Groovy JsonBuilder classloading error in Wildfly-Camel 12 - apache-camel

Question

I am invoking JsonBuilder.toString() in Groovy code inside a Camel route. This Camel route runs inside Widlfly Camel 12.0. The code looks like so:
def builder = new JsonBuilder()
builder {
'myField': myFieldVal
}
return builder.toString()
The builder.toString() method invocation produces the following error:
Caused by: java.lang.NoClassDefFoundError: Could not initialize class
groovy.json.internal.FastStringUtils
But I do have the dependencies mentioned properly in pom.xml like so:
<dependency>
<groupId>org.apache.camel</groupId>
<artifactId>camel-groovy</artifactId>
<scope>provided</scope>
</dependency>
I also tried adding this extra dependency to resolve the problem:
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-json</artifactId>
<version>2.4.13</version>
</dependency>
But I still keep on getting the above exception. However when I run the same Camel code using the camel-maven-plugin, without deploying it inside Wildfly, it runs perfectly.
Can someone please help?
Thanks in advance.

Answer 1

I think the problem is that module org.apache.camel.script.groovy cannot access sun.misc.Unsafe. So I added the following module dependency to modules/system/layers/fuse/org/apache/camel/script/groovy/main/module.xml.
<module name="sun.jdk">
<imports>
<include path="sun/misc/Unsafe"/>
</imports>
</module>
Your example worked for me afterwards.