[jira] [Commented] (SPARK-797) ML failures if libfortran is not installed

["Sean Owen (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-797?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14289204#comment-14289204 ] 

Sean Owen commented on SPARK-797:
---------------------------------

I suggest this can be resolved. The dependency isn't going to be removed, and it's documented. I can't figure out where to put a check for these libs since not even every app that imports MLlib will end up touching jblas. A warning is a little nicer but the result is still that the program can't continue.

> ML failures if libfortran is not installed
> ------------------------------------------
>
>                 Key: SPARK-797
>                 URL: https://issues.apache.org/jira/browse/SPARK-797
>             Project: Spark
>          Issue Type: Bug
>    Affects Versions: 0.8.0
>            Reporter: Patrick Wendell
>            Assignee: Shivaram Venkataraman
>
> When running tests with the new ML package, I get:
> {quote}
> [info]   spark.SparkException: Job failed: Task 5.0:0 failed more than 4 times; aborting job java.lang.UnsatisfiedLinkError: org.jblas.NativeBlas.dgemm(CCIIID[DII[DIID[DII)V
> {quote}
> Shivaram mentioned I should install a Fortran package:
> {quote}
> sudo apt-get install libgfortran3
> {quote}
> And it worked after that. We should figure out exactly what the dependencies are here list in the build instructions that they exist. Also, if these are runtime dependencies we should mention them clearly in the main Spark docs.



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