Hi,
Zookeeper implements a delay of up to 1 second before trying to reconnect.
ClientCnxn$SendThread
@Override
public void run() {
...
while (state.isAlive()) {
try {
if (!clientCnxnSocket.isConnected()) {
if(!isFirstConnect){
try {
Thread.sleep(r.nextInt(1000));
} catch (InterruptedException e) {
LOG.warn("Unexpected exception", e);
}
This creates "outages" (even with simple retry on ConnectionLoss) up to
1s even with perfectly healthy cluster like in scenario of rolling
restart. In our scenario it might be a problem under high load creating
a spike in a number of requests waiting on zk operation.
Would it be a better strategy to perform reconnect attempt immediately
at least one time? Or there is more to it?
Regards,
Sergei
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