Latest questions in Big Data Hadoop

+1 vote
0 answers

Hadoop Mapreduce : Null Pointer Exception

While running the below program, I got ...READ MORE

1 day ago in Big Data Hadoop by Tarun
 • 160 points • 6 views
+1 vote
1 answer

Hadoop Learning Path

Hi! Since you have only 6 weeks, it's ...READ MORE

Nov 28 in Big Data Hadoop by Farheen
 • 42 views
+1 vote
1 answer

datanode decomissioning

You have set the replication factor to ...READ MORE

Nov 28 in Big Data Hadoop by Rahul
 • 44 views
+2 votes
0 answers

Hello, trying to install Hadoop on single node. Error: in screenshot

READ MORE

Nov 20 in Big Data Hadoop by faris
 • 140 points • 59 views
+1 vote
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
 • 130 points • 57 views
+1 vote
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
 • 88 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 • 70 views
+1 vote
2 answers

Unable to create external table on HIVE

Hi @Ozer, This error occurred because there is ...READ MORE

Nov 6 in Big Data Hadoop by Richa
 • 169 views
+1 vote
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
 • 160 points
edited Oct 3 by Omkar • 93 views
+1 vote
1 answer

flume twitter data file not generated in HDFS

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

5 days ago in Big Data Hadoop by Esha
 • 85 views
+1 vote
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
 • 120 views
+1 vote
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
 • 129 views
+1 vote
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
 • 68,180 points • 47 views
+1 vote
0 answers

Missing Service request

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

Sep 17 in Big Data Hadoop by Hemanth
 • 240 points • 36 views
+1 vote
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
 • 75 views
+1 vote
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
 • 33 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
 • 4,580 points • 45 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 in Big Data Hadoop by Kumar
 • 119 views
+1 vote
1 answer

Namenode v/s Secondary namenode

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

Sep 9 in Big Data Hadoop by ravikiran
 • 4,580 points • 121 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
 • 4,580 points • 36 views
+1 vote
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
 • 42 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
 • 4,580 points • 40 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
 • 4,580 points • 42 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
 • 4,580 points • 92 views
+1 vote
1 answer

sql exception when exporting

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

Sep 4 in Big Data Hadoop by Ramya
 • 102 views
+1 vote
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
 • 62 views
+3 votes
0 answers

How to handle Sqoop failure program and restart the job from failed tables?

When running a Sqoop jobs on a ...READ MORE

Aug 29 in Big Data Hadoop by Kunal
 • 150 points
edited Sep 5 by Kunal • 193 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
 • 130 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 • 44 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 • 58 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
 • 38 views
0 votes
0 answers

How to replicate task so that a task will be computed by two mappers? Or each task will be done twice.

i want replicate task of mapper but ...READ MORE

Aug 20 in Big Data Hadoop by dodo aly
 • 26 views
0 votes
1 answer

whenever i trying to put the data file on hdfs then this types or error ate encountered.

Try -copyFromLocal command READ MORE

Aug 23 in Big Data Hadoop by Nagajyothi
 • 160 points • 66 views
+1 vote
0 answers

Output of dump command has empty records

this is my input file output_pig_group_education_comma/input_load.txt and its ...READ MORE

Aug 10 in Big Data Hadoop by Manju Bhargavi
 • 48 views
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
 • 304 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
 • 80 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
 • 41 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
 • 200 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
 • 4,580 points • 44 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
 • 4,580 points • 55 views
0 votes
1 answer

Difference between Text and String in Hadoop

The binary representation of a Text object ...READ MORE

Aug 8 in Big Data Hadoop by ravikiran
 • 4,580 points • 114 views
0 votes
1 answer

Error: Hive show tables does not display table "sqooptest" , which was imported by SQOOP

Hi, You can follow the below-given solution. Just enter ...READ MORE

Aug 7 in Big Data Hadoop by Gitika
 • 25,420 points
edited Aug 7 by Gitika • 55 views
0 votes
1 answer

Error: ERROR security.UserGroupInformation: PriviledgedActionException as:root (auth:SIMPLE)

Hey, For me, my Hadoop NameNode was in ...READ MORE

Aug 7 in Big Data Hadoop by Gitika
 • 25,420 points • 66 views
0 votes
1 answer

Hadoop: ERROR1070: Could not resolve count using imports: [, java.lang., org.apache.pig.builtin., org.apache.pig.impl.builtin.]

Hi, I can see the error arose because the count ...READ MORE

Aug 7 in Big Data Hadoop by Gitika
 • 25,420 points • 37 views
0 votes
1 answer

Hadoop:Error: Network is unreachable; Host Details : local host is: "localhost/127.0.0.1"; destination host is: "boss":32939;

Hey,  I guess there is no IP address ...READ MORE

Aug 7 in Big Data Hadoop by Gitika
 • 25,420 points • 60 views
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