Hi: I am using RocksDbSessionBytesStoreSupplier in my kafka streaming application for an aggregation like this:
var materialized = Materialized.<String, List<CDCRecord>>as( new RocksDbSessionBytesStoreSupplier(env.getProperty("messages.cdc.pft.topic", "NASHCM.PAYROLL.PFT.FILENUMBER"), Duration.parse(env.getProperty("pft.duration", "P7D")).toMillis())) .withKeySerde(stringSerde) .withValueSerde(listSerde); stream.windowedBy(SessionWindows .with(Duration.parse(env.getProperty("pft.gap", "PT0.1S"))) .grace(Duration.parse(env.getProperty("pft.duration", "PT0.05S"))) ) .aggregate(ArrayList::new, (k, v, list)->{list.add(v); return list;}, (k, list1, list2)->{list1.addAll(list2); return list1;}, materialized) .toStream().foreach((key, value) -> { //sometimes value is null, but this should never happened – and we do see some messages not processed. } The application runs on Kubernetes, should we not use RocksDbSessionBytesStoreSupplier? Thanks Andrew This message and any attachments are intended only for the use of the addressee and may contain information that is privileged and confidential. If the reader of the message is not the intended recipient or an authorized representative of the intended recipient, you are hereby notified that any dissemination of this communication is strictly prohibited. If you have received this communication in error, notify the sender immediately by return email and delete the message and any attachments from your system.