Question

when I tried to run grails -Dgrails.env=local run-app, I got the below error

Server failed to start: java.lang.LinkageError: loader constraint violation: loader (instance of ) previously initiated loading for a different type with name “javax/management/MBeanServer”

After analysing I understood that it has something to do with “Two dependencies link the same jar with different versions”

I ran grails dependency-report, and here is the observation:

commons-beanutils by commons-beanutils 1.8.3 release default false 227 kB
commons-beanutils by commons-beanutils 1.8.0 release default true 0 kB(evicted by 1.8.3)

How do I exclude this jar or remove the linkage?

Answer 1

The dependency report should show what is pulling in the problematic jar. Once you have that, explicitly exclude it from the dependencies in your BuildConfig.groovy, like so:

grails.project.dependency.resolution = {
    dependencies {
        runtime("i-depend-on-beanutils-1.8.3") {
            excludes "beanutils"
        }
    }
}