Most voted questions in Big Data Hadoop

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Difference between Text and String in Hadoop

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

Aug 8 in Big Data Hadoop by ravikiran
• 4,560 points
85 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
• 25,360 points

edited Aug 7 by Gitika 44 views
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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
• 25,360 points
50 views
0 votes
1 answer
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1 answer
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 in Big Data Hadoop by Gitika
• 25,360 points
59 views
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0 answers

ava.sql.SQLException: Error while processing statement:

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

Aug 7 in Big Data Hadoop by Hemanth
• 210 points

edited Aug 7 by Omkar 81 views
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1 answer
0 votes
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Unable to create table in Hive

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

Aug 6 in Big Data Hadoop by Yogi
32 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 5 in Big Data Hadoop by Gitika
• 25,360 points
31 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 in Big Data Hadoop by Gitika
• 25,360 points
30 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 in Big Data Hadoop by Gitika
• 25,360 points
56 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 in Big Data Hadoop by Gitika
• 25,360 points
81 views
0 votes
1 answer

Sqoop: ERROR tool.BaseSqoopTool: Error parsing arguments

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

Aug 2 in Big Data Hadoop by Kunal
231 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 in Big Data Hadoop by TIna
40 views
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0 answers

Job failed as tasks failed. failedMaps

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

Aug 1 in Big Data Hadoop by Hemanth
• 210 points

edited Aug 1 by Omkar 316 views
0 votes
1 answer

Sqoop: ERROR tool.BaseSqoopTool: Unrecognized argument

The command you are executing is slightly ...READ MORE

Aug 1 in Big Data Hadoop by Sam
132 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 in Big Data Hadoop by Waniku
149 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 in Big Data Hadoop by Esha
31 views
0 votes
1 answer

Unzip files in hdfs

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

Jul 31 in Big Data Hadoop by Joe
37 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 in Big Data Hadoop by Ritu
90 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 in Big Data Hadoop by Killian
34 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 in Big Data Hadoop by Yogi
60 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 in Big Data Hadoop by ravikiran
• 4,560 points
21 views
0 votes
1 answer
0 votes
1 answer

Different between zkfc and zookeeper

Hey, The key difference between both the components ...READ MORE

Jul 31 in Big Data Hadoop by Sunny
1 flag 109 views
0 votes
1 answer

Hive: Assign subquery to variable

Refer to this example: Step1: Check table test1 ...READ MORE

Jul 30 in Big Data Hadoop by Tina
40 views
0 votes
1 answer

FAILEDError: java.io.IOException: Type mismatch in key from map

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

Jul 30 in Big Data Hadoop by Rishi
48 views
0 votes
1 answer

Converting CSV files to Parquet

--Create Hive external Table for existing data CREATE ...READ MORE

Jul 30 in Big Data Hadoop by Yogi
499 views
0 votes
1 answer
0 votes
1 answer

What is "java.sql.SQLException: org.apache.thrift.transport.TTransportException" in Hive?

This particular exception is related to Hive logs. ...READ MORE

Jul 30 in Big Data Hadoop by ravikiran
• 4,560 points
260 views
0 votes
1 answer

What is the difference between S3n, S3a, and S3?

Your doubt is quite an interesting one. Yes, ...READ MORE

Jul 30 in Big Data Hadoop by ravikiran
• 4,560 points
417 views
0 votes
1 answer

How to choose number of Executors and Executor cores?

Refer to the below when you are ...READ MORE

Jul 29 in Big Data Hadoop by Veer
98 views
0 votes
1 answer

Error while Loading data to Hive.

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

Jul 29 in Big Data Hadoop by Quill
37 views
0 votes
1 answer

Killing oozie Jobs by userid

Suppose you want to kill the jobs ...READ MORE

Jul 29 in Big Data Hadoop by Esha
26 views
0 votes
1 answer

Difference between put and copyFromLocal

-Put and -copyFromLocal is almost same command ...READ MORE

Jul 29 in Big Data Hadoop by Neeraj
264 views
0 votes
1 answer

Multiple Output format in Hadoop

Each reducer uses an OutputFormat to write ...READ MORE

Jul 26 in Big Data Hadoop by ravikiran
• 4,560 points
68 views
0 votes
1 answer

Does HQL query go to all the nodes to process data?

InputSplits are created by logical division of ...READ MORE

Jul 26 in Big Data Hadoop by Tina
25 views
0 votes
1 answer

Why is Hive called as Data Warehouse?

Hive is a data warehouse infrastructure tool ...READ MORE

Jul 26 in Big Data Hadoop by Joshua
154 views
0 votes
1 answer

Write data into hive table in a parquet

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

Jul 26 in Big Data Hadoop by Sadu
32 views
0 votes
1 answer

Explanation to outputcollector vs context

Both codes contain different API of Map ...READ MORE

Jul 26 in Big Data Hadoop by Rasheed
32 views