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https://issues.apache.org/jira/browse/CAMEL-14324?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dietrich Schulten updated CAMEL-14324:
--------------------------------------
Description:
When {{useMDCLogging}} is set to true on a CamelContext with camel-zipkin, the
application fails to start. The error message is
{{java.lang.NoClassDefFoundError:
brave/internal/propagation/CorrelationFieldScopeDecorator}}.
The reason might be that the {{brave.context.slf4j.MDCScopeDecorator}} from
{{brave-context-slf4}}j, introduced into ZipkinTracer with CAMEL-12721, extends
{{brave.internal.propagation.CorrelationFieldScopeDecorator}}, which is not
exported by the brave bundle
[https://github.com/openzipkin/brave/tree/5.6.5/brave], according to its
[bnd.bnd|[https://github.com/openzipkin/brave/blob/5.6.5/brave/bnd.bnd]] file.
Possibly this is why the [instance
creation|https://github.com/apache/camel/blob/e46b2d916aa748dfd292190ed52b9d3413ceb70d/components/camel-zipkin/src/main/java/org/apache/camel/zipkin/ZipkinTracer.java#L576]
fails.
The solution could be to use only exported brave classes (effectively
recreating {{MDCScopeDecorator}}) or maybe let OSGi create the
{{MDCScopeDecorator }}instance.
was:
When `useMDCLogging` is set to true on a CamelContext with camel-zipkin, the
application fails to start. The error message is
`java.lang.NoClassDefFoundError:
brave/internal/propagation/CorrelationFieldScopeDecorator`.
The reason might be that the `brave.context.slf4j.MDCScopeDecorator` from
brave-context-slf4j, introduced into ZipkinTracer with CAMEL-12721, extends
`brave.internal.propagation.CorrelationFieldScopeDecorator`, which is not
exported by the brave bundle
[https://github.com/openzipkin/brave/tree/5.6.5/brave], according to its
[bnd.bnd|[https://github.com/openzipkin/brave/blob/5.6.5/brave/bnd.bnd]] file.
Possibly this is why the [instance
creation|https://github.com/apache/camel/blob/e46b2d916aa748dfd292190ed52b9d3413ceb70d/components/camel-zipkin/src/main/java/org/apache/camel/zipkin/ZipkinTracer.java#L576]
fails.
The solution could be to use only exported brave classes (effectively
recreating MDCScopeDecorator) or maybe let OSGi create the `MDCScopeDecorator`
instance.
> Brave MDC Integration does not work in Karaf
> --------------------------------------------
>
> Key: CAMEL-14324
> URL: https://issues.apache.org/jira/browse/CAMEL-14324
> Project: Camel
> Issue Type: Bug
> Components: camel-zipkin
> Reporter: Dietrich Schulten
> Priority: Major
>
> When {{useMDCLogging}} is set to true on a CamelContext with camel-zipkin,
> the application fails to start. The error message is
> {{java.lang.NoClassDefFoundError:
> brave/internal/propagation/CorrelationFieldScopeDecorator}}.
> The reason might be that the {{brave.context.slf4j.MDCScopeDecorator}} from
> {{brave-context-slf4}}j, introduced into ZipkinTracer with CAMEL-12721,
> extends {{brave.internal.propagation.CorrelationFieldScopeDecorator}}, which
> is not exported by the brave bundle
> [https://github.com/openzipkin/brave/tree/5.6.5/brave], according to its
> [bnd.bnd|[https://github.com/openzipkin/brave/blob/5.6.5/brave/bnd.bnd]]
> file. Possibly this is why the [instance
> creation|https://github.com/apache/camel/blob/e46b2d916aa748dfd292190ed52b9d3413ceb70d/components/camel-zipkin/src/main/java/org/apache/camel/zipkin/ZipkinTracer.java#L576]
> fails.
> The solution could be to use only exported brave classes (effectively
> recreating {{MDCScopeDecorator}}) or maybe let OSGi create the
> {{MDCScopeDecorator }}instance.
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