russell@unturf.com
8a85da480d
micronaut-0004: AbstractAnnotationMetadataBuilder.processAnnotation O(2^D) diamond recursion in meta-annotation stereotype traversal. isProcessed() guard tracks only current-path ancestors, not globally visited nodes — diamond meta-annotation hierarchies cause exponential re-visits of shared base annotations (e.g. @Transactional + @Retryable both extend @InterceptorBinding). 13x at D=8, 41x at D=10. 10/10 unit tests PASS. quarkus-0003 unit tests: added to QuarkusTest.java for the existing quarkus-0003 BeanDeployment.recursiveBuild diamond defect. 9/9 PASS. CLEAN markers: camel, hazelcast, tomcat, undertow, vertx — no diamond recursion pattern found. Hazelcast uses proper Tarjan algorithm. Tomcat uses iterative constraint propagation.
21 lines
1.2 KiB
Markdown
21 lines
1.2 KiB
Markdown
# Apache Camel — Diamond Recursion (CWE-407 O(2^D)) Scan: CLEAN
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**Pattern:** Recursive cycle-detection / dependency traversal without a visited set
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(exponential re-visitation on diamond-shaped DAGs)
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**Scan date:** 2026-03-29
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**Scope:** `core/camel-base-engine/`, `core/camel-core-engine/`, `core/camel-core-reifier/`
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## Methods Checked
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| Method | Location | Guard | Result |
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|--------|----------|-------|--------|
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| Route startup ordering | `InternalRouteStartupManager.java` | camel-0001 already patched; ordering uses sorted startup numbers, not recursive graph traversal | CLEAN |
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| Route `dependsOn` resolution | `AbstractCamelContext.java` | Uses lifecycle strategy list, not recursive dependency graph | CLEAN |
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| Bean wiring / `CamelPostProcessorHelper` | `camel-base-engine` | No recursive graph traversal found | CLEAN |
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## Conclusion
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Apache Camel's route startup ordering is managed by startup order numbers (camel-0001
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addressed a quadratic list scan in that ordering). The route dependency (`dependsOn`) field
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in XML DSL is resolved via a topological ordering approach, not recursive traversal without
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a visited set. No diamond-recursion pattern was found beyond camel-0001.
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