Claus Ibsen created CAMEL-26785:
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Summary: camel-management - the steps of a circuit breaker's
onFallback have no processor MBean, so they are missing from the route's
processors and their statistics
Key: CAMEL-26785
URL: https://issues.apache.org/jira/browse/CAMEL-26785
Project: Camel
Issue Type: Bug
Components: camel-management
Reporter: Claus Ibsen
Fix For: 4.24.0
The steps inside the {{onFallback}} of a circuit breaker get no processor
MBean. They are missing wherever the processors of a route are listed: JMX, the
route dev console with {{processors=true}}, {{camel get processor}}, and the
Routes tab of the Camel TUI. The fallback steps are exactly the ones that run
during an outage.
Example (the {{fail-well/circuit-breaker}} example): route {{stock-check}} has
{{circuitBreaker1}} with {{to1}} in its steps and a {{choice1}} with
{{setBody1}} and {{setBody2}} in its {{onFallback}}. The route console lists
only:
{noformat}
stock-check ['circuitBreaker1', 'to1', 'log1']
{noformat}
The fallback steps are created (the startup recorder shows {{choice1 Create
processor}}, {{setBody1 Create processor}}), and errors in them are reported
under {{stock-check}} since CAMEL-26750.
Cause: {{JmxManagementLifecycleStrategy.registerPerformanceCounters}} walks a
definition's {{getOutputs()}} (and, since CAMEL-24988, the destinations of a
{{SwitchDefinition}}). The fallback of a {{CircuitBreakerDefinition}} is not
one of its outputs, so no performance counter is registered for its steps, and
no processor MBean is made for them.
Suggested fix: also walk {{CircuitBreakerDefinition.getOnFallback()}} there,
with a test in camel-management that the fallback steps are among the
processors of the route (Resilience4j and MicroProfile Fault Tolerance share
the model). Other EIPs that keep steps outside {{getOutputs()}} may have the
same gap.
Found while walking the Camel TUI; the cause is from reading the code, not yet
confirmed by a test.
_Claude Code on behalf of davsclaus_
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