clintropolis commented on issue #7258: #5884 Avro Maps can't be flattened in Kafka Indexing on master URL: https://github.com/apache/incubator-druid/pull/7258#issuecomment-474106178 >I spend my morning trying to run a test case, but it's not so easy has using the io.confluent.kafka.serializers.KafkaAvroSerializer without a kafkaproducer is quite an hard job. I test it many times on real Confluent 5.1 Kafka Cluster with Schema Registry. I think this issue would exist for any type of Avro indexing; like if you could create an Avro formatted file with a column that is a map type with utf8 keys, you could test with the Hadoop indexing tests if that would be easier. That said, this change seems small and harmless enough that I think it would probably be ok without tests, so I will go ahead and approve.
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