charlespnh opened a new issue, #35190: URL: https://github.com/apache/beam/issues/35190
### What happened? ``` pipeline: type: chain transforms: - type: ReadFromKafka name: ReadFromMyTopic config: format: STRING topic: test bootstrap_servers: kafka:9092 # 10.128.0.13:9092 auto_offset_reset_config: earliest - type: LogForTesting ``` Running the pipeline (Beam 2.65.0) gives this unexpected error: ``` File "/home/beam/scripts/kafka-iceberg-spark/local/env/lib/python3.10/site-packages/apache_beam/yaml/yaml_transform.py", line 509, in expand_leaf_transform raise ValueError( ValueError: Error applying transform "ReadFromMyTopic" at line 4: java.lang.NullPointerException: To read from Kafka in AVRO format, you must provide a schema. at org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.base.Preconditions.checkNotNull(Preconditions.java:921) at org.apache.beam.sdk.io.kafka.KafkaReadSchemaTransformConfiguration.validate(KafkaReadSchemaTransformConfiguration.java:83) at org.apache.beam.sdk.io.kafka.KafkaReadSchemaTransformProvider$KafkaReadSchemaTransform.expand(KafkaReadSchemaTransformProvider.java:156) at org.apache.beam.sdk.io.kafka.KafkaReadSchemaTransformProvider$KafkaReadSchemaTransform.expand(KafkaReadSchemaTransformProvider.java:133) at org.apache.beam.sdk.Pipeline.applyInternal(Pipeline.java:559) at org.apache.beam.sdk.Pipeline.applyTransform(Pipeline.java:490) at org.apache.beam.sdk.values.PCollectionRowTuple.apply(PCollectionRowTuple.java:215) at org.apache.beam.sdk.managed.ManagedSchemaTransformProvider$ManagedSchemaTransform.expand(ManagedSchemaTransformProvider.java:184) at org.apache.beam.sdk.managed.ManagedSchemaTransformProvider$ManagedSchemaTransform.expand(ManagedSchemaTransformProvider.java:155) at org.apache.beam.sdk.Pipeline.applyInternal(Pipeline.java:559) at org.apache.beam.sdk.Pipeline.applyTransform(Pipeline.java:507) at org.apache.beam.sdk.expansion.service.TransformProvider.apply(TransformProvider.java:121) at org.apache.beam.sdk.expansion.service.ExpansionService.expand(ExpansionService.java:657) at org.apache.beam.sdk.expansion.service.ExpansionService.expand(ExpansionService.java:758) at org.apache.beam.model.expansion.v1.ExpansionServiceGrpc$MethodHandlers.invoke(ExpansionServiceGrpc.java:306) at org.apache.beam.vendor.grpc.v1p69p0.io.grpc.stub.ServerCalls$UnaryServerCallHandler$UnaryServerCallListener.onHalfClose(ServerCalls.java:182) at org.apache.beam.vendor.grpc.v1p69p0.io.grpc.internal.ServerCallImpl$ServerStreamListenerImpl.halfClosed(ServerCallImpl.java:356) at org.apache.beam.vendor.grpc.v1p69p0.io.grpc.internal.ServerImpl$JumpToApplicationThreadServerStreamListener$1HalfClosed.runInContext(ServerImpl.java:861) at org.apache.beam.vendor.grpc.v1p69p0.io.grpc.internal.ContextRunnable.run(ContextRunnable.java:37) at org.apache.beam.vendor.grpc.v1p69p0.io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:133) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) at java.base/java.lang.Thread.run(Thread.java:840) java.lang.NullPointerException: To read from Kafka in AVRO format, you must provide a schema. ``` We're not checking for the STRING format here https://github.com/apache/beam/blob/master/sdks/java/io/kafka/src/main/java/org/apache/beam/sdk/io/kafka/KafkaReadSchemaTransformConfiguration.java#L50-L85... ### Issue Priority Priority: 2 (default / most bugs should be filed as P2) ### Issue Components - [ ] Component: Python SDK - [ ] Component: Java SDK - [ ] Component: Go SDK - [ ] Component: Typescript SDK - [ ] Component: IO connector - [x] Component: Beam YAML - [ ] Component: Beam examples - [ ] Component: Beam playground - [ ] Component: Beam katas - [ ] Component: Website - [ ] Component: Infrastructure - [ ] Component: Spark Runner - [ ] Component: Flink Runner - [ ] Component: Samza Runner - [ ] Component: Twister2 Runner - [ ] Component: Hazelcast Jet Runner - [ ] Component: Google Cloud Dataflow Runner -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: github-unsubscr...@beam.apache.org.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org