Yes I have seen it elected as the leader. The broker process is still up, but due to some unknown hardware failure, it¹s not working 100%. It is, however, able to participate in the cluster, and got itself elected as the leader. I¹m not sure what the hardware problem is though, since I couldn¹t log into the machine to check.
Paul On 6/26/14, 9:03 AM, "Neha Narkhede" <neha.narkh...@gmail.com> wrote: >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 <pl...@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 ³half dead² state. The broker process is up and >> participating in the cluster, but it can¹t actually transmit messages >> properly. Sometimes, even SSH fails on the machines, and we can¹t 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 >>
