[jira] Commented: (HADOOP-3918) Improve fuse-dfs error message when classpath not set or set incorrectly

["Hadoop QA (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-3918?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12628532#action_12628532 ] 

Hadoop QA commented on HADOOP-3918:
-----------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12388007/patch2.txt
  against trunk revision 692287.

    +1 @author.  The patch does not contain any @author tags.

    +1 tests included.  The patch appears to include 3 new or modified tests.

    +1 javadoc.  The javadoc tool did not generate any warning messages.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    +1 findbugs.  The patch does not introduce any new Findbugs warnings.

    -1 core tests.  The patch failed core unit tests.

    +1 contrib tests.  The patch passed contrib unit tests.

Test results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/3177/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/3177/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/3177/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://hudson.zones.apache.org/hudson/job/Hadoop-Patch/3177/console

This message is automatically generated.

> Improve fuse-dfs error message when classpath not set or set incorrectly
> ------------------------------------------------------------------------
>
>                 Key: HADOOP-3918
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3918
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: contrib/fuse-dfs
>            Reporter: Pete Wyckoff
>            Assignee: Pete Wyckoff
>            Priority: Minor
>         Attachments: patch0.txt, patch1.txt, patch1.txt, patch2.txt
>
>
> Currently libhdfs does an exit(1) when it cannot create a hadoop object. fuse does not like this and instead fuse_dfs should return -EIO and log to syslog and stderr a message. Also if it is obvious somehting is wrong, like the CLASSPATH is null or does not contain something of the form hadoop-[a-zA-Z-].jar immediately print an error and exit
> Note that it is tough to debug this issue because when fuse-dfs is not in debug mode, it is running as a fuse module and stderr is redirected, so all one gets is "software abort" when libhdfs exits. So, this will greatly improve things since fuse-dfs can print a proper error and the user can quickly see what the problem is.

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