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https://issues.apache.org/jira/browse/HDFS-4983?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13839526#comment-13839526
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Jing Zhao commented on HDFS-4983:
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bq. Let's figure out the right answer here.
Thanks Andrew! This sounds like a good plan.
So since to make a one-line change is very simple and direct and will not bring
other critical issues except not consistent with httpFS, how about we first
make this change in this jira? We can always make it configurable in the future
if we have this requirement from end users.
> Numeric usernames do not work with WebHDFS FS
> ---------------------------------------------
>
> Key: HDFS-4983
> URL: https://issues.apache.org/jira/browse/HDFS-4983
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: webhdfs
> Affects Versions: 2.0.0-alpha
> Reporter: Harsh J
> Assignee: Yongjun Zhang
> Labels: patch
> Attachments: HDFS-4983.001.patch, HDFS-4983.002.patch,
> HDFS-4983.003.patch
>
>
> Per the file
> hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/web/resources/UserParam.java,
> the DOMAIN pattern is set to: {{^[A-Za-z_][A-Za-z0-9._-]*[$]?$}}.
> Given this, using a username such as "123" seems to fail for some reason
> (tried on insecure setup):
> {code}
> [123@host-1 ~]$ whoami
> 123
> [123@host-1 ~]$ hadoop fs -fs webhdfs://host-2.domain.com -ls /
> -ls: Invalid value: "123" does not belong to the domain
> ^[A-Za-z_][A-Za-z0-9._-]*[$]?$
> Usage: hadoop fs [generic options] -ls [-d] [-h] [-R] [<path> ...]
> {code}
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