Jackie-Jiang commented on issue #4187: Issue with ingestion data with empty array URL: https://github.com/apache/incubator-pinot/issues/4187#issuecomment-490265976 @jamesyfshao Are you using custom record reader? Pinot does not support empty array as input, and record reader should already fill in default value for empty array. You can refer to this method: [https://github.com/apache/incubator-pinot/blob/a7a8bb64b3fd6cc3ed8e8feeb9772404f23aa307/pinot-core/src/main/java/org/apache/pinot/core/data/readers/RecordReaderUtils.java#L208](url)
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