Trending questions in Big Data Hadoop

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How to check if a particular partition exists in Hive?

Hey, Basically, with the following query, we can ...READ MORE

Jun 26, 2019 in Big Data Hadoop by Gitika
• 65,850 points
7,211 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
5,560 views
+2 votes
0 answers
+1 vote
1 answer

datanode decomissioning

You have set the replication factor to ...READ MORE

Nov 28, 2019 in Big Data Hadoop by Rahul
286 views
0 votes
1 answer

What is the main purpose of HDFS fsck command?

HDFS fsck is used to check the ...READ MORE

Apr 10, 2019 in Big Data Hadoop by Gitika
• 65,850 points

edited Apr 12, 2019 by Gitika 10,270 views
0 votes
1 answer

ERROR 1044 (42000): Access denied for user ''@'localhost' to database 'oozie'

Hey, I got the same error and it ...READ MORE

Jun 19, 2019 in Big Data Hadoop by Gitika
• 65,850 points
7,142 views
+1 vote
1 answer

http://localhost:50070 not working in HADOOP

There are 2 case possible: 1. If you ...READ MORE

Apr 16, 2018 in Big Data Hadoop by nitinrawat895
• 11,380 points
25,626 views
0 votes
1 answer

How to install Hive on Windows Operating System?

First, download Hive from the following link: http://www.apache.org/dyn/closer.cgi/hive/ Next, ...READ MORE

Feb 27, 2019 in Big Data Hadoop by Kirti
11,930 views
+1 vote
1 answer

flume twitter data file not generated in HDFS

Seems like you've missed the source and ...READ MORE

Dec 2, 2019 in Big Data Hadoop by Esha
1,255 views
0 votes
1 answer

Error: org.apache.thrift.transport.TTransportException (state=08S01,code=0)

This error usually occurs when the HiveServer2 ...READ MORE

Jun 4, 2019 in Big Data Hadoop by Ram
7,651 views
0 votes
1 answer

How does data gets split in Sqoop?

I will drop the answer in the ...READ MORE

Jul 16, 2019 in Big Data Hadoop by ravikiran
• 4,620 points
5,706 views
+1 vote
0 answers

Oozie filter all coordinator jobs based on nominalTime

Hi Edureka team. I would like to ...READ MORE

Nov 12, 2019 in Big Data Hadoop by Thayanban
• 130 points
565 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
4,883 views
0 votes
3 answers

Sqoop: java.lang.RuntimeException: Could not load db driver class: com.mysql.jdbc.Driver

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

Mar 1, 2020 in Big Data Hadoop by Manh Quang
• 180 points
4,205 views
0 votes
1 answer

Hive: Assign subquery to variable

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

Jul 30, 2019 in Big Data Hadoop by Tina
4,875 views
0 votes
2 answers

Hive update and delete limitations

Vinyl-like crackle sounds. And what is my ...READ MORE

May 3, 2020 in Big Data Hadoop by Carter
• 140 points
3,310 views
+1 vote
2 answers

Hadoop Hive: Not recognizing alias named in select part?

You can not use column aliases in ...READ MORE

Nov 26, 2019 in Big Data Hadoop by anonymous
7,741 views
+1 vote
2 answers

How to find the database daily refresh time / sync up time

I use this code to get the ...READ MORE

Sep 17, 2019 in Big Data Hadoop by Raman
2,465 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 4,599 views
+1 vote
1 answer

bash: sbin/hadoop: No such file or directory

The hadoop command is not present in ...READ MORE

Sep 18, 2019 in Big Data Hadoop by Omkar
• 69,210 points
2,439 views
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, 2019 in Big Data Hadoop by ravikiran
• 4,620 points
4,514 views
0 votes
1 answer

How to replace characters in string in hive?

You can do it using regexp_replace. This is ...READ MORE

Nov 30, 2018 in Big Data Hadoop by Omkar
• 69,210 points
14,961 views
0 votes
1 answer

How to import data in sqoop as a Parquet file?

Sqoop allows you to import the file ...READ MORE

May 15, 2019 in Big Data Hadoop by Nanda
7,640 views
+1 vote
1 answer

" org.apache.hadoop.yarn.exceptions.YarnRuntimeException: Permissions incorrectly set for dir " problem

This error is caused when hadoop tries ...READ MORE

Sep 9, 2019 in Big Data Hadoop by Kumar
2,533 views
0 votes
11 answers

What is the command to start Job history server in Hadoop 2.x & how to get its UI?

mr-jobhistory-daemon. sh start historyserver READ MORE

Jul 24, 2019 in Big Data Hadoop by Lokesh Singh
14,150 views
0 votes
1 answer

Read Parquet file using hdfs dfs -cat command

When you try to read a parquet ...READ MORE

May 24, 2019 in Big Data Hadoop by Calvin
6,970 views
0 votes
7 answers

How to run a jar file in hadoop?

