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I have version mismatches across my nodes at the moment. I want to remove
the nodes from the cluster and start fresh with a clean installs. How can I
do that?
I don't want to have to format and reinstall CentOS

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  • Jaykay at Mar 18, 2013 at 11:35 am
    Found a doc here:
    https://ccp.cloudera.com/display/FREE45DOC/Uninstalling+Cloudera+Manager+Free+Edition
    Trying it now
    On Monday, March 18, 2013 11:14:23 AM UTC, Jaykay wrote:

    I have version mismatches across my nodes at the moment. I want to remove
    the nodes from the cluster and start fresh with a clean installs. How can I
    do that?
    I don't want to have to format and reinstall CentOS
  • Mark Schnegelberger at Mar 18, 2013 at 2:52 pm
    Hi Jaykay,

    The document you show is for removing Cloudera Manager entirely (which -
    depending on your responses to the removal script - may or may not delete
    the entire Cloudera Manager database). You could instead just remove a host
    from the cluster in the Hosts tab [
    https://ccp.cloudera.com/display/ENT45DOC/Deleting+Hosts], manually return
    it to a fresh state by removing any RPM's for CDH and CM bits, then re-add
    it as a brand new host through the Add Hosts Wizard.

    Thanks,
    --

    On Mon, Mar 18, 2013 at 7:35 AM, Jaykay wrote:

    Found a doc here:
    https://ccp.cloudera.com/display/FREE45DOC/Uninstalling+Cloudera+Manager+Free+Edition
    Trying it now

    On Monday, March 18, 2013 11:14:23 AM UTC, Jaykay wrote:

    I have version mismatches across my nodes at the moment. I want to remove
    the nodes from the cluster and start fresh with a clean installs. How can I
    do that?
    I don't want to have to format and reinstall CentOS
  • Jaykay at Mar 18, 2013 at 4:13 pm
    Thanks.
    I did a full removal of all traces of hadoop. When I was re-adding the
    hosts, I got a message from host inspector to say no route to host for each
    of my data nodes. The services installed anyway, and they started ok. But I
    cant do a test job. I get a message that
    ERROR hdfs.DFSClient: Failed to close file
    /user/hdfs/PiEstimator_TMP_3_141592654/in/part0
    org.apache.hadoop.ipc.RemoteException(java.io.IOException): File
    /user/hdfs/PiEstimator_TMP_3_141592654/in/part0 could only be replicated to
    0 nodes instead of minReplication (=1). There are 3 datanode(s) running
    and 3 node(s) are excluded in this operation.

    Any idea what may be up here?
    IPTables and selinux are off on all hosts.
    On Monday, March 18, 2013 2:52:19 PM UTC, smark wrote:

    Hi Jaykay,

    The document you show is for removing Cloudera Manager entirely (which -
    depending on your responses to the removal script - may or may not delete
    the entire Cloudera Manager database). You could instead just remove a host
    from the cluster in the Hosts tab [
    https://ccp.cloudera.com/display/ENT45DOC/Deleting+Hosts], manually
    return it to a fresh state by removing any RPM's for CDH and CM bits, then
    re-add it as a brand new host through the Add Hosts Wizard.

    Thanks,
    --


    On Mon, Mar 18, 2013 at 7:35 AM, Jaykay <johnk...@gmail.com <javascript:>>wrote:
    Found a doc here:
    https://ccp.cloudera.com/display/FREE45DOC/Uninstalling+Cloudera+Manager+Free+Edition
    Trying it now

    On Monday, March 18, 2013 11:14:23 AM UTC, Jaykay wrote:

    I have version mismatches across my nodes at the moment. I want to
    remove the nodes from the cluster and start fresh with a clean installs.
    How can I do that?
    I don't want to have to format and reinstall CentOS
  • Jaykay at Mar 18, 2013 at 4:27 pm
    Actually, the firewall, selinux and iptables had reset back to being on on
    my Data nodes. Any idea how that could happen?
    On Monday, March 18, 2013 4:13:53 PM UTC, Jaykay wrote:

    Thanks.
    I did a full removal of all traces of hadoop. When I was re-adding the
    hosts, I got a message from host inspector to say no route to host for each
    of my data nodes. The services installed anyway, and they started ok. But I
    cant do a test job. I get a message that
    ERROR hdfs.DFSClient: Failed to close file
    /user/hdfs/PiEstimator_TMP_3_141592654/in/part0
    org.apache.hadoop.ipc.RemoteException(java.io.IOException): File
    /user/hdfs/PiEstimator_TMP_3_141592654/in/part0 could only be replicated to
    0 nodes instead of minReplication (=1). There are 3 datanode(s) running
    and 3 node(s) are excluded in this operation.

