Latest questions in Big Data Hadoop

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Google Hadoop Filesystem Encryption

If you're asking if customer-supplied encryption keys ...READ MORE

Oct 18, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 531 views
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1 answer

Is Java alone Sufficient for Hadoop?

In my day job, I've just spent ...READ MORE

Oct 18, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 460 views
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1 answer

What is -cp command in hadoop? How it works?

/user/cloudera/data1 is not a directory, it is ...READ MORE

Oct 17, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 3,884 views
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1 answer

What is a data serialization system?

So when Hadoop was being written by ...READ MORE

Oct 17, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 1,060 views
0 votes
1 answer

What is the best way to integrate SAS with Hadoop without losing the parallel processing capacity of Hadoop

One of the major pushes at SAS ...READ MORE

Oct 16, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 1,996 views
0 votes
1 answer

How to configure Yarn from command line?

It's a bit non-intuitive, but it turns ...READ MORE

Oct 16, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 1,683 views
0 votes
1 answer

Does Hadoop and Spark support iPv6 now?

It does not. As of today HADOOP-11890, which ...READ MORE

Oct 15, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 1,786 views
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1 answer

Hadoop Cluster Node Setup.

Yes, at least in small clusters those ...READ MORE

Oct 15, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 460 views
+1 vote
1 answer

How to count number of rows in alias in PIG?

COUNT is part of pig LOGS= LOAD 'log'; LOGS_GROUP= ...READ MORE

Oct 15, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 2,467 views
+4 votes
3 answers

Unable to find file error- while Streaming Hadoop

Is python installed running on the slaves that ...READ MORE

Oct 16, 2018 in Big Data Hadoop by Vinith
 • 3,806 views
0 votes
1 answer

What are the prerequisites to learn Hadoop in java perspective?

In my day job, I've just spent ...READ MORE

Oct 11, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 631 views
0 votes
1 answer

POC for Hadoop in real time scenario

I'd like to point a few things. If ...READ MORE

Oct 11, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 1,476 views
0 votes
1 answer

PIG - Found interface org.apache.hadoop.mapreduce.JobContext, but class was expected

Yes, it is a compatibility issue. in Hadoop ...READ MORE

Oct 10, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 945 views
0 votes
1 answer

Setting textinputformat.record.delimiter in spark

I got this working with plain uncompressed ...READ MORE

Oct 10, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 2,189 views
0 votes
1 answer

Is it possible to integrate Kdb+ and hadoop?

kdb is a column oriented database plus ...READ MORE

Oct 10, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 798 views
0 votes
1 answer

Is MapR a substitute for MapReduce?

MapR is a commercial distribution of Apache ...READ MORE

Oct 10, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 1,008 views
0 votes
1 answer

Is it possible to start a zookeeper server instance in process?

To start ZooKeeper you have to execute ZooKeeperServerMain class. You can use ...READ MORE

Oct 9, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 527 views
0 votes
1 answer

How to Access Hive via Python?

The easiest way is to use PyHive. To ...READ MORE

Oct 9, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 16,613 views
0 votes
2 answers

Sqoop: Could not load mysql driver exception.

I add mysql driver for sqoop and it ...READ MORE

Mar 1, 2020 in Big Data Hadoop by Manh Quang
 • 180 points • 3,377 views
0 votes
1 answer

Hadoop on OSX “Unable to load realm info from SCDynamicStore”

Add the following to your hadoop-env.sh file: export ...READ MORE

Oct 8, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 537 views
0 votes
1 answer

How can I calculate exact median with Apache Spark?

You need to sort RDD and take ...READ MORE

Oct 8, 2018 in Big Data Hadoop by Omkar
 • 69,230 points • 4,126 views
+3 votes
1 answer

Getting Connection Error while loading data into table using cloudera hive

Hey Nafeesa, Itseems that Hive is not able ...READ MORE

Oct 4, 2018 in Big Data Hadoop by Vardhan
 • 13,190 points • 745 views
+2 votes
2 answers

Create HIVE Table with multi character delimiter

FILELDS TERMINATED BY does not support multi-character delimiters. ...READ MORE

Oct 3, 2018 in Big Data Hadoop by slayer
 • 29,350 points • 14,030 views
0 votes
1 answer

How can I access S3/S3n from a local Hadoop 2.6 installation?

For some reason, the jar hadoop-aws-[version].jar which contains the ...READ MORE

Oct 3, 2018 in Big Data Hadoop by digger
 • 26,740 points • 5,150 views
0 votes
1 answer

What is Hadoop Speculative task execution?

One problem with the Hadoop system is ...READ MORE

Oct 3, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 901 views
0 votes
1 answer

What is the difference between Writable & WritableComparable in Hadoop?

