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The dataset generation failed
Error code:   DatasetGenerationError
Exception:    ArrowNotImplementedError
Message:      Cannot write struct type 'drop_reasons' with no child field to Parquet. Consider adding a dummy child field.
Traceback:    Traceback (most recent call last):
                File "/usr/local/lib/python3.12/site-packages/datasets/builder.py", line 1821, in _prepare_split_single
                  num_examples, num_bytes = writer.finalize()
                                            ^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.12/site-packages/datasets/arrow_writer.py", line 781, in finalize
                  self.write_rows_on_file()
                File "/usr/local/lib/python3.12/site-packages/datasets/arrow_writer.py", line 663, in write_rows_on_file
                  self._write_table(table)
                File "/usr/local/lib/python3.12/site-packages/datasets/arrow_writer.py", line 771, in _write_table
                  self._build_writer(inferred_schema=pa_table.schema)
                File "/usr/local/lib/python3.12/site-packages/datasets/arrow_writer.py", line 812, in _build_writer
                  self.pa_writer = pq.ParquetWriter(
                                   ^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.12/site-packages/pyarrow/parquet/core.py", line 1070, in __init__
                  self.writer = _parquet.ParquetWriter(
                                ^^^^^^^^^^^^^^^^^^^^^^^
                File "pyarrow/_parquet.pyx", line 2363, in pyarrow._parquet.ParquetWriter.__cinit__
                File "pyarrow/error.pxi", line 155, in pyarrow.lib.pyarrow_internal_check_status
                File "pyarrow/error.pxi", line 92, in pyarrow.lib.check_status
              pyarrow.lib.ArrowNotImplementedError: Cannot write struct type 'drop_reasons' with no child field to Parquet. Consider adding a dummy child field.
              
              The above exception was the direct cause of the following exception:
              
              Traceback (most recent call last):
                File "/src/services/worker/src/worker/job_runners/config/parquet_and_info.py", line 1347, in compute_config_parquet_and_info_response
                  parquet_operations = convert_to_parquet(builder)
                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^
                File "/src/services/worker/src/worker/job_runners/config/parquet_and_info.py", line 980, in convert_to_parquet
                  builder.download_and_prepare(
                File "/usr/local/lib/python3.12/site-packages/datasets/builder.py", line 882, in download_and_prepare
                  self._download_and_prepare(
                File "/usr/local/lib/python3.12/site-packages/datasets/builder.py", line 943, in _download_and_prepare
                  self._prepare_split(split_generator, **prepare_split_kwargs)
                File "/usr/local/lib/python3.12/site-packages/datasets/builder.py", line 1646, in _prepare_split
                  for job_id, done, content in self._prepare_split_single(
                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.12/site-packages/datasets/builder.py", line 1832, in _prepare_split_single
                  raise DatasetGenerationError("An error occurred while generating the dataset") from e
              datasets.exceptions.DatasetGenerationError: An error occurred while generating the dataset

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generated_at
string
kind
string
tokenizer_dir
string
output_dir
string
tokenized_bin
string
dtype
string
target_tokens
int64
actual_tokens
int64
file_size_bytes
int64
vocab_size
int64
max_token_id
int64
eos_token_id
int64
documents
int64
source_targets
dict
source_stats
dict
mixing_strategy
string
cleaning
dict
seed
int64
source_order_preview
list
source_switches
int64
truncated_documents
int64
elapsed_sec
float64
passed
bool
fail_reasons
list
2026-05-08 16:37:44 UTC
continue_pretrain_tokenized
/data/v2/tokenizer
/data/v2/continue_full
/data/v2/continue_full/tokenized.bin
uint16
1,194,000,000
1,194,000,000
2,388,000,000
48,000
47,999
0
1,203,778
{ "replay": 300000000, "wikipedia_zh": 394000000, "cosmopedia_chinese": 500000000 }
{ "replay": { "target_tokens": 300000000, "raw_docs_seen": 390470, "kept_docs": 390470, "dropped_docs": 0, "clean_chars": 522475091, "tokens": 300000000, "eos_count": 390469, "samples": [ { "id": null, "title": null, "tokens": 576, "chars": 847, ...
document_level_lowest_fill_fraction_after_cleaning
{ "replay": "reuse cleaned base raw text; light safety filters", "wikipedia_zh": "OpenCC t2s + tail-section/list/markup/disambiguation filters", "cosmopedia_chinese": "OpenCC t2s + list/markdown/template density filters" }
42
[ "replay", "wikipedia_zh", "cosmopedia_chinese", "replay", "replay", "replay", "cosmopedia_chinese", "replay", "cosmopedia_chinese", "replay", "replay", "wikipedia_zh", "cosmopedia_chinese", "replay", "replay", "cosmopedia_chinese", "replay", "cosmopedia_chinese", "replay", "cos...
824,032
3
8,453.146939
true
[]