Most voted questions in Big Data Hadoop

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Query regarding ArrayBuffer

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

Jul 26 in Big Data Hadoop by Rishi
21 views
0 votes
1 answer

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
30 views
0 votes
1 answer

Hive Query: Split value

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

Jul 25 in Big Data Hadoop by Paul
24 views
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0 answers

Sqoop exclude tables

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

Jul 25 in Big Data Hadoop by Will
24 views
0 votes
1 answer

Parquet & Avro File hadling with HIVE

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

Jul 25 in Big Data Hadoop by Tarun
44 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 in Big Data Hadoop by Vinay
22 views
0 votes
1 answer

Hive query: Join tables based on ID

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

Jul 25 in Big Data Hadoop by Tarun
20 views
0 votes
1 answer

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

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

Jul 25 in Big Data Hadoop by ravikiran
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430 views
0 votes
1 answer

Limit for Namenode Quantity

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

Jul 25 in Big Data Hadoop by ravikiran
• 4,560 points
14 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 in Big Data Hadoop by Tina
34 views
0 votes
1 answer

Classes implementing InputFormat frequently

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

Jul 24 in Big Data Hadoop by Reshma
16 views
0 votes
1 answer

Mapreduce: custom Input format

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

Jul 24 in Big Data Hadoop by Veer
29 views
0 votes
1 answer

Hive- unable to load data into table

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

Jul 24 in Big Data Hadoop by Firoz
31 views
0 votes
1 answer

Index LZO files

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

Jul 24 in Big Data Hadoop by Rishi
34 views
0 votes
1 answer

Produce compressed data from map reduce

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

Jul 24 in Big Data Hadoop by John
21 views
0 votes
1 answer

Running Mapreduce on compressed data

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

Jul 24 in Big Data Hadoop by Nanda
20 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 in Big Data Hadoop by Varun
16 views
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1 answer

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
• 4,560 points

edited Jul 25 by ravikiran 55 views
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pattern mapreduce

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

Jul 23 in Big Data Hadoop by tiza
40 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 in Big Data Hadoop by Lohit
106 views
0 votes
1 answer

HBase shell failed to connect

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

Jul 23 in Big Data Hadoop by Joshua
36 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 in Big Data Hadoop by Shri
65 views
0 votes
1 answer

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
33 views
0 votes
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
29 views
0 votes
1 answer

How to restart failed Namenode?

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

Jul 23 in Big Data Hadoop by Ishan
34 views
0 votes
1 answer

Name node RAM metadata

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

Jul 23 in Big Data Hadoop by Reshma
48 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 in Big Data Hadoop by kiran
17 views
0 votes
1 answer

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
• 4,560 points
104 views
0 votes
2 answers

Namenode is not getting started

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

Aug 5 in Big Data Hadoop by Namisha
46 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 in Big Data Hadoop by Kunal
26 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 in Big Data Hadoop by Jishan
28 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 in Big Data Hadoop by Kiran
40 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 in Big Data Hadoop by Madhu
24 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 in Big Data Hadoop by Reena
87 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
77 views
0 votes
1 answer

Mutliple Output Format in Hadoop

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

Jul 19 in Big Data Hadoop by ravikiran
• 4,560 points
29 views
0 votes
1 answer

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
• 4,560 points
37 views
0 votes
1 answer

Sqoop export not working

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

Jul 16 in Big Data Hadoop by Tina
91 views
0 votes
1 answer

Spark Vs Hive LLAP Question

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

Jul 16 in Big Data Hadoop by Karan
444 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 in Big Data Hadoop by Firoz
41 views
0 votes
1 answer

CSV integration with Hadoop

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

Jul 16 in Big Data Hadoop by Krish
31 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
35 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 in Big Data Hadoop by Raman
31 views
0 votes
1 answer

Output Splitting problem in Hadoop

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

Jul 16 in Big Data Hadoop by Sayni
27 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 in Big Data Hadoop by Raj
488 views
0 votes
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
306 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 in Big Data Hadoop by ravikiran
• 4,560 points
71 views
0 votes
1 answer

Pig script not dumping the data correctly

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

Jul 15 in Big Data Hadoop by George
20 views
0 votes
2 answers

Error in running hdfs commands

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

Aug 5 in Big Data Hadoop by Rashi
24 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 in Big Data Hadoop by Hiran
15 views