Description

Configure a Producer or Consumer with a list of brokers where the first broker in the list cannot be reached (hostname is invalid, host is down, wrong port, ect) but there are valid, alive brokers in metadata.broker.list. Request metadata using prod->metadata(...). The Local: Timed out or Local: Broker transport failure error code will be returned.

How to reproduce

Start a kafka cluster with a node on localhost:9092.
run ./rdkafka_example_cpp -L -d all -b "google.com:9092,localhost:9092"
any hostname that doesn't have kafka running on port 9092 in the above example works.

Checklist

Please provide the following information:

• [x ] librdkafka version (release number or git tag):0.9.1
• [x ] Apache Kafka version: 0.9.0.0
• librdkafka client configuration:
• [x ] Operating system: Ubuntu 16.04
• Using the legacy Consumer
• Using the high-level KafkaConsumer
• [x ] Provide logs (with debug=.. as necessary) from librdkafka
  Log for ./rdkafka_example_cpp -L -d all -b "google.com:9092,localhost:9092": log
  Log for ./rdkafka_example_cpp -L -d all -b "localhost:9090,localhost:9092" log2
• Provide broker log excerpts
• [x ] Critical issue