Github user chriso commented on the issue: https://github.com/apache/spark/pull/16998 I just run into the same issue with `spark-2.1.0` Here's a minimal test case: ```scala val max = 12 // try increasing this val filter = (for (i <- 0 to max) yield col("value") <=> i) reduce (_ || _) val projections = for (i <- 0 to max) yield (col("value") <=> i).as(s"value_$i") val otherFilter = lit(true) // this can be anything val df = Seq.empty[Int].toDF val result = df.filter(otherFilter) .select(col("value") +: projections: _*) .filter(filter).filter(otherFilter) result.explain ``` The final `explain` call hangs [here](https://github.com/apache/spark/blob/db0ddce523bb823cba996e92ef36ceca31492d2c/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/LogicalPlan.scala#L325-L328).
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