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Bug
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Resolution: Done
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Normal
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CSB-4.10.3
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False
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False
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Very Likely
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0
Even when an Exception which is not listed on the "recordException" option is thrown, the circuit break also counts it as failure.
Modified camel-spring-boot-examples/resilience4j/client/src/main/java/sample/camel/ClientRoute.java
@Override
public void configure() {
from("timer:trigger?period=1000").streamCaching()
.bean("counterBean")
.log(" Client request: ${body}")
.circuitBreaker()
.resilience4jConfiguration()
.recordException(new NullPointerException()).end()
.to("{{service1.url}}")
.log("Client throw a fake NoSuchMethodException to trigger circuit breaker")
.throwException(new NoSuchMethodException("Fake exception to trigger circuit breaker"))
.onFallback()
.to("{{service2.url}}")
.end()
[Log]
2025-06-23T09:35:14.922+09:00 INFO 3780 --- [ main] sample.camel.ClientApplication : Started ClientApplication in 0.547 seconds (process running for 0.641) 2025-06-23T09:35:15.936+09:00 INFO 3780 --- [timer://trigger] route1 : Client request: 1 2025-06-23T09:35:16.004+09:00 INFO 3780 --- [timer://trigger] route1 : Client throw a fake NoSuchMethodException 2025-06-23T09:35:16.032+09:00 INFO 3780 --- [timer://trigger] route1 : Client response: Service2-1 2025-06-23T09:35:16.923+09:00 INFO 3780 --- [timer://trigger] route1 : Client request: 2 2025-06-23T09:35:16.928+09:00 INFO 3780 --- [timer://trigger] route1 : Client throw a fake NoSuchMethodException 2025-06-23T09:35:16.931+09:00 INFO 3780 --- [timer://trigger] route1 : Client response: Service2-2 2025-06-23T09:35:17.925+09:00 INFO 3780 --- [timer://trigger] route1 : Client request: 3 2025-06-23T09:35:17.935+09:00 INFO 3780 --- [timer://trigger] route1 : Client throw a fake NoSuchMethodException 2025-06-23T09:35:17.939+09:00 INFO 3780 --- [timer://trigger] route1 : Client response: Service2-3 2025-06-23T09:35:18.926+09:00 INFO 3780 --- [timer://trigger] route1 : Client request: 4 2025-06-23T09:35:18.933+09:00 INFO 3780 --- [timer://trigger] route1 : Client throw a fake NoSuchMethodException 2025-06-23T09:35:18.937+09:00 INFO 3780 --- [timer://trigger] route1 : Client response: Service2-4 2025-06-23T09:35:19.931+09:00 INFO 3780 --- [timer://trigger] route1 : Client request: 5 2025-06-23T09:35:19.939+09:00 INFO 3780 --- [timer://trigger] route1 : Client throw a fake NoSuchMethodException 2025-06-23T09:35:19.948+09:00 INFO 3780 --- [timer://trigger] route1 : Client response: Service2-5 2025-06-23T09:35:20.936+09:00 INFO 3780 --- [timer://trigger] route1 : Client request: 6 2025-06-23T09:35:20.944+09:00 INFO 3780 --- [timer://trigger] route1 : Client response: Service2-6
The Resilience4j's community document describes it's behavior as follows:
https://resilience4j.readme.io/docs/circuitbreaker
Failure rate and slow call rate thresholds The state of the CircuitBreaker changes from CLOSED to OPEN when the failure rate is equal or greater than a configurable threshold. For example when more than 50% of the recorded calls have failed. By default all exceptions count as a failure. You can define a list of exceptions which should count as a failure. All other exceptions are then counted as a success, unless they are ignored. Exceptions can also be ignored so that they neither count as a failure or success.
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