Read 2026-10-04
reactivex/rxjava: technical due diligence, read from its repository
What Borehole read in reactivex/rxjava's code and history at 3d1247a: its licence, security advisories, releases, review practice, tests, dependencies and operations. Every finding cites the file and line it rests on. The full report also covers the team and asks the questions the code cannot answer.
| Dimension | Rating |
|---|---|
| Architecture & Codebase — including AI provenance | strong |
| Engineering Process & SDLC Maturity | adequate |
| Product & Engineering Maturity | not assessable |
| Security & Reliability Posture | strong |
| Observability & Operations | not assessable |
| Fit with the Acquirer | not assessable |
What the repository says
.github/PULL_REQUEST_TEMPLATE.md:7: states a policy on AI-generated contributionsREADME.md:9: names OpenSSF
Architecture & Codebase — including AI provenance
strongsrc/main/java/io/reactivex/rxjava4/core/Observable.java is 14,845 lines, 131× this codebase's median file
adequateThe median source file here is 113 lines. 10 files exceed 1,130 lines, the largest being 14,845. Size is not a defect on its own — some problems genuinely live in one place — but these are where merge conflicts, review fatigue and single-owner knowledge concentrate, and they are the first thing that slows an inheriting engineer down.
src/main/java/io/reactivex/rxjava4/core/Observable.java:1 — 14,845 lines (131× median) |
src/main/java/io/reactivex/rxjava4/core/Maybe.java:1 — 5,698 lines (50× median) |
src/main/java/io/reactivex/rxjava4/core/Single.java:1 — 5,227 lines (46× median) |
src/main/java/io/reactivex/rxjava4/core/Completable.java:1 — 3,388 lines (29× median) |
src/main/java/io/reactivex/rxjava4/parallel/ParallelFlowable.java:1 — 1,701 lines (15× median) |
Engineering Process & SDLC Maturity
adequateTests are retried until they pass
adequate5 tests are individually marked to retry. A retry turns a flaky test green without saying why it failed, so a green build means the tests passed eventually. Ask how many retries a typical run needs, and which tests need them.
11% of recent commits change more than 2,000 lines
adequate22 of 203 commits in the last 24 months changed over 2,000 lines of code, not counting reformatting, renames, vendored or generated code. A change that size is rarely reviewed line by line. Ask how they were reviewed, and what made them that large.
| 22 commits over 2,000 lines |
Product & Engineering Maturity
not assessableNot rated: only 9 of 19 checks could reach a conclusion here; the rest do not apply to this repository or could not read it.
Security & Reliability Posture
strong2 advisories against this project in the last 24 months, 2 high or critical
adequateThe newest was published on 2026-08-05. A project that publishes advisories is telling its users about its fixes, and the count and pace say how much security work it carries. None of them affects the surveyed version.
| 2026-08-05: GHSA-7mfh-h2cw-3p6c (high): RxJava TruffleHog Verified Secrets Exposed in Public CI Logs |
| 2026-08-05: GHSA-v6wc-p8jm-8pmx (high): RxJava Pwn Request Untrusted Code Execution via pull request target |
Observability & Operations
not assessableNot rated: only 5 of 16 checks could reach a conclusion here; the rest do not apply to this repository or could not read it.
Fit with the Acquirer
not assessableNot rated: structurally not assessable from a repository.
Read more, or read your own
The full report on reactivex/rxjava: every dimension, the questions for the room, and the audit log.
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