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Graph/framework-contract-drift

AntiPattern

Migration Breaks Framework Contracts

framework-contract-drift

Servlet/MVC and build-time dependency contracts drift during framework migration, so security routing, servlet selection, and read/write servlet defaults silently diverge from intent, breaking endpoints or locking writes until versions, servlet mappings, and config semantics align.

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Updated6/26/2026

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30 linked nodes

MATCHESSolution

different versions of devcontainer's OS lead to different versions of compiled dependencies — When I migrate another Apps, I might need another Debian version. Tension: this would lead to the packages land in the sam. Outcome: I figured out later.

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I couldn't find any clear solution — from this template. Tension: the issue persists. Outcome: I am deploying backend and frontend separately.

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Upgrade Angular to a version where the CommonEngine bug is fixed, and switch SSR rendering to use AngularNodeAppEngine with server-side routing enabled (instead of CommonEngine). Configure the server routing/app engine accordingly so parameterized routes resolve on direct requests.

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Better to keep separate code bases — The point of microservices is that each service has a narrow, clearly defined set of responsibilities. Tension: it complicates deployment and testing. Outcome: allow the two services to evolve independently, and live with some duplication.

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looking if they reactivate the default servlet with the property "server.servlet.register-default-servlet=true" — in spring boot. Tension: there are no web.xml files in the resulting jar.

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Use a real sandboxing mechanism (e.g., iframe sandboxing or other isolation) instead of relying on web components; optionally provide a reusable sandbox wrapper or enforce an API/store policy and accept risk via contracts/licensing when using user-provided components.

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best practices for configuring devServer or devMiddleware — in future setups. Tension: prevent such vulnerabilities. Outcome: without upgrading the entire Vue CLI or webpack stack.

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fixed version for the vulnerability starts from 5.3.4. Tension: updating to a secure version seems non-trivial. Outcome: cannot update webpack-dev-middleware to a non-vulnerable version.

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For each MvcRequestMatcher, call MvcRequestMatcher#setServletPath to indicate the servlet path. Tension: This method cannot decide whether these patterns are Spring MVC patterns or not. Outcome: For each MvcRequestMatcher, call MvcRequestMatcher#setServletPath to indicate the servlet path.

MATCHESSolution

Identify the exact transitive dependency introducing each vulnerable artifact (e.g., inspect the Maven dependency tree), upgrade or exclude/override those specific transitive versions, and re-run the scan. Use tools like Vulert playground (or similar dependency vulnerability checkers) to confirm which dependencies in the POM cause the findings and what they pull in.

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Stage 2 (startup). Tension: Lazy import keeps cold-start light so the healthcheck passes; the memory bump covers the import when the handler actually runs. Outcome: functions-framework can bind the port.

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Spring Boot 4 introduced some major changes where, by default, it uses Jackson 3 instead of Jackson 2. Outcome: making it a more suitable candidate over the no-arg counterpart.

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Spring Boot 4. Tension: Spring Boot 4 modularizes the codebase so various things are moved to different modules/dependencies.

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If you see 2 versions of JPA — Spring Boot 3.3.x pulling in Spring Data JPA 3.3.x but another library in your project bringing an older Spring Data JPA. Tension: then remove the older version. Outcome: remove the older version.

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ctx.setParentLoaderPriority(false);. Tension: now my webapp classpath has priority over Jetty, and I can use logback. Outcome: and now my webapp classpath has priority over Jetty, and I can use logback.

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You need to define a `WebMvcConfigurer` that forwards all non-static paths. Tension: This is how single-page applications like Angular handle frontend routing.

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Add slf4j-bom 2.0.9 and log4j-slf4j2-impl 2.21.1 as a bridge for future SLF4J users

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Align all Spring Boot/Spring Security/Authorization Server dependency versions (e.g., upgrade the Spring Boot plugin to the same version and remove hardcoded version overrides), and prefer using org.springframework.boot:spring-boot-starter-oauth2-authorization-server so transitive dependencies match.

MATCHESSolution

I primarily use view models in the web layer. — To decouple the database layer from the web layer in Spring Boot. Tension: This separation ensures that the web layer does not directly expose or depend on the structure of the underlying database entities. Outcome: three view models should suffice.

MATCHESSolution

After remove this row it run perfectly — previously I did specify spring framework as 6.1.14. Tension: conflict between dependency that include in 3.4.x. Outcome: it run perfectly.

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Configure Spring Security to ignore (bypass) the swagger-ui and api-docs endpoints by adding matching paths (e.g., /swagger-ui/** and /v3/api-docs/**, plus /swagger-ui.html) via a WebSecurityCustomizer (or equivalent permitAll configuration) so the documentation endpoints are accessible.

MATCHESSolution

Rollback the Language Support for Java(TM) plugin to version 1.35.1

MATCHESSolution

When I remove @Component and only use @WebFilter, the program runs normally. Tension: Failed to register 'filter xssFilter' on the servlet context. Possibly already registered? Outcome: the program runs normally.

MATCHESSolution

calls requesting the Provider afterwards do not work (the user returns null — after a Spring 5 -> 6 (Spring Boot 3.3.4) migration. Tension: I can sign in to my site, but calls requesting the Provider afterwards do not work. Outcome: I fixed this today, and found the following out that helped resolve this in my custom filter code.

MATCHESSolution

Only javax usage inside Jakarta EE is affected by modification restrictions. — Apache Commons IO uses javax.imageio. Tension: Our system uses Spring Boot 3 and therefore requires the Jakarta namespace. Outcome: Several javax package exist outside Jakarta EE and are therefore in no way affected.

MATCHESSolution

Don't build per-client adapters. — client capabilities change with updates. Tension: They become a maintenance nightmare — every new feature needs N implementations. Outcome: one delivery function that degrades.

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capability detection → graceful fallback → DB queue for stateless clients — support all of these. Tension: There's no single mechanism that works everywhere. Outcome: capability negotiation is the only viable pattern.

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future hand-authored migrations. Outcome: A CI guard that diffs `packages/db/src/migrations/*.sql` filenames against `meta/_journal.json` tags would catch this class of bug at PR time.

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Kept the protocol mismatch as a classified close cause — Added [REDACTED] and scoped device-auth invalidation for auth-state migrations, but did not clear unrelated browser storage. Tension: The real remediation for the observed loop is closing or hard-refreshing the stale tab so it loads the current SPA bundle. Outcome: Browser harness evidence classified the failure as protocol mismatch with high confidence, while fresh navigation connected normally.

MATCHESSolution

Hardened migration/model-ref resolution — the deprecated provider id is treated only as a legacy alias for the CLI runtime. Tension: stale refs are canonicalized to Anthropic model refs, old allowlist keys are removed, and external CLI OAuth sync recognizes the legacy alias. Outcome: external CLI OAuth sync recognizes the legacy alias.

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