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Posted to common-dev@hadoop.apache.org by "Vinod Kumar Vavilapalli (JIRA)" <ji...@apache.org> on 2008/03/11 11:24:46 UTC
[jira] Commented: (HADOOP-2983) [HOD] local_fqdn() returns None
when gethostbyname_ex doesnt return any FQDNs.
[ https://issues.apache.org/jira/browse/HADOOP-2983?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12577368#action_12577368 ]
Vinod Kumar Vavilapalli commented on HADOOP-2983:
-------------------------------------------------
+1 for the fix.
Please attach the patch again, *with* license granted. (Hudson seems to miss your 'tick' :) ). Then, submit the patch and run it through Hudson.
> [HOD] local_fqdn() returns None when gethostbyname_ex doesnt return any FQDNs.
> ------------------------------------------------------------------------------
>
> Key: HADOOP-2983
> URL: https://issues.apache.org/jira/browse/HADOOP-2983
> Project: Hadoop Core
> Issue Type: Bug
> Components: contrib/hod
> Affects Versions: 0.16.0
> Environment: Linux, PBS
> Reporter: Craig Macdonald
> Attachments: HOD_util_local_fqdn.py
>
>
> For some reason (probably in our local DNS setup) gethostbyname_ex() does not return any fully qualified hostnames. This has never been an issue, everything has worked fully with the hostnames.
> However, this causes HOD to fail, as local_fqn() in util.py returns None.
> {noformat}
> Python 2.5.1 (r251:54863, Sep 21 2007, 16:05:06)
> [GCC 3.4.6 20060404 (Red Hat 3.4.6-3)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> >>> import socket, os
> >>> socket.gethostbyname_ex(os.uname()[1])
> ('bohol', [], ['130.209.252.70'])
> >>>
> {noformat}
> The solution is to fix local_fqdn in until.py, such that it falls back to the contents of the variable me if fqdn is still None.
> Ta muchly.
> Craig
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