Router thread failed to connect to broker for metadata about bruce

[dspeterson]

I assume that the section of bruce's config file specifies broker_host_1 port 9092, since bruce successfully connects to that broker and gets metadata. The metadata response gives the hostnames and ports of all brokers, which is how bruce knows which brokers to connect to for message transmission. The following log message:

bruce[21788]: Connector thread 21793 (index 0 broker 1) connecting to host localhost port 9092

suggests that according to the metadata response, one of the brokers is running on localhost port 9092 (clearly wrong), so bruce tries unsuccessfully to connect to a broker running locally. That suggests that your Kafka cluster is misconfigured. Take a look at the server.properties file for each broker and verify that everything is correct. In particular, take a look at the the settings for host.name, advertised.host.name, and advertised.port. I suspect that one or more of these settings are wrong. In my broker config, all 3 settings are commented out. For troubleshooting purposes, bruce comes with a program called mdrequest, which connects to a broker, sends a metadata request, and writes JSON to standard output showing the response. This may help. You can build and run it as follows, from the root of bruce's source tree:

./build_all -v
out/debug/bruce/kafka_proto/v0/mdrequest --broker_host broker_host_1 --broker_port 9092

Let me know if you still have problems.