Github user dongjoon-hyun commented on the issue:
https://github.com/apache/zeppelin/pull/3206
I understand the situation. FYI, the binaries (except SparkR) are ready.
1. Download: https://www-us.apache.org/dist/spark/spark-2.4.0/
2. Maven:
https://mvnrepository.com/artifact/org.apache.spark/spark-core_2.12/2.4.0
3. PySpark: https://pypi.org/project/pyspark/2.4.0/
SparkR seems to be rejected by CRAN. But, in the worst case, it will become
2.4.1. I guess so.
Zeppelin depends on only (1), doesn't it?
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