Trending questions in Big Data Hadoop

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Does HQL query go to all the nodes to process data?

InputSplits are created by logical division of ...READ MORE

Jul 26, 2019 in Big Data Hadoop by Tina
860 views
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2 answers

What is the difference between Oozie and Nifi ?

The main difference between Oozie and Nifi ...READ MORE

May 7, 2019 in Big Data Hadoop by Omkar
• 69,220 points
4,245 views
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1 answer

CSV integration with Hadoop

For integrating Hadoop with CSV, we can use ...READ MORE

Jul 16, 2019 in Big Data Hadoop by Krish
1,263 views
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1 answer

How to load data from flat files into different partitions of Hive table?

Hi, You can load data from flat files ...READ MORE

Jun 26, 2019 in Big Data Hadoop by Gitika
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2,082 views
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1 answer

Merging Files using PIG

In order to merge two or more ...READ MORE

Jul 4, 2019 in Big Data Hadoop by Tina
1,711 views
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1 answer

Classes implementing InputFormat frequently

FileInputFormat : Base class for all file-based InputFormats Other ...READ MORE

Jul 24, 2019 in Big Data Hadoop by Reshma
822 views
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1 answer

Syntax to mention that the data is enclosed in double quotes in pig

So, we will execute the below command, new_A_2 ...READ MORE

Jul 10, 2019 in Big Data Hadoop by Esha
1,409 views
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1 answer

Delimiter on the data

You can use this: import org.apache.spark.sql.functions.struct val df = ...READ MORE

Jul 25, 2019 in Big Data Hadoop by Vinay
751 views
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1 answer

Hive Query: Split value

You can use the SUBSTR() in hive ...READ MORE

Jul 25, 2019 in Big Data Hadoop by Paul
750 views
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1 answer

Pdf to csv file format conversions

You can convert the pdf files with ...READ MORE

Jul 9, 2019 in Big Data Hadoop by Esha
1,414 views
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1 answer

How to use Hbase shell in a bash script?

Hello, To write scripts with HBase shell it includes non-interactive mode, ...READ MORE

May 29, 2019 in Big Data Hadoop by Gitika
• 65,770 points
3,183 views
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1 answer

Query regarding ArrayBuffer

It's because that is the syntax. This ...READ MORE

Jul 26, 2019 in Big Data Hadoop by Rishi
684 views
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1 answer

Query regarding temporary File type conversion of parquet to text

Suppose I have the below parquet file ...READ MORE

Jul 9, 2019 in Big Data Hadoop by Janan
1,398 views
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3 answers

Hadoop Spark: How to iterate hdfs directories?

Using PySpark  hadoop = sc._jvm.org.apache.hadoop fs = hadoop.fs.FileSystem conf = ...READ MORE

Dec 5, 2018 in Big Data Hadoop by Kiran
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Produce compressed data from map reduce

 It is straight forward and you can achieve ...READ MORE

Jul 24, 2019 in Big Data Hadoop by John
728 views
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How to execute combiner and partitioning program without adding package name?

Yes, it is possible to do so ...READ MORE

Jul 16, 2019 in Big Data Hadoop by Raman
1,081 views
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1 answer

Getting error while using sqoop import.

You are trying to execute the sqoop ...READ MORE

Jul 5, 2019 in Big Data Hadoop by Reshma
1,543 views
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1 answer

Mention what are the main configuration parameters that user need to specify to run MapReduce Job?

Hi, The user of the MapReduce framework needs ...READ MORE

Jun 10, 2019 in Big Data Hadoop by Gitika
• 65,770 points
2,617 views
0 votes
1 answer

Hive: "SET LOCATION" command not changing the location of the database

The SET LOCATION command does not change ...READ MORE

May 20, 2019 in Big Data Hadoop by Yash
3,515 views
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1 answer

Can we use different input and output format classes?

Yes, InputFormatClass and OutputFormatClass are independent of ...READ MORE

Jul 22, 2019 in Big Data Hadoop by Jishan
790 views
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1 answer

Difference between root of hdfs and local machine

The command hdfs dfs -put command is used to ...READ MORE

Jun 19, 2019 in Big Data Hadoop by Mahi
2,209 views
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1 answer

How to solve error caused due to output types of mapper and reducer not matching?

job.setOutputValueClass will set the types expected as ...READ MORE

Jul 9, 2019 in Big Data Hadoop by Rishab
1,329 views
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1 answer

How can we ignore header line while loading data into Pig?

You can use the following code: A = ...READ MORE

Jul 22, 2019 in Big Data Hadoop by kiran
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1 answer

Explain to me the correct way to get a Hadoop FileSystem object so that I can use it for reading from HDFS as well as writing to HDFS.

