cona-bear opened a new issue, #36026:
URL: https://github.com/apache/beam/issues/36026
### What happened?
Hello, I was trying to use managed I/O in Dataflow. and had difficulty to
resolve this issue.
Here's my sample code for dataflow.
```python
import apache_beam as beam
from apache_beam import Row
from apache_beam.transforms import managed
from apache_beam.options.pipeline_options import PipelineOptions,
GoogleCloudOptions
opts = # set google cloud option
with beam.Pipeline(options=opts) as p:
rows = (
p
| "CreateRows" >> beam.Create([
{"id": "a", "name": "Alice", "value": 100},
{"id": "b", "name": "Bob", "value": 200},
])
# | "ToRow" >> beam.Map(lambda x: Row(id=str(x["id"]),
name=str(x["name"]), value=int(x["value"]))) # this works.
| "ToRow" >> beam.Map(lambda x: Row(**x)) # this does not work.
)
_ = rows | "WriteToBQ" >> managed.Write(
managed.BIGQUERY,
config={
"table": "myproject:mydataset.mytable",
"keep": ["id", "name", "value"],
},
)
```
2nd threw an error in `managed.Write` like this
```
raise RuntimeError(_sanitize_java_traceback(response.error))
RuntimeError: java.lang.IllegalStateException: Cannot call getSchema when
there is no schema
at
org.apache.beam.sdk.values.PCollection.getSchema(PCollection.java:325)
at
org.apache.beam.sdk.io.gcp.bigquery.providers.BigQueryFileLoadsSchemaTransformProvider$BigQueryFileLoadsSchemaTransform.expand(BigQueryFileLoadsSchemaTransformProvider.java:93)
at
org.apache.beam.sdk.io.gcp.bigquery.providers.BigQueryFileLoadsSchemaTransformProvider$BigQueryFileLoadsSchemaTransform.expand(BigQueryFileLoadsSchemaTransformProvider.java:78)
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.io.gcp.bigquery.providers.BigQueryWriteSchemaTransformProvider$BigQueryWriteSchemaTransform.expand(BigQueryWriteSchemaTransformProvider.java:66)
at
org.apache.beam.sdk.io.gcp.bigquery.providers.BigQueryWriteSchemaTransformProvider$BigQueryWriteSchemaTransform.expand(BigQueryWriteSchemaTransformProvider.java:55)
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.IllegalStateException: Cannot call getSchema when there is no
schema
```
And I have no idea why this occurs. Can anyone help me?
### Issue Priority
Priority: 2 (default / most bugs should be filed as P2)
### Issue Components
- [x] Component: Python SDK
- [ ] Component: Java SDK
- [ ] Component: Go SDK
- [ ] Component: Typescript SDK
- [x] Component: IO connector
- [ ] 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
- [x] 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: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
