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https://issues.apache.org/jira/browse/HADOOP-2227?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12550067
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Devaraj Das commented on HADOOP-2227:
-------------------------------------

bq. This is doable, but involves an RPC
We anyway do an RPC to get the DFSFileInfo, right? Isn't the length always 
present? 

> wrong usage of mapred.local.dir.minspacestart 
> ----------------------------------------------
>
>                 Key: HADOOP-2227
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2227
>             Project: Hadoop
>          Issue Type: Bug
>          Components: mapred
>    Affects Versions: 0.15.1
>            Reporter: Christian Kunz
>            Assignee: Amareshwari Sri Ramadasu
>            Priority: Critical
>
> As I understand it, mapred.local.dir.minspacestart should be used to specify 
> that a map or reduce task requires a minimum disk space to be executed. When 
> several disks are available, and mapred.local.dir lists all of them, then the 
> free space should be added up. But TaskTracker.enoughFreeSpace returns false 
> whenever one of the disks listed in mapred.local.dir has less than the space 
> specified by mapred.local.dir.minspacestart. 

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