How to Install and Configure Apache Hadoop on a Single Node in CentOS 7

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Matei Cezar

I'am a computer addicted guy, a fan of open source and linux based system software, have about 4 years experience with Linux distributions desktop, servers and bash scripting.

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46 Responses

  1. James Ren says:

    dfs.data.dir and dfs.name.dir are wrong.

    It should be:

    dfs.datanode.data.dir
    dfs.namenode.name.dir
    
  2. edwin rincon molina says:

    Hi everybody

    I install the Hadoop but now i try to upload file a get error Permission denied: user=dr.who, access=WRITE, inode=”/”:hadoop:supergroup:drwxr-xr-x

  3. Damini says:

    Following this guide while doing this step – ssh-copy-id master.

    I am getting errors:

    /bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
    /bin/ssh-copy-id: INFO: 1 key(s) remain to be installed — if you are prompted now it is to install the new keys
    ##################################################################################
    NOTE: You have accessed a system owned by FIWARE Lab. You must have authorisation
    before using it, and your use will be strictly limited to that indicated in the
    authorisation.
    Unauthorised access to this system or improper use of the same is prohibited and
    is against the FIWARE Terms & Conditions Policy and the legislation in force. The
    use of this system may be monitored.
    #################################################################################

    Permission denied (publickey,gssapi-keyex,gssapi-with-mic).

    Please help me out.

  4. Roshan Nagpure says:

    I am not able to start yarn, can please help me out here:

    [[email protected] ~]$ start-yarn.sh
    
    starting yarn daemons
    starting resourcemanager, logging to /opt/hadoop/logs/yarn-hadoop-resourcemanager-master.out
    [email protected]'s password: [email protected]'s password: 
    192.168.25.129: starting nodemanager, logging to /opt/hadoop/logs/yarn-hadoop-nodemanager-master.out
    
    
    [email protected]'s password: master.hadoop.com: Permission denied, please try again.
    
    [email protected]'s password: master.hadoop.com: Permission denied, please try again.
    
    master.hadoop.com: Permission denied (publickey,gssapi-keyex,gssapi-with-mic,password).
    

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