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From Loïc Chanel <loic.cha...@telecomnancy.net>
Subject Re: Clean un-installation via Ambari
Date Thu, 06 Aug 2015 08:35:35 GMT
That's a VERY interesting piece of information. Do you know whether it's
documented or not ? If so, where is it ?
Thanks,


Loïc

Loïc CHANEL
Engineering student at TELECOM Nancy
Trainee at Worldline - Villeurbanne

2015-08-06 10:33 GMT+02:00 Olivier Renault <orenault@hortonworks.com>:

> Sorry I forgot to mention. On each node, you will find a script which
> should clean the nodes for you.
> /usr/lib/python2.6/site-packages/ambari_agent/HostCleanup.py, it will
> generally clean up your cluster
>
> I’ve also notice
> /usr/lib/python2.6/site-packages/ambari_agent/DataCleaner.py
>
> Kind regards,
> Olivier
>
> From: Kaliyug Antagonist
> Reply-To: "user@ambari.apache.org"
> Date: Thursday, 6 August 2015 10:22
> To: "user@ambari.apache.org"
> Subject: Re: Clean un-installation via Ambari
>
> Hi Olivier,
>
> Thanks for the reply.
>
> I had two concerns :
>
>
>    1. As I mentioned, I want to un install the entire cluster which means
>    the 9 nodes where there are datanode directories, nn configs. and
>    previously loaded data(less in size), missing blocks(!) etc. should be
>    cleaned i.e I get back the 9 machines which can now be used for fresh
>    installation of a cluster
>    2. The reset thing will I guess only clear the metadata but the HDFS
>    and other components will remain unchanged - I am not sure if this will
>    solve the problems that I am facing with my existing cluster
>
> Regards !
>
> On Thu, Aug 6, 2015 at 10:12 AM, Olivier Renault <orenault@hortonworks.com
> > wrote:
>
>> Log on your ambari-server bring it down and reset it
>>
>> $ ambari-server stop
>> $ ambari-server reset
>>
>> If you are using postgresql – installed and configured by ambari server,
>> you should be able to restart. If you are using MySQL or Oracle, you will
>> need to drop / re-create the database manually.
>>
>> $ ambari-server setup
>> ….
>>
>> Good luck,
>> Olivier
>>
>> From: Kaliyug Antagonist
>> Reply-To: "user@ambari.apache.org"
>> Date: Thursday, 6 August 2015 10:07
>> To: "user@ambari.apache.org"
>> Subject: Clean un-installation via Ambari
>>
>> I had installed HDP-2.2.4.2-2 using Ambari Version 2.0.0.
>>
>> There have been several issues in the cluster due to misconfiguration in
>> the datanode directories and so on. Now I get several alerts and any MR
>> that I execute fails with an error like this :
>>
>> 15/06/01 13:53:44 INFO mapreduce.Job: Job job_1431689151537_0003 running
>> in uber mode : false
>> 15/06/01 13:53:44 INFO mapreduce.Job: map 0% reduce 0%
>> 15/06/01 13:53:47 INFO mapreduce.Job: Task Id :
>> attempt_1431689151537_0003_m_000000_1000, Status : FAILED
>> java.io.FileNotFoundException: File
>> /opt/dev/sdb/hadoop/yarn/local/filecache does not exist
>>
>> 15/06/01 13:53:51 INFO mapreduce.Job: Task Id :
>> attempt_1431689151537_0003_m_000000_1001, Status : FAILED
>> java.io.FileNotFoundException: File
>> /opt/dev/sdd/hadoop/yarn/local/filecache does not exist
>>
>> 15/06/01 13:53:55 INFO mapreduce.Job: Task Id :
>> attempt_1431689151537_0003_m_000000_1002, Status : FAILED
>> java.io.FileNotFoundException: File
>> /opt/dev/sdh/hadoop/yarn/local/filecache does not exist
>>
>>
>> I wish to clean un install the cluster and reinstall it, it is ok even if
>> Ambari needs to be uninstalled and reinstalled.
>>
>> How can I do it ?
>>
>
>

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