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From Andrew Otto <ao...@wikimedia.org>
Subject Re: Decomissioning a broker
Date Tue, 04 Aug 2015 20:27:22 GMT
Thanks!

> In fact if you use a "Controlled Shutdown" migrating the replicas and
> leaders should happen for you as well.

Just to clarify, controlled shutdown will only move the leaders to other replicas, right?
 It won’t actually migrate any replicas elsewhere.

-Ao


> On Aug 4, 2015, at 13:00, Grant Henke <ghenke@cloudera.com> wrote:
> 
> The broker will actually unregister itself from zookeeper. The brokers id
> path uses ephemeral nodes so they are automatically destroyed on shutdown.
> In fact if you use a "Controlled Shutdown" migrating the replicas and
> leaders should happen for you as well. Though, manual reassignment may be
> preferred in your case.
> 
> Here is some extra information on controlled shutdowns:
> http://kafka.apache.org/documentation.html#basic_ops_restarting
> 
> Thanks,
> Grant
> 
> On Thu, Jul 30, 2015 at 4:37 PM, Andrew Otto <aotto@wikimedia.org> wrote:
> 
>> I’m sure this has been asked before, but I can’t seem to find the answer.
>> 
>> I’m planning a Kafka cluster expansion and upgrade to 0.8.2.1.  In doing
>> so, I will be decommissioning a broker.  I plan to remove this broker fully
>> from the cluster, and then reinstall it and use it for a different purpose.
>> 
>> I understand how to use the reassign-partitions tool to generate new
>> partition assignments and to move partitions around so that the target
>> broker no longer has any active replicas.  Once that is done, is there
>> anything special that needs to happen?  I can shutdown the broker, but as
>> far as I know that broker will still be registered in Zookeeper.  Should I
>> just delete the znode for that broker once it has been shut down?
>> 
>> Thanks!
>> -Andrew Otto
>> 
>> 
> 
> 
> -- 
> Grant Henke
> Software Engineer | Cloudera
> grant@cloudera.com | twitter.com/gchenke | linkedin.com/in/granthenke


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