Hi,
I am not an expert, but as I can say as an ops guy is that when a broker
loses its connection with Zk, it triggers a reelection and A will be out
of ISR. So no data will go to broker A anymore and during this timeframe
(from connection lost to reelection) the producer should receive an
Exception and you should handle it (like trying again, for example).
After the reelection (which is really fast), the producers will send
data to the new leader (AFAIK it is transparent to the producers - the
client libraries will handle this change)
In other words: you can only read/write messages to/from leaders which
is managed by Zk. If Zk can't connect to the node, it will remove it
from your cluster (even if the producer can communicate with the broker).
-- Anderson
On 30/07/2016 22:06, Krzysztof Nawara wrote:
Hello!
I've got the following question:
Let's assume broker A is leader for partition P1, to which my producer is
sending data. At one point A loses its connection to Zk, but my producer can
communicate with A without problems. Will my messages be lost? What'll trigger
switching to the new leader since A is no longer aware of what happens in the
cluster (because it doesn't have connection to Zk)?
Krzysiek
