[jira] [Commented] (MESOS-1203) Shade protobuf dependency in Mesos Java library

["Patrick Wendell (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MESOS-1203?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13965888#comment-13965888 ] 

Patrick Wendell commented on MESOS-1203:
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Just a heads up - this is actually going to block us from upgrading to Mesos 1.7 in the Spark 1.0 release since it's not compatible with older Hadoop versions.

> Shade protobuf dependency in Mesos Java library
> -----------------------------------------------
>
>                 Key: MESOS-1203
>                 URL: https://issues.apache.org/jira/browse/MESOS-1203
>             Project: Mesos
>          Issue Type: Improvement
>          Components: build
>            Reporter: Patrick Wendell
>
> Mesos's Java library uses the protobuf library which is also used by Hadoop. Unfortunately the protobuf library does not provide binary compatiblity between minor versions (for code compiled against 2.4.1 and 2.5.0 cannot run together in a single JVM classlaoder) .
> This makes use of Mesos via it's Java API, something that is required for Spark and I'm assuming other frameworks, fundamentally incompatible for certain Hadoop versions.
> Mesos could shade this jar using the maven shade plug-in. Take a look at the Parquet project for an example of shading:
> https://github.com/Parquet/parquet-mr/blob/master/pom.xml#L198
> Without this fix Java users won't be able to use Mesos (< 0.17) with newer versions of Hadoop.



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