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https://issues.apache.org/jira/browse/HADOOP-7487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13587083#comment-13587083
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Hudson commented on HADOOP-7487:
--------------------------------
Integrated in Hadoop-Hdfs-trunk #1328 (See
[https://builds.apache.org/job/Hadoop-Hdfs-trunk/1328/])
HADOOP-7487. DF should throw a more reasonable exception when mount cannot
be determined. Contributed by Andrew Wang. (Revision 1449992)
Result = FAILURE
atm : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1449992
Files :
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/CHANGES.txt
*
/hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/DF.java
*
/hadoop/common/trunk/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/TestDFVariations.java
> DF should throw a more reasonable exception when mount cannot be determined
> ---------------------------------------------------------------------------
>
> Key: HADOOP-7487
> URL: https://issues.apache.org/jira/browse/HADOOP-7487
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs
> Affects Versions: 0.23.0, 3.0.0, 2.0.3-alpha
> Reporter: Todd Lipcon
> Assignee: Andrew Wang
> Labels: noob
> Fix For: 2.0.4-beta
>
> Attachments: hadoop-7487-1.patch, hadoop-7487-2.patch,
> hadoop-7487-3.patch
>
>
> Currently, when using the DF class to determine the mount corresponding to a
> given directory, it will throw the generic exception "Expecting a line not
> the end of stream" if it can't determine the mount (for example if the
> directory doesn't exist).
> This error message should be improved in several ways:
> # If the dir to check doesn't exist, we can see that before even execing df,
> and throw a better exception (or behave better by chopping path components
> until it exists)
> # Rather than parsing the lines out of df's stdout, collect the whole output,
> and then parse. So, if df returns a non-zero exit code, we can avoid trying
> to parse the empty result
> # If there's a success exit code, and we still can't parse it (eg
> incompatible OS), we should include the unparseable line in the exception
> message.
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