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From Dima Spivak <d...@spivak.ch>
Subject Re: Renaming hosts in Accumulo cluster?
Date Fri, 02 Sep 2016 00:04:31 GMT
As is the norm, you da man, Josh. Looks like this should do exactly what
I'm going for.

-Dima

On Thu, Sep 1, 2016 at 3:04 PM, Josh Elser <josh.elser@gmail.com> wrote:

> Hi Dima,
>
> This really comes down to the Namenode's FQDN being renamed, not the rest
> of the Accumulo nodes.
>
> Accumulo stores full URI's to files (e.g. hdfs://nn:8020/accumulo/../foo.rf)
> which is why this is an issue. Suddenly, Accumulo can't find any of the
> files in HDFS.
>
> You can use instance.volumes.replacements in accumulo-site.xml to handle
> the rename automatically. http://accumulo.apache.org/1.7
> /accumulo_user_manual#_migrating_accumulo_from_non_ha_
> namenode_to_ha_namenode has a concrete example of this in practice
> (moving from a single NN to a HA nameservice).
>
> - Josh
>
>
> Dima Spivak wrote:
>
>> Hi all,
>>
>> I recently had a situation where I had to change the domain of the
>> machines running an Accumulo cluster, and learned the hard way that
>> Accumulo doesn't like that. In particular, I began getting
>> UnknownHostExceptions on the master with messages complaining about not
>> being able to process "table state for store Root Table."
>>
>> Anyone happen to know of a tool or even just some commands I'd need to
>> run to tell the cluster that the hostnames it had before are different
>> now and to stop being so unhappy? :)
>>
>> -Dima
>>
>

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