Re: Providing Custom Serializer for Generic Type

Hi Gordon, thank you. The involved data structure is a complex abstraction owning a schema and values, it declares private fields which should not be edited directly from users. I'd say it's really akin to an Avro GenericRecord. How would you approach the problem if you have to serialize/deserializ

Re: does mapFunction need to implement CheckpointedFunction?

Sorry, I don't get your point. Before answering the question, I guess we need to make sure what you exactly want. BTW, have you read the document of checkpointing or state? [1] [2] Maybe it could help. 1. https://ci.apache.org/projects/flink/flink-docs-release-1.8/concepts/programming-model.html#

Flink Table API and Date fields

Hi to all, in my use case I have a stream of POJOs with Date fields. When I use Table API I get the following error: Exception in thread "main" org.apache.flink.table.api.ValidationException: SQL validation failed. Type is not supported: Date at org.apache.flink.table.calcite.FlinkPlannerImpl.vali

FlinkKafkaConsumer - Save watermark assigner in the state

Hello, We are currently facing an issue where we need to store the instance of the watermark and timestamp assigner in the state while consumer from Kafka. For that purpose we took a look at FlinkKafkaConsumerBase and noticed that since the methods (snapshotState and initializeState from the Ch

How are kafka consumer offsets handled if sink fails?

Hi using Apache Flink 1.8.0 I'm consuming events from Kafka using nothing fancy... Properties props = new Properties(); props.setProperty("bootstrap.servers", kafkaAddress); props.setProperty("group.id",kafkaGroup); FlinkKafkaConsumer consumer = new FlinkKafkaConsumer<>(topic, new SimpleStringSc