Most voted questions in Big Data Hadoop

0 votes
1 answer

Sqoop could not load db driver class

Hello, Have you tried to put the both ...READ MORE

Dec 13, 2019 in Big Data Hadoop by Alexandru
 • 510 points • 1,642 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, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 1,096 views
0 votes
1 answer

Warning: unable to load hadoop native library

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

Sep 9, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 665 views
0 votes
1 answer

Secondary Sorting in Hadoop MapReduce

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

Sep 5, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 725 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, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 638 views
0 votes
2 answers

How to use scoop in a Java Program

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

Sep 4, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 809 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, 2019 in Big Data Hadoop by Karan
 • 1,511 views
0 votes
0 answers

Cloudera Certification

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

Aug 23, 2019 in Big Data Hadoop by Nagajyothi
 • 160 points • 208 views
0 votes
0 answers

HIve query data dates issue

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

Aug 22, 2019 in Big Data Hadoop by anonymous
edited Aug 22, 2019 by Omkar • 377 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, 2019 in Big Data Hadoop by Karan
 • 205 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 21, 2019 in Big Data Hadoop by dodo aly
 • 162 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, 2019 in Big Data Hadoop by Nagajyothi
 • 160 points • 331 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, 2019 in Big Data Hadoop by Payal
 • 2,959 views
0 votes
1 answer

Exception in thread "main" java.lang.NoClassDefFoundError

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

Aug 9, 2019 in Big Data Hadoop by Arpit
 • 1,507 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, 2019 in Big Data Hadoop by Isha
 • 225 views
0 votes
1 answer

Load data into teradata using sqoop export

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

Aug 9, 2019 in Big Data Hadoop by Kunal
 • 2,806 views
0 votes
1 answer

When do Reduce tasks start in Hadoop?

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

Aug 9, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 265 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, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 504 views
0 votes
1 answer

Difference between Text and String in Hadoop

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

Aug 8, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 1,124 views
0 votes
1 answer

Hadoop: ERROR: namenode.NameNode: Could not initialize shared edits dir java.io.IOException: Cannot start an HA namenode with name dirs that need recovery.

Hi, You can do one thing: Create namenode dir with ...READ MORE

Aug 8, 2019 in Big Data Hadoop by Gitika
 • 65,870 points • 748 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, 2019 in Big Data Hadoop by Gitika
 • 65,870 points
edited Aug 7, 2019 by Gitika • 693 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, 2019 in Big Data Hadoop by Gitika
 • 65,870 points • 961 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, 2019 in Big Data Hadoop by Gitika
 • 65,870 points • 1,399 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, 2019 in Big Data Hadoop by Gitika
 • 65,870 points • 755 views
0 votes
1 answer

Hadoop: Error: Hadoop Master cannot start the Slave with different user (or) Slave with different user failed to start by Hadoop Master node.

Hi, You can use these commands to get ...READ MORE

Aug 7, 2019 in Big Data Hadoop by Gitika
 • 65,870 points • 892 views
0 votes
1 answer

Hadoop: Error: slave: bash: line 0: cd: /opt/hadoop-1.1.0/libexec/..: No such file or directory

Hi,   In this case, it is searching ...READ MORE

Aug 7, 2019 in Big Data Hadoop by Gitika
 • 65,870 points • 711 views
0 votes
0 answers

ava.sql.SQLException: Error while processing statement:

Hi everyone, I am facing one issue ...READ MORE

Aug 7, 2019 in Big Data Hadoop by Hemanth
 • 240 points
edited Aug 7, 2019 by Omkar • 1,123 views
0 votes
1 answer

Zookeeper: client.HConnnectionManager HConbectionImplementation: Cant get connection to Zookeeper:KeeperErrorCode

In edureka vm once you start hbase ...READ MORE

Aug 6, 2019 in Big Data Hadoop by Chiraya
 • 329 views
0 votes
1 answer

Unable to create table in Hive

It is looking like your Hadoop daemons ...READ MORE

Aug 6, 2019 in Big Data Hadoop by Yogi
 • 242 views
0 votes
1 answer

Error: Zookeeper address not found from MapRFilesystem

Hey, Yarn is configured with the "zero-configuration failover". So ...READ MORE

Aug 6, 2019 in Big Data Hadoop by Gitika
 • 65,870 points • 558 views
0 votes
1 answer

How to assign server access to client(s) through NFS export file?

Hi, You can create the export folder, you will ...READ MORE

Aug 5, 2019 in Big Data Hadoop by Gitika
 • 65,870 points • 246 views
0 votes
1 answer

Hadoop: ERROR datanode.DataNode: All directories in dfs.data.dir are invalid.

Hi, Try this, first delete all contents from ...READ MORE

Aug 5, 2019 in Big Data Hadoop by Gitika
 • 65,870 points • 896 views
0 votes
1 answer

Hadoop: error: Cannot lock storage /app/hadoop/tmp/dfs/name. The directory is already locked.

Hi, Check your dfs.name.dir and dfs.data.dir path in hdfs-site.xml. Or ...READ MORE

Aug 5, 2019 in Big Data Hadoop by Gitika
 • 65,870 points • 1,161 views
0 votes
1 answer

DJOB TRACKER : Can not start task tracker because java.lang.IllegalArgumentException: Does not contain a valid host:port authority: 127.0.0.1:9001

Hey, According to your property set up, there ...READ MORE

Aug 5, 2019 in Big Data Hadoop by Gitika
 • 65,870 points • 261 views
0 votes
1 answer

Sqoop: ERROR tool.BaseSqoopTool: Error parsing arguments

There are two mistakes in the command ...READ MORE

Aug 2, 2019 in Big Data Hadoop by Kunal
 • 5,024 views
0 votes
1 answer

Can't seem to read files: "Invalid container ID"

You will have to start pig first ...READ MORE

Aug 2, 2019 in Big Data Hadoop by TIna
 • 478 views
0 votes
0 answers

Job failed as tasks failed. failedMaps

Hello All, I am new to hadoop, i ...READ MORE

Aug 1, 2019 in Big Data Hadoop by Hemanth
 • 240 points
edited Aug 1, 2019 by Omkar • 4,749 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
 • 3,293 views
0 votes
1 answer

Hive: org.apache.hadoop.security.AccessControlException Permission denied: user

This error is generally thrown when the ...READ MORE

Aug 1, 2019 in Big Data Hadoop by Waniku
 • 2,162 views
0 votes
1 answer

Cassandra: time out when using select * or copy command

If we get the TimeOut Exception, then ...READ MORE

Aug 1, 2019 in Big Data Hadoop by Esha
 • 690 views
0 votes
1 answer

Unzip files in hdfs

To unzip a gzipped (or bzipped) file, ...READ MORE

Jul 31, 2019 in Big Data Hadoop by Joe
 • 3,534 views
0 votes
1 answer

PIG Error while loading file: -bash: syntax error near unexpected token `('

Since your data is delimited with tabs ...READ MORE

Jul 31, 2019 in Big Data Hadoop by Ritu
 • 1,140 views
0 votes
1 answer

How to select particular column In a table in hive?

Hive is a high-level language to analyze ...READ MORE

Jul 31, 2019 in Big Data Hadoop by Killian
 • 5,915 views
0 votes
1 answer

Pig: Remove header line in csv file

Refer to the below file det.txt: Name,Age,Location a,10,chennai b,20,bangalore We will ...READ MORE

Jul 31, 2019 in Big Data Hadoop by Yogi
 • 1,040 views
0 votes
1 answer

Does Caching stand as the only advantage in Spark compared to Hadoop?

Spark has much lower per job and ...READ MORE

Jul 31, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 174 views
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