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https://issues.apache.org/jira/browse/CAMEL-24380?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Claus Ibsen resolved CAMEL-24380.
---------------------------------
Resolution: Fixed
> camel-spring-boot - Regression in platform-http/platform-http-starter timeout
> handling
> --------------------------------------------------------------------------------------
>
> Key: CAMEL-24380
> URL: https://issues.apache.org/jira/browse/CAMEL-24380
> Project: Camel
> Issue Type: Bug
> Components: camel-spring-boot
> Affects Versions: 4.18.3
> Reporter: Alexander Zobkov
> Assignee: Claus Ibsen
> Priority: Major
> Fix For: 4.18.5
>
>
> After upgrading camel and camel-spring-boot from 4.17.0 to 4.18.3, we
> observed a regression in how request timeouts are handled on
> camel-platform-http routes.
> Route:
> from(EndpointBuilder.instance.platformHttp('/path/a/b/c')
> .httpMethodRestrict('GET'))
> ...
> .to(call-to-legacy-system)
> ...
> The downstream legacy-system is occasionally slow, and its response time can
> exceed the value configured in camel.component.platform-http.request-timeout.
> Behavior in 4.17.0:
> When the timeout is reached, Spring Boot's default error handling produces a
> well-formed JSON response:
> {"timestamp":"2026-08-05T20:12:09.500+00:00","status":503,"error":"Service
> Unavailable","path":"/path/a/b/c"}
> Behavior in 4.18.3:
> The same scenario now returns the Whitelabel Error Page as HTML, with a null
> status and type:
> <html><body><h1>Whitelabel Error Page</h1><p>This application has no explicit
> mapping for /error, so you are seeing this as a fallback.</p><div
> id='created'>null</div><div>There was an unexpected error (type=null,
> status=null).</div></body></html>
> Suspected root cause:
> I bisected the change to [commit
> d8e1581|https://github.com/apache/camel-spring-boot/commit/d8e158113a5dfe66bce11d8a618950120c8bb895]
> ("chore: use WebAsyncTask, fix @LocalServerPort, revert generated file"),
> which changed SpringBootPlatformHttpConsumer#service() from returning a plain
> Callable<Void> to a WebAsyncTask<Void> with a custom onTimeout handler:
> java
> task.onTimeout(() -> {
> if (!response.isCommitted()) {
> response.sendError(HttpServletResponse.SC_SERVICE_UNAVAILABLE);
> }
> return null;
> });
> In 4.17.0, an unhandled timeout produced an AsyncRequestTimeoutException,
> which Spring MVC's ResponseStatusExceptionResolver translates into a 503
> dispatch to /error, correctly populating the jakarta.servlet.error.* request
> attributes that BasicErrorController/DefaultErrorAttributes rely on to render
> the JSON body.
> In 4.18.3, response.sendError(503) is now called directly inside the
> onTimeout callback, and the callback returns null as the async result. No
> exception is ever raised through Spring's exception-resolution chain, so when
> the container performs the subsequent error dispatch to /error, the expected
> request attributes are missing — resulting in the generic Whitelabel page
> with status=null, type=null instead of Boot's normal structured error
> response.
> Expected behavior:
> A platform-http timeout should still result in Spring Boot's standard /error
> handling (JSON body with correct status/error/path), consistent with the
> pre-4.18.3 behavior.
> Suggested fix direction:
> Rather than calling response.sendError() directly in onTimeout, either let an
> AsyncRequestTimeoutException (or equivalent) propagate so Spring's normal
> exception-resolution/error-dispatch machinery populates the error attributes,
> or explicitly set the jakarta.servlet.error.* request attributes before
> triggering the error dispatch.
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