Github user BryanCutler commented on the issue: https://github.com/apache/spark/pull/19098 @srowen , the assertion is from the Spark `ColumnarBatch` [here](https://github.com/apache/spark/blob/master/sql/core/src/main/java/org/apache/spark/sql/execution/vectorized/ColumnarBatch.java#L491). ```java public ColumnarBatch.Row getRow(int rowId) { assert(rowId >= 0); assert(rowId < numRows); row.rowId = rowId; return row; } ``` I'm also not quite sure why this wasn't working, I checked and `-ea` is an added argument in the pom. Still, I wonder if we should change the asserts in this class to something better. Maybe these are used instead of exceptions for performance?
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