Trending questions in Big Data Hadoop

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i tried to run hdfs namenode -format but i got this instead, -classpath and D:\Hadoop isn't recognized. Anyone can help? Thank you. [closed]

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Sep 3, 2019 in Big Data Hadoop by Fuad
closed Sep 10, 2019 • 1,623 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
 • 5,716 views
0 votes
1 answer

Write data into hive table in a parquet

Below is an example query which you ...READ MORE

Jul 26, 2019 in Big Data Hadoop by Sadu
 • 3,270 views
0 votes
1 answer

How to import data to hbase database?

First you have to have the file ...READ MORE

Jul 23, 2019 in Big Data Hadoop by Kiran
 • 3,397 views
0 votes
1 answer

How to delete a column family from table in HBase?

Hey, You can delete a column family from ...READ MORE

Jun 21, 2019 in Big Data Hadoop by Gitika
 • 65,730 points • 4,783 views
0 votes
1 answer

How can create the dynamic partition table with data in Hive?

Hi, We can see some steps to do ...READ MORE

Jun 20, 2019 in Big Data Hadoop by Gitika
 • 65,730 points • 4,778 views
0 votes
1 answer

Use of Group ALL in Pig

Suppose we have a data set as ...READ MORE

Jul 10, 2019 in Big Data Hadoop by Roshan
 • 3,846 views
0 votes
1 answer

Sqoop: Dsqoop.export.records.per.statement option

Dsqoop.export.records.per.statement=1 is as the name suggests how many ...READ MORE

Jul 15, 2019 in Big Data Hadoop by Krish
 • 3,611 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
 • 5,868 views
0 votes
2 answers

Is there a .NET equivalent to Apache Hadoop?

Hadoop is a Java-based platform. So, to ...READ MORE

Jul 16, 2020 in Big Data Hadoop by Suhana
 • 340 points • 2,094 views
0 votes
1 answer

Current Date in Hive

Try this instead: select from_unixtime(unix_timestamp()); If you have an ...READ MORE

Jul 25, 2019 in Big Data Hadoop by Tina
 • 3,111 views
0 votes
2 answers

What is a container in YARN?

Yarn container are a process space where ...READ MORE

May 2, 2020 in Big Data Hadoop by anonymous
 • 7,176 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
 • 250 points
edited Aug 7, 2019 by Omkar • 2,572 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 • 2,431 views
0 votes
1 answer

Output types of mapper and reducer does not match

job.setOutputValueClass will set the types expected as ...READ MORE

Jul 22, 2019 in Big Data Hadoop by Reena
 • 3,140 views
0 votes
1 answer

Why we use 'help' command in Hadoop Sqoop?

Hi, The command sqoop help lists the tools ...READ MORE

Feb 4, 2020 in Big Data Hadoop by MD
 • 95,460 points • 1,079 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, 2019 in Big Data Hadoop by shravanth
 • 775 views
0 votes
1 answer

Pig: Difference between inner bag and outer bag

Outer Bag: An outer bag is nothing but ...READ MORE

Jul 16, 2019 in Big Data Hadoop by Firoz
 • 3,358 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
 • 65,730 points • 2,485 views
0 votes
1 answer

How to find in incorrect file/records in hive?

A value with a wrong datatype causes ...READ MORE

Jul 25, 2019 in Big Data Hadoop by Ritu
 • 2,949 views
0 votes
1 answer

how to store images and videos on to HDFS?

HDFS is capable to accept data in ...READ MORE

Jul 16, 2019 in Big Data Hadoop by ravikiran
 • 4,620 points • 3,343 views
0 votes
1 answer

Error: Execution Error, Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.mr.MapRedTask. Permission denied:

Hey, The error you are getting because the ...READ MORE

May 15, 2019 in Big Data Hadoop by Gitika
 • 65,730 points • 6,022 views
0 votes
1 answer

Why am I getting error as hdfs dfs -mkdir, No such file or directory when I create a directory?

It is because the parent directories do ...READ MORE

Sep 10, 2018 in Big Data Hadoop by Frankie
 • 9,830 points • 16,614 views
0 votes
1 answer

What is the default location of Hadoop log files & how can I change that location?

