Interesting. I haven't had the chance to dive into the zkclient codebase to understand the root cause yet, but since you mentioned this can cause ephemeral node loss, I am curious to know how you detected the ephemeral node loss. Did the Kafka consumer not respond to rebalance events or did the server not respond to state change events ? Also, ephemeral nodes are lost only when sessions are expired on the zookeeper server or if clients close the session actively, how does losing connection lead to ephemeral node loss?
Thanks, Neha On Mon, Sep 23, 2013 at 7:02 AM, Anatoly Fayngelerin <fanat...@gmail.com>wrote: > Hi Everyone, > > I've run into the following issue with the Kafka server. The zkclient lib > seems to die silently if there is an UnknownHostException(or any > IOException) while reconnecting the ZK session. I've filed a bug about this > with the zkclient lib(https://github.com/sgroschupf/zkclient/issues/23). > The > ramifications for Kafka were the silent loss of all ephemeral nodes > associated with the affected process. > > Has anyone faced this issue? If so, what is the recommended way of dealing > with this? > > If there is no good solution available, would the community be open to a > patch that periodically verifies ZK connectivity? > > Thanks, > Anatoly >
