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https://issues.apache.org/jira/browse/CAMEL-15928?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17246636#comment-17246636
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Claus Ibsen commented on CAMEL-15928:
-------------------------------------
I would actually not think this is how circuit breakers work. The timeout is on
the normal task, the fallback runs indepently and is not under timeout or the
likes. The goal of the fallback is to do some simpler task that you can use
instead, such as returning a fixed response, or last known good response (from
a cache) or something.
> TimeoutException does not trigger Resilience4j circuit breaker
> --------------------------------------------------------------
>
> Key: CAMEL-15928
> URL: https://issues.apache.org/jira/browse/CAMEL-15928
> Project: Camel
> Issue Type: Improvement
> Components: came-core, eip
> Affects Versions: 3.4.4
> Reporter: Alex Liroyd
> Priority: Major
> Fix For: 3.8.0
>
> Attachments: hot_fix.diff
>
>
> Currently Timeout exceptions does not trigger circuit breaker. But they
> should. I don't want to continue spam my server, if it slightly started dying.
> I tried to hot-fix in the next way - [^hot_fix.diff]
> The idea behind patch is next. Currently we wrap our call with circuit
> breaker and only after that with time limiter. So, circuit breaker doesn't
> know anything about time-outs.
> And basically I do opposite - initially wrap call with time limiter and only
> after that, wrap it with circuit breaker. So circuit breaker will aware about
> time-out exception and can react properly.
> The issue which I have afterward, that, for cases when circuit breaker was
> open, I started receiving blank 200 OK response.
> I tried to fix it by removing recover(fallbackTask) part at all:
>
> {code:java}
> // Try.ofCallable(task).recover(fallbackTask).andFinally(() ->
> callback.done(false)).get(); //old code
> Try.ofCallable(task).andFinally(() -> callback.done(false)).get(); // new
> line of code
> {code}
> And seems like it works fine. But tests are failing, and I'm not sure how
> exactly it should be fixed.
> Also another fix, which seems like works fine and tests are not failing:
> CircuitBreakerFallbackTask
>
> {code:java}
> } else if (throwable instanceof CallNotPermittedException) {
> // the circuit breaker triggered a call rejected
>
> exchange.setProperty(CircuitBreakerConstants.RESPONSE_SUCCESSFUL_EXECUTION,
> false);
> exchange.setProperty(CircuitBreakerConstants.RESPONSE_FROM_FALLBACK,
> false);
> exchange.setProperty(CircuitBreakerConstants.RESPONSE_SHORT_CIRCUITED,
> true);
> exchange.setProperty(CircuitBreakerConstants.RESPONSE_REJECTED, true);
> throw RuntimeExchangeException.wrapRuntimeException(throwable); // new
> line of code
> //return exchange; // old code
> {code}
>
>
> Please, assist.
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