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HDP on Linux – Installation Forum


  • #10506
    vik onto

    I finally install HDP on singel machine
    But I can not start HDFS
    Falls on
    2012-10-03 19:42:02,181 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: org.apache.hadoop.ipc.RemoteException: org.apache.hadoop.hdfs.server.protocol.DisallowedDatanodeException: Datanode denied communication with namenode: 50010

    How can I overcome it, help please.

  • Author
  • #10508
    Sasha J

    Hi Vik,
    After the install did you shut down the box? If you simply shut down the box without stopping the services first, the HMC dashboard will get out of sync. How are you trying to start HDFS, via the HMC?

    Sasha J

    Hi Vik,
    Just to also add, this exception indicates communication from namenode to datanode was denied and is most likely due to firewalls blocking or selinux enabled, hence make sure to check on those. A list of ports used by hadoop can be found in our documentation here:


    vik onto

    Hi Sasha!
    thank you for you response.
    I didn’t shut down the machine after installation.
    I cann’t start HDFS via HMC becouse I also have a problem with HMC, but it’s something else,,,
    ( i get * RRDs directory ‘/var/lib/ganglia/rrds’ is not readable. Please adjust $conf[‘rrds’]. in /var/www/html/ganglia/eval_conf.php on line 81 ).
    and i check all port, everything looked fine, but datanode still not start
    : (

    vik onto

    I stop the firewall and datanote start!!!!!!!!!!
    thank you very much!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

    vik onto

    datanote stoped and still get
    DisallowedDatanodeException: Datanode denied communication with namenode:

    vik onto

    Hi Sasha!
    I run gsInstall shells on redhat 6.
    I run all scripts with user root
    may be all my problems because this?

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