[IGNITE-6369] 2.11 Spark integration has a dependency on Spark's 2.10 library

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Cannot Reproduce
• Fix Version/s: 2.4
• Component/s: spark
• Assignee: Unassigned
• Reporter: Hubert Plociniczak
• Created: 13/Sep/17 13:47
• Updated: 11/Jan/18 12:33
• Resolved: 11/Jan/18 12:33

Description

A simple Spark application that uses both Spark and Ignite fails to compile in sbt under 2.11 due to conflicting dependencies. For a simple sbt definition with:

libraryDependencies += "org.apache.spark" %% "spark-core" % "2.1.0" 
libraryDependencies += "org.apache.spark" %% "spark-sql" % "2.1.0" 
libraryDependencies += "org.apache.ignite" % "ignite-spark" % "2.1.0"

it will fail to compile with:

[error] Modules were resolved with conflicting cross-version suffixes in: 
[error]    org.scalatest:scalatest _2.11, _2.10 
[error]    com.twitter:chill _2.11, _2.10 
[error]    org.apache.spark:spark-unsafe _2.11, _2.10 
[error]    org.apache.spark:spark-tags _2.11, _2.10 
[trace] Stack trace suppressed: run 'last *:update' for the full output. 

It looks like a single culprit is the entry in ignite-spark's pom.xml for
spark-unsafe_2.10.
When removed, compiled and published, everything works great.
I don't see why such an entry exists in spark module when there is a separate spark-2.10 module as well.

Happy to submit a PR if anyone is willing to give a thumbs up.