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From Neha Narkhede <neha.narkh...@gmail.com>
Subject Re: Blacklisting Brokers
Date Thu, 26 Jun 2014 16:03:56 GMT
If ssh fails on the broker machine, I'm not why the broker would be in a
state where it maintains it's registration in zookeeper? If so, it will
automatically be marked dead and will not get elected as the leader. Have
you seen a case where such a broker became the leader? Could you elaborate
more on the type of failure that you describe?

On Tue, Jun 24, 2014 at 6:20 PM, Lung, Paul <plung@ebay.com> wrote:

> Hi All,
> Is there anyway to blacklist brokers? Sometimes we run into situations
> where there are certain hardware failures on a broker machine, and the
> machines goes into a “half dead” state. The broker process is up and
> participating in the cluster, but it can’t actually transmit messages
> properly. Sometimes, even SSH fails on the machines, and we can’t log in to
> shutdown the broker process. The only way to resolve this issue at this
> point is to shutdown the machine, which is not always easy in a large data
> center scenario. The consequences are disastrous if this half dead broker
> is elected as the leader. So in this situation, it would be nice to be able
> to quickly black list a broker.
> Thank you.
> Paul Lung

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