Most voted "hadoop" questions
Use this tag when the question involves distributed computing (processing, queries, data ingestion) using the Hadoop ecosystem.
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8
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answer489
viewsHow to resolve java.lang.Noclassdeffounderror when running rhinit() in R
I’m integrating the 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 starting in the environment R the rhinit() the following message…
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answers4353
viewsHadoop is a Database? What is Hadoop?
After all, what is Hadoop? Hadoop is a database? I have often heard "that company uses the Hadoop database". But when I started studying Big Data I saw that actually things weren’t quite like that.…
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answers56
viewsMapreduce. Does not perform Reduce function correctly
Hello. I’m having a hard time working with Mapreduce. Whenever I run the application I get no result, because apparently the Map function runs, but the Reduce function remains at 0%. When I check…
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answers99
viewsDifferent behaviors between Ine and Ive-e
In command execution using Beeline connection always works, but with Hive-e it does not work. That’s how it works: beeline -u jdbc:hive2://aaats879454co.sistema.br:10000/sistema…
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answer162
viewsHadoop error while searching for Java class
I’m having trouble setting up the Hadoop environment. I’m doing a zero installation on a Centos 6.7 machine. When trying to execute any Hadoop command, for example: hdfs namenode -format hadoop…
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answer122
viewsWindows 10 , Spark error (bin/bin) does not find winutils.exe file
I installed Spark and Hadoop on Windows 10, and I have an error in the file path winutils.exe. I have already put in the appropriate folder, already set the environment variable HADOOP_HOME as…
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answer236
viewsSeek Time vs Transfer Rate
I was reading a bit about the Hadoop tool for big data and came across the terms Seek Time and Transfer Rate. I found definitions like Seek Time is the delay to find a specific file/data and…
hadoopasked 4 years, 5 months ago luizricardo6n 333 -
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answer55
viewsHow do I add a Primary in Hive version 0.14.0.2.0.0-2041?
How to add a Primary in Hive version 0.14.0.2.0.0-2041 ? Trying CREATE TABLE simple_rule ( simple_rule_id int(10) unsigned default '0' not null auto_increment, condition_analysis_id int(10) unsigned…
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answer78
viewsORA-01843 error when importing table in Sqoop
I’m facing a mistake that I can’t understand the origin of. Previously I had imported a table with the same data format, with 54 million lines to my HDFS cluster hadoop. Now I’ve created a _View_ in…
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answers36
viewsCreating a custom Writablecomparator class
I’m creating an application to process distributed video in Hadoop using the paradigm map-reduce. I have several videos stored in the cluster and wish from them to create a single video file. For…
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answer40
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answers23
viewsSQL - Managed Table vs External Table
I bring a less technical SQL question. I use Hadoop’s Hive tool to manipulate the data with SQL. And I would like to know a real situation where I should apply a Managed table and a External table.…
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answer39
viewsWhat exactly is HDFS
Good morning, I am studying about Hadoop and a question arose me, for example if you talk a lot about HDFS (Hadoop Distributed File System), which would be the file store of Hadoop, my question is…
hadoopasked 4 years, 10 months ago Ricardo Campos 3 -
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answer167
viewsWhat databases is Apache Atlas compatible with?
apache Atlas supports which SQL and noSQL databases I’m doing a job, and I couldn’t find anything on