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From Cody Koeninger <>
Subject UnusedStubClass in 1.3.0-rc1
Date Wed, 25 Feb 2015 15:53:05 GMT
So when building 1.3.0-rc1 I see the following warning:

[WARNING] spark-streaming-kafka_2.10-1.3.0.jar, unused-1.0.0.jar define 1
overlappping classes:

[WARNING]   - org.apache.spark.unused.UnusedStubClass

and when trying to build an assembly of a project that was previously using
1.3 snapshots without difficulty, I see the following errors:

[error] (*:assembly) deduplicate: different file contents found in the



This persists even after a clean / rebuild of both 1.3.0-rc1 and the
project using it.

I can just exclude that jar in the assembly definition, but is anyone else
seeing similar issues?  If so, might be worth resolving rather than make
users mess with assembly exclusions.

I see that this class was introduced a while ago, related to SPARK-3812 but
the jira issue doesn't have much detail.

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