Github user tcondie commented on a diff in the pull request: https://github.com/apache/spark/pull/15626#discussion_r85609921 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/CompactibleFileStreamLog.scala --- @@ -37,14 +39,19 @@ import org.apache.spark.sql.SparkSession * compact log files every 10 batches by default into a big file. When * doing a compaction, it will read all old log files and merge them with the new batch. */ -abstract class CompactibleFileStreamLog[T: ClassTag]( +abstract class CompactibleFileStreamLog[T <: AnyRef : ClassTag]( --- End diff -- It's required by json4s that T be an AnyRef.
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