Re: [I] Release arrow-rs / parquet patch version 54.2.1 (Feb 2025) (HOTFIX) [arrow-rs]

["alamb (via GitHub)" <gi...@apache.org>]

alamb commented on issue #7209:
URL: https://github.com/apache/arrow-rs/issues/7209#issuecomment-2692421114

   Here is my summary of what happened here for anyone who is curious:
   1. an arrow-rs dependency ('chrono', a Rust date/time library) released a version [`0.4.40`](https://crates.io/crates/chrono/0.4.40) which added a new function [`quarter`](https://docs.rs/chrono/0.4.40/chrono/trait.Datelike.html#method.quarter), to an existing type. Such an addition is normally "non breaking"
   2. However, in this case arrow-rs already provided a [`quarter`](https://docs.rs/arrow/latest/arrow/compute/fn.quarter.html) function with the same name (using a so-called Rust extension Trait). 
   3. Thus, when downstream projects upgraded to the (supposedly) compatible new version of chrono, there was now a name conflict causing a compiler error
   
   The fix for downstream users would be to not upgrade chrono (or "pin it to a specific version") which requires changes to their build systems
   
   Some downstream projects automatically pick up new compatible versions of crates, and thus simply doing `cargo update` would then not compile. 
   
   
   Our hotfix, included one change from  @Xuanwo  and @tustvold  in https://github.com/apache/arrow-rs/pull/7210. This change updates the Cargo.toml metadata file for arrow-rs (no actual Rust code changes) to explicitly say arrow-rs is not compatible with the new version of chrono, and thus preventing all downstream projects from having to individually do so.


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