Trending questions in Big Data Hadoop

+1 vote
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hdfs namenode -format not working, not showing anything.

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

Sep 6, 2019 in Big Data Hadoop by nar
 • 2,087 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 • 2,149 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 • 10,019 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
 • 6,264 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
 • 65,730 points • 3,295 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 • 5,345 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
 • 4,479 views
+1 vote
0 answers

Missing Service request

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

Sep 17, 2019 in Big Data Hadoop by Hemanth
 • 250 points • 1,457 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 • 3,265 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 • 2,713 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
 • 3,710 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
 • 7,817 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 • 5,248 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
 • 6,385 views
0 votes
0 answers

The total number of Data Nodes running in this operation are 0 and note that there are no nodes excluded in this process.

I have set up a multi-node Hadoop ...READ MORE

Jul 31, 2019 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 3,451 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
 • 4,082 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
 • 3,765 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
 • 3,624 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 • 12,924 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 • 6,997 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
 • 3,920 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 • 6,598 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 • 15,931 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 • 2,872 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 • 2,949 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 • 1,489 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 • 3,766 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
 • 3,353 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 • 14,168 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
 • 3,315 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
 • 1,117 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
 • 3,658 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 • 2,673 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 • 4,706 views
0 votes
2 answers

Difference between HDFS and NFS

In NFS, the data is stored only ...READ MORE

Feb 4, 2019 in Big Data Hadoop by Kumar
 • 16,450 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
 • 5,875 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 • 2,014 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
 • 2,887 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 • 2,567 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
 • 3,076 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
 • 4,583 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
 • 2,809 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 • 6,144 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 • 2,553 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 • 2,535 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 • 4,255 views
0 votes
1 answer

How to find the default database in Hive?

Yes, you can find out which database ...READ MORE

May 20, 2019 in Big Data Hadoop by Shiro
 • 5,777 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
 • 3,571 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
 • 2,740 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
 • 65,730 points • 2,352 views
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