The content below is an LLM summary of this month’s activity on the mailing list.

• Allocator Strategy for C++: Discussions continue on removing jemalloc support due to halted development. While mimalloc is default, concerns about its single maintainer and reported issues foster caution regarding full deprecation. [DISCUSS][C++] Removing jemalloc support](https://lists.apache.org/list?dev@arrow.apache.org:lte=2M:DISCUSS%20C++%20Removing%20jemalloc%20support) Re: [DISCUSS][C++] Removing jemalloc support
• Arrow Format Definition Management: A proposal for a dedicated arrow-format repository to centralize IPC/Flight FlatBuffer/Protobuf definitions was debated. Concerns over increased developer friction versus simplified updates currently maintain per-language copies. [DISCUSS] Creating an arrow-format repository](https://lists.apache.org/list?dev@arrow.apache.org:lte=2M:DISCUSS%20Creating%20an%20arrow-format%20repository)
• New Language Implementations: The community is evaluating a proposal for an Erlang Apache Arrow implementation, involving Apache IP clearance and establishing development guidelines. [DISCUSS][Erlang] Erlang Apache Arrow Implementation](https://lists.apache.org/list?dev@arrow.apache.org:lte=2M:DISCUSS%20Erlang%20Erlang%20Apache%20Arrow%20Implementation) Re: [DISCUSS][Erlang] Erlang Apache Arrow Implementation

• Canonical Extension Types: A vote passed to add a canonical extension type for Parquet’s ‘Variant’ type to the Arrow format, standardizing external type representations and enhancing interoperability. [VOTE][Format] Add Canonical Variant Extension type](https://lists.apache.org/list?dev@arrow.apache.org:lte=2M:VOTE%20Format%20Add%20Canonical%20Variant%20Extension%20type)
• Growing ADBC Maturity: Apache Arrow Database Connectivity (ADBC) libraries released version 20, resolving 44 issues across multiple language bindings. This signifies increasing stability and feature completeness for Arrow’s cross-language database access layer. [VOTE] Release Apache Arrow ADBC 20 - RC0](https://lists.apache.org/list?dev@arrow.apache.org:lte=2M:VOTE%20Release%20Apache%20Arrow%20ADBC%2020%20-%20RC0) [ANNOUNCE] Apache Arrow ADBC 20 Released](https://lists.apache.org/list?dev@arrow.apache.org:lte=2M:ANNOUNCE%20Apache%20Arrow%20ADBC%2020%20Released)
• Developer Onboarding & Support: New contributor inquiries highlight a need for clearer, updated documentation on developer workflow, especially regarding the Jira to GitHub issue tracking migration. I am interested to contribute for arrow go please let me know where to log an issue in my attempt to build Arrow 22.0 w/ C++ Python bindings Request for Jira Issue create permission for Apache Arrow

• Large Data Handling Bug: A critical C++ BitWriter/BitReader bug, causing integer overflow when storing 300 million doubles, highlights the need for robust testing with extreme data volumes. huge data issue in RLE stream
• Cross-Language/Platform Testing Robustness: Release verifications exposed issues like a Go 1.25 leak sanitizer problem, C# ADBC verification hiccups, and a Python.NET bug impacting .NET testing. These show challenges in maintaining stable CI/CD across Arrow’s diverse ecosystem. [VOTE][Go] Release Apache Arrow Go v18.4.1 RC0](https://lists.apache.org/list?dev@arrow.apache.org:lte=2M:VOTE%20Go%20Release%20Apache%20Arrow%20Go%20v18.4.1%20RC0) [VOTE] Release Apache Arrow ADBC 20 - RC0](https://lists.apache.org/list?dev@arrow.apache.org:lte=2M:VOTE%20Release%20Apache%20Arrow%20ADBC%2020%20-%20RC0) [VOTE][.NET] Release Apache Arrow .NET 22.0.1 RC0](https://lists.apache.org/list?dev@arrow.apache.org:lte=2M:VOTE%20.NET%20Release%20Apache%20Arrow%20.NET%2022.0.1%20RC0)

• Community Engagement & Growth: Sustained focus on community building through bi-weekly meetings and the upcoming Arrow Summit 25, fostering collaboration and aligning project direction. Arrow community meeting August 27 at 16:00 UTC Arrow community meeting September 10 at 16:00 UTC [Arrow Summit 25] Tickets](https://lists.apache.org/list?dev@arrow.apache.org:lte=2M:Arrow%20Summit%2025%20Tickets) [ANNOUNCE] Arrow Summit 25 registration is open!](https://lists.apache.org/list?dev@arrow.apache.org:lte=2M:ANNOUNCE%20Arrow%20Summit%2025%20registration%20is%20open!)
• Format Evolution for Interoperability: The Canonical Variant Extension type vote highlights a strategic commitment to evolving the Arrow format, enhancing support for complex data types and integration with other ecosystems. [VOTE][Format] Add Canonical Variant Extension type](https://lists.apache.org/list?dev@arrow.apache.org:lte=2M:VOTE%20Format%20Add%20Canonical%20Variant%20Extension%20type)
• Cross-Language Ecosystem Expansion: Multiple release votes (Rust, Go, .NET), coupled with new language binding discussions (Erlang), demonstrate an ongoing strategic focus on expanding and maintaining a broad, high-quality multi-language ecosystem. [VOTE][RUST] Release Apache Arrow Rust 56.1.0 RC1](https://lists.apache.org/list?dev@arrow.apache.org:lte=2M:VOTE%20RUST%20Release%20Apache%20Arrow%20Rust%2056.1.0%20RC1) [VOTE][Go] Release Apache Arrow Go v18.4.1 RC0](https://lists.apache.org/list?dev@arrow.apache.org:lte=2M:VOTE%20Go%20Release%20Apache%20Arrow%20Go%20v18.4.1%20RC0) [VOTE][.NET] Release Apache Arrow .NET 22.0.0 RC0](https://lists.apache.org/list?dev@arrow.apache.org:lte=2M:VOTE%20.NET%20Release%20Apache%20Arrow%20.NET%2022.0.0%20RC0) [VOTE][.NET] Release Apache Arrow .NET 22.0.1 RC0](https://lists.apache.org/list?dev@arrow.apache.org:lte=2M:VOTE%20.NET%20Release%20Apache%20Arrow%20.NET%2022.0.1%20RC0) [DISCUSS][Erlang] Erlang Apache Arrow Implementation](https://lists.apache.org/list?dev@arrow.apache.org:lte=2M:DISCUSS%20Erlang%20Erlang%20Apache%20Arrow%20Implementation)