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https://issues.apache.org/jira/browse/CAMEL-26320?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Claus Ibsen resolved CAMEL-26320.
---------------------------------
Resolution: Fixed
> camel-main - a properties file that changed in dev mode applies its
> camel.resilience4j and camel.faulttolerance keys
> --------------------------------------------------------------------------------------------------------------------
>
> Key: CAMEL-26320
> URL: https://issues.apache.org/jira/browse/CAMEL-26320
> Project: Camel
> Issue Type: Improvement
> Components: camel-main
> Reporter: Claus Ibsen
> Assignee: Claus Ibsen
> Priority: Major
> Fix For: 4.24.0
>
>
> With live reloading (camel run --dev), a change to application.properties
> applies its camel.component.*, camel.dataformat.*, camel.language.* and new
> camel.beans.* keys (CAMEL-25767), but not the defaults of the circuit
> breakers: camel.resilience4j.* and camel.faulttolerance.* were read only when
> the application started. Settings such as slidingWindowSize,
> minimumNumberOfCalls, failureRateThreshold and waitDurationInOpenState are
> hard to get right without trying them, and a restart for each try slows this
> down.
> A properties reload already creates the routes again after it applies the
> configuration, and a circuit breaker reads the defaults when its route is
> created (it also removes its breaker from the registry when it stops). So the
> reload now binds the camel.resilience4j.* and camel.faulttolerance.* keys
> that are new or changed onto the default configurations of the model, as at
> startup, and the circuit breakers of the re-created routes use them.
> Checked with camel run --dev: a circuit breaker that always fails, started
> with minimumNumberOfCalls=1000, stays CLOSED. After application.properties is
> saved with minimumNumberOfCalls=2, it opens without a restart. Before this
> change it stayed CLOSED.
> A key that is removed from the file keeps its value until a restart, as a
> reload passes the keys that are new or changed.
> This came up in the local-model benchmark of Oct 25-26 2026, where models
> wrote these keys to application.properties to configure a circuit breaker
> (CAMEL-26316).
> _Filed by Claude Code on behalf of davsclaus_
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