Github user tony810430 commented on a diff in the pull request: https://github.com/apache/flink/pull/3651#discussion_r108864201 --- Diff: flink-connectors/flink-connector-kinesis/src/main/java/org/apache/flink/streaming/connectors/kinesis/util/KinesisConfigUtil.java --- @@ -224,27 +222,19 @@ private static void validateOptionalPositiveDoubleProperty(Properties config, St } } - private static void validateOptionalDateProperty(Properties config, String timestampKey, String formatKey, String message) { + private static void validateOptionalDateProperty(Properties config, String timestampKey, String format, String message) { if (config.containsKey(timestampKey)) { - if (config.containsKey(formatKey)) { - try { - SimpleDateFormat customDateFormat = new SimpleDateFormat(config.getProperty(formatKey)); - customDateFormat.parse(config.getProperty(timestampKey)); - } catch (ParseException | IllegalArgumentException | NullPointerException exception) { - throw new IllegalArgumentException(message); - } - } else { + try { + SimpleDateFormat customDateFormat = new SimpleDateFormat(format); --- End diff -- IllegalArgumentException would be thrown. See `SimpleDateFormat` [API](https://docs.oracle.com/javase/7/docs/api/java/text/SimpleDateFormat.html#SimpleDateFormat(java.lang.String)).
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