Most voted questions in Big Data Hadoop

+1 vote
1 answer

Reading Performance in Hadoop Cluster

For speeding up reading performance of your ...READ MORE

Jul 25, 2018 in Big Data Hadoop by nitinrawat895
• 10,730 points
36 views
+1 vote
0 answers

How to set up Hadoop cluster on Mac in intelliJ IDEA

I have Installed hadoop using brew and ...READ MORE

Jul 25, 2018 in Big Data Hadoop by Neha
• 6,280 points
155 views
+1 vote
3 answers

when i tried to run the hdfs namenode -format command...its failed to run..can anyone help me with this???

Hi Suriyaprakash, I guess the path for hadoop ...READ MORE

Jul 23, 2018 in Big Data Hadoop by avi_man_utd
847 views
+1 vote
1 answer

When I try to execute any Hadoop commands error pops up saying unable to find or load main class M

The error might be due to the ...READ MORE

Jul 17, 2018 in Big Data Hadoop by Frankie
• 9,810 points
131 views
+1 vote
2 answers

What does hadoop fs -du command gives as output?

du command is used for to see ...READ MORE

Jul 23 in Big Data Hadoop by Lokesh Singh
1,102 views
+1 vote
2 answers

How to authenticate username & password while using Connector for Cloudera Hadoop in Tableau?

Hadoop server installed was kerberos enabled server. ...READ MORE

Aug 21, 2018 in Big Data Hadoop by Priyaj
• 56,940 points
224 views
+1 vote
1 answer

Is it necessary to use Zookeeper in Hadoop Stack?

ZooKeeper is a centralized service for maintaining ...READ MORE

Mar 27, 2018 in Big Data Hadoop by Ashish
• 2,630 points
129 views
+1 vote
1 answer

Hadoop Installation Issue on Windows

Below is the main error you are ...READ MORE

Mar 26, 2018 in Big Data Hadoop by nitinrawat895
• 10,730 points
859 views
+1 vote
1 answer

Cassandra and Hadoop - realtime vs batch

Apache Hadoop, is a big data analytics ...READ MORE

Mar 26, 2018 in Big Data Hadoop by nitinrawat895
• 10,730 points
758 views
+1 vote
1 answer

Where to set hadoop.tmp.dir? core-site.xml or hdfs-site.xml?

hadoop.tmp.dir (A base for other temporary directories) is ...READ MORE

Mar 26, 2018 in Big Data Hadoop by nitinrawat895
• 10,730 points
2,081 views
+1 vote
1 answer

Is Hadoop only Framework in Big Data Ecosystem ?

Actually there are many other frameworks, one of ...READ MORE

Mar 26, 2018 in Big Data Hadoop by Ashish
• 2,630 points
84 views
+1 vote
1 answer

Hadoop home path?

you can manually input the hadoop home ...READ MORE

Mar 26, 2018 in Big Data Hadoop by Ashish
• 2,630 points
842 views
+1 vote
1 answer

HDFS Permission

You have to check permissions on the ...READ MORE

Mar 26, 2018 in Big Data Hadoop by Ashish
• 2,630 points
38 views
+1 vote
1 answer

I installed Spark but while executing command, I am getting ‘hadoop’ command not found error?

For accessing Hadoop commands & HDFS, you ...READ MORE

Mar 21, 2018 in Big Data Hadoop by Shubham
• 13,310 points
296 views
+1 vote
2 answers

Failed to restart Hadoop namenode using cloudera quickstart

You can use cloudera manager to manage ...READ MORE

Mar 19, 2018 in Big Data Hadoop by kurt_cobain
• 9,260 points
837 views
+1 vote
2 answers

Execute Pig Script from Grunt Shell

From your current directory run  pig -x local Then ...READ MORE

Oct 25, 2018 in Big Data Hadoop by Kunal
958 views
0 votes
0 answers

Oozie filter all coordinator jobs based on nominalTime

Hi Edureka team. I would like to ...READ MORE

Nov 11 in Big Data Hadoop by Thayanban
• 120 points
19 views
0 votes
1 answer

how to escape delimiter in hive?

Refer to the below code used to ...READ MORE

Oct 31 in Big Data Hadoop by Kiran
53 views
0 votes
0 answers

Sqoop could not load db driver class

I am trying to connect postgres with ...READ MORE

Oct 25 in Big Data Hadoop by Ritu
• 120 points

edited Oct 25 by Ritu 53 views
0 votes
0 answers

Class not found exception in wordcount program in mapreduce

import org.apache.hadoop.conf.Configuration; import org.apache.hadoop.fs.Path; import java.io.IOException; import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat; import org.apache.hadoop.mapreduce.*; import org.apache.hadoop.mapreduce.lib.input.FileInputFormat; import ...READ MORE

Oct 3 in Big Data Hadoop by Tarun
• 120 points

edited Oct 3 by Omkar 79 views
0 votes
0 answers

flume twitter data file not generated in HDFS

I am using Apache Hadoop on Windows ...READ MORE

Sep 26 in Big Data Hadoop by chandanarora
• 120 points
72 views
0 votes
1 answer

Client not able to connect to cluster

There could be multiple reasons: Make sure you ...READ MORE

Sep 23 in Big Data Hadoop by Rishi
116 views
0 votes
1 answer

2 datanodes is slower ,how to get those details .what is your approach as hadoop admin

