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From "Brandon Li (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-7942) NFS: regex value of nfs.exports.allowed.hosts is not working as expected
Date Tue, 17 Mar 2015 23:42:38 GMT

    [ https://issues.apache.org/jira/browse/HDFS-7942?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14366320#comment-14366320
] 

Brandon Li commented on HDFS-7942:
----------------------------------

The regular expression is wrong. Instead of "206.190.52.[26|23]", it should be "206.190.52.(26|23)'.
However, the grouping expression "( )" is not recognized by NfsExports class.

> NFS: regex value of nfs.exports.allowed.hosts is not working as expected
> ------------------------------------------------------------------------
>
>                 Key: HDFS-7942
>                 URL: https://issues.apache.org/jira/browse/HDFS-7942
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: nfs
>    Affects Versions: 2.6.0
>            Reporter: Brandon Li
>            Assignee: Brandon Li
>
> Thanks, [~yeshavora], for reporting this problem.
> Set regex value in nfs.exports.allowed.hosts property.
> {noformat}
> <property><name>nfs.exports.allowed.hosts</name><value>206.190.52.[26|23]
rw</value></property>
> {noformat}
> With this value, neither 206.190.52.26 nor 206.190.52.23 can mount nfs and act as nfs
client. In conclusion, no host can mount nfs with this regex value due to access denied error.
> {noformat}
> >$ sudo su - -c "mount -o soft,proto=tcp,vers=3,rsize=1048576,wsize=1048576,nolock
206.190.52.23:/ /tmp/tmp_mnt" root
> mount.nfs: access denied by server while mounting 206.190.52.23:/
> {noformat}



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