Most viewed questions in Big Data Hadoop

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1 answer

What is SerDe in Hadoop Hive?

The SerDe interface allows you to instruct ...READ MORE

Nov 21, 2018 in Big Data Hadoop by Akshay
 • 6,114 views
0 votes
1 answer

How hadoop mapreduce job is submitted to worker nodes?

Alright, I think you are basically looking ...READ MORE

Mar 30, 2018 in Big Data Hadoop by Ashish
 • 2,650 points • 6,045 views
0 votes
1 answer

What is the difference between MapReduce and YARN in Hadoop?

MapReduce: MapReduce is an algorithm used to store ...READ MORE

Dec 19, 2018 in Big Data Hadoop by Omkar
 • 69,180 points • 6,023 views
0 votes
1 answer

Sqoop installation on Linux

Before installing Sqoop, make sure Hadoop is ...READ MORE

Feb 26, 2019 in Big Data Hadoop by Suman
 • 6,011 views
0 votes
1 answer

Hive local inpath gives invalid path error

You are using the below command to ...READ MORE

May 23, 2019 in Big Data Hadoop by Jill
 • 6,003 views
0 votes
1 answer

Command to get status of all running Oozie workflow

Hey, You can use this command to get ...READ MORE

Jun 12, 2019 in Big Data Hadoop by Gitika
 • 65,730 points • 5,954 views
0 votes
1 answer

Hadoop: Error: Could not find or load main class com.sun.tools.javac.Main

It looks like the path is not ...READ MORE

Nov 30, 2018 in Big Data Hadoop by Omkar
 • 69,180 points • 5,942 views
0 votes
1 answer

How to import data to hbase database?

There are 3 Ways to Load Data ...READ MORE

Jul 10, 2019 in Big Data Hadoop by Karan Reddy
 • 5,938 views
+1 vote
1 answer

What is the process to perform an incremental data load in Sqoop?

The process to perform incremental data load ...READ MORE

Dec 17, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 5,933 views
0 votes
1 answer

Connect to Hive using Pyhive

Here's how we can connect to Hive ...READ MORE

Jan 8, 2019 in Big Data Hadoop by Omkar
 • 69,180 points • 5,926 views
0 votes
1 answer

Hadoop Hive: recursively descending into subdirectories without partitions or editing hive-site.xml

 I set the following properties before I ...READ MORE

Nov 15, 2018 in Big Data Hadoop by Omkar
 • 69,180 points • 5,913 views
0 votes
1 answer

Hadoop Hive: How to convert multiple rows into comma separated values?

You can use the aggregator function collect_set to do ...READ MORE

Nov 14, 2018 in Big Data Hadoop by Omkar
 • 69,180 points • 5,907 views
0 votes
1 answer

Hbase: Client not able to connect with remote Hbase server

You have to remove the localhost entry from hbase server's ...READ MORE

Nov 8, 2018 in Big Data Hadoop by Omkar
 • 69,180 points • 5,896 views
+1 vote
3 answers

HIVE: java.net.URISyntaxException

Change in hfs-site.xml this properties <name>hive.exec.scratchdir</name> <value>/tmp/hive-${user.name}</value> <name>hive.exec.local.scratchdir</name> <value>/tmp/${user.name}</value> <name>hive.downloaded.resources.dir</name> <value>/tmp/${user.name}_resources</value> <name>hive.scratch.dir.permission</name> ...READ MORE

Dec 5, 2018 in Big Data Hadoop by Roshan
 • 5,896 views
0 votes
1 answer

What are the different ways of Installing Hadoop into our local machine?

Hadoop runs on Unix and on Windows. ...READ MORE

Aug 4, 2018 in Big Data Hadoop by Neha
 • 6,300 points • 5,887 views
0 votes
1 answer

Granting SELECT privilege in Hive

You can use this command to do ...READ MORE

May 31, 2019 in Big Data Hadoop by Umar
 • 5,859 views
0 votes
1 answer

What is the difference between Map-side join and Reduce-side join?

Join is a clause that combines the records ...READ MORE

Dec 13, 2018 in Big Data Hadoop by Omkar
 • 69,180 points • 5,859 views
0 votes
1 answer

How to create a managed table in Hive?

You can use this command: create table employee(Name ...READ MORE

Dec 14, 2018 in Big Data Hadoop by Omkar
 • 69,180 points • 5,792 views
0 votes
1 answer

How to see the content of a table in hive?

Hello, If you want to see the content ...READ MORE

May 15, 2019 in Big Data Hadoop by Gitika
 • 65,730 points • 5,781 views
0 votes
1 answer

How to install Zookeeper in Ubuntu?

There are two ways to install Zookeeper: You ...READ MORE

Feb 20, 2019 in Big Data Hadoop by Omkar
 • 69,180 points • 5,779 views
+1 vote
1 answer

Namenode v/s Secondary namenode

Name Node is a primary node in ...READ MORE

Sep 9, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 5,746 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 • 5,739 views
0 votes
1 answer

What are the different daemons in yarn?

Hi, The different Daemons in YARN are:- Resources Manager:- Runs ...READ MORE

Apr 24, 2019 in Big Data Hadoop by Gitika
 • 65,730 points • 5,723 views
+1 vote
1 answer

" org.apache.hadoop.yarn.exceptions.YarnRuntimeException: Permissions incorrectly set for dir " problem

This error is caused when hadoop tries ...READ MORE

Sep 9, 2019 in Big Data Hadoop by Kumar
 • 5,685 views
0 votes
1 answer

Which latest Hadoop version is stable?

