apache/arrow

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Apache Arrow is the universal columnar format and multi-language toolbox for fast data interchange and in-memory analytics

Stars: 17.1k
Forks: 4.3k
Open beginner issues: 0
Indexed issues: 2.2k
Avg merge: 3d 13h
Merged PRs (30d): 88

Dominant language: C++
License: Apache-2.0
Last GitHub push: Sep 12, 2026
Latest indexed: Sep 14, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: good first issue

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2160 open issues indexed

[Python] pyarrow.parquet.read_table either returns FileNotFound or ArrowInvalid Open

Component: Parquet Component: Python Type: bug

apache/arrow#31339 · 13 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Can't build GTest tests on MacOS with Xcode Open

Component: C++ Type: bug

apache/arrow#31340 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Re-enable strftime locale test on Windows Open

Component: C++ Type: bug

apache/arrow#31351 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[RFC] [Java] Higher-level "DataFrame"-like API. Lower barrier to entry, increase adoption/audience and productivity. Open

apache/arrow#12618 · 12 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] RecordBatch::ValidateFull fails on nested StructArray Open

Component: C++ Type: bug

apache/arrow#31369 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] strptime rolls-over dates not in range for current month Open

Component: C++ Component: Python Component: R Priority: Critical Status: needs champion Type: bug

apache/arrow#31374 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Conversion from one dataset to another that will not fit in memory? Open

apache/arrow#12653 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Check nullability when validating fields on batches or struct arrays Open

Component: C++ good-first-issue good-second-issue Type: bug

apache/arrow#31387 · 8 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[C++][Python] Add conversion from RecordBatchFileReader to RecordBatchReader Open

Component: C++ Component: Python Type: enhancement

apache/arrow#31394 · 10 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Have JSON reader treat mixed singleton/array fields as arrays. Open

Component: C++ Component: Python Type: enhancement

apache/arrow#31403 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Test failure in arrow-compute-aggregate-test Open

Component: C++

apache/arrow#12681 · 26 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[R] Supper encoding options for CSVs in open_dataset Open

Component: R Type: task

apache/arrow#31415 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Temporal floor/ceil/round throws exception for timestamps ambiguous due to DST Open

Component: Python Type: bug

apache/arrow#31443 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Memory leak in `fragment.to_table` Open

Component: Parquet Component: Python Type: bug

apache/arrow#31448 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Possible memory leak in compute.take Open

Component: Python Type: bug

apache/arrow#31456 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Python] Include UDFOptions Open

Type: task

apache/arrow#31460 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Version=7.0.0 introduces bug when filtering by empty set during load Open

Component: Python Priority: Major Status: needs champion Type: bug

apache/arrow#31464 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[Dev] Add infrastructure for testing Git interactions in merge_arrow_pr.py Open

Component: Developer Tools Type: task

apache/arrow#20171 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Use tzdata timezone database on Windows Open

Component: C++ Component: Python Priority: Critical Type: enhancement

apache/arrow#31472 · 8 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
[Python]OSError: Unable to load libjvm. when used in windows Open

apache/arrow#12743 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] `tzinfo_to_string` should accept None Open

Component: Python Type: enhancement

apache/arrow#20172 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] ArrowInvalid error on reading partitioned parquet files with fsspec.adlfs (pyarrow-7.0.0) due to removed '/' in the ls of path Open

Component: Python Type: bug

apache/arrow#20176 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Incorrect results when reading a buffer of boolean values Open

Component: Python Type: bug

apache/arrow#31494 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Dump OpenTelemetry profiling summary to stdout Open

Component: C++ Type: task

apache/arrow#31497 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Calls to do_get ignore Python signal handlers Open

Component: FlightRPC Component: Python Type: bug

apache/arrow#20177 · 3 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
Possible gandiva function problem Open

Component: Gandiva Type: bug

apache/arrow#31500 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Gandiva][C++] Fix castINTERVALDAY and castINTERVALYEAR Open

Component: Gandiva Type: bug

apache/arrow#31518 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Vector kernels should implement or reject null_handling = INTERSECTION Open

Component: C++ good-second-issue Type: bug

apache/arrow#31552 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Overhead of std::shared_ptr<DataType> copies is causing thread contention Open

Component: C++ Type: task

apache/arrow#31567 · 12 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Archery] Add documentation for local development in archery/crossbow Open

Component: Developer Tools Status: needs champion Type: enhancement

apache/arrow#31575 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Replace ThreadIndexer with a more performant thread-local implementation Open

Component: C++ Type: bug

apache/arrow#31580 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Add a ThreadLocalState concept built on thread local Open

Component: C++ Type: task

apache/arrow#31581 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Migrate existing usage of ThreadIndexer to ThreadLocalState and get rid of ThreadIndexer Open

Type: task

apache/arrow#31582 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Allow to create field reference to nested fields that use indices Open

Component: Python Type: enhancement

apache/arrow#31583 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[C++][Gandiva] Fix size 0 case in arena malloc Open

Component: Gandiva Type: bug

apache/arrow#31593 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Fix nogil declarations on libarrow_python.pxd Open

Component: Python Type: task

apache/arrow#31597 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Python] Unregister compute functions Open

Component: C++ Component: Python Type: task

apache/arrow#31611 · 31 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Python] Register Multiple Kernels for a UDF Open

Component: C++ Component: Python Type: task

apache/arrow#31612 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Python] Generate scalar-argument kernel based on array-argument kernel for UDFs Open

Component: C++ Component: Python Type: task

apache/arrow#31613 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[R Package] map_batches in parallel Open

apache/arrow#12919 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] PyArrow: RuntimeError: AppendRowGroups requires equal schemas when writing _metadata file Open

Component: Parquet Type: bug

apache/arrow#31678 · 9 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[R] Dataset re-partitioning consumes considerable amount of memory Open

Component: R Type: bug

apache/arrow#31705 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Release][C++] Windows source verification should not mutate source tree Open

Component: C++ Component: Continuous Integration Component: Developer Tools Type: bug

apache/arrow#31707 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Docs] How to run CI builds locally - Windows Open

Component: Documentation Type: task

apache/arrow#31744 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Docs] How to run CI builds locally - Linux Open

Component: Documentation Type: task

apache/arrow#31745 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Docs] How to run CI builds locally - MacOS Open

Component: Documentation Type: task

apache/arrow#31746 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Docs] CI FAQ User Section Open

Component: Documentation Type: task

apache/arrow#31747 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Docs] CI FAQ Dev Section Open

Component: Documentation Type: task

apache/arrow#31748 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Docs] How to update & test PR CI Open

Component: Documentation Type: task

apache/arrow#31749 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Docs] How to update & test crossbow jobs Open

Component: Documentation Type: task

apache/arrow#31750 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026

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