grailsdependencieslinkagerun-app

java.lang.LinkageError: loader constraint violation in Grails project

I've built a Grails project with POI (include poi-3.7 and poi-ooxml-3.7). I've added these 2 external libraries to dependencies block in BuildConfig.groovy file of my project. There's nothing strange when I compiled it. But when I called the command "run-app" for that project, an error occured with below stacktrace: 

Base Directory: <path-to-my-project>
Resolving dependencies...
Dependencies resolved in 5546ms.
Running script D:\_TOOLS\STS\grails-1.3.5\scripts\RunApp.groovy
Environment set to development
Running Grails application..
2011-05-23 18:51:01,225 [main] ERROR context.GrailsContextLoader  - Error executing bootstraps: java.lang.LinkageError: loader constraint violation: loader (instance of <bootloader>) previously initiated loading for a different type with name "org/w3c/dom/DOMConfiguration"
org.codehaus.groovy.runtime.InvokerInvocationException: java.lang.LinkageError: loader constraint violation: loader (instance of <bootloader>) previously initiated loading for a different type with name "org/w3c/dom/DOMConfiguration"
    at grails.spring.BeanBuilder.invokeBeanDefiningClosure(BeanBuilder.java:723)
    at grails.spring.BeanBuilder.beans(BeanBuilder.java:573)
    at grails.spring.BeanBuilder.invokeMethod(BeanBuilder.java:519)
    at org.grails.tomcat.TomcatServer.start(TomcatServer.groovy:212)
    at grails.web.container.EmbeddableServer$start.call(Unknown Source)
    at RunApp$_run_closure5_closure12.doCall(RunApp:158)
    at RunApp$_run_closure5_closure12.doCall(RunApp)
    at _GrailsSettings_groovy$_run_closure10.doCall(_GrailsSettings_groovy:280)
    at _GrailsSettings_groovