Questions tagged as 'hadoop'

Tagged questions
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How to resolve the java.lang.NoClassDefFoundError error when running rhinit () on R

I am integrating Hadoop with R using Rhipe and my configuration is as follows: Ubuntu 14. Hadoop 1.0.3 R 3.2.2 Rhipe 0.73.1 When you start in the environment R o rhinit() the following message appe...
asked by 18.01.2016 / 21:20
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Hadoop is a Database? What is Hadoop?

After all, what is Hadoop? Is Hadoop a database? I have often heard "that company uses the Hadoop database". But when I started to study Big Data I saw that things were not really like that. So if it's not a database, what is it?     
asked by 25.08.2017 / 21:33
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Windows 10, Spark error (bin / bin) can not find winutils.exe file

I installed Spark and Hadoop on Windows 10, and I get an error in the path of the winutils.exe file. I already put in the appropriate folder, I already defined the environment variable HADOOP_HOME as C:\hadoop\bin , however i...
asked by 22.11.2016 / 22:54
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Error in Hadoop when searching for Java class

I'm having trouble configuring the Hadoop environment. I'm doing a zero installation on a CentOS 6.7 machine. When attempting to execute any hadoop command, such as: hdfs namenode -format hadoop claspath hadoop version I get the error me...
asked by 07.10.2016 / 20:48
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MapReduce. Does not run the Reduce function correctly

Hello. I'm having a hard time working with MapReduce. Whenever I run the application I can not seem to get results, as the Map function apparently executes, but the Reduce function stays at 0%. When I check the files that were generated on th...
asked by 17.09.2015 / 22:11
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Creating a custom class of type WritableComparator

I'm creating an application to process video in a distributed way in hadoop using the map-reduce paradigm. I have several videos stored in the cluster and I wish from them to create a single video file. To do this, I'm extracting the frames...
asked by 07.08.2017 / 22:13
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Error ORA-01843 when importing table in Sqoop

I'm facing an error from which I can not understand the source. Previously I had imported a table with the same data format, with 54 million lines to the HDFS of my Hadoop cluster . Now I created a _View_ in my database Oracle an...
asked by 16.05.2017 / 22:23
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Different behaviors between beeline and hive-e

In the command execution using the beeline connection always works, however with hive-e it does not work. How it works: beeline -u jdbc:hive2://aaats879454co.sistema.br:10000/sistema tez.queue.name=Desenvolvedores -n usuario01 -e "show data...
asked by 08.09.2017 / 22:24
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How do I add a primary in hive version 0.14.0.2.2.0.0-2041?

How do I add a primary in hive version 0.14.0.2.2.0.0-2041? Attempt CREATE TABLE simple_rule ( simple_rule_id int(10) unsigned default '0' not null auto_increment, condition_analysis_id int(10) unsigned NOT NULL, goal_ana...
asked by 08.08.2017 / 20:42
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With which databases is Apache Atlas compatible?

Apache Atlas has compatibility with which SQL and SQL databases I'm doing a job, and I could not find anything about     
asked by 17.05.2018 / 18:17