Trending questions in Big Data Hadoop

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How to find in incorrect file/records in hive?

A value with a wrong datatype causes ...READ MORE

Jul 25 in Big Data Hadoop by Ritu
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Hive Query: Split value

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

Jul 25 in Big Data Hadoop by Paul
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Delimiter on the data

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

Jul 25 in Big Data Hadoop by Vinay
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Hive query: Join tables based on ID

After creating the tables a1 and b1 ...READ MORE

Jul 25 in Big Data Hadoop by Tarun
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Limit for Namenode Quantity

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

Jul 25 in Big Data Hadoop by ravikiran
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13 views
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Index LZO files

You can do it using the following ...READ MORE

Jul 24 in Big Data Hadoop by Rishi
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Hive- unable to load data into table

The command you are typing is incorrect. ...READ MORE

Jul 24 in Big Data Hadoop by Firoz
25 views
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Mapreduce: custom Input format

Here's a list of Input Formats: CombineFileInputFormat CombineSe ...READ MORE

Jul 24 in Big Data Hadoop by Veer
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How can we retrieve/get complete HQL hive query from hive,spark and tez?

To get full query running for the ...READ MORE

Jul 23 in Big Data Hadoop by Lohit
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Produce compressed data from map reduce

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

Jul 24 in Big Data Hadoop by John
19 views
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Running Mapreduce on compressed data

It is very straight forward, no need ...READ MORE

Jul 24 in Big Data Hadoop by Nanda
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Sqoop exclude tables

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

Jul 25 in Big Data Hadoop by Will
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Classes implementing InputFormat frequently

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

Jul 24 in Big Data Hadoop by Reshma
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How to Compress Map output?

With MR2, now we should set conf.set("mapreduce.map.output.compress", true)  conf.set("mapreduce.output.fileoutputformat.compress", ...READ MORE

Jul 24 in Big Data Hadoop by Varun
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How to download Large Hadoop[]closed] Data?

I would prefer you to download million songs ...READ MORE

Jul 23 in Big Data Hadoop by ravikiran
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edited Jul 25 by ravikiran 51 views
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How to Sqoop in a Java Program?

You can use the following sample code for ...READ MORE

Jul 22 in Big Data Hadoop by ravikiran
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88 views
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Unable to run Sqoop scirpt to copy data to Cassandra

Unfortunately, this can't be achieved with open ...READ MORE

Jul 23 in Big Data Hadoop by Shri
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Name node RAM metadata

For the above requirement, the memory consumption ...READ MORE

Jul 23 in Big Data Hadoop by Reshma
43 views
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How to restart failed Namenode?

You need to solve the issue which ...READ MORE

Jul 23 in Big Data Hadoop by Ishan
31 views
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1 answer

Spark Vs Hive LLAP Question

While Apache Hive and Spark SQL perform ...READ MORE

Jul 16 in Big Data Hadoop by Karan
331 views
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1 answer

HBase shell failed to connect

Enter the below command in the terminal ...READ MORE

Jul 23 in Big Data Hadoop by Joshua
26 views
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Not Able to read the file from hdfs location

You have to mention the hdfs path, ...READ MORE

Jul 23 in Big Data Hadoop by Esha
25 views
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1 answer

How to import data to hbase database?

First you have to have the file ...READ MORE

Jul 23 in Big Data Hadoop by Kiran
25 views
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Output types of mapper and reducer does not match

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

Jul 22 in Big Data Hadoop by Reena
51 views
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pattern mapreduce

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

Jul 23 in Big Data Hadoop by tiza
38 views
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1 answer

Import JSON file into hive

There are two ways to load json ...READ MORE

Jul 15 in Big Data Hadoop by Guru
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Why do we use job.waitForCompletion(true) ?

The main reason for job.waitForCompletion exists is that ...READ MORE

Jul 22 in Big Data Hadoop by Kiran
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How many partitions can do for one table?

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

Jul 22 in Big Data Hadoop by Kunal
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Can we use different input and output format classes?

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

Jul 22 in Big Data Hadoop by Jishan
22 views
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Mapreduce: What is the use of setting the name of the job?

Job job = new Job(conf,"job_name"), is just ...READ MORE

Jul 22 in Big Data Hadoop by Madhu
21 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 in Big Data Hadoop by kiran
13 views
0 votes
1 answer

Not a host:port pair: PBUF?

Hey. This error usually occurs when the ...READ MORE

Jul 22 in Big Data Hadoop by Esha
69 views
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1 answer

Copy file from local to hdfs from the spark job in yarn mode

Please refer to the below code: import org.apache.hadoop.conf.Configuration import ...READ MORE

Jul 16 in Big Data Hadoop by Raj
272 views
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How to remove duplicate records from Hive table?

A record is duplicate if there are ...READ MORE

Jul 11 in Big Data Hadoop by Bhuvan
465 views
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Hive: ParseException line 5:20 missing EOF at '.' near

In the stored as parameter, you have specified the ...READ MORE

Jul 11 in Big Data Hadoop by Kim
461 views
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1 answer

How does data gets split in Sqoop?

I will drop the answer in the ...READ MORE

Jul 16 in Big Data Hadoop by ravikiran
• 4,560 points
236 views
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Mutliple Output Format in Hadoop

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

Jul 19 in Big Data Hadoop by ravikiran
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26 views
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2 answers

What is the relationship between Hadoop and Database?

Hadoop software framework work is very well ...READ MORE

Aug 6 in Big Data Hadoop by Dinesh
98 views
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How to fix corrupt files on HDFS

1 - Spark if following slave/master architecture. So ...READ MORE

Jul 18 in Big Data Hadoop by ravikiran
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31 views
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2 answers

E0901: Namenode [localhost:8020] not allowed, not in Oozies whitelist

You can add this below property in oozie-site.xml: <property> <name>oozie.service.HadoopAccessorService.jobTracker.whitelist</name> <value>myaddress:8020</value> </property> Hope ...READ MORE

Aug 6 in Big Data Hadoop by Shiva
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2 answers

What is ElasticSearch Hadoop?

it as a connector that allows data to flow bi-directionaly so ...READ MORE

Aug 6 in Big Data Hadoop by Dinish
53 views
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Sqoop export not working

The issue that you might be getting ...READ MORE

Jul 16 in Big Data Hadoop by Tina
62 views
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how to store images and videos on to HDFS?

HDFS is capable to accept data in ...READ MORE

Jul 16 in Big Data Hadoop by ravikiran
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40 views
0 votes
1 answer

RDMBS integration with Hadoop

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

Jul 16 in Big Data Hadoop by Nanda
30 views
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Pig: Difference between inner bag and outer bag

Outer Bag: An outer bag is nothing but ...READ MORE

Jul 16 in Big Data Hadoop by Firoz
29 views
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CSV integration with Hadoop

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

Jul 16 in Big Data Hadoop by Krish
25 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 in Big Data Hadoop by Raman
25 views
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Output Splitting problem in Hadoop

When you are loading two different files, ...READ MORE

Jul 16 in Big Data Hadoop by Sayni
20 views
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1 answer

Sqoop: Dsqoop.export.records.per.statement option

Dsqoop.export.records.per.statement=1 is as the name suggests how many ...READ MORE

Jul 15 in Big Data Hadoop by Krish
62 views
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2 answers

Explain to me the difference between Name Node and Secondary Name Node

Secondary namenode is just a helper for ...READ MORE

Aug 6 in Big Data Hadoop by Dhiman
56 views