Writable in an interface in Hadoop and types ...READ MORE

Oct 3, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 7,459 views
0 votes
1 answer

out of Memory Error in Hadoop

You can assign more memory by editing ...READ MORE

Oct 1, 2018 in Big Data Hadoop by slayer
 • 29,350 points • 1,482 views
0 votes
1 answer

Iterate twice on values (MapReduce)

We have to cache the values from ...READ MORE

Oct 1, 2018 in Big Data Hadoop by digger
 • 26,740 points • 1,920 views
0 votes
2 answers

How to convert .txt file to Hadoop's sequence file format

import java.io.IOException; import java.net.URI; import org.apache.hadoop.conf.Configuration; import org.apache.hadoop.fs.FileSystem; import org.apache.hadoop.fs.Path; import org.apache.hadoop.io.IOUtils; import ...READ MORE

Oct 12, 2018 in Big Data Hadoop by Sanjay
 • 3,235 views
+2 votes
5 answers

How to transpose/pivot data in hive?

Below is also a way for Pivot SELECT ...READ MORE

Oct 12, 2018 in Big Data Hadoop by Rahul
 • 19,220 views
0 votes
1 answer

Using Hadoop for Data Analytics.

Yes, your approach is correct - you ...READ MORE

Sep 28, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 540 views
0 votes
1 answer

How to write a file in HDFS using Java Programming language?

Define the HADOOP_CONF_DIR environment variable to your Hadoop configuration ...READ MORE

Sep 28, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 2,654 views
0 votes
1 answer

What should be the choice of database and what type of data format is suitable for Spark/hadoop?

Use Parquet. I'm not sure about CSV ...READ MORE

Sep 28, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 794 views
0 votes
1 answer

When I try to connect to Hadoop, I get a error as -"Connecting to Resource Manager failed".

Make sure you've started Yarn. Use this ...READ MORE

Sep 28, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 1,178 views
0 votes
1 answer

How will you choose various file formats for storing and processing data using Apache Hadoop ?

The decision to choose a particular file ...READ MORE

Sep 27, 2018 in Big Data Hadoop by zombie
 • 3,790 points • 1,587 views
+3 votes
5 answers

Hadoop DistributedCache is deprecated - what is the preferred API?

I had the same problem. And not ...READ MORE

Oct 12, 2018 in Big Data Hadoop by Rohan
 • 1,950 views
0 votes
1 answer

Permission denied at hdfs

You can spolve this by adding below ...READ MORE

Sep 27, 2018 in Big Data Hadoop by digger
 • 26,740 points • 2,416 views
0 votes
1 answer

Is Hadoop a good open-source project to join?

Yes, Hadoop has a whole ecosystem of ...READ MORE

Sep 27, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 726 views
0 votes
1 answer

Where can I find older versions of Hadoop?

You can check here. From the archives. In particular, ...READ MORE

Sep 27, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 513 views
0 votes
1 answer

How to exit name node from safe mode?

In order to forcefully let the namenode ...READ MORE

Sep 26, 2018 in Big Data Hadoop by slayer
 • 29,350 points • 1,765 views
0 votes
1 answer

How to write a file in hdfs with Java?

You could pass the URI when getting ...READ MORE

Sep 26, 2018 in Big Data Hadoop by digger
 • 26,740 points • 3,929 views
0 votes
1 answer

Spark - load CSV file as DataFrame?

spark-csv is part of core Spark functionality ...READ MORE

Sep 25, 2018 in Big Data Hadoop by slayer
 • 29,350 points • 6,653 views
0 votes
1 answer

Does map/reduce merge output files after reduce phase?

Hey there, instead of doing the file ...READ MORE

Sep 25, 2018 in Big Data Hadoop by digger
 • 26,740 points • 710 views
0 votes
1 answer

How to configure Hosts file for Hadoop Eco-System?

For UBUNTU Hosts File and other configuration for Hadoop ...READ MORE

Sep 25, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 3,951 views
0 votes
1 answer

In Hadoop what does dfs replicate mean?

The total number of files in the ...READ MORE

Sep 25, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 3,768 views
0 votes
1 answer

How to pass large records to map/reduce tasks?

Hadoop is not designed for records about ...READ MORE

Sep 25, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 1,243 views
0 votes
1 answer

Integration of Hadoop with Mongo DB concept

MongoDB isn't built to work on top ...READ MORE

Sep 25, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 1,516 views
0 votes
1 answer

ISR out of Replica

If the replica stays out of the ...READ MORE

Sep 24, 2018 in Big Data Hadoop by kurt_cobain
 • 9,390 points • 441 views
0 votes
1 answer

Kafka vs Flume

Even though both are used for real-time ...READ MORE

Sep 24, 2018 in Big Data Hadoop by Data_Nerd
 • 2,390 points • 707 views
0 votes
1 answer

Hadoop: intervals and JOIN

Hey, a solution was given on Biostar: http://biostar.stackexchange.com/questions/8821. Hope ...READ MORE

Sep 24, 2018 in Big Data Hadoop by slayer
 • 29,350 points • 438 views
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