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From Mahadev Konar <maha...@yahoo-inc.com>
Subject Re: Misbehaving zk servers
Date Thu, 29 Apr 2010 16:34:30 GMT
Hi Travis,

 How many clients did you have connected to this server? Usually the default
is 8K file descriptors. Did you have clients more than that?

Also, if clients fail to attach to a server, they will run off to another
server. We do not do any blacklisting because we expect the server to heal
and if it does not, it mostly shuts itself down in most of the cases.


On 4/29/10 12:08 AM, "Travis Crawford" <traviscrawford@gmail.com> wrote:

> Hey zookeeper gurus -
> We recently had a zookeeper outage when one ZK server was started with
> a low limit after upgrading to 3.3.0. Several days later the outage
> occurred when that node reached its file descriptor limit and clients
> started having major issues.
> Are there any circumstances when a ZK server will get blacklisted from
> the ensemble? Something similar to how tasktrackers are blacklisted
> when too many tasks fail.
> Thanks!
> Travis

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