Most voted questions in Big Data Hadoop

0 votes
1 answer

Junit test for Map Reduce Hadoop

Hi. This is the code I used ...READ MORE

Dec 17, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 2,412 views
0 votes
1 answer

Hadoop mapreduce java: NullPoint Exception

Try this: String cords = it.next().toString(); lattitude = Double.toString((inst.decode(cords))[0]); longitude ...READ MORE

Dec 14, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 592 views
0 votes
1 answer

How to open MySql console in Ubuntu?

sudo service mysqld restart mysql -u <username> root ...READ MORE

Dec 14, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 2,285 views
0 votes
1 answer

How to export file from sqoop to sql table?

For SQOOP export please try below command: bin/sqoop ...READ MORE

Dec 14, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 837 views
0 votes
1 answer

How to use sqoop import?

Here is an example of import command. ...READ MORE

Dec 14, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 614 views
0 votes
1 answer

Not able to insert in hive partition table

You have to add the partition before ...READ MORE

Dec 14, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 2,946 views
0 votes
1 answer

Not able to insert data into hive table

Seems like a hive version problem.​ insert operation is ...READ MORE

Dec 14, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 2,661 views
0 votes
1 answer

Using HBase jar files. Where to download and set classpath

There are many sites you can get ...READ MORE

Dec 14, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 2,740 views
0 votes
1 answer

Getting some warning/error while loading java file using Hbase commands

In your code, you have set some ...READ MORE

Dec 14, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 584 views
0 votes
1 answer

How to create external Hive table?

It's simple. You just have to add external ...READ MORE

Dec 14, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 666 views
0 votes
1 answer

How to create a managed table in Hive?

You can use this command: create table employee(Name ...READ MORE

Dec 14, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 5,128 views
0 votes
1 answer

What are the different relational operations in “Pig Latin” you worked with?

Different relational operators are: for each order by fil ...READ MORE

Dec 14, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 617 views
0 votes
1 answer

Can you build “Spark” with any particular Hadoop version?

Yes, one can build “Spark” for a specific ...READ MORE

Dec 14, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 1,100 views
0 votes
1 answer

Why does one remove or add nodes in a Hadoop cluster frequently?

One of the most attractive features of ...READ MORE

Dec 14, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 1,987 views
0 votes
1 answer

What are active and passive “NameNodes” in Hadoop?

In HA (High Availability) architecture, we have ...READ MORE

Dec 14, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 2,710 views
0 votes
1 answer

Managed Table vs External Table

External table is created for external use ...READ MORE

Dec 14, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 12,511 views
0 votes
1 answer

Hadoop Hive Bucketing

Partition helps in increasing the efficiency when ...READ MORE

Dec 14, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 490 views
0 votes
1 answer

Hadoop Hive partitioning

Partitioning: Hive has been one of the preferred ...READ MORE

Dec 14, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 964 views
0 votes
1 answer

How do I join 2 tables in PIG using 2 fields?

Here, we have two tables: Tab1 having columns ...READ MORE

Dec 13, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 1,983 views
0 votes
1 answer

Not able to list sqoop jobs

It seems like you are missing a ...READ MORE

Dec 13, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 914 views
0 votes
1 answer

Hadoop Hive query to filter employees

select * from tablename where DOJ> '2018-01-01' ...READ MORE

Dec 13, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 3,330 views
0 votes
1 answer

How to connect impala to cloud lab?

impala-shell -i <domain_name>: <port > READ MORE

Dec 13, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 898 views
0 votes
1 answer

Hadoop PIG extraction shows no output

To see whether the extraction was done ...READ MORE

Dec 13, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 457 views
0 votes
1 answer

What is the difference between Map-side join and Reduce-side join?

Join is a clause that combines the records ...READ MORE

Dec 13, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 5,034 views
0 votes
1 answer

Which side join is taken by default by hive? Map-side or Reduce-side?

The syntax for Map-side join and Reduce-side ...READ MORE

Dec 13, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 954 views
0 votes
1 answer

Can not list/access files of local system from hadoop

You can not directory use files from ...READ MORE

Dec 13, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 570 views
0 votes
1 answer

How to unzip a zipped file stored in Hadoop hdfs?

hadoop fs -text /hdfs-path-to-zipped-file.gz | hadoop fs ...READ MORE

Dec 12, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 11,890 views
0 votes
1 answer

How to run Java file in Hadoop?

