[jira] Commented: (HADOOP-1792) df command doesn't exist under windows

["Olivier Dagenais (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-1792?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12547282 ] 

Olivier Dagenais commented on HADOOP-1792:
------------------------------------------

I got this problem too:  It appears DF is being used to compute available disk space before creating files.  While Java does not appears to have support for this (see [bug 4057701|http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4057701]), it does appear that another Apache project (sort of) does:

[org.apache.commons.FileSystemUtils.freeSpaceKb|http://commons.apache.org/io/api-release/org/apache/commons/io/FileSystemUtils.html#freeSpaceKb(java.lang.String)]

...at least it wouldn't require that Hadoop users on Windows install Cygwin.

> df command doesn't exist under windows
> --------------------------------------
>
>                 Key: HADOOP-1792
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1792
>             Project: Hadoop
>          Issue Type: Bug
>          Components: fs
>    Affects Versions: 0.14.0
>            Reporter: Benjamin Francisoud
>
> My code use to work with previous version of hadoop, I upgraded to 0.14 and now:
> java.io.IOException: CreateProcess: df -k "C:\Documents and Settings\Benjamin\Local Settings\Temp\test14906test\mapredLocal" error=2
> 	at java.lang.ProcessImpl.create(Native Method)
> 	at java.lang.ProcessImpl.<init>(Unknown Source)
> 	at java.lang.ProcessImpl.start(Unknown Source)
> 	at java.lang.ProcessBuilder.start(Unknown Source)
> 	at java.lang.Runtime.exec(Unknown Source)
> 	at java.lang.Runtime.exec(Unknown Source)
> 	at org.apache.hadoop.fs.DF.doDF(DF.java:60)
> 	at org.apache.hadoop.fs.DF.<init>(DF.java:53)
> 	at org.apache.hadoop.fs.LocalDirAllocator$AllocatorPerContext.confChanged(LocalDirAllocator.java:198)
> 	at org.apache.hadoop.fs.LocalDirAllocator$AllocatorPerContext.getLocalPathForWrite(LocalDirAllocator.java:235)
> 	at org.apache.hadoop.fs.LocalDirAllocator.getLocalPathForWrite(LocalDirAllocator.java:124)
> 	at org.apache.hadoop.mapred.MapOutputFile.getSpillFileForWrite(MapOutputFile.java:88)
> 	at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.sortAndSpillToDisk(MapTask.java:373)
> 	at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.flush(MapTask.java:593)
> 	at org.apache.hadoop.mapred.MapTask.run(MapTask.java:190)
> 	at org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:137)
> 	at org.apache.hadoop.mapred.LocalJobRunner.submitJob(LocalJobRunner.java:283)
> 	at org.apache.hadoop.mapred.JobClient.submitJob(JobClient.java:397)
> ...

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