Moritz Moeller created HADOOP-8867:
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Summary: always use canonical host name for kerberos _HOST macro
expansion
Key: HADOOP-8867
URL: https://issues.apache.org/jira/browse/HADOOP-8867
Project: Hadoop Common
Issue Type: Improvement
Components: security
Affects Versions: 2.0.1-alpha
Reporter: Moritz Moeller
right now SecurityUtil.replacePattern is called with the verbatim configured
hostname, not with the canonicalized form.
without this patch the hostnames in the configuration must be canonical, with
this patch one can use cname aliases (we use a cname alias for the namenode).
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