: Give the below command to ...READ MORE

Dec 18, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 404 views
0 votes
1 answer

Sqoop data transfer with SSL or SFtp

Sqoop supports SSL/TLS data transfer with the ...READ MORE

Dec 18, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 1,376 views
0 votes
1 answer

How to securely transfer data from rdms to hdfs using sqoop?

Sqoop stores metadata in a repository and ...READ MORE

Dec 18, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 1,191 views
0 votes
1 answer

Executing mapper and reducer individually

This is what happens: Map reduce framework will ...READ MORE

Dec 18, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 557 views
0 votes
1 answer

Hadoop Data node acknowledgement

Let's understand full write mechanism so that ...READ MORE

Dec 18, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 654 views
0 votes
1 answer

How to change file format using Sqoop?

For change in the file format, you ...READ MORE

Dec 18, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 1,740 views
0 votes
3 answers

How to change the delimiter in Sqoop?

--fields-terminated-by <char> READ MORE

Jun 25, 2019 in Big Data Hadoop by anonymous
 • 10,051 views
0 votes
1 answer

How to create a Hive table from sequence file stored in HDFS?

There are two SerDe for SequenceFile as ...READ MORE

Dec 18, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 4,564 views
0 votes
1 answer

How to create a Hive table with a sequence file?

In Hive we can create a sequence ...READ MORE

Dec 17, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 3,330 views
0 votes
1 answer

Command to partition table in Hive

Yes, You need to mention the below ...READ MORE

Dec 17, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 749 views
0 votes
1 answer

Sqoop import gives error: org.apache.hadoop.security.AccessControlException: Permission denied

Seems like you are not passing the ...READ MORE

Dec 17, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 1,804 views
0 votes
1 answer

What are the different types of tombstone markers in HBase for deletion?

1)Family Delete Marker- This markers marks all ...READ MORE

Dec 17, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 2,230 views
0 votes
1 answer

How to check Cloudera Manager Service status?

There surely is a command to check ...READ MORE

Dec 17, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 2,805 views
Page:

Most popular tags

"PMP®","PMI®", "PMI-ACP®" and "PMBOK®" are registered marks of the Project Management Institute, Inc. MongoDB®, Mongo and the leaf logo are the registered trademarks of MongoDB, Inc.