[
https://issues.apache.org/jira/browse/HDFS-4712?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13639425#comment-13639425
]
Colin Patrick McCabe commented on HDFS-4712:
--------------------------------------------
Hi Andrea,
I think {{datanodeReport}} is the method you want, much better than my earlier
suggestion.
If I am interpreting correctly, you say you are creating your own
{{DFSClient}}. It shouldn't be necessary for you to do that, since there
should already be one of those that you can get from the existing
{{FileSystem}}.
I don't think that the requirement for superuser privileges is a problem. Just
set {{errno}} to {{EPERM}} if the user doesn't have the correct permissions.
The requirement to be superuser here is deliberate, and we don't want to open a
security hole.
Please do attach the code; that's the first step towards getting it included in
HDFS. You can also click "submit patch" to get JIRA results on it.
> New libhdfs method hdfsGetDataNodes
> -----------------------------------
>
> Key: HDFS-4712
> URL: https://issues.apache.org/jira/browse/HDFS-4712
> Project: Hadoop HDFS
> Issue Type: New Feature
> Components: libhdfs
> Reporter: andrea manzi
>
> we have implemented a possible extension to libhdfs to retrieve information
> about the available datanodes ( there was a mail on the hadoop-hdsf-dev
> mailing list initially abut this :
> http://mail-archives.apache.org/mod_mbox/hadoop-hdfs-dev/201204.mbox/%3CCANhO-
> s0mvororrxpjnjbql6brkj4c7l+u816xkdc+2r0whj...@mail.gmail.com%3E)
> i would like to know how to proceed to create a patch, cause on the wiki
> http://wiki.apache.org/hadoop/HowToContribute i can see info about JAVA
> patches but nothing related to extensions in C.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira
