Issues

• [Security] SIGSEGV (memory corruption/DoS) parsing untrusted parquet: cencoding.read_rle width overflow

  dask/fastparquet#985 · Filter by author plotarmordev opened on Aug 14, 2026
  2

• import fails when cramjam is built without gzip support

  dask/fastparquet#984 · Filter by author dkg opened on Jul 23, 2026
  1

• Deprecation warning in version 2026.5.0 with numpy 2.5.1 The 'generic' unit for NumPy timedelta is deprecated

  dask/fastparquet#983 · Filter by author evgenyneu opened on Jul 23, 2026
  3

• String saving problem in pandas 3.0

  dask/fastparquet#972 · Filter by author JBreidaks opened on Mar 6, 2026
  1

• TypeError: int() argument must be a string, a bytes-like object or a real number, not 'NAType'

  dask/fastparquet#959 · Filter by author brechtm opened on Jul 22, 2025
  3

• Issue loading partitioned data with values of RDx

  dask/fastparquet#958 · Filter by author tomjemmett opened on May 28, 2025
  2

• Bug when row-filtering with null values?

  dask/fastparquet#957 · Filter by author yohplala opened on Mar 26, 2025

• Better way to add options or implementations to the json encoders

  dask/fastparquet#955 · Filter by author paddymul opened on Mar 26, 2025
  2

• Wrong categories data on reading with engine='fastparquet'

  dask/fastparquet#949 · Filter by author ElnazVakhitov opened on Feb 24, 2025
  9

• Linting in fastparquet?

  dask/fastparquet#939 · Filter by author yohplala opened on Oct 29, 2024
  3

• The parquet format specification is not followed for Interval type (i.e. timedeltas)

  dask/fastparquet#937 · Filter by author mgab opened on Oct 3, 2024
  3

• iter_row_groups raises KeyError when dots in column names and data is not primitive

  dask/fastparquet#935 · Filter by author adrienDog opened on Sep 10, 2024
  11

• Categorical dtype not preserved with fastparquet-write, pyarrow-read

  dask/fastparquet#920 · Filter by author zmoon opened on Feb 11, 2024
  2

• Upcoming pandas (>2.2.0) raises "read-only" errors

  dask/fastparquet#919 · Filter by author martindurant opened on Feb 7, 2024
  3

• Loading List of List of Strings leads to nans

  dask/fastparquet#917 · Filter by author olegsinavski opened on Feb 3, 2024
  6

• PyArrow will become a required dependency with pandas 3.0

  dask/fastparquet#913 · Filter by author davetapley opened on Dec 27, 2023

• schema evolution when writing the row groups does not work

  dask/fastparquet#907 · Filter by author braindevices opened on Nov 22, 2023
  4

• Some fastparquet-related tests are failing on Python 3.10

  dask/fastparquet#896 · Filter by author jrbourbeau opened on Oct 26, 2023
  10

• Potential Parquet File Metadata Corruption After Process Timeout

  dask/fastparquet#879 · Filter by author alordthorsen opened on Aug 22, 2023
  7

• ValueError: Seek before start of file using custom open_with function or S3 file object

  dask/fastparquet#875 · Filter by author soerenbrandt opened on Jul 31, 2023
  3

• AttributeError: 'ParquetFile' object has no attribute '_columns_dtype' when reading files without pandas metadata

  dask/fastparquet#869 · Filter by author piotrb5e3 opened on Jun 26, 2023
  1

• TypeError: 'NoneType' object is not iterable

  dask/fastparquet#867 · Filter by author davetapley opened on Jun 5, 2023
  2

• [Question] Support for arrow data types when reading data with fastparquet

  dask/fastparquet#854 · Filter by author j-bennet opened on Mar 14, 2023
  5

• Expected unicode, got quoted_name

  dask/fastparquet#810 · Filter by author TrentGlover opened on Sep 28, 2022
  8

• Make _metadata optional on writing

  dask/fastparquet#809 · Filter by author martindurant opened on Sep 28, 2022
  29