FileSystem needs only one configuration key to successfully ...READ MORE

Jun 7, 2019 in Big Data Hadoop by ravikiran
• 4,620 points
2,703 views
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Sqoop exclude tables

How to exclude tables in sqoop if ...READ MORE

Jul 25, 2019 in Big Data Hadoop by Will
653 views
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1 answer

Hive Query to sort data

If you are trying to sort first ...READ MORE

Jul 14, 2019 in Big Data Hadoop by Tina
1,078 views
0 votes
1 answer

How do you start and stop region server in HBase?

Hey, You can run multiple region servers from ...READ MORE

May 23, 2019 in Big Data Hadoop by Gitika
• 65,770 points
3,302 views
0 votes
1 answer

How many partitions can do for one table?

Well, there are two kinds of partitions: 1. ...READ MORE

Jul 22, 2019 in Big Data Hadoop by Kunal
694 views
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1 answer

What are the modes of Hive metastore?

Hey, The metastore stores the schema and partition ...READ MORE

May 13, 2019 in Big Data Hadoop by Gitika
• 65,770 points
3,703 views
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1 answer

Datanode not running on Hadoop-2.7.3

Hey, I solved this problem by removing hadoop ...READ MORE

Jun 14, 2019 in Big Data Hadoop by Gitika
• 65,770 points
2,326 views
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1 answer

what is the difference between CREATE TABLE and CREATE EXTERNAL TABLE in Hive?

Hey, Although, we can create two types of ...READ MORE

Jun 26, 2019 in Big Data Hadoop by Gitika
• 65,770 points
1,771 views
0 votes
1 answer

Limit for Namenode Quantity

Each file Schema = 150bytes   Block schema ...READ MORE

Jul 25, 2019 in Big Data Hadoop by ravikiran
• 4,620 points
510 views
0 votes
1 answer

How to change the Hive table comment?

Yes, it is possible to change the ...READ MORE

May 20, 2019 in Big Data Hadoop by Tina
3,352 views
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1 answer

How does Hive job execution flow works?

Hey, Hive query is received from UI or ...READ MORE

May 13, 2019 in Big Data Hadoop by Gitika
• 65,770 points
3,637 views
0 votes
1 answer

How to Import the complete directory into HDFS?

First, need to create a directory in Hadoop: $ ...READ MORE

Jul 15, 2019 in Big Data Hadoop by Hiran
910 views
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2 answers

if HDFS threshold has been reached. What is the our approach to resolve this issue?

This was a fundamental issue in HDFS ...READ MORE

Jun 24, 2019 in Big Data Hadoop by Gitika
• 65,770 points
1,818 views
0 votes
1 answer

Hive queries from mapreduce gives Null Pointer Exception.

I think you have upgraded CDH. This ...READ MORE

Jun 4, 2019 in Big Data Hadoop by Rihan
2,659 views
0 votes
1 answer

How to execute python script in hadoop file system (hdfs)?

If you are simply looking to distribute ...READ MORE

Sep 19, 2018 in Big Data Hadoop by digger
• 26,740 points
13,796 views
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0 answers

pattern mapreduce

i need to write some mapreduce pattern ...READ MORE

Jul 23, 2019 in Big Data Hadoop by tiza
552 views
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1 answer

Creating a hive script and execute in the edureka cloudlab.

Please remove -f option from hive arguments and use hql extension ...READ MORE

Jul 14, 2019 in Big Data Hadoop by Karan
925 views
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2 answers

Error While Running Oozie Project

You need to add your current user ...READ MORE

Aug 6, 2019 in Big Data Hadoop by Dhimanshu
860 views
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1 answer

What is the use of ZooKeeper in Hbase?

Hey, The zookeeper is used to maintain the ...READ MORE

May 21, 2019 in Big Data Hadoop by Gitika
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3,217 views
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Integration of hbase

For HBase Pig integration, you can refer ...READ MORE

Jul 9, 2019 in Big Data Hadoop by Kiran
1,075 views
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How to increase reducers in Hive?

By default, only one reducer is assigned ...READ MORE

May 21, 2019 in Big Data Hadoop by Lohit
3,228 views
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1 answer
0 votes
1 answer

Mutliple Output Format in Hadoop

Each reducer uses an OutputFormat to write ...READ MORE

Jul 19, 2019 in Big Data Hadoop by ravikiran
• 4,620 points
613 views
0 votes
1 answer

Heartbeat time interval for Datanode

The heartbeat interval is 3 seconds by ...READ MORE

Jun 20, 2019 in Big Data Hadoop by Rajat
1,866 views
0 votes
1 answer

RDMBS integration with Hadoop

About integrating RDBMS with Hadoop, you can ...READ MORE

Jul 16, 2019 in Big Data Hadoop by Nanda
737 views
0 votes
1 answer

How to create Children or Sub-znode in zookeeper?

Hey, Creating children is similar to creating new ...READ MORE

May 28, 2019 in Big Data Hadoop by Gitika
• 65,770 points
2,868 views