hoangvu-ct commented on issue #26836:
URL: https://github.com/apache/beam/issues/26836#issuecomment-1567754693
@liferoad It seems like `beam.Create` does not reproduce the issue.
`beam.ReadFromTextFile` does:
```python
import apache_beam as beam
with beam.Pipeline() as pipeline:
batches_with_keys = (
pipeline
| "Create produce" >> beam.io.ReadFromText(file_pattern='test.jsonl')
| "Key by season" >> beam.Map(lambda e: (e["key"], e))
| "Group key" >> beam.GroupIntoBatches(2, 1)
| beam.Map(print)
)
```
The `test.jsonl` file:
```jsonl
{"key": "spring", "value": "🍓"}
{"key": "spring", "value": "🥕"}
{"key": "spring", "value": "🍆"}
{"key": "summer", "value": "🥕"}
{"key": "summer", "value": "🍅"}
{"key": "spring", "value": "🍅"}
{"key": "summer", "value": "🌽"}
{"key": "summer", "value": "🌽"}
{"key": "fall", "value": "🥕"}
{"key": "fall", "value": "🍅"}
{"key": "winter", "value": "🍆"}
```
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