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Posted to dev@mahout.apache.org by "Cristian Galán (JIRA)" <ji...@apache.org> on 2014/12/18 13:47:13 UTC

[jira] [Updated] (MAHOUT-1634) ALS don't work when it adds new files in Distributed Cache

     [ https://issues.apache.org/jira/browse/MAHOUT-1634?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Cristian Galán updated MAHOUT-1634:
-----------------------------------
    Status: Patch Available  (was: Open)

I try the solution in a test of my project with Eclipse in a local job (without hadoop fs) in Linux Mint 17 and a distributed job in a CDH5.1 VM with zookeeper, and in both cases works.

The Mahout test fails. If I have time, I will see.

> ALS don't work when it adds new files in Distributed Cache
> ----------------------------------------------------------
>
>                 Key: MAHOUT-1634
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-1634
>             Project: Mahout
>          Issue Type: Bug
>          Components: Collaborative Filtering
>    Affects Versions: 0.9
>         Environment: Cloudera 5.1 VM, eclipse, zookeeper
>            Reporter: Cristian Galán
>              Labels: ALS
>             Fix For: 1.0
>
>         Attachments: mahout.patch
>
>   Original Estimate: 24h
>  Remaining Estimate: 24h
>
> ALS algorithm uses distributed cache to temp files, but the distributed cache have other uses too, especially to add dependencies
> (http://blog.cloudera.com/blog/2011/01/how-to-include-third-party-libraries-in-your-map-reduce-job/), so when in a hadoop's job we add a dependency library (or other file) ALS fails because it reads ALL files in Distribution Cache without distinction.
> This occurs in the project of my company because we need to add Mahout dependencies (mahout, lucene,...) in an hadoop Configuration to run Mahout's jobs, otherwise the Mahout's job fails because it don't find the dependencies.
> I propose two options (I think two valid options):
> 1) Eliminate all .jar in the return of HadoopUtil.getCacheFiles
> 2) Elliminate all Path object distinct of /part-*
> I prefer the first because it's less aggressive, and I think this solution will be resolve all problems.
> Pd: Sorry if my english is wrong.



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