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https://issues.apache.org/jira/browse/HDFS-6456?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14053985#comment-14053985
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Brandon Li commented on HDFS-6456:
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Both comments from [~abutala] and [~yeshavora] make sense.
So, basically, the actually problem is "NFS should print error when there is no
valid export" regardless the cause (e.g., invalid hostname string, empty value,
...).
> NFS: NFS server should throw error for invalid entry in
> dfs.nfs.exports.allowed.hosts
> -------------------------------------------------------------------------------------
>
> Key: HDFS-6456
> URL: https://issues.apache.org/jira/browse/HDFS-6456
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: nfs
> Affects Versions: 2.2.0
> Reporter: Yesha Vora
>
> Pass invalid entry in dfs.nfs.exports.allowed.hosts. Use - as separator
> between hostname and access permission
> {noformat}
> <property><name>dfs.nfs.exports.allowed.hosts</name><value>host1-rw</value></property>
> {noformat}
> This misconfiguration is not detected by NFS server. It does not print any
> error message. The host passed in this configuration is also not able to
> mount nfs. In conclusion, no node can mount the nfs with this value. A format
> check is required for this property. If the value of this property does not
> follow the format, an error should be thrown.
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