Try this: hadoop fs -cat hdfs:///user/hadoop/values.txt READ MORE

Dec 12, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 3,413 views
0 votes
1 answer

How to read Spark elements having multiple lines each?

Try this: val new_records = sc.newAPIHadoopRDD(hadoopConf,classOf[ ...READ MORE

Dec 12, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 1,179 views
0 votes
1 answer

Hadoop: java.lang.IllegalArgumentException: Wrong FS: expected: file:///

Try this: Configuration configuration = new Configuration(); FileSystem fs ...READ MORE

Dec 12, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 7,342 views
0 votes
1 answer

How do I install cloudera Hadoop without internet connection?

You can do that by selecting the ...READ MORE

Dec 12, 2018 in Big Data Hadoop by Neha
 • 6,300 points • 1,391 views
0 votes
1 answer

What is the difference between Hadoop API and Streaming?

Usually we have Map/Reduce pair written in ...READ MORE

Dec 12, 2018 in Big Data Hadoop by Neha
 • 6,300 points • 696 views
0 votes
0 answers

Number of tasks submitted and executed within the day in hadoop

Tasks Write a software application, service, daemon or ...READ MORE

Dec 12, 2018 in Big Data Hadoop by Irfan
 • 120 points • 541 views
0 votes
1 answer

Hadoop Hive: ClassNotFoundException: org.apache.hive.jdbc.HiveDriver

You have to use the right dependency <dependency> ...READ MORE

Dec 11, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 5,483 views
0 votes
1 answer

How to copy files in hdfs with wildcards?

You can use the hdfs command: hdfs fs ...READ MORE

Dec 11, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 2,246 views
0 votes
1 answer

How to read more than one files in Apache Spark?

Try this: val text = sc.wholeTextFiles("student/*") text.collect() ...READ MORE

Dec 11, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 2,384 views
0 votes
1 answer

Not able to start jobtracker in hadoop

There is no jobtracker in hadoop 2.2.0 YARN framework. ...READ MORE

Dec 11, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 1,146 views
0 votes
1 answer

What is local file System?

LocalFS means it may be your LinuxFS ...READ MORE

Dec 11, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 1,137 views
0 votes
1 answer

I want to install snappy on Hadoop 1.2.1. How do I do that?

As per Cloudera, if you install hadoop ...READ MORE

Dec 11, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 826 views
0 votes
1 answer

Do worker hosts need access to the Cloudera public repositories for an install with Cloudera Manager?

You can perform an installation or upgrade ...READ MORE

Dec 7, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 533 views
0 votes
1 answer

Does Cloudera Manager Support an API?

Yes. A comprehensive set of APIs for ...READ MORE

Dec 7, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 380 views
0 votes
1 answer

What is distributed Cache in MapReduce Framework ?

Distributed Cache is an important feature provided ...READ MORE

Dec 7, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 1,378 views
0 votes
1 answer

Which is helpful SVN or Git for Hadoop Development?

The official location for Hadoop is the ...READ MORE

Dec 7, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 922 views
0 votes
1 answer

How to create new directory in hdfs using java code?

Try this: { Configuration config ...READ MORE

Dec 6, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 3,483 views
0 votes
1 answer

Not able to install hadoop using maven

First make sure you have ant installed ...READ MORE

Dec 6, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 1,258 views
0 votes
1 answer

How to use jar file without putting it in hdfs?

If by "using", you mean distributing it, ...READ MORE

Dec 6, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 551 views
0 votes
1 answer

How to concatenate hdfs files and store in output file?

You can use a combination of cat and put command. Something ...READ MORE

Dec 6, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 3,566 views
0 votes
1 answer

Start-dfs.sh daemons not starting. localhost: mkdir: cannot create directory `/user': Permission denied

Make the following changes to the hadoop-env.sh ...READ MORE

Dec 6, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 2,756 views
0 votes
1 answer

Hadoop sqoop import not working. Error: ERROR manager.SqlManager: Error reading from database

In the command, try mentioning the driver ...READ MORE

Dec 5, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 1,885 views
0 votes
1 answer

Not able to create Hive table from HDFS file

You dont have to specify the file name ...READ MORE

Dec 5, 2018 in Big Data Hadoop by Omkar
 • 69,210 points • 2,295 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.