damnMeddlingKid opened a new issue, #30469:
URL: https://github.com/apache/beam/issues/30469
### What happened?
## Issue
When running a pipeline with KafkaIO and withDynamicReads enabled I get the
following error in Dataflow on Runner V2
```
Exception in thread "main" java.lang.IllegalStateException:
The current runner does not support SDF-based Kafka read properly and the
replacement runner lacks the support for the following properties:
[DYNAMIC_READ, WATCH_TOPIC_PARTITION_DURATION].
For example if you are using Dataflow then consider using Dataflow Runner
v2.; see consecutive INFO logs for details.
```
This is despite setting the `use_runner_v2` and `beam_fn_api` experiment
flags.
Steps to reproduce:
1) Create a pipeline with KafkaIO and dynamic reads, heres my configuration
```
KafkaIO
.read[Array[Byte], Array[Byte]]
.withBootstrapServers(kafkaBootstrapServers)
.withDynamicRead(Duration.standardMinutes(15))
.withTopics(kafkaTopics.asJava)
.withReadCommitted()
.withConsumerConfigUpdates(kafkaConsumerProperties.toMap[String,
AnyRef].asJava)
.commitOffsetsInFinalize
.withKeyDeserializer(classOf[ByteArrayDeserializer])
.withValueDeserializer(classOf[ByteArrayDeserializer])
```
2) Enable experiment flags for runner v2 and beam function api:
`use_runner_v2`, `beam_fn_api`
3) Run the pipeline in Dataflow
## Investigation
I believe this error is happening because beam always [replaces V1
transforms](https://github.com/apache/beam/blob/935ca9c58d61e5d070056d36c21c6b6c03a97908/runners/google-cloud-dataflow-java/src/main/java/org/apache/beam/runners/dataflow/DataflowRunner.java#L1227C1-L1229C35)
and the transform replacement for V1 is a non-SDF based reader that doesn't
support dynamic reads.
so when the replacement is attempted [Beam correctly
validates](https://github.com/apache/beam/blob/master/sdks/java/io/kafka/src/main/java/org/apache/beam/sdk/io/kafka/KafkaIO.java#L1539-L1543)
that the replacement is not compatible with Dynamic Reads and throws a
compatibility exception.
I would like to propose that we only make this replacement for runner v1
like so https://github.com/damnMeddlingKid/beam/pull/1/files
```
if (!hasExperiment(options, "use_runner_v2")) {
overridesBuilder.add(KafkaIO.Read.KAFKA_READ_OVERRIDE);
}
```
### Issue Priority
Priority: 3 (minor)
### Issue Components
- [ ] Component: Python SDK
- [X] Component: Java SDK
- [ ] Component: Go SDK
- [ ] Component: Typescript SDK
- [ ] Component: IO connector
- [ ] Component: Beam YAML
- [ ] Component: Beam examples
- [ ] Component: Beam playground
- [ ] Component: Beam katas
- [ ] Component: Website
- [ ] Component: Spark Runner
- [ ] Component: Flink Runner
- [ ] Component: Samza Runner
- [ ] Component: Twister2 Runner
- [ ] Component: Hazelcast Jet Runner
- [X] Component: Google Cloud Dataflow Runner
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