Stream Processing

Apache Flink® Let’s talk about about Apache Flink®! 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. 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	2015	25 May 2023
ksqlDB JSON_SR with existing KEY_SCHEMA_ID fails on structured key: Incompatible schema of type JSON / id.compatibility.strict ksqlDB	0	124	17 May 2026
Kafka Streams EOS - Producer fenced Kafka Streams	4	298	16 April 2026
Kafka Streams FK-join: force result timestamp to always come from main (left) flow Kafka Streams	5	298	20 March 2026
KTable-KTable Foreign-Key LEFT JOIN: Discrepancy between documentation and behavior when FK is NULL Kafka Streams	1	181	20 March 2026
Unable to migrate metadata from zookeeper to KRaft Kafka Streams	0	132	13 March 2026
Kafka Streams and Schemaregistry interaction, multiple teams, languages Kafka Streams	2	293	6 March 2026
Kafka Streams - bizarre data loss Kafka Streams	8	437	5 March 2026
CompleteBatch Infinite Loop With BatchSize Greater Than 1 Kafka Streams	6	215	2 February 2026
Does a tombstone in toTable() propagate to downstream groupBy/aggregate if the key never existed? Kafka Streams	3	116	2 February 2026
Issue consuming Avro Apache Flink®	1	109	14 January 2026
Reading windowed topic into a global store Stream Processing	5	125	10 December 2025
Using ConsumerTimestampsInterceptor with kafka Streams Kafka Streams	1	128	12 November 2025
Messages processing more than once in a exactly_once kafka streams application Kafka Streams	7	3542	15 October 2025
Looking for feedback? What are your most common pain points in Apache Kafka? Stream Processing	0	117	17 October 2025
Kafka Streams main consumer fetch rate stays low after GlobalKTable (RocksDB) restore Kafka Streams	0	78	1 October 2025
KSQLDB Processing Time ksqlDB	0	85	13 September 2025
Using Json Value_format in KsqlDB I can see the topic messages null in stream ksqlDB	0	65	29 August 2025
Are records with a matching key from different inputs processed by the same node instances? Kafka Streams	1	116	20 August 2025
Problem with exactly-once semantics in kafka-streams Kafka Streams	4	306	11 August 2025
Sliding window aggregation not counting back down to zero Kafka Streams	5	165	6 August 2025
Avoiding RecordTooLargeException on Kafka Streams Kafka Streams	4	283	28 July 2025
Why Term Consume? Kafka Streams	1	106	24 July 2025
Running a select query throwing error in control center console ksqlDB	0	82	16 July 2025
Kafka streams design question related to Global Ktable Kafka Streams	0	93	9 July 2025
Kafka Streams KTable Race Condition: Multiple Concurrent Updates See Same Stale State Kafka Streams	1	103	23 June 2025
Multiple consumers, single partition Stream Processing	1	128	18 June 2025
Performance impact of filtering out unnecessary records from KTable before joining Kafka Streams	2	107	28 May 2025
Concurrent message processing Kafka Streams	4	161	28 May 2025
Adding in Strimzi Callback Handler ksqlDB	0	95	27 May 2025