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Questions tagged [hadoop]

Apache Hadoop is a software framework that supports data-intensive distributed applications under a free license. It enables applications to work with thousands of computational independent computers and petabytes of data. Hadoop was derived from Google's MapReduce and Google File System (GFS) papers.

Hadoop is a top-level Apache project being built and used by a global community of contributors, written in the Java programming language. Yahoo! has been the largest contributor to the project, and uses Hadoop extensively across its businesses.

Hadoop was created by Doug Cutting, who named it after his son's toy elephant. It was originally developed to support distribution for the Nutch search engine project.

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207 questions
26
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5 answers

How to install Hadoop?

I am trying to install Hadoop in Ubuntu 12.04 version. Following the instructions from http://michael-noll.com/tutorials/running-hadoop-on-ubuntu-linux-single-node-cluster/, I installed java-6-openjdk from Ubuntu software-center. I have set…
Anitha
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10
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2 answers

"Permission denied" errors whe starting a single node cluster in Hadoop

I'm working in Ubuntu 10.10 and am trying to start a single node cluster in Hadoop. hadoop@abraham-Dimension-3000:/usr/local/hadoop$ bin/start-all.sh mkdir: cannot create directory `/usr/local/hadoop/bin/../logs': Permission denied starting…
ATMathew
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6
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2 answers

hadoop : datanode not running?

I configured and deployed hadoop for single node setup via this tutorial. Everything deployed fine, but when I do jps for have a look on active processes, datanode is not shown. I manually tried to start datanode by going to $HADOOP_HOME/bin :…
ASCIIbetical
  • 897
5
votes
3 answers

I can't connect to Hadoop port 9000

So telnet actually is working, I mean telnet localhost 25 is connecting; but telnet localhost or telnet localhost 9000 got such result: Trying 127.0.0.1... telnet: Unable to connect to remote host: Connection refused nmap results: $ nmap…
DaunnC
  • 153
5
votes
4 answers

Unable to find hadoop-env.sh in hadoop folder

I am trying to install hadoop on Ubuntu 12.04. I followed the following article. http://www.michael-noll.com/tutorials/running-hadoop-on-ubuntu-linux-single-node-cluster/ I have installed hadoop as per the instruction given in this tutorial. I have…
KurioZ7
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4
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4 answers

Not getting `hadoop -version`

I installed Hadoop, but I cannot get its version: ramesh@ramesh-H61M-S2P-B3:~$ echo $HADOOP_HOME /home/hadoop/work/hadoop-1.1.2 ramesh@ramesh-H61M-S2P-B3:~$ hadoop -version hadoop: command not found What do I have to do, to get Hadoop to work?
rams
  • 41
4
votes
4 answers

Namenode format and starting the namenode in hadoop2.2.0

I am trying to install Single node configuration, I succeeded to certain point like downloading and unzipping the tar and editing all the configuration files, but faced problems when formatting the namenode. The errors are: 14/07/14 02:56:40 WARN…
Renukeswar
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4
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2 answers

How to upload and download file in hadoop?

I want to upload and download file in hadoop. and want to store file in server or multi-node cluster.
user11236
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3
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1 answer

echo $HADOOP_HOME is blank

I installed hadoop but when i am using echo $HADOOP_HOME .its showing blank.please help how to check hadoop location.
Veeresh Kumar
  • 31
2
votes
1 answer

namenode not running... i have already tried sudo chown -R username /usr/local/hadoop/ please help

$ /usr/local/hadoop/sbin/start-all.sh This script is Deprecated. Instead use start-dfs.sh and start-yarn.sh Starting namenodes on [localhost] divyeshlad@localhost's password: localhost: starting namenode, logging to…
curious
  • 33
2
votes
3 answers

move files in a hadoop dir with specified number of files

I wish to move files in a hadoop dir in a timely manner. The hadoop dir contains 1000 files with the same extension. I wish to move 100 of them every 10 minutes. I can setup a cron job to move the files every 10 minutes but I don't know how to…
GulshanS
  • 21
2
votes
1 answer

Moving hadoop folder into /usr/local/hadoop

I want to move the Hadoop installation to the /usr/local/hadoop directory, but it says- mv: cannot move ‘/home/pg/Desktop/hadoop-2.7.1’ to ‘/user/local/hadoop’: No such file or directory
pratibha
  • 21
2
votes
1 answer

The node /hbase-unsecure is not in ZooKeeper. Check the value configured in 'zookeeper.znode.parent'

I am getting this error while starting standalone hBase on my ubuntu machine. Please help. Spent a huge amount of time to get it running. :( What I have checked so far - /etc/hosts contains localhost 127.0.0.1 HBase :…
Sankalp
  • 135
1
vote
1 answer

Unexpected Error: Error renaming temporary file, Text File Busy

I've been working on a Ubuntu and Hadoop, I'm at installing and configuring stage. For this I'm following a link: Hadoop Beginner When I am configuring the Hadoop so when I reach to gedit core-site.xml I do the editing and when I save it so it…
user87
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1
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0 answers

Installing OpenTSDB on Ubuntu 14

Can you please guide me for how to install OpenTSDB on ubuntu 14.04? And is hadoop Prerequisite of OpenTSDB?
sohaib1015
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