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https://issues.apache.org/jira/browse/HADOOP-11058?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14254875#comment-14254875
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Masatake Iwasaki commented on HADOOP-11058:
-------------------------------------------
Basically commands work by default config values even if there are no files in
HADOOP_CONF_DIR (except for FsShell. Only FsShell throws RuntimeException if
resources such as core-site.xml and hdfs-site.xml are not found. See
HADOOP-11405).
> Missing HADOOP_CONF_DIR generates strange results
> -------------------------------------------------
>
> Key: HADOOP-11058
> URL: https://issues.apache.org/jira/browse/HADOOP-11058
> Project: Hadoop Common
> Issue Type: Improvement
> Components: scripts
> Reporter: Allen Wittenauer
> Assignee: Masatake Iwasaki
> Labels: newbie
> Attachments: HADOOP-11058.1.patch
>
>
> If HADOOP_CONF_DIR is defined but points to a directory that either doesn't
> exist or isn't actually a viable configuration directory, all sorts of weird
> things happen, especially for logging. The shell code should do a better job
> of verifying the directory is valid and exit if it detects if it is broken in
> some way.
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