stiv1qaz1 opened a new issue, #26318:
URL: https://github.com/apache/beam/issues/26318
### What happened?
When BigQueryIO tries to convert a structure to an Avro schema, it generates
a schema for the structure. However, when BigQueryIO tries to convert the
schema to a string, it crashes with an error.
It cannot convert schemas that reuse group field names in inner structures.
This is because Avro record types must have unique names, and the converter
creates an Avro record schema in this case. The result is an invalid Avro
schema.
The `org.apache.avro.Schema$Names` map is a map that stores the names of the
fields in an Avro schema. When the code tries to register the identifier
org.apache.beam.sdk.io.gcp.bigquery.identifier twice in the map, it causes a
collision resulting in the following stack trace downstream:
```
Caused by: org.apache.avro.SchemaParseException: Can't redefine: list
at org.apache.avro.Schema$Names.put(Schema.java:1586)
at org.apache.avro.Schema$NamedSchema.writeNameRef(Schema.java:844)
at org.apache.avro.Schema$RecordSchema.toJson(Schema.java:1011)
at org.apache.avro.Schema$UnionSchema.toJson(Schema.java:1278)
at org.apache.avro.Schema$RecordSchema.fieldsToJson(Schema.java:1039)
at org.apache.avro.Schema$RecordSchema.toJson(Schema.java:1023)
at org.apache.avro.Schema$ArraySchema.toJson(Schema.java:1173)
at org.apache.avro.Schema$RecordSchema.fieldsToJson(Schema.java:1039)
at org.apache.avro.Schema$RecordSchema.toJson(Schema.java:1023)
at org.apache.avro.Schema$ArraySchema.toJson(Schema.java:1173)
at org.apache.avro.Schema$RecordSchema.fieldsToJson(Schema.java:1039)
at org.apache.avro.Schema$RecordSchema.toJson(Schema.java:1023)
at org.apache.avro.Schema$UnionSchema.toJson(Schema.java:1278)
at org.apache.avro.Schema$RecordSchema.fieldsToJson(Schema.java:1039)
at org.apache.avro.Schema$RecordSchema.toJson(Schema.java:1023)
at org.apache.avro.Schema$ArraySchema.toJson(Schema.java:1173)
at org.apache.avro.Schema$RecordSchema.fieldsToJson(Schema.java:1039)
at org.apache.avro.Schema$RecordSchema.toJson(Schema.java:1023)
at org.apache.avro.Schema.toString(Schema.java:433)
at org.apache.avro.Schema.toString(Schema.java:405)
at org.apache.avro.Schema.toString(Schema.java:396)
at
org.apache.beam.sdk.io.gcp.bigquery.BigQuerySourceBase.createSources(BigQuerySourceBase.java:241)
at
org.apache.beam.sdk.io.gcp.bigquery.BigQuerySourceBase.split(BigQuerySourceBase.java:164)
at
org.apache.beam.runners.direct.BoundedReadEvaluatorFactory$InputProvider.getInitialInputs(BoundedReadEvaluatorFactory.java:217)
at
org.apache.beam.runners.direct.ReadEvaluatorFactory$InputProvider.getInitialInputs(ReadEvaluatorFactory.java:88)
at
org.apache.beam.runners.direct.RootProviderRegistry.getInitialInputs(RootProviderRegistry.java:80)
```
This happened for Beam versions: `2.43,2.44,2.45,2.46`
### 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
- [X] Component: IO connector
- [ ] 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
- [ ] Component: Google Cloud Dataflow Runner
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