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https://issues.apache.org/jira/browse/SPARK-13120?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15136360#comment-15136360
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Sean Owen commented on SPARK-13120:
-----------------------------------

What problem does that solve then? shading really helps when the API has 
changed across versions. It doesn't fix what third-party libs might provide at 
runtime though. I like shading in general as a defensive mechanism, but would 
like to do so only when we have some plausible scenario it fixes. The thread at 
the top doesn't show a protobuf problem of this form.

> Shade protobuf-java
> -------------------
>
>                 Key: SPARK-13120
>                 URL: https://issues.apache.org/jira/browse/SPARK-13120
>             Project: Spark
>          Issue Type: Improvement
>          Components: Build
>            Reporter: Ted Yu
>
> See this thread for background information:
> http://search-hadoop.com/m/q3RTtdkUFK11xQhP1/Spark+not+able+to+fetch+events+from+Amazon+Kinesis
> This issue shades com.google.protobuf:protobuf-java as 
> org.spark-project.protobuf



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