Trending questions in Big Data Hadoop

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Hadoop: ERROR: datanode.DataNode: java.io.IOException: Datanode state: LV = -32 CTime = 1377582559943 is newer than the namespace state: LV = -32 CTime = 0

Hey, You can do one thing, open the file ...READ MORE

Aug 5, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 1,123 views
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1 answer

Load data from HDFS to hive

You can't directly create a parquet table. ...READ MORE

Feb 8, 2019 in Big Data Hadoop by Omkar
 • 69,220 points • 8,837 views
0 votes
2 answers

Exception in thread "main" java.lang.UnsupportedClassVersionError

Hi, keep in mind do not forget to ...READ MORE

Aug 5, 2019 in Big Data Hadoop by Rashi
 • 1,494 views
0 votes
1 answer

How to subtract month from Impala time stamp?

You don't need another method, you can ...READ MORE

Jun 6, 2019 in Big Data Hadoop by Tina
 • 3,617 views
0 votes
1 answer

Unable to Locate WinUtils Library in Hadoop binary path.

If you are facing this problem while running a ...READ MORE

Jul 11, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 2,104 views
+1 vote
2 answers

Hadoop Administration

Make the following changes to your configuration ...READ MORE

Aug 5, 2019 in Big Data Hadoop by Simran
 • 978 views
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1 answer

Name node RAM metadata

For the above requirement, the memory consumption ...READ MORE

Jul 23, 2019 in Big Data Hadoop by Reshma
 • 1,578 views
0 votes
1 answer

Error while Loading data to Hive.

Your data node is not running that ...READ MORE

Jul 29, 2019 in Big Data Hadoop by Quill
 • 1,295 views
0 votes
1 answer

How to set Hive Server port?

You can set the port in the hive-site.xml file. ...READ MORE

May 31, 2019 in Big Data Hadoop by Aisha
 • 3,827 views
0 votes
1 answer

failed to start the Namenode format in hadoop generation 2

Hi, You can check this out: 1. Delete all ...READ MORE

Jul 2, 2019 in Big Data Hadoop by Ria
edited Jul 2, 2019 by Gitika • 2,455 views
0 votes
1 answer

How to Suspending a Workflow, Coordinator or Bundle Job in Oozie?

Hey, The suspend option suspends a workflow job in RUNNING status. After ...READ MORE

Jun 24, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 2,791 views
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1 answer

Command to stop the zookeeper server?

Hey, After connecting the server and performing all ...READ MORE

May 28, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 3,979 views
0 votes
1 answer

Which one is better MR or Spark?

The above difference clearly points out that ...READ MORE

Jul 15, 2019 in Big Data Hadoop by Daniel
 • 1,873 views
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2 answers

Namenode is not getting started

Hi, You can do one thing, first delete all ...READ MORE

Aug 5, 2019 in Big Data Hadoop by Namisha
 • 1,200 views
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1 answer

What is Shared Edit Logs in case of Stand By Name Node in Hadoop 2.x?

Yes, Shared Edit Logs exist in case ...READ MORE

Jun 19, 2019 in Big Data Hadoop by Hansini
 • 2,945 views
0 votes
1 answer

Hive: LOCATION and WITH DBPROPERTIES command in create table command

By default, the Hive database will be ...READ MORE

May 22, 2019 in Big Data Hadoop by Firoz
 • 4,143 views
0 votes
1 answer

How to Compress Map output?

With MR2, now we should set conf.set("mapreduce.map.output.compress", true)  conf.set("mapreduce.output.fileoutputformat.compress", ...READ MORE

Jul 24, 2019 in Big Data Hadoop by Varun
 • 1,418 views
0 votes
1 answer

Hive- unable to load data into table

The command you are typing is incorrect. ...READ MORE

Jul 24, 2019 in Big Data Hadoop by Firoz
 • 1,415 views
0 votes
1 answer

How to use appnedToFile command in HDFS?

Hey, This Hadoop fs command appends single sources ...READ MORE

Jun 20, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 2,914 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 • 714 views
+1 vote
2 answers

Error: com/eng/mr/WordCountDriver : Unsupported major.minor version 52.0

The reason why you get this error ...READ MORE

Aug 6, 2019 in Big Data Hadoop by Venkita
 • 240 points • 771 views
0 votes
1 answer

Command to see the status of MapReduce job?

Hi, You can use this command given below: Syntax: $ ...READ MORE

Jun 14, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 3,120 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
 • 673 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
 • 807 views
0 votes
1 answer

Can a table be renamed in hive?

