para created KAFKA-9874:
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Summary: broker can not work when use dns fault
Key: KAFKA-9874
URL: https://issues.apache.org/jira/browse/KAFKA-9874
Project: Kafka
Issue Type: Bug
Components: core
Affects Versions: 2.4.1
Reporter: para
Attachments: kast.log
in 2.3.1 we authenticate using sasl blocked when the dns service is
fault，caused by java native func getHostByAddr.
but the hostname was never used, can use the default name instead of it
h3.
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