Latest questions in Big Data Hadoop

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1 answer

Parquet & Avro File hadling with HIVE

For avro you can follow the format ...READ MORE

Jul 25, 2019 in Big Data Hadoop by Tarun
 • 2,325 views
0 votes
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
 • 344 views
0 votes
1 answer

Hive query: Join tables based on ID

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

Jul 25, 2019 in Big Data Hadoop by Tarun
 • 708 views
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1 answer

How can I append data to an existing file in HDFS?

You have to do some configurations as ...READ MORE

Jul 25, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 8,072 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 • 340 views
0 votes
1 answer

Current Date in Hive

Try this instead: select from_unixtime(unix_timestamp()); If you have an ...READ MORE

Jul 25, 2019 in Big Data Hadoop by Tina
 • 2,473 views
0 votes
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
 • 409 views
0 votes
1 answer

Mapreduce: custom Input format

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

Jul 24, 2019 in Big Data Hadoop by Veer
 • 877 views
0 votes
1 answer

Hive- unable to load data into table

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

Jul 24, 2019 in Big Data Hadoop by Firoz
 • 1,149 views
0 votes
1 answer

Index LZO files

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

Jul 24, 2019 in Big Data Hadoop by Rishi
 • 608 views
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1 answer

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
 • 367 views
0 votes
1 answer

Running Mapreduce on compressed data

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

Jul 24, 2019 in Big Data Hadoop by Nanda
 • 654 views
0 votes
1 answer

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, 2019 in Big Data Hadoop by Varun
 • 1,228 views
+1 vote
1 answer

Which programming language is most preferable for working Hadoop? Java and Python? and which one is most easy to learn?

Hi, To start with Hadoop I would suggest ...READ MORE

Jul 24, 2019 in Big Data Hadoop by Nitu
 • 3,026 views
0 votes
1 answer

How to download Large Hadoop[]closed] Data?

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

Jul 23, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points
edited Jul 25, 2019 by ravikiran • 949 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
 • 372 views
0 votes
1 answer

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, 2019 in Big Data Hadoop by Lohit
 • 2,944 views
0 votes
1 answer

HBase shell failed to connect

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

Jul 23, 2019 in Big Data Hadoop by Joshua
 • 1,496 views
0 votes
1 answer

Unable to run Sqoop scirpt to copy data to Cassandra

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

Jul 23, 2019 in Big Data Hadoop by Shri
 • 997 views
0 votes
2 answers

Not Able to read the file from hdfs location

Please make sure you connect to spark2-shell ...READ MORE

Jul 14, 2020 in Big Data Hadoop by Shantanu
 • 190 points • 1,786 views
0 votes
1 answer

How to import data to hbase database?

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

Jul 23, 2019 in Big Data Hadoop by Kiran
 • 2,410 views
0 votes
1 answer

How to restart failed Namenode?

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

Jul 23, 2019 in Big Data Hadoop by Ishan
 • 2,674 views
0 votes
1 answer

Name node RAM metadata

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

Jul 23, 2019 in Big Data Hadoop by Reshma
 • 1,324 views
0 votes
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
 • 517 views
0 votes
1 answer

How to Sqoop in a Java Program?

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

Jul 22, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 1,301 views
0 votes
2 answers

Namenode is not getting started

Hi, You can do one thing, first delete all ...READ MORE

Aug 5, 2019 in Big Data Hadoop by Namisha
 • 759 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
 • 526 views
0 votes
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
 • 467 views
0 votes
1 answer

Why do we use job.waitForCompletion(true) ?

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

Jul 22, 2019 in Big Data Hadoop by Kiran
 • 924 views
0 votes
1 answer

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, 2019 in Big Data Hadoop by Madhu
 • 912 views
0 votes
1 answer

Output types of mapper and reducer does not match

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

Jul 22, 2019 in Big Data Hadoop by Reena
 • 2,431 views
0 votes
1 answer

Not a host:port pair: PBUF?

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

Jul 22, 2019 in Big Data Hadoop by Esha
 • 1,014 views
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 • 441 views
0 votes
1 answer

How to fix corrupt files on HDFS

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

Jul 18, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 923 views
0 votes
1 answer

Sqoop export not working

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

Jul 16, 2019 in Big Data Hadoop by Tina
 • 2,432 views
0 votes
1 answer

Spark Vs Hive LLAP Question

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

Jul 16, 2019 in Big Data Hadoop by Karan
 • 3,397 views
0 votes
1 answer

Pig: Difference between inner bag and outer bag

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

Jul 16, 2019 in Big Data Hadoop by Firoz
 • 2,145 views
0 votes
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
 • 785 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
 • 478 views
0 votes
1 answer

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
 • 751 views
0 votes
1 answer

Output Splitting problem in Hadoop

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

Jul 16, 2019 in Big Data Hadoop by Sayni
 • 870 views
0 votes
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, 2019 in Big Data Hadoop by Raj
 • 10,859 views
0 votes
1 answer

How does data gets split in Sqoop?

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

Jul 16, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 8,555 views
0 votes
1 answer

how to store images and videos on to HDFS?

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

Jul 16, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 2,585 views
0 votes
1 answer

Pig script not dumping the data correctly

The first column is denoted by $0, ...READ MORE

Jul 15, 2019 in Big Data Hadoop by George
 • 990 views
0 votes
2 answers

Error in running hdfs commands

Hey, You can check this command also  hadoop fs ...READ MORE

Aug 5, 2019 in Big Data Hadoop by Rashi
 • 1,249 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
 • 538 views
0 votes
1 answer

Which one is better MR or Spark?

The above difference clearly points out that ...READ MORE

Jul 15, 2019 in Big Data Hadoop by Daniel
 • 1,578 views
0 votes
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, 2019 in Big Data Hadoop by Krish
 • 2,720 views
0 votes
1 answer

Load data into teradata using sqoop

The general syntax to do this as ...READ MORE

Jul 15, 2019 in Big Data Hadoop by Ritu
 • 1,828 views
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