MINOR: Reject non zero offset on array import - #1263
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robert3005
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August 19, 2026 13:35
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jbonofre
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Thanks for the suggestion, I applied it and added test to make sure we don't regress it in the future |
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@robert3005 thanks! I'm doing a new pass 😄 |
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By the way, we merged a fix on CI, I will rebase. |
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The `JNI macos-15-intel x86_64` job currently fails on `main` and on every open PR while installing dependencies: ``` ==> Installing node Error: node: no bottle available! This is a Tier 3 configuration: https://docs.brew.sh/Support-Tiers#tier-3 Installing node has failed! `brew bundle` failed! 1 Brewfile dependency failed to install ``` `apache/arrow`'s `cpp/Brewfile` lists `brew "node"`, and Homebrew treats x86_64 macOS as a tier 3 configuration and no longer builds a bottle for it. `brew bundle` doesn't build from source, so the step aborts before anything is built. We don't need Node.js for the JNI build, so this skips installing it via `HOMEBREW_BUNDLE_BREW_SKIP`, the same way #1269 did for `aws-sdk-cpp` and gRPC. Failing runs for reference: * `main`: https://github.com/apache/arrow-java/actions/runs/33283736388/job/99183221397 * PR #1263: https://github.com/apache/arrow-java/actions/runs/33297775855/job/99221106761
Signed-off-by: Robert Kruszewski <github@robertk.io>
Signed-off-by: Robert Kruszewski <github@robertk.io>
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Null arrays export no buffers (n_buffers == 0), so the offset has nothing to apply to and never enters the import: doImport short-circuits to an empty buffer list and NullVector.loadFieldBuffers only reads the field node length. Arrow C++ still propagates a slice offset onto the struct for these arrays, so rejecting them regressed imports that previously succeeded, e.g. a sliced all-null column.
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@robert3005 I updated the I will merge as soon as CI is green. |
jbonofre
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What's Changed
Instead of silently accepting the array and pretending the import went fine reject arrays where offset is non 0. Add mention to the docs that this is not supported
This is documentation and negative case for #251