nielm commented on PR #21748:
URL: https://github.com/apache/beam/pull/21748#issuecomment-1152604885
Unable to serialize a MapElements function?!
Weird.
Didn't see that in my local testing, nor when I ran integration tests on
dataflow...
Will investigate further...
```
java.lang.IllegalArgumentException: unable to serialize
DoFnWithExecutionInformation{doFn=org.apache.beam.sdk.transforms.MapElements$1@7e8011e2,
mainOutputTag=Tag<output>, sideInputMapping={},
schemaInformation=DoFnSchemaInformation{elementConverters=[],
fieldAccessDescriptor=*}}
```
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