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https://issues.apache.org/jira/browse/CAMEL-9026?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14645664#comment-14645664
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Thomas Diesler commented on CAMEL-9026:
---------------------------------------
[~ancosen] I suspect your run your test with a flat surefire classpath. In
which case the test sees the transitive tree of mvn dependencies in scope test,
provided, compile. If you do the same thing in a modular environment (i.e.
wildfly) it would behave very differently.
Although it is reasonable to assume that a deployment can see camel-kafka APIs,
it is incorrect to assume that camel-kafka can use the deployments classloader
to load internals that only camel-kafka should see.
The handling/caching of classloaders in Kafka is a tragedy as well as it
reliance on a particular TCCL. An API that works well in a modular environment
makes little assumptions about classloaders. Instead it provides the caller
with a means to pass in a CL of its choice.
In this particular case, camel-kafka would want to pass to Kafka its own CL to
load the StringEncoder
> ClassNotFoundException: kafka.serializer.StringEncoder
> ------------------------------------------------------
>
> Key: CAMEL-9026
> URL: https://issues.apache.org/jira/browse/CAMEL-9026
> Project: Camel
> Issue Type: Bug
> Components: camel-kafka
> Reporter: Thomas Diesler
> Assignee: Andrea Cosentino
> Fix For: 2.16.0
>
>
> KafkaEndpoint cannot load the StringEncoder because we do not expose the
> Kafka API to user code. It's an implementation detail of the camel-kafka
> component and only visible to that class loader
> {code}
> Caused by: java.lang.ClassNotFoundException: kafka.serializer.StringEncoder
> at
> org.apache.camel.impl.DefaultClassResolver.resolveMandatoryClass(DefaultClassResolver.java:80)
> at
> org.apache.camel.component.kafka.KafkaEndpoint.createProducer(KafkaEndpoint.java:83)
> at
> org.apache.camel.impl.ProducerCache.doGetProducer(ProducerCache.java:431)
> {code}
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