First, enable the detection of slow nodes. ...READ MORE

Sep 23 in Big Data Hadoop by Riya
113 views
0 votes
1 answer

bash: sbin/hadoop: No such file or directory

The hadoop command is not present in ...READ MORE

Sep 18 in Big Data Hadoop by Omkar
• 67,660 points
39 views
0 votes
0 answers

Missing Service request

Hello All, need assistance on one issue. ...READ MORE

Sep 17 in Big Data Hadoop by Hemanth
• 210 points
33 views
0 votes
2 answers

How to find the database daily refresh time / sync up time

I use this code to get the ...READ MORE

Sep 17 in Big Data Hadoop by Raman
64 views
0 votes
0 answers

Directory not found while using java -classpath

I'm using command java -classpath  ${HADOOP_CLASSPATH} -d '/home/shravanth/Desktop/wordcount/classes' ...READ MORE

Sep 14 in Big Data Hadoop by shravanth
31 views
0 votes
1 answer

How to run Hadoop 2.1.0 in Windows System?

Same problem but with recent Hadoop v. ...READ MORE

Sep 11 in Big Data Hadoop by ravikiran
• 4,560 points
42 views
0 votes
1 answer

Namenode v/s Secondary namenode

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

Sep 9 in Big Data Hadoop by ravikiran
• 4,560 points
109 views
0 votes
1 answer

Warning: unable to load hadoop native library

Just append word native to your HADOOP_OPTS like ...READ MORE

Sep 9 in Big Data Hadoop by ravikiran
• 4,560 points
28 views
0 votes
0 answers

hdfs namenode -format not working, not showing anything.

can someone help me with this please, ...READ MORE

Sep 6 in Big Data Hadoop by nar
33 views
0 votes
1 answer

Secondary Sorting in Hadoop MapReduce

Grouping Comparator Once the data reaches a reducer, ...READ MORE

Sep 5 in Big Data Hadoop by ravikiran
• 4,560 points
30 views
0 votes
1 answer

How to call MapReduce program using a simple Java Program?

Because map and reduce run on different ...READ MORE

Sep 4 in Big Data Hadoop by ravikiran
• 4,560 points
36 views
0 votes
2 answers

How to use scoop in a Java Program

There is a trick which worked out ...READ MORE

Sep 4 in Big Data Hadoop by ravikiran
• 4,560 points
80 views
0 votes
1 answer

sql exception when exporting

Hello @Hemanth, the error String or binary data ...READ MORE

Sep 4 in Big Data Hadoop by Ramya
81 views
0 votes
1 answer

What are all the Data quality checks we do in our real time Big Data projects.

You can use a checksum to compare ...READ MORE

Sep 4 in Big Data Hadoop by Tina
53 views
0 votes
1 answer

which one is better bigdata or devops for career

I think Big Data will be good ...READ MORE

Aug 26 in Big Data Hadoop by Karan
91 views
0 votes
0 answers

Cloudera Certification

Hi, I want to write CCA-175 (CCA Spark ...READ MORE

Aug 23 in Big Data Hadoop by Nagajyothi
• 160 points
39 views
0 votes
0 answers

HIve query data dates issue

Hello All, I am facing one issue, my ...READ MORE

Aug 21 in Big Data Hadoop by anonymous

edited Aug 22 by Omkar 49 views
0 votes
1 answer

I want to change the string datatype to timestamp, can anyone help me??

I am not sure if you want ...READ MORE

Aug 22 in Big Data Hadoop by Karan
36 views
0 votes
0 answers
0 votes
1 answer
0 votes
1 answer

Sqoop - moving data from DB2 to HDFS ( hive partition table)

sqoop import --driver com.ibm.db2.jcc.DB2Driver --connect jdbc:db2://db2.my.com:50000/databaseName --username ...READ MORE

Aug 9 in Big Data Hadoop by Payal
237 views
0 votes
1 answer

Exception in thread "main" java.lang.NoClassDefFoundError

As far I can make out from ...READ MORE

Aug 9 in Big Data Hadoop by Arpit
65 views
0 votes
1 answer

Unable to find Java and eclipse installation on my webconsole.

You can either install java and eclipse ...READ MORE

Aug 9 in Big Data Hadoop by Isha
35 views
0 votes
1 answer

Load data into teradata using sqoop export

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

Aug 9 in Big Data Hadoop by Kunal
142 views
0 votes
1 answer

When do Reduce tasks start in Hadoop?

As much I understand Reduce phase start ...READ MORE

Aug 9 in Big Data Hadoop by ravikiran
• 4,560 points
40 views
0 votes
1 answer

Fastest way to load bulk data in to HBase through a program

I've gone through a process that is ...READ MORE

Aug 8 in Big Data Hadoop by ravikiran
• 4,560 points
45 views