Try Checking this website: http://hadoop.apache.org/releases.html. Here you will ...READ MORE

Mar 26, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 5,685 views
0 votes
1 answer

How to install HBase on Linux?

To install Hbase, you first need the ...READ MORE

Feb 27, 2019 in Big Data Hadoop by Tanisha
 • 5,648 views
0 votes
1 answer

Sqoop: ERROR tool.BaseSqoopTool: Unrecognized argument

The command you are executing is slightly ...READ MORE

Aug 1, 2019 in Big Data Hadoop by Sam
 • 5,644 views
0 votes
1 answer

How can I change data in HDFS?

You can not modified data once stored ...READ MORE

Feb 19, 2019 in Big Data Hadoop by Rishi
 • 5,605 views
0 votes
1 answer

Why does my yarn application not have logs even with logging enabled?

yarn application -list command shows you all ...READ MORE

Mar 19, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 5,597 views
0 votes
2 answers

Using PHP to get all file names in a folder stored in HDFS

So i found a workaround for the ...READ MORE

Mar 13, 2019 in Big Data Hadoop by Bhavish
 • 370 points
edited Mar 13, 2019 by Omkar • 5,583 views
0 votes
1 answer

Hive: what location should I mention while creating table?

It can be a hdfs path. The ...READ MORE

May 23, 2019 in Big Data Hadoop by Jishan
 • 5,579 views
0 votes
1 answer

Is there any way to increase Java Heap size in Hadoop?

You can add some more memory by ...READ MORE

Apr 12, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 5,520 views
0 votes
1 answer

Whenever I try to start the yarn daemon. ./start-dfs.sh it says access denied I have even tried changing the file permissions but it didn't work.

Seems like the ssh is not properly ...READ MORE

Mar 8, 2019 in Big Data Hadoop by Omkar
 • 69,180 points • 5,500 views
0 votes
1 answer

Hadoop Mapper is failed because of the following error - “Container killed by the ApplicationMaster”

I suggest you include below property files ...READ MORE

Dec 1, 2018 in Big Data Hadoop by Omkar
 • 69,180 points • 5,486 views
0 votes
1 answer

How to create a Hive table from sequence file stored in HDFS?

There are two SerDe for SequenceFile as ...READ MORE

Dec 18, 2018 in Big Data Hadoop by Omkar
 • 69,180 points • 5,447 views
0 votes
1 answer

Hadoop HDFS: Exception in createBlockOutputStream

It's a connection error. Have you turned ...READ MORE

Nov 21, 2018 in Big Data Hadoop by Omkar
 • 69,180 points • 5,442 views
+1 vote
1 answer

flume twitter data file not generated in HDFS

Seems like you've missed the source and ...READ MORE

Dec 2, 2019 in Big Data Hadoop by Esha
 • 5,427 views
0 votes
1 answer

Why do we use job.waitForCompletion(true)?

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

Jul 10, 2019 in Big Data Hadoop by Josh
 • 5,349 views
0 votes
1 answer

How to find the default database in Hive?

Yes, you can find out which database ...READ MORE

May 20, 2019 in Big Data Hadoop by Shiro
 • 5,341 views
0 votes
1 answer

Hadoop: How to get the column name along with the output in Hive?

You can get the column names by ...READ MORE

Nov 21, 2018 in Big Data Hadoop by Omkar
 • 69,180 points • 5,304 views
0 votes
1 answer

Hadoop Spark Derby: Caused by: ERROR XSDB6: Another instance of Derby may have already booted the database

As mentioned in the error, there's another ...READ MORE

Nov 16, 2018 in Big Data Hadoop by Omkar
 • 69,180 points • 5,284 views
0 votes
1 answer

How to avoid a “split-brain” scenario with NameNodes?

Okay, so let me tell you that ...READ MORE

Jul 11, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 5,222 views
0 votes
1 answer

What happens when a datanode that is dead becomes active again?

When NameNode notices that it has not ...READ MORE

Jun 20, 2019 in Big Data Hadoop by Rishi
 • 5,190 views
0 votes
1 answer

Regarding unstructured data handling in hadoop

There are multiple ways to import unstructured ...READ MORE

Jul 9, 2019 in Big Data Hadoop by Jishan
 • 5,187 views
0 votes
1 answer

How to handle exceptions in Spark and Scala?

There is no particular format to handle ...READ MORE

Jan 22, 2019 in Big Data Hadoop by Omkar
 • 69,180 points • 5,187 views
0 votes
1 answer

How to remove the directory from HDFS?

Hi@akhtar, You can remove the directory using the ...READ MORE

Oct 13, 2020 in Big Data Hadoop by MD
 • 95,460 points • 5,181 views
+1 vote
1 answer

How to delete sqoop job?

get the list of jobs  ==========   sqoop ...READ MORE

Feb 1, 2022 in Big Data Hadoop by sudhakar
edited Mar 5 • 5,176 views
+1 vote
1 answer

How to read HDFS and local files with the same code in Java?

You can try something like this: ​ ...READ MORE

Nov 22, 2018 in Big Data Hadoop by Omkar
 • 69,180 points • 5,168 views
–1 vote
1 answer

Hadoop dfs -ls command?

In your case there is no difference ...READ MORE

Mar 16, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 5,158 views
–1 vote
1 answer

Incremental append in Sqoop

You are right. As Hadoop follows WORM ...READ MORE

Dec 31, 2018 in Big Data Hadoop by Omkar
 • 69,180 points • 5,146 views
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