Henrik created CAMEL-24351:
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Summary: camel-platform-http-starter: CamelRequestHandlerMapping
is @Lazy, so every platform-http endpoint can silently return 404
Key: CAMEL-24351
URL: https://issues.apache.org/jira/browse/CAMEL-24351
Project: Camel
Issue Type: Bug
Components: camel-platform-http
Affects Versions: 4.21.0
Reporter: Henrik
`@Lazy` on the mapping bean means it is created on first demand, which is
unordered against CamelContext startup. `CamelRequestHandlerMapping` registers
itself as a `PlatformHttpListener` from its constructor, and `addHttpEndpoint`
notifies only listeners existing at that moment — so if Camel starts first, the
mapping receives no callback for any endpoint and its registry stays empty.
Requests then get Spring's `BasicErrorController` 404, including the correct
path, which is what makes it confusing to diagnose.
The application looks healthy throughout: routes log `Started <route>
(rest://get:/...)`, pubsub/timer routes work, probes stay green. Two behaviours
make it fully silent — `addPlatformHttpListener` doesn't replay
`getHttpEndpoints()` to a new listener, and `addHttpEndpoint` swallows listener
exceptions at WARN. Nothing is logged for the failing requests because no route
runs.
**Regression evidence** (from the released jars' constant pools): 4.18.3 none →
eager; 4.20.0 `@DependsOn` → eager; 4.21.0 `@Lazy`. Introduced by
`264db4c12e0`, titled *"Fix compilation error in camel-aws-s3 (#1783)"*, which
replaced an `ObjectProvider<CamelContext>` with direct injection plus `@Lazy`.
**Reproduction** is environment-dependent, so I described it honestly rather
than as a recipe: roughly 1 in 3 pods came up working, fixed per pod for its
lifetime (10/30 identical requests succeeded, from 3 healthy pods of ~9). Apps
with a separate management port don't see it — the management child context
initialises its DispatcherServlet early and `beansOfTypeIncludingAncestors`
instantiates the parent's mapping before Camel starts. The deterministic check
is the bean definition's `isLazyInit()`.
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