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 20h
Merged PRs (30d): 94

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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2154 open issues indexed

pq.read_table doesn't seem to be thread safe Open

Component: Parquet Type: bug

apache/arrow#33189 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Potential race condition in readahead generator Open

Component: C++ Type: bug

apache/arrow#33201 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[R] integer coercion on parition variables Open

Component: R Type: bug

apache/arrow#33210 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Java][Flight] Implement JPMS (module-info.java) for Flight module Open

Type: task

apache/arrow#33224 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Java][Flight] Define a method to modularize GRPC API/Context dependency Open

Type: task

apache/arrow#33225 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Java] Implement cross-compilation for JDK11 and be able to produce artifacts for JDK8 (--release 8) Open

Type: task

apache/arrow#33226 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Java] Drop JDK8 support Open

Type: task

apache/arrow#33227 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Python] SubstraitSinkConsumer should handle backpressure Open

Component: C++ Type: bug

apache/arrow#33228 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Acero/dataset relies on ExecBatch::ToRecordBatch truncating excess columns Open

Component: C++ Type: bug

apache/arrow#33240 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[R] Support column renaming in col_select argument to file reading functions Open

Component: R good-first-issue Type: task

apache/arrow#33251 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Writing a dataset with 0 rows doesn't create any files Open

Component: C++ Type: bug

apache/arrow#33261 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
How to expose missing C++ API to Cython? Open

apache/arrow#14421 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Error of wrong number of rows read from Parquet file Open

Component: Python Type: bug

apache/arrow#33265 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python][Doc] Documentation for Test Groups out of sync Open

Component: Python Type: bug

apache/arrow#33267 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] "CSV parser got out of sync with chunker" on subsequent batches regardless of block size Open

Component: C++ Component: Python Type: bug

apache/arrow#33282 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Dev][Archery][Crossbow] Comment report bot uses the wrong URL if task run has not started Open

Component: Archery Component: Continuous Integration Priority: Critical Type: bug

apache/arrow#33283 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Dev][CI] Make nightly group as an alias of nightly-* Open

Component: Continuous Integration Component: Developer Tools Type: enhancement

apache/arrow#33292 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 14, 2026
[C++] Add a "list_contains" kernel Open

Component: C++ Status: needs champion Type: enhancement

apache/arrow#33295 · 8 comments · 4 reactions · 1 assignee · Indexed Sep 14, 2026
[Python] Cannot create pandas categorical from table only with nulls Open

Component: Python Type: bug

apache/arrow#33297 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Intermittent failure in TestNewScanner.Backpressure Open

Component: C++ Type: bug

apache/arrow#33298 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Arrow Flight SegFault Open

Component: FlightRPC Type: bug

apache/arrow#33303 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[R] unify_schemas=FALSE does not improve open_dataset() read times Open

Component: R Type: bug

apache/arrow#33312 · 9 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[CI][Python] Have a way to reproduce hypothesis failures from CI Open

Component: Continuous Integration Component: Python Type: test

apache/arrow#33324 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] get_include() gives wrong directory in conda environment Open

Component: Python Priority: Critical Type: bug

apache/arrow#33326 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Update "options" handling for Substrait functions Open

Component: C++ Type: bug

apache/arrow#33329 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
The metadata info will lost in parquet file schema after writing the parquet file by calling the FileSystemDataset::Write() method. Open

Component: C++ Type: bug

apache/arrow#33335 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[R] Rename read_ipc_file to read_arrow_file & highlight arrow over feather Open

Component: Documentation Component: R good-first-issue Type: enhancement

apache/arrow#20472 · 11 comments · 1 reaction · 1 assignee · Indexed Sep 14, 2026
[Python/C++] High memory usage/potential leak when reading parquet using Dataset API Open

Component: Parquet Type: bug

apache/arrow#33350 · 9 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Scanner slicing large row groups leads to inefficient RAM usage Open

Component: C++ Type: enhancement

apache/arrow#20473 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Allow ConvertOptions.timestamp_parsers for date types Open

Component: Python Type: enhancement

apache/arrow#33357 · 5 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
If I can cimport the cython .pxd files from pyarrow directly Open

apache/arrow#14526 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Use saved pandas metadata to determine default timestamp_as_object in to_pandas() Open

Component: Python Type: enhancement

apache/arrow#33365 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[R] arrow::open_dataset %>% select(myvars) %>% collect causes memory leak Open

Priority: Critical Type: bug

apache/arrow#33366 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Error: AWS Error [code 99]: curlCode: 28, Timeout was reached Open

Component: Parquet Type: bug

apache/arrow#33371 · 0 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
[C++][Python] Substrait plan execution with invalid backpressure options causes erroneous exit. Open

Type: bug

apache/arrow#33375 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Valgrind failure in arrow-gcsfs-test Open

Component: C++ Priority: Critical Type: bug

apache/arrow#33379 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Acero should reject Substrait plans that require an implicit cast from decimal to float Open

Component: C++ Type: bug

apache/arrow#33381 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Multiple Filesystem subclasses are missing an override for Equals Open

Component: C++ Type: bug

apache/arrow#33403 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[R] read_csv_arrow fails when a string contains a backslash-escaped quote mark followed by a comma Open

Component: R good-second-issue Priority: Critical Type: bug

apache/arrow#33405 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] pyarrow.lib.ArrowInvalid: Not a Feather V1 or Arrow IPC file Open

Component: Python Type: bug

apache/arrow#33412 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Add cast option to return null for values that can't convert Open

Component: C++ Component: Python Component: R Type: bug

apache/arrow#20486 · 4 comments · 2 reactions · 0 assignees · Indexed Sep 14, 2026
[R] Error when trying to write POSIXlt data to CSV Open

Component: R Priority: Critical Type: bug

apache/arrow#33443 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[Python] Reading from hdfs using pyarrow 10.0.0 throws OSError: [Errno 22] Opening HDFS file Open

Component: Python Type: bug

apache/arrow#33455 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++][Python] Implement HashAggregate UDF Open

Component: C++ Component: Python Type: task

apache/arrow#33457 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[R] Troubles with using augmented columns Open

Component: C++ Component: R Priority: Critical Priority: Medium Type: bug

apache/arrow#33464 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Proxy memory pool crashes with Dataset scanning Open

Component: C++ Type: bug

apache/arrow#33470 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
arrow dataset: how to use date.year and date.month as partitioning Open

apache/arrow#14619 · 10 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
[R] Test quarter-year parser with trailing zeroes in the year when values are numeric Open

Component: R Type: enhancement

apache/arrow#33479 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[C++] Read list/array data from ChunkedArray with multiple chunks Open

Component: C++ Type: test

apache/arrow#33481 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
[R] Issues with open_dataset() Open

Component: R Type: bug

apache/arrow#33486 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026

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