Hey, Yes, you can rename a table in ...READ MORE

Jun 26, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 2,602 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
 • 795 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
 • 65,770 points • 5,309 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
 • 65,770 points • 816 views
0 votes
1 answer

How to Modify the Maximum Number of Versions for a Column Family in Hbase?

Hey, The example uses HBase Shell to keep ...READ MORE

May 31, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 3,656 views
0 votes
1 answer

What is DAG in Hive?

Hey, DAG in Hive architecture is nothing but ...READ MORE

May 11, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 4,505 views
0 votes
1 answer

Is it possible to change the default location of a managed table?

Hi, Yes, you can do it by using ...READ MORE

Jun 18, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 2,812 views
0 votes
1 answer

What are the challenges we faced as Hadoop Admin?

Hey,  There are some of the key responsibilities ...READ MORE

Jun 25, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 2,513 views
0 votes
1 answer

Not a host:port pair: PBUF?

Hey. This error usually occurs when the ...READ MORE

Jul 22, 2019 in Big Data Hadoop by Esha
 • 1,388 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
 • 65,770 points • 689 views
0 votes
1 answer

Error: permission denied locoalhost: chown: cannot access /usr/local/hadoop/ No such file or directory

Hey, As the error suggested that you have ...READ MORE

Jun 17, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 2,800 views
0 votes
1 answer

What is the role of Job tracker Hadoop?

Job tracker's function is resource management, tracking ...READ MORE

Apr 9, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 5,762 views
0 votes
1 answer

Unable to run Sqoop scirpt to copy data to Cassandra

Unfortunately, this can't be achieved with open ...READ MORE

Jul 23, 2019 in Big Data Hadoop by Shri
 • 1,190 views
0 votes
1 answer

How to download Large Hadoop[]closed] Data?

The best thing with Millions Songs Dataset ...READ MORE

Jul 23, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points
edited Jul 25, 2019 by ravikiran • 1,152 views
0 votes
1 answer

What is fork Keyword in Oozie? How Fork and Join keyword are related t o each other in Oozie?

Hey, Basically, when we want to run multiple jobs ...READ MORE

Jun 12, 2019 in Big Data Hadoop by Gitika
 • 65,770 points • 2,962 views
0 votes
1 answer

Mapreduce: What is the use of setting the name of the job?

Job job = new Job(conf,"job_name"), is just ...READ MORE

Jul 22, 2019 in Big Data Hadoop by Madhu
 • 1,191 views
0 votes
1 answer

Install PostgreSQL JDBC driver for Sqoop

All you have to do to install ...READ MORE

Jun 6, 2019 in Big Data Hadoop by Quill
 • 3,179 views
0 votes
2 answers

What is the relationship between Hadoop and Database?

Hadoop software framework work is very well ...READ MORE

Aug 6, 2019 in Big Data Hadoop by Dinesh
 • 1,409 views
0 votes
1 answer

Mapreduce: custom Input format

Here's a list of Input Formats: CombineFileInputFormat CombineS ...READ MORE

Jul 24, 2019 in Big Data Hadoop by Veer
 • 1,072 views
0 votes
1 answer

MapReduce to count alphabets

Please find the code below for alphabet ...READ MORE

May 23, 2019 in Big Data Hadoop by Firoz
 • 3,730 views
0 votes
1 answer

Map-reduce code for finding average salary

You can choose your mapper output key ...READ MORE

May 22, 2019 in Big Data Hadoop by Yogi
 • 3,739 views
0 votes
1 answer

Why do we use job.waitForCompletion(true) ?

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

Jul 22, 2019 in Big Data Hadoop by Kiran
 • 1,103 views
0 votes
1 answer

How to fix corrupt files on HDFS

1 - Spark if following slave/master architecture. So ...READ MORE

Jul 18, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 1,245 views
0 votes
1 answer

Hive query: Join tables based on ID

After creating the tables a1 and b1 ...READ MORE

Jul 25, 2019 in Big Data Hadoop by Tarun
 • 950 views
+1 vote
1 answer

Sqoop: How to load all tables except one?

You can use the import-all-tables option and along with ...READ MORE

Feb 18, 2019 in Big Data Hadoop by Omkar
 • 69,220 points • 7,665 views
0 votes
1 answer

Running Mapreduce on compressed data

It is very straight forward, no need ...READ MORE

Jul 24, 2019 in Big Data Hadoop by Nanda
 • 910 views
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