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https://issues.apache.org/jira/browse/FLINK-9072?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=16416926#comment-16416926
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liuzhuo commented on FLINK-9072:
I see underscores are not a allowed in hostnames, But some devops can
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https://issues.apache.org/jira/browse/FLINK-9072?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=16413975#comment-16413975
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Chesnay Schepler commented on FLINK-9072:
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According to https://tools.ietf.org/html/rfc952
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https://issues.apache.org/jira/browse/FLINK-9072?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=16413607#comment-16413607
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yuqi commented on FLINK-9072:
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[~clevermose] I can also repreduce this problem
> Host name with "_" causes
