FAQ
Hi:

I'm running Cloudera Manager 4.5 and I have a node that refuses to be
deleted. This host was out-of-service for some time, and it recently came
back.

The host status indicated it has no roles allocated. If I try to 'Remove
Host from Cluster', I get

The following 1 host(s) cannot be removed from their cluster because they
have role instances or do not belong to a cluster:

but the cluster and role values are empty!

If I go to the services tab (HDFS, MapReduce) to try to add a role to it,
it doesn't show up on the list. So it looks like a zombie host, it can't be
used and it can't be killed.

My intention is to put the server back into service, so I can try to delete
it and re-add it, or assign a role to it. None of them works at the moment.

Any suggestions how to continue with this? I've been restraining myself
from hack into the database to avoid breaking things.


Kind Regards,
Sebastian

Search Discussions

  • Herman Chen at Mar 7, 2013 at 11:40 pm
    Hi Sebastian

    It sounds like the host already does not belong to any cluster. If you
    check its Cluster column in the Hosts page, it should be blank. In
    order to assign roles to it, you should use the "Add New Hosts to
    Cluster" wizard and find the host under "Currently Managed Hosts" tab,
    which will add the host to the cluster without performing
    installations again.

    Herman

    On Thu, Mar 7, 2013 at 3:03 PM, Sebastian Castro
    wrote:
    Hi:

    I'm running Cloudera Manager 4.5 and I have a node that refuses to be
    deleted. This host was out-of-service for some time, and it recently came
    back.

    The host status indicated it has no roles allocated. If I try to 'Remove
    Host from Cluster', I get

    The following 1 host(s) cannot be removed from their cluster because they
    have role instances or do not belong to a cluster:

    but the cluster and role values are empty!

    If I go to the services tab (HDFS, MapReduce) to try to add a role to it, it
    doesn't show up on the list. So it looks like a zombie host, it can't be
    used and it can't be killed.

    My intention is to put the server back into service, so I can try to delete
    it and re-add it, or assign a role to it. None of them works at the moment.

    Any suggestions how to continue with this? I've been restraining myself from
    hack into the database to avoid breaking things.


    Kind Regards,
    Sebastian
  • Sebastian Castro at Mar 8, 2013 at 12:21 am

    On Friday, March 8, 2013 12:40:16 PM UTC+13, Herman Chen wrote:

    Hi Sebastian
    Hi Herman,

    It sounds like the host already does not belong to any cluster. If you
    check its Cluster column in the Hosts page, it should be blank. In
    order to assign roles to it, you should use the "Add New Hosts to
    Cluster" wizard and find the host under "Currently Managed Hosts" tab,
    which will add the host to the cluster without performing
    installations again.
    Thanks for your help, that's an interesting change to the interface. I've
    done some deletions and re-adding in the past, with 4.1 and 4.2 manager.

    Cheers,

    Herman

    On Thu, Mar 7, 2013 at 3:03 PM, Sebastian Castro
    <sebastia...@gmail.com <javascript:>> wrote:
    Hi:

    I'm running Cloudera Manager 4.5 and I have a node that refuses to be
    deleted. This host was out-of-service for some time, and it recently came
    back.

    The host status indicated it has no roles allocated. If I try to 'Remove
    Host from Cluster', I get

    The following 1 host(s) cannot be removed from their cluster because they
    have role instances or do not belong to a cluster:

    but the cluster and role values are empty!

    If I go to the services tab (HDFS, MapReduce) to try to add a role to it, it
    doesn't show up on the list. So it looks like a zombie host, it can't be
    used and it can't be killed.

    My intention is to put the server back into service, so I can try to delete
    it and re-add it, or assign a role to it. None of them works at the moment.
    Any suggestions how to continue with this? I've been restraining myself from
    hack into the database to avoid breaking things.


    Kind Regards,
    Sebastian

Related Discussions

Discussion Navigation
viewthread | post
Discussion Overview
groupscm-users @
categorieshadoop
postedMar 7, '13 at 11:03p
activeMar 8, '13 at 12:21a
posts3
users2
websitecloudera.com
irc#hadoop

2 users in discussion

Sebastian Castro: 2 posts Herman Chen: 1 post

People

Translate

site design / logo © 2022 Grokbase