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From "Colin Patrick McCabe (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-12281) Add an incompatible version of Kryo to the hadoop-client classpath
Date Wed, 05 Aug 2015 18:16:06 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-12281?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14658627#comment-14658627
] 

Colin Patrick McCabe commented on HADOOP-12281:
-----------------------------------------------

It seems like projects like Spark which use both Kryo and Hadoop will be -1 on this change.
 Again, I feel like I'm missing something.

Isn't the classpath isolation work going to prevent problems like this?  But until it's complete,
don't we just have to avoid doing things like this?

> Add an incompatible version of Kryo to the hadoop-client classpath
> ------------------------------------------------------------------
>
>                 Key: HADOOP-12281
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12281
>             Project: Hadoop Common
>          Issue Type: New Feature
>          Components: build
>            Reporter: Steve Loughran
>            Assignee: Gunther Hagleitner
>
> Although versions of guava & jackson create compatibility problems, the issue of
Kryo compatibility is put off until Hive, Spark and other libraries are loaded on the same
classpath. By adding a version of Kryo to the Hadoop core libraries, we can break everything
downstream in a consistent manner.



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