Recent questions tagged big-data

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Hadoop single node cluster set up issues

Apr 19, 2018 in Big Data Hadoop by Ashish
 • 2,650 points • 1,275 views
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Why Hadoop is tightly bound to linux?

Apr 19, 2018 in Big Data Hadoop by Ashish
 • 2,650 points • 1,019 views
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How to upload file to HDFS in Ubuntu

Apr 19, 2018 in Big Data Hadoop by Ashish
 • 2,650 points • 2,072 views
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1 answer

Map and Reduce task memory settings in Hadoop YARN

Apr 18, 2018 in Big Data Hadoop by Ashish
 • 2,650 points • 1,487 views
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Hadoop for data migration

Apr 18, 2018 in Big Data Hadoop by Ashish
 • 2,650 points • 1,586 views
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1 answer

How to set the number of Map & Reduce tasks?

Apr 18, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 2,318 views
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1 answer

Setting Hive/Hadoop property using Hive Query

Apr 18, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 2,375 views
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1 answer

Getting error in Hadoop Streaming: Type mismatch in Key from Map

Apr 18, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 1,612 views
0 votes
1 answer

Replication Factor in Hadoop?

Apr 18, 2018 in Big Data Hadoop by Ashish
 • 2,650 points • 1,562 views
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1 answer

How can I use my host machine’s web browser to check my HDFS services running in the VM?

Apr 18, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 1,946 views
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1 answer

What are the different ways to load data from Hadoop to Azure Data Lake?

Apr 18, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 1,381 views
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1 answer

How to tune Spark jobs & optimize the performance?

Apr 18, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 2,180 views
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2 answers

Hadoop is not able to find jps command

Apr 18, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 17,623 views
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1 answer

Why am I not able to see the Hadoop daemons that are running?

Apr 18, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 1,410 views
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2 answers

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

Apr 18, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 12,095 views
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1 answer

can't find start-all.sh in hadoop installation

Apr 17, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 9,269 views
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1 answer

Not able to find HDFS directory on my system?

Apr 17, 2018 in Big Data Hadoop by coldcode
 • 2,090 points • 8,140 views
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In which directory Hadoop should be installed?

Apr 17, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 1,745 views
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2 answers

How to exit NameNode safe mode?

Apr 17, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 4,481 views
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1 answer

Is there any way to write "map only" Hadoop jobs ?

Apr 16, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 1,321 views
+1 vote
1 answer

http://localhost:50070 not working in HADOOP

Apr 16, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 43,984 views
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2 answers

Meaning of fs.defaultFS property in core-site.xml in hadoop

Apr 15, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 8,770 views
0 votes
2 answers

Function of “hadoop namenode -format” command

Apr 15, 2018 in Big Data Hadoop by coldcode
 • 2,090 points • 22,143 views
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1 answer

Is there a way to rebalance single Datanode in Hadoop.

Apr 15, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 1,174 views
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1 answer

Moving files in Hadoop using the Java API?

Apr 15, 2018 in Big Data Hadoop by coldcode
 • 2,090 points • 3,009 views
0 votes
1 answer

Deleting a directory with comma throwing an error

Apr 15, 2018 in Big Data Hadoop by coldcode
 • 2,090 points • 773 views
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11 answers

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

Apr 15, 2018 in Big Data Hadoop by coldcode
 • 2,090 points • 22,264 views
0 votes
1 answer

Hadoop query regarding setJarByClass method of Job class

Apr 15, 2018 in Big Data Hadoop by coldcode
 • 2,090 points • 2,775 views
0 votes
1 answer

Best way of starting & stopping the Hadoop daemons with command line

Apr 15, 2018 in Big Data Hadoop by coldcode
 • 2,090 points • 10,976 views
0 votes
1 answer

Files for Configuring HDFS in Hadoop 2.2.0?

Apr 15, 2018 in Big Data Hadoop by coldcode
 • 2,090 points • 1,125 views
0 votes
1 answer

Getting error in MapReduce job.setInputFormatClass

Apr 15, 2018 in Big Data Hadoop by coldcode
 • 2,090 points • 2,355 views
0 votes
2 answers

start-dfs.sh command is not starting Hadoop JobTracker & TaskTracker

Apr 15, 2018 in Big Data Hadoop by coldcode
 • 2,090 points • 4,416 views
0 votes
2 answers

Command to check the Hadoop distribution as well as it’s version which is installed in my cluster

Apr 15, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 6,012 views
0 votes
1 answer

Getting error in command hdfs dfs -mkdir

Apr 15, 2018 in Big Data Hadoop by coldcode
 • 2,090 points • 3,824 views
0 votes
1 answer

I am getting error while starting the Hadoop Daemons i.e. ResourceManger & NodeManager in Hadoop 3

Apr 15, 2018 in Big Data Hadoop by coldcode
 • 2,090 points • 4,093 views
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1 answer

Why Java Code in Hadoop uses own Data Types instead of basic Data types?

Apr 15, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 1,444 views
0 votes
1 answer

How to migrate/ change Hadoop 1.x maven project to Hadoop 2.x?

Apr 15, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 1,461 views
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1 answer

Why ResourceManager crashes after sometime or while accessing HDFS in Hadoop 2.8.1 and Ubuntu 16.04?

Apr 15, 2018 in Big Data Hadoop by coldcode
 • 2,090 points • 1,825 views
0 votes
1 answer

How do I connect my Spark based HDInsight cluster to my blob storage?

Apr 15, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 2,382 views
0 votes
1 answer

What are the various ways to import files into HDFS?

Apr 13, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 4,052 views
0 votes
1 answer

How can we transfer a PDF file to HDFS?

Apr 13, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 1,627 views
0 votes
1 answer

What are SUCCESS and part-r-00000 files in Hadoop?

Apr 12, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 13,247 views
0 votes
1 answer

Is there any way to increase Java Heap size in Hadoop?

Apr 12, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 5,431 views
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12 answers

What is Zookeeper? What is the purpose of Zookeeper in Hadoop Ecosystem?

Apr 12, 2018 in Big Data Hadoop by kurt_cobain
 • 9,350 points • 31,292 views
0 votes
1 answer

How to move data from Oracle database to Hadoop?

Apr 12, 2018 in Big Data Hadoop by Shubham
 • 13,490 points • 7,790 views
0 votes
1 answer

Is Hadoop a good open-source project to join?

Apr 12, 2018 in Big Data Hadoop by Ashish
 • 2,650 points • 1,153 views
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1 answer

Is java necessary for Hadoop?

Apr 11, 2018 in Big Data Hadoop by Ashish
 • 2,650 points • 1,110 views
0 votes
1 answer

How do I parse pdf file using MapReduce?

Apr 11, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 2,063 views
+1 vote
2 answers

How to authenticate username & password while using Connector for Cloudera Hadoop in Tableau?

Apr 11, 2018 in Big Data Hadoop by nitinrawat895
 • 11,380 points • 2,136 views
0 votes
1 answer

What is the difference between a zero reducer and identity reducer in Hadoop Mapreduce?

Apr 10, 2018 in Big Data Hadoop by Ashish
 • 2,650 points • 2,976 views
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