Stream Processing

ksqlDB ksqlDB is the event streaming database purpose-built for stream processing applications. It’s available both as a managed service in Confluent Cloud, or you can run it yourself. Apache Flink® Let’s talk about about Apache Flink®! Kafka Streams Kafka Streams is a client library for building applications and microservices, where the input and output data are stored in an Apache Kafka® cluster. It combines the simplicity of writing and deploying standard Java and Scala applications on the client side with the benefits of Kafka’s server-side cluster technology.

Topic	Replies	Views	Activity
About the Stream Processing category Stream Processing	0	1973	25 May 2023
Does a tombstone in toTable() propagate to downstream groupBy/aggregate if the key never existed? Kafka Streams	1	3	29 January 2026
Issue consuming Avro Apache Flink®	1	12	14 January 2026
Reading windowed topic into a global store Stream Processing	6	36	10 December 2025
Using ConsumerTimestampsInterceptor with kafka Streams Kafka Streams	1	42	12 November 2025
Messages processing more than once in a exactly_once kafka streams application Kafka Streams	8	3089	17 October 2025
Looking for feedback? What are your most common pain points in Apache Kafka? Stream Processing	1	48	17 October 2025
Kafka Streams main consumer fetch rate stays low after GlobalKTable (RocksDB) restore Kafka Streams	0	16	1 October 2025
KSQLDB Processing Time ksqlDB	1	23	13 October 2025
Using Json Value_format in KsqlDB I can see the topic messages null in stream ksqlDB	1	12	28 September 2025
Are records with a matching key from different inputs processed by the same node instances? Kafka Streams	2	33	20 August 2025
Problem with exactly-once semantics in kafka-streams Kafka Streams	4	102	11 August 2025
Sliding window aggregation not counting back down to zero Kafka Streams	5	47	6 August 2025
Avoiding RecordTooLargeException on Kafka Streams Kafka Streams	4	94	28 July 2025
Why Term Consume? Kafka Streams	1	24	24 July 2025
Running a select query throwing error in control center console ksqlDB	5	17	15 August 2025
Kafka streams design question related to Global Ktable Kafka Streams	0	33	9 July 2025
Kafka Streams KTable Race Condition: Multiple Concurrent Updates See Same Stale State Kafka Streams	1	22	23 June 2025
Multiple consumers, single partition Stream Processing	1	37	18 June 2025
Performance impact of filtering out unnecessary records from KTable before joining Kafka Streams	3	33	28 May 2025
Concurrent message processing Kafka Streams	4	52	28 May 2025
Adding in Strimzi Callback Handler ksqlDB	1	31	26 June 2025
Passthrough null values Kafka Streams	2	27	25 May 2025
Change of how global-store is read from kafka in kafka-streams 3.8.1 Kafka Streams	9	114	25 May 2025
Global Ktable changelog topic retention vs Kafka topic retention Kafka Streams	12	196	25 May 2025
Custom names for intermediate FK-Join topics Kafka Streams	4	35	13 May 2025
Kafka Streams - How to destroy prototype bean Kafka Streams	0	17	12 May 2025
Json Schema Serde not publishing to topic Kafka Streams	3	35	11 May 2025
Kafka events for the same key landing on different pods post-migration causing inconsistent processing Kafka Streams	2	27	8 May 2025
Tumbling window and suppress Kafka Streams	8	134	8 May 2025