    Any idea what may be up here?
    IPTables and selinux are off on all hosts.
    On Monday, March 18, 2013 2:52:19 PM UTC, smark wrote:

    Hi Jaykay,

    The document you show is for removing Cloudera Manager entirely (which -
    depending on your responses to the removal script - may or may not delete
    the entire Cloudera Manager database). You could instead just remove a host
    from the cluster in the Hosts tab [
    https://ccp.cloudera.com/display/ENT45DOC/Deleting+Hosts], manually
    return it to a fresh state by removing any RPM's for CDH and CM bits, then
    re-add it as a brand new host through the Add Hosts Wizard.

    Thanks,
    --

    On Mon, Mar 18, 2013 at 7:35 AM, Jaykay wrote:

    Found a doc here:
    https://ccp.cloudera.com/display/FREE45DOC/Uninstalling+Cloudera+Manager+Free+Edition
    Trying it now

    On Monday, March 18, 2013 11:14:23 AM UTC, Jaykay wrote:

    I have version mismatches across my nodes at the moment. I want to
    remove the nodes from the cluster and start fresh with a clean installs.
    How can I do that?
    I don't want to have to format and reinstall CentOS
  • Mark Schnegelberger at Mar 18, 2013 at 5:00 pm
    Not sure. You'd have to look at that from an OS perspective. However the
    most likely is that If you rebooted the datanodes, they were configured to
    restart iptables and that selinux config may have not been saved.

    Check something like:

    - $ getenforce (to check the SELinux enforcement level)
    - $ chkconfig | grep iptables (to see if configured to start on reboot)
    - If ON, $ chkconfig iptables off all

    Cloudera Manager's Host Inspector will warn of settings like SELinux being
    possible trouble spots, but does not directly control or change those
    settings itself. It reports them so the admin can take action.

    Regards,
    --

    On Mon, Mar 18, 2013 at 12:27 PM, Jaykay wrote:

    Actually, the firewall, selinux and iptables had reset back to being on on
    my Data nodes. Any idea how that could happen?
    On Monday, March 18, 2013 4:13:53 PM UTC, Jaykay wrote:

    Thanks.
    I did a full removal of all traces of hadoop. When I was re-adding the
    hosts, I got a message from host inspector to say no route to host for each
    of my data nodes. The services installed anyway, and they started ok. But I
    cant do a test job. I get a message that
    ERROR hdfs.DFSClient: Failed to close file /user/hdfs/PiEstimator_TMP_3_*
    *141592654/in/part0 org.apache.hadoop.ipc.**RemoteException(java.io.**IOException):
    File /user/hdfs/PiEstimator_TMP_3_**141592654/in/part0 could only be
    replicated to 0 nodes instead of minReplication (=1). There are 3
    datanode(s) running and 3 node(s) are excluded in this operation.

    Any idea what may be up here?
    IPTables and selinux are off on all hosts.
    On Monday, March 18, 2013 2:52:19 PM UTC, smark wrote:

    Hi Jaykay,

    The document you show is for removing Cloudera Manager entirely (which -
    depending on your responses to the removal script - may or may not delete
    the entire Cloudera Manager database). You could instead just remove a host
    from the cluster in the Hosts tab [https://ccp.cloudera.com/**
    display/ENT45DOC/Deleting+**Hosts<https://ccp.cloudera.com/display/ENT45DOC/Deleting+Hosts>],
    manually return it to a fresh state by removing any RPM's for CDH and CM
    bits, then re-add it as a brand new host through the Add Hosts Wizard.

    Thanks,
    --

    On Mon, Mar 18, 2013 at 7:35 AM, Jaykay wrote:

    Found a doc here: https://ccp.cloudera.com/**display/FREE45DOC/**
    Uninstalling+Cloudera+Manager+**Free+Edition<https://ccp.cloudera.com/display/FREE45DOC/Uninstalling+Cloudera+Manager+Free+Edition>
    Trying it now

    On Monday, March 18, 2013 11:14:23 AM UTC, Jaykay wrote:

    I have version mismatches across my nodes at the moment. I want to
    remove the nodes from the cluster and start fresh with a clean installs.
    How can I do that?
    I don't want to have to format and reinstall CentOS

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postedMar 18, '13 at 11:14a
activeMar 18, '13 at 5:00p
posts6
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websitecloudera.com
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Jaykay: 4 posts Mark Schnegelberger: 2 posts

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