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https://issues.apache.org/jira/browse/HBASE-30257?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18092220#comment-18092220
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Tak-Lon (Stephen) Wu commented on HBASE-30257:
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PRs of all cherry-picks , and let's see if we can get clean auto checks
1. branch-3, https://github.com/apache/hbase/pull/8429
2. branch-2, https://github.com/apache/hbase/pull/8430
3. branch-2.6, https://github.com/apache/hbase/pull/8431
> Fix case-sensitive hostname check in region server
> --------------------------------------------------
>
> Key: HBASE-30257
> URL: https://issues.apache.org/jira/browse/HBASE-30257
> Project: HBase
> Issue Type: Bug
> Affects Versions: 3.0.0-beta-1, 4.0.0-alpha-1, 2.6.6
> Reporter: Tak-Lon (Stephen) Wu
> Assignee: Tak-Lon (Stephen) Wu
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.0.0-alpha-1
>
>
> HBASE-27333 introduced a hostname validation check on RegionServer startup.
> This check is case-sensitive; if the Master reports the hostname in uppercase
> but the RegionServer resolves it in lowercase, the RegionServer aborts with a
> hostname mismatch error. This occurs even though DNS resolution is
> case-insensitive by nature and both names refer to the same host
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