LinkageError: loader constraint violation: when resolving method "com.atlassian.confluence.setup.webwork.ConfluenceVelocityManager.getConfluenceVelocityContext()"

[Ricardo Martins]

I'm having trouble in running an add-on in Confluence 5.9. This seems to be related to a pom.xml configuration but after several combinations I haven't been able to figure out exactly what should change in order to build it with the right dependencies.

Does anyone have a clue on how to resolve this?

The stacktrace is as follows:

java.lang.RuntimeException: Error rendering template for decorator root
    at com.atlassian.confluence.setup.velocity.ApplyDecoratorDirective.render(ApplyDecoratorDirective.java:183)

caused by: java.lang.RuntimeException: Error rendering template for decorator page
    at com.atlassian.confluence.setup.velocity.ApplyDecoratorDirective.render(ApplyDecoratorDirective.java:183)

caused by: org.apache.velocity.exception.MethodInvocationException: Invocation of method 'xxx' in class com.xxx.xxx.VelocityBridge threw exception com.google.common.util.concurrent.ExecutionError: java.lang.LinkageError: loader constraint violation: when resolving method "com.atlassian.confluence.setup.webwork.ConfluenceVelocityManager.getConfluenceVelocityContext()Lorg/apache/velocity/context/Context;" the class loader (instance of org/apache/felix/framework/BundleWiringImpl$BundleClassLoaderJava5) of the current class, com/xxx/xxx/settings/ThemeSettings, and the class loader (instance of org/apache/catalina/loader/WebappClassLoader) for the method's defining class, com/atlassian/confluence/setup/webwork/ConfluenceVelocityManager, have different Class objects for the type org/apache/velocity/context/Context used in the signature at xxx/decorators/page.vmd[line 17, column 46]
    at org.apache.velocity.runtime.parser.node.ASTMethod.handleInvocationException(ASTMethod.java:351)

[Ricardo Martins · Accepted solution]

Fixed by adding the following to the pom.xml:

<Import-Package>
    org.apache.velocity.context;version="[${velocity.osgi.bound.version},${velocity.osgi.bound.version}]",
    *;resolution:=optional
</Import-Package>
 
<velocity.osgi.bound.version>1.6.4.atlassian_9</velocity.osgi.bound.version>

[Rina Nir (AC)]

Thanks, helped me!

[Mibex_Software]

I also had a very similar issue with using VelocityContext with Confluence 5.9. What helped is to use a plain map instead which I got by Map<String, Object> velocityContext = MacroUtils.defaultVelocityContext(); instead of using the VelocityContext class itself.

[Radko]

This did the trick for me. Thank you!

[Ricardo Martins]

It breaks on the following call: Context velocityContext = ConfluenceVelocityManager.getConfluenceVelocityContext();

[Panos]

Is an addon you created? Is it multipart maven project? Are you importing the correct api in the pom with scope provided? Share part of code that you think it is breaking. Other wise the error might fall in this category https://confluence.atlassian.com/display/CONFKB/'java.lang.RuntimeException+Error+rendering+template+for+decorator+root'+in+a+Page