Apache Arrow Dev List Digest (Sept 15–19, 2025)

A lively week for Arrow: multiple release votes (and an announcement), Rust-side activity, and some useful operational threads. Here’s a concise roundup with links to the original discussions.

Releases & Votes

.NET: 22.0.1 RC → Release

RC0 vote opened (Sept 15): [VOTE][.NET] 22.0.1 RC0
Vote result posted (Sept 19): [RESULT][VOTE][.NET] 22.0.1 RC0
Release announced (Sept 19): [ANNOUNCE] Apache Arrow .NET 22.0.1

Why it matters: Quick RC→GA turnaround shows a healthy stabilization loop on the .NET side and keeps parity with recent core changes.

ADBC: Post-vote housekeeping

Result & follow-ups (Sept 17–18):

Why it matters: ADBC keeps the multi-language driver story moving forward with a steady cadence of fixes and features.

Rust: New RCs

Arrow Rust 56.2.0 RC1 (Sept 19): [VOTE][RUST] 56.2.0 RC1
Object Store 0.12.4 RC1 (Sept 19): [VOTE][RUST] object_store 0.12.4 RC1

Why it matters: Regular Rust releases help downstreams (DataFusion, Ballista, etc.) pick up improvements quickly.

Dev & Infra Threads

Build help: Arrow 22.0 with C++/Python

Troubleshooting thread (Sept 16): “Where to log an issue building Arrow 22.0 w/ C++ Python bindings”

Takeaway: Maintainers pointed to the right channels and artifacts; a good example of community support for build environment snags.

Access: JIRA permissions request

Request (Sept 16): JIRA issue-create permission for Arrow

Takeaway: Routine governance thread; keeps contributor on-ramp smooth.

Repository hygiene

Monorepo maintenance follow-up (Sept 19): “PR for monorepo stale-issue cleanup is ready; merging soon unless objections”

Takeaway: Ongoing cleanup reduces noise for contributors and helps triage focus.

What’s the signal this week?

Healthy cadence: .NET and ADBC show disciplined release processes; Rust continues rapid iteration.
Low friction for contributors: Quick responses on build/JIRA threads and monorepo hygiene help new and existing contributors stay productive.
Ecosystem breadth: Multiple language fronts advancing in parallel underscores Arrow’s “many clients, one format” philosophy.