[jira] [Updated] (MAPREDUCE-3087) CLASSPATH not the same after MAPREDUCE-2880

["Ravi Prakash (Updated) (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/MAPREDUCE-3087?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ravi Prakash updated MAPREDUCE-3087:
------------------------------------

    Attachment: MAPREDUCE-3087.patch

Seems like I finally figured this one out.

The line at issue is MRApps.java:191
bq.           thisClassLoader.getResource(mrAppGeneratedClasspathFile).getFile() );

The output of the getFile() method includes the "!mrapp-generated-classpath" . e.g. in a test program
{noformat}
URL url = new URL("file:/somepath/somewhere/mr-apps.jar!mrapp-generated-classpath");
System.out.println("Added " + url.getFile());
System.out.println("Should add " + url.getFile().split("!")[0] );
{noformat}
outputs
{noformat}
Added /somepath/somewhere/mr-apps.jar!mrapp-generated-classpath
Should add /somepath/somewhere/mr-apps.jar
{noformat}

So the line 191 was simply adding /somepath/somewhere/mr-app.jar!mrapp-generated-classpath to the classpath. This prevents my JVM to read mr-app.jar as included in the classpath.

Attaching a small patch to fix this issue. Can someone please review and commit this?
                
> CLASSPATH not the same after MAPREDUCE-2880
> -------------------------------------------
>
>                 Key: MAPREDUCE-3087
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3087
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>            Reporter: Ravi Prakash
>         Attachments: MAPREDUCE-3087.patch, notworking.classpath.uniq, working.classpath.uniq
>
>
> After MAPREDUCE-2880, my classpath was missing key jar files. 

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