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https://issues.apache.org/jira/browse/PIO-49?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15883174#comment-15883174
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ASF GitHub Bot commented on PIO-49:
-----------------------------------

Github user dszeto commented on the issue:

    https://github.com/apache/incubator-predictionio/pull/336
  
    @marevol @pferrel Would have never expected about the plugins mechanism 
being found without documentation. It's a debt that I should pay. :)
    
    The original intention is for implementing event server and prediction 
server plugins, so that you can put arbitrary filters in front by just dropping 
in JARs.
    
    Using `spark-submit --jars` is ideal. I was actually going to propose 
moving away from submitting a PIO assembly and instead submit a `lib` folder of 
JARs or even take advantage of Spark's dependency management (automatic 
downloads of all other dependencies). If we agree going down this path, let's 
follow @marevol 's suggestion and rename `plugins` to `lib` instead? What do 
you think?



> Add support for Elasticsearch 5.x
> ---------------------------------
>
>                 Key: PIO-49
>                 URL: https://issues.apache.org/jira/browse/PIO-49
>             Project: PredictionIO
>          Issue Type: Improvement
>            Reporter: Shinsuke Sugaya
>
> We work on meta/event storage support for Elasticsearch 5.x.
> Although Elasticsearch 2.x does not allow dots in field names,
> Elasticsearch 5.x supports it. So, it's better to upgrade to ES 5.x release.
> Since ES 5.x provides Java Rest API client, we replaced
> Transport communication with HTTP one. Therefore, our fix
> uses HTTP(9200 port) only.



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