I used this command to run my ...READ MORE

Dec 10, 2018 in Big Data Hadoop by Dasinto
19,258 views
+2 votes
5 answers

How to transpose/pivot data in hive?

Below is also a way for Pivot SELECT ...READ MORE

Oct 12, 2018 in Big Data Hadoop by Rahul
16,472 views
0 votes
1 answer

How to count lines in a file on hdfs command?

Use the below commands: Total number of files: hadoop ...READ MORE

Aug 10, 2018 in Big Data Hadoop by Neha
• 6,300 points
19,126 views
0 votes
1 answer

Difference between Cluster and nodes?

In Hadoop distributed system, Node is a single ...READ MORE

Apr 9, 2019 in Big Data Hadoop by Gitika
• 65,850 points
8,612 views
0 votes
1 answer

Warning: Unable to load Hadoop Native Library for your platform. [closed]

 I had the same issue. It's solved ...READ MORE

Jun 28, 2019 in Big Data Hadoop by ravikiran
• 4,620 points
5,109 views
0 votes
2 answers

Function of “hadoop namenode -format” command

Namenode is the node in the Hadoop ...READ MORE

Feb 4, 2019 in Big Data Hadoop by Kanika
17,565 views
0 votes
1 answer

How to convert a string to timestamp with milliseconds in Hive?

 concatenation of substrings using the following code: select ...READ MORE

Oct 31, 2018 in Big Data Hadoop by Neha
• 6,300 points
15,238 views
0 votes
1 answer

Why is Hive called as Data Warehouse?

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

Jul 26, 2019 in Big Data Hadoop by Joshua
3,650 views
0 votes
1 answer

How to see the version of Zookeeper I am running?

Hey, First, you need to have a running ...READ MORE

May 31, 2019 in Big Data Hadoop by Gitika
• 65,850 points
6,058 views
0 votes
1 answer

How can we use IN/EXIST operator in Hive?

Hey, Yes, now Hive supports IN or EXIST, ...READ MORE

Jun 19, 2019 in Big Data Hadoop by Gitika
• 65,850 points
5,222 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
3,391 views
+1 vote
0 answers

Class not found exception in wordcount program in mapreduce

import org.apache.hadoop.conf.Configuration; import org.apache.hadoop.fs.Path; import java.io.IOException; import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat; import org.apache.hadoop.mapreduce.*; import org.apache.hadoop.mapreduce.lib.input.FileInputFormat; import ...READ MORE

Oct 3, 2019 in Big Data Hadoop by Tarun
• 160 points

edited Oct 3, 2019 by Omkar 572 views
0 votes
1 answer

Error: Container is running beyond Memory Limits

I had a similar problem while I was working ...READ MORE

Jun 20, 2019 in Big Data Hadoop by ravikiran
• 4,620 points
5,064 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
2,875 views
0 votes
1 answer

Can I run Hadoop with Docker for both DEV and PROD environments?

Hi, Yes, you can run Hadoop with Docker ...READ MORE

Jan 24, 2020 in Big Data Hadoop by MD
• 95,360 points
182 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
3,194 views
+1 vote
1 answer

2 datanodes is slower ,how to get those details .what is your approach as hadoop admin

First, enable the detection of slow nodes. ...READ MORE

Sep 23, 2019 in Big Data Hadoop by Riya
814 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
2,733 views
0 votes
1 answer

why do we need MaPReduce in BigData Hadoop?

Hi, As we know Hadoop provides Hdfs as ...READ MORE

Feb 4, 2020 in Big Data Hadoop by MD
• 95,360 points
287 views
0 votes
1 answer

How to remove a Znode in Zookeeper?

Hey, Removes a specified znode and recursively all ...READ MORE

May 28, 2019 in Big Data Hadoop by Gitika
• 65,850 points
5,835 views
+1 vote
1 answer

Namenode v/s Secondary namenode

Name Node is a primary node in ...READ MORE

Sep 9, 2019 in Big Data Hadoop by ravikiran
• 4,620 points
1,285 views
0 votes
1 answer

Bucketing vs Partitioning in HIve

Partition divides large amount of data into ...READ MORE

Jul 9, 2018 in Big Data Hadoop by Data_Nerd
• 2,390 points
19,687 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
1,067 views
0 votes
2 answers

How can I list NameNode & DataNodes from any machine in the Hadoop cluster?

You can browse hadoop page from any ...READ MORE

Jan 23, 2020 in Big Data Hadoop by MD
• 95,360 points
9,146 views