private Object convertByteArray(JsonNode node) {
		try {
			return node.binaryValue();
		} catch (IOException e) {
			throw new RuntimeException("Unable to deserialize byte array.", e);
		}
	}
Configures the failure behaviour if a JSON field is missing.

<p>By default, a missing field is ignored and the field is set to null.

@param failOnMissingField Flag indicating whether to fail or not on a missing field.
kafka-base/kafka-base-source/src/main/java/org/apache/flink/formats/json/DTJsonRowDeserializationSchema.java