0518 improve kafka connection error logs #13070
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The Kafka producer lib wolff returns detailed error logs about which host:port had issue, EMQX should log them to help troubleshooting
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terry-xiaoyu
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Fixes EMQX-12403
Release version: v/e5.7.1
Summary
Example log when Kafka's advertised listener is unreachable.
2024-05-18T19:13:48.412913+02:00 [warning] msg: add_channel_failed, id: <<"connector:kafka_producer:k1">>, reason: #{cause => "no_connected_partition_leader",kafka_topic => "test-topic-2",kafka_client => <<"connector:kafka_producer:k1">>,first_error => {1,{down,#{reason => unresolvable_hostname,host => <<"localhostx:9092">>}}},total_errors => 2}, channel_id: <<"action:kafka_producer:k1:connector:kafka_producer:k1">>
PR Checklist
Please convert it to a draft if any of the following conditions are not met. Reviewers may skip over until all the items are checked:
changes/(ce|ee)/(feat|perf|fix|breaking)-<PR-id>.en.mdfilesChecklist for CI (.github/workflows) changes
changes/dir for user-facing artifacts update