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From "Steve Loughran (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SPARK-23807) Add Hadoop 3 profile with relevant POM fix ups
Date Tue, 03 Apr 2018 20:16:00 GMT

     [ https://issues.apache.org/jira/browse/SPARK-23807?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Steve Loughran updated SPARK-23807:
-----------------------------------
    Summary: Add Hadoop 3 profile with relevant POM fix ups  (was: Add Hadoop 3 profile with
relevant POM fix ups, cloud-storage artifacts and binding)

> Add Hadoop 3 profile with relevant POM fix ups
> ----------------------------------------------
>
>                 Key: SPARK-23807
>                 URL: https://issues.apache.org/jira/browse/SPARK-23807
>             Project: Spark
>          Issue Type: Sub-task
>          Components: Build
>    Affects Versions: 2.4.0
>            Reporter: Steve Loughran
>            Priority: Major
>
> Hadoop 3, and particular Hadoop 3.1 adds:
>  * Java 8 as the minimum (and currently sole) supported Java version
>  * A new "hadoop-cloud-storage" module intended to be a minimal dependency POM for all
the cloud connectors in the version of hadoop built against
>  * The ability to declare a committer for any FileOutputFormat which supercedes the classic
FileOutputCommitter -in both a job and for a specific FS URI
>  * A shaded client JAR, though not yet one complete enough for spark.
>  * Lots of other features and fixes.
> The basic work of building spark with hadoop 3 is one of just doing the build with {{-Dhadoop.version=3.x.y}};
however that
>  * Doesn't build on SBT (dependency resolution of zookeeper JAR)
>  * Misses the new cloud features
> The ZK dependency can be fixed everywhere by explicitly declaring the ZK artifact, instead
of relying on curator to pull it in; this needs a profile to declare the right ZK version,
obviously..
> To use the cloud features spark the hadoop-3 profile should declare that the spark-hadoop-cloud
module depends on —and only on— the hadoop/hadoop-cloud-storage module for its transitive
dependencies on cloud storage, and a source package which is only built and tested when build
against Hadoop 3.1+
>  



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