FAQ
Hi ,

We have 5 node hadoop (CDH 4.6.0) cluster created using Cloudera
Manager(4.8.0), because of some networking issues on our OpenStack cloud
Cloudera Manager VM got crashed.
Now I have created new VM for Cloudera Manager. After pointing VMs having
existing hadoop cluster to new Cloudera Manager, these VMs are showing as
managed hosts in CM.

However when I check for the HDFS service, it is not running on any node.

How to make Cloudera manager manage Hadoop Cluster and make sure that data
is HDFS is not lost ?

Any help is greatly appreciated.


Thanks
Abhijeet


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  • Darren Lo at May 9, 2014 at 2:34 pm
    You'll basically need to re-create the cluster in Cloudera Manager with the
    same configuration as what you had before. CM won't delete any of your
    data, so it should be possible to recover everything you had before (other
    than whatever was stored on the host that died, of course). If you used the
    default locations of all data dirs, this should be pretty straightforward.
    Hopefully your oozie / hive / hue / etc databases weren't on the host that
    died, as those will be more irritating to recreate.

    Remember to take regular database backups of your databases, especially if
    you're running on flaky machines.

    On Thu, May 8, 2014 at 10:05 PM, wrote:

    Hi ,

    We have 5 node hadoop (CDH 4.6.0) cluster created using Cloudera
    Manager(4.8.0), because of some networking issues on our OpenStack cloud
    Cloudera Manager VM got crashed.
    Now I have created new VM for Cloudera Manager. After pointing VMs having
    existing hadoop cluster to new Cloudera Manager, these VMs are showing as
    managed hosts in CM.

    However when I check for the HDFS service, it is not running on any node.

    How to make Cloudera manager manage Hadoop Cluster and make sure that data
    is HDFS is not lost ?

    Any help is greatly appreciated.


    Thanks
    Abhijeet


    To unsubscribe from this group and stop receiving emails from it, send an
    email to scm-users+unsubscribe@cloudera.org.
    To unsubscribe from this group and stop receiving emails from it, send an email to scm-users+unsubscribe@cloudera.org.
  • Darren Lo at May 12, 2014 at 5:39 pm
    Glad it worked out!


    On Sun, May 11, 2014 at 11:07 PM, Abhijeet Shipure
    wrote:
    Hi Darren,

    Thanks for replying.
    Yes, Cloudera Manager was able to recover HDFS without loosing any files.
    I created HDFS and other services using same configuration as earlier. This
    worked and HDFS has not lost any data.

    Regards
    Abhijeet

    On Fri, May 9, 2014 at 8:04 PM, Darren Lo wrote:

    You'll basically need to re-create the cluster in Cloudera Manager with
    the same configuration as what you had before. CM won't delete any of your
    data, so it should be possible to recover everything you had before (other
    than whatever was stored on the host that died, of course). If you used the
    default locations of all data dirs, this should be pretty straightforward.
    Hopefully your oozie / hive / hue / etc databases weren't on the host that
    died, as those will be more irritating to recreate.

    Remember to take regular database backups of your databases, especially
    if you're running on flaky machines.

    On Thu, May 8, 2014 at 10:05 PM, wrote:

    Hi ,

    We have 5 node hadoop (CDH 4.6.0) cluster created using Cloudera
    Manager(4.8.0), because of some networking issues on our OpenStack cloud
    Cloudera Manager VM got crashed.
    Now I have created new VM for Cloudera Manager. After pointing VMs
    having existing hadoop cluster to new Cloudera Manager, these VMs are
    showing as managed hosts in CM.

    However when I check for the HDFS service, it is not running on any node.

    How to make Cloudera manager manage Hadoop Cluster and make sure that
    data is HDFS is not lost ?

    Any help is greatly appreciated.


    Thanks
    Abhijeet


    To unsubscribe from this group and stop receiving emails from it, send
    an email to scm-users+unsubscribe@cloudera.org.
    To unsubscribe from this group and stop receiving emails from it, send an email to scm-users+unsubscribe@cloudera.org.

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postedMay 9, '14 at 5:05a
activeMay 12, '14 at 5:39p
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Darren Lo: 2 posts Abhi Shipure: 1 post

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