charlespnh opened a new issue, #35185:
URL: https://github.com/apache/beam/issues/35185
### What happened?
```
pipeline:
type: chain
transforms:
- type: ReadFromKafka
name: ReadFromMyTopic
config:
format: JSON
schema: |
{
"type": "object",
"properties": {
"value": {"type": "string"}
}
}
topic: test
bootstrap_servers: kafka:9092
auto_offset_reset_config: earliest
- type: LogForTesting
```
Run this pipeline on prism runner
```
python -m apache_beam.yaml.main \
--yaml_pipeline_file=sdks/python/apache_beam/yaml/examples/transforms/io/kafka_read.yaml
\
--runner PrismRunner
```
... gives `java.util.ConcurrentModificationException`:
```
RuntimeError: Pipeline job-001 failed in state FAILED: bundle inst004
stage-002 failed:org.apache.beam.sdk.util.UserCodeException:
java.util.ConcurrentModificationException: KafkaConsumer is not safe for
multi-threaded access. currentThread(name: pool-2-thread-6, id: 33)
otherThread(id: 32)
at
org.apache.beam.sdk.util.UserCodeException.wrap(UserCodeException.java:39)
at
org.apache.beam.sdk.io.kafka.ReadFromKafkaDoFn$Unbounded$DoFnInvoker.invokeProcessElement(Unknown
Source)
at
org.apache.beam.fn.harness.FnApiDoFnRunner.processElementForWindowObservingSizedElementAndRestriction(FnApiDoFnRunner.java:1123)
at
org.apache.beam.fn.harness.FnApiDoFnRunner.access$1500(FnApiDoFnRunner.java:145)
at
org.apache.beam.fn.harness.FnApiDoFnRunner$4.accept(FnApiDoFnRunner.java:658)
at
org.apache.beam.fn.harness.FnApiDoFnRunner$4.accept(FnApiDoFnRunner.java:653)
at
org.apache.beam.fn.harness.data.PCollectionConsumerRegistry$MetricTrackingFnDataReceiver.accept(PCollectionConsumerRegistry.java:348)
at
org.apache.beam.fn.harness.data.PCollectionConsumerRegistry$MetricTrackingFnDataReceiver.accept(PCollectionConsumerRegistry.java:275)
at
org.apache.beam.fn.harness.BeamFnDataReadRunner.forwardElementToConsumer(BeamFnDataReadRunner.java:211)
at
org.apache.beam.sdk.fn.data.BeamFnDataInboundObserver.multiplexElements(BeamFnDataInboundObserver.java:231)
at
org.apache.beam.sdk.fn.data.BeamFnDataInboundObserver.awaitCompletion(BeamFnDataInboundObserver.java:185)
at
org.apache.beam.fn.harness.control.ProcessBundleHandler.processBundle(ProcessBundleHandler.java:543)
at
org.apache.beam.fn.harness.control.BeamFnControlClient.delegateOnInstructionRequestType(BeamFnControlClient.java:150)
at
org.apache.beam.fn.harness.control.BeamFnControlClient$InboundObserver.lambda$onNext$0(BeamFnControlClient.java:115)
at
java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at
org.apache.beam.sdk.util.UnboundedScheduledExecutorService$ScheduledFutureTask.run(UnboundedScheduledExecutorService.java:163)
at
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:840)
Caused by: java.util.ConcurrentModificationException: KafkaConsumer is not
safe for multi-threaded access. currentThread(name: pool-2-thread-6, id: 33)
otherThread(id: 32)
at
org.apache.kafka.clients.consumer.internals.ClassicKafkaConsumer.acquire(ClassicKafkaConsumer.java:1232)
at
org.apache.kafka.clients.consumer.internals.ClassicKafkaConsumer.acquireAndEnsureOpen(ClassicKafkaConsumer.java:1213)
at
org.apache.kafka.clients.consumer.internals.ClassicKafkaConsumer.resume(ClassicKafkaConsumer.java:965)
at
org.apache.kafka.clients.consumer.KafkaConsumer.resume(KafkaConsumer.java:1524)
at
org.apache.beam.sdk.io.kafka.ReadFromKafkaDoFn.processElement(ReadFromKafkaDoFn.java:593)
```
Regardless if there's data read or not from the topic, it will give this
exception.
### Issue Priority
Priority: 2 (default / most bugs should be filed as P2)
### Issue Components
- [ ] Component: Python SDK
- [x] Component: Java SDK
- [ ] Component: Go SDK
- [ ] Component: Typescript SDK
- [x] 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
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