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The dataset generation failed because of a cast error
Error code: DatasetGenerationCastError
Exception: DatasetGenerationCastError
Message: An error occurred while generating the dataset
All the data files must have the same columns, but at some point there are 5 new columns ({'data_source', 'ability', 'reward_model', 'extra_info', 'prompt'}) and 3 missing columns ({'reason', 'source', 'problem'}).
This happened while the json dataset builder was generating data using
hf://datasets/dusersad12/verl-math-mix/verl_math_mix.jsonl (at revision 98c43df03021e240f8b052b90b9973de91ed6981), ['hf://datasets/dusersad12/verl-math-mix@98c43df03021e240f8b052b90b9973de91ed6981/skipped_samples.json', 'hf://datasets/dusersad12/verl-math-mix@98c43df03021e240f8b052b90b9973de91ed6981/verl_math_mix.jsonl'], ['hf://datasets/dusersad12/verl-math-mix@98c43df03021e240f8b052b90b9973de91ed6981/skipped_samples.json', 'hf://datasets/dusersad12/verl-math-mix@98c43df03021e240f8b052b90b9973de91ed6981/verl_math_mix.jsonl']
Please either edit the data files to have matching columns, or separate them into different configurations (see docs at https://hf.co/docs/hub/datasets-manual-configuration#multiple-configurations)
Traceback: Traceback (most recent call last):
File "/usr/local/lib/python3.14/site-packages/datasets/builder.py", line 1848, in _prepare_split_single
writer.write_table(table)
~~~~~~~~~~~~~~~~~~^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/arrow_writer.py", line 765, in write_table
self._write_table(pa_table, writer_batch_size=writer_batch_size)
~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/arrow_writer.py", line 773, in _write_table
pa_table = table_cast(pa_table, self._schema)
File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2378, in table_cast
return cast_table_to_schema(table, schema)
File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2306, in cast_table_to_schema
raise CastError(
...<3 lines>...
)
datasets.table.CastError: Couldn't cast
data_source: string
prompt: list<item: struct<role: string, content: string>>
child 0, item: struct<role: string, content: string>
child 0, role: string
child 1, content: string
ability: string
reward_model: struct<style: string, ground_truth: string>
child 0, style: string
child 1, ground_truth: string
extra_info: struct<index: int64, solution: string>
child 0, index: int64
child 1, solution: string
to
{'source': Value('string'), 'reason': Value('string'), 'problem': Value('string')}
because column names don't match
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/src/services/worker/src/worker/job_runners/config/parquet_and_info.py", line 1369, in compute_config_parquet_and_info_response
parquet_operations, partial, estimated_dataset_info = stream_convert_to_parquet(
~~~~~~~~~~~~~~~~~~~~~~~~~^
builder, max_dataset_size_bytes=max_dataset_size_bytes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
)
^
File "/src/services/worker/src/worker/job_runners/config/parquet_and_info.py", line 948, in stream_convert_to_parquet
builder._prepare_split(split_generator=splits_generators[split], file_format="parquet")
~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/builder.py", line 1694, in _prepare_split
for job_id, done, content in self._prepare_split_single(
~~~~~~~~~~~~~~~~~~~~~~~~~~^
gen_kwargs=gen_kwargs, job_id=job_id, **_prepare_split_args
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
):
^
File "/usr/local/lib/python3.14/site-packages/datasets/builder.py", line 1850, in _prepare_split_single
raise DatasetGenerationCastError.from_cast_error(
...<4 lines>...
)
datasets.exceptions.DatasetGenerationCastError: An error occurred while generating the dataset
All the data files must have the same columns, but at some point there are 5 new columns ({'data_source', 'ability', 'reward_model', 'extra_info', 'prompt'}) and 3 missing columns ({'reason', 'source', 'problem'}).
This happened while the json dataset builder was generating data using
hf://datasets/dusersad12/verl-math-mix/verl_math_mix.jsonl (at revision 98c43df03021e240f8b052b90b9973de91ed6981), ['hf://datasets/dusersad12/verl-math-mix@98c43df03021e240f8b052b90b9973de91ed6981/skipped_samples.json', 'hf://datasets/dusersad12/verl-math-mix@98c43df03021e240f8b052b90b9973de91ed6981/verl_math_mix.jsonl'], ['hf://datasets/dusersad12/verl-math-mix@98c43df03021e240f8b052b90b9973de91ed6981/skipped_samples.json', 'hf://datasets/dusersad12/verl-math-mix@98c43df03021e240f8b052b90b9973de91ed6981/verl_math_mix.jsonl']
Please either edit the data files to have matching columns, or separate them into different configurations (see docs at https://hf.co/docs/hub/datasets-manual-configuration#multiple-configurations)Need help to make the dataset viewer work? Make sure to review how to configure the dataset viewer, and open a discussion for direct support.
source string | reason string | problem string |
|---|---|---|
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If the o |
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