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From "Jason Lowe (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-4427) start-dfs.sh generates malformed ssh command when not running with native libs
Date Mon, 03 Mar 2014 14:29:21 GMT

    [ https://issues.apache.org/jira/browse/HDFS-4427?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13918094#comment-13918094
] 

Jason Lowe commented on HDFS-4427:
----------------------------------

Native libs are preferable, but if native libs aren't an option another workaround is to explicitly
set hadoop.security.group.mapping to org.apache.hadoop.security.ShellBasedUnixGroupsMapping
in core-site.xml.

> start-dfs.sh generates malformed ssh command when not running with native libs
> ------------------------------------------------------------------------------
>
>                 Key: HDFS-4427
>                 URL: https://issues.apache.org/jira/browse/HDFS-4427
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: scripts
>            Reporter: Jason Lowe
>            Assignee: Robert Parker
>
> After HADOOP-8712 the start-dfs.sh script is generating malformed ssh commands when the
native hadoop libraries are not present.  This is because {{hdfs getconf}} is printing a warning,
and that warning is accidentally interpreted as one of the machines to target for ssh.
> Here's an example output of hdfs getconf:
> {noformat}
> $ hdfs getconf -namenodes 2>/dev/null
> 2013-01-22 21:03:59,543 WARN  util.NativeCodeLoader (NativeCodeLoader.java:<clinit>(62))
- Unable to load native-hadoop library for your platform... using builtin-java classes where
applicable
> localhost
> {noformat}



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