mukund-thakur commented on issue #1955: HADOOP-13873 log DNS addresses on s3a init URL: https://github.com/apache/hadoop/pull/1955#issuecomment-613464431 > Try `NetUtils.getHostNameOfIP()`; it will convert UnknownHostException to null...everyone hates it when a debug log statement causes errors as then debug logging can make things worse This expects an IP and returns null in validation only if hostname is passed. So I figured NetUtils.normalizeHostName() is the one we are looking for. UnknownHostException will be ignored.
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