The default directory of Hadoop log file ...READ MORE

May 4, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 22,166 views
0 votes
1 answer

Sqoop export not working

The issue that you might be getting ...READ MORE

Jul 16, 2019 in Big Data Hadoop by Tina
 • 3,245 views
0 votes
1 answer

Parquet & Avro File hadling with HIVE

For avro you can follow the format ...READ MORE

Jul 25, 2019 in Big Data Hadoop by Tarun
 • 2,810 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
 • 5,464 views
+1 vote
2 answers

Hadoop: Error: Exception in thread “main” java.lang.UnsupportedClassVersionError: a

The reason for this error is because ...READ MORE

Aug 6, 2019 in Big Data Hadoop by Venkita
 • 240 points • 2,122 views
0 votes
2 answers

Sqoop: Could not load mysql driver exception.

I add mysql driver for sqoop and it ...READ MORE

Mar 1, 2020 in Big Data Hadoop by Manh Quang
 • 180 points • 4,158 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
 • 2,422 views
0 votes
1 answer

Hadoop: Error: Exception in thread "main" java.lang.IncompatibleClassChangeError: Found interface org.apache.hadoop.mapreduce.JobContext, but class was expected

Hey, The error seems you have not add ...READ MORE

Aug 7, 2019 in Big Data Hadoop by Gitika
 • 65,730 points • 2,109 views
–1 vote
1 answer

How to start namenode and datanode individually?

You can use these commands. For namenode: ./hadoop-daemon.sh start ...READ MORE

Dec 21, 2018 in Big Data Hadoop by Omkar
 • 69,180 points • 12,020 views
0 votes
1 answer

What is grunt shell in pig?

Hey, Grunt shell is a shell command.The Grunts ...READ MORE

May 6, 2019 in Big Data Hadoop by Gitika
 • 65,730 points • 6,089 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
 • 65,730 points • 2,127 views
+2 votes
2 answers

Create HIVE Table with multi character delimiter

FILELDS TERMINATED BY does not support multi-character delimiters. ...READ MORE

Oct 3, 2018 in Big Data Hadoop by slayer
 • 29,370 points • 15,041 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 • 1,460 views
0 votes
2 answers

Meaning of fs.defaultFS property in core-site.xml in hadoop

It allows to run dfs commands more ...READ MORE

Jan 22, 2020 in Big Data Hadoop by MD
 • 95,460 points • 8,657 views
0 votes
1 answer

ERROR tool.ImportTool: Encountered IOException running import job: java.io.IOException: Cannot run program "hive": error=2, No such file or directory

The tables look fine. Follow these steps ...READ MORE

Jul 29, 2019 in Big Data Hadoop by Kiran
 • 2,352 views
0 votes
1 answer

What if Resource Manager fails?

Failure of the resource manager is serious ...READ MORE

Jun 20, 2019 in Big Data Hadoop by John
 • 4,037 views
0 votes
1 answer

How can we ignore header line while loading data into Pig?

Suppose you need to load this in ...READ MORE

Jul 10, 2019 in Big Data Hadoop by Kiran
 • 3,165 views
0 votes
1 answer

How to load data from flat files into Hive?

Hey, You can load data from flat files ...READ MORE

Jun 26, 2019 in Big Data Hadoop by Gitika
 • 65,730 points • 3,765 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 • 5,614 views
0 votes
1 answer

ERROR org.apache.hadoop.hdfs.server.namenode.FSNamesystem: FSNamesystem initialization failed. java.io.FileNotFoundException: /app/hadoop/tmp/dfs/name/in_use.lock

Hi, You can change the owner to Hadoop ...READ MORE

Aug 5, 2019 in Big Data Hadoop by Gitika
 • 65,730 points • 2,031 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
 • 2,256 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
 • 65,730 points • 1,912 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 • 1,866 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
 • 65,730 points • 1,894 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 30, 2019 in Big Data Hadoop by K
 • 130 points
reshown Mar 4 by K • 850 views
0 votes
2 answers

How to set up Map and Reduce Tasks?

Hi, The number of map tasks for a ...READ MORE

Aug 5, 2019 in Big Data Hadoop by Rashi
 • 2,461 views
0 votes
1 answer

Hadoop: Error: Could not find or load main class org.apache.hadoop.util.VersionInfo

This seems like a path issue. Add the ...READ MORE

Nov 16, 2018 in Big Data Hadoop by Omkar
 • 69,180 points • 13,271 views
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