I tried to pull Kafka in through Ivy this morning and got a strange error:

[ivy:resolve] problem occurred while resolving dependency:
org.apache.kafka#kafka_2.9.2;0.8.0-beta1 {default=[default]} with main:
java.lang.IllegalArgumentException: null name not allowed

I have filed https://issues.apache.org/jira/browse/KAFKA-981 to track this.

I'm wondering if underscores are allowed in the artifactId? Wouldn't a
Maven classifier be better for dealing with multiple Scala versions?

Something like:

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