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https://issues.apache.org/jira/browse/CAMEL-15928?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17253954#comment-17253954
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Claus Ibsen commented on CAMEL-15928:
-------------------------------------
Thanks for the detailed analysis and the PRs to fix this on our branches.
> TimeoutException does not trigger Resilience4j circuit breaker
> --------------------------------------------------------------
>
> Key: CAMEL-15928
> URL: https://issues.apache.org/jira/browse/CAMEL-15928
> Project: Camel
> Issue Type: Bug
> Components: came-core, eip
> Affects Versions: 3.4.4
> Reporter: Alex Liroyd
> Priority: Major
> Fix For: 3.7.1, 3.8.0, 3.4.6
>
> Attachments: camel_fix_for_fallback.diff,
> failed_tests_with_time_out.patch, hot_fix.diff,
> image-2020-12-21-13-10-40-893.png, test_errors_stackTrace.txt
>
>
> 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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