dragosvictor commented on code in PR #1208:
URL: https://github.com/apache/pulsar-client-go/pull/1208#discussion_r1576507047


##########
pulsar/producer_partition.go:
##########
@@ -429,12 +453,22 @@ func (p *partitionProducer) reconnectToBroker() {
                        return
                }
 
-               if p.options.BackoffPolicy == nil {
+               var assignedBrokerURL string
+
+               if connectionClosed != nil && connectionClosed.HasURL() {
+                       delayReconnectTime = 0
+                       assignedBrokerURL = connectionClosed.assignedBrokerURL
+                       connectionClosed = nil // Only attempt once

Review Comment:
   There is a for loop wrapping around the reconnection attempts:
   
   ```go
        for maxRetry != 0 {
                if p.getProducerState() != producerReady {
                        // Producer is already closing
                        p.log.Info("producer state not ready, exit reconnect")
                        return
                }
   
                var assignedBrokerURL string
   
                if connectionClosed != nil && connectionClosed.HasURL() {
                        delayReconnectTime = 0
                        assignedBrokerURL = connectionClosed.assignedBrokerURL
                        connectionClosed = nil // Only attempt once
                } else if p.options.BackoffPolicy == nil {
                        delayReconnectTime = defaultBackoff.Next()
                } else {
                        delayReconnectTime = p.options.BackoffPolicy.Next()
                }
        ...
   ```
   
   Setting the variable to nil guarantees we will only attempt connection to 
the assigned broker once. If that fails, for whatever reason, we revert back to 
performing topic lookups in order to locate the broker serving the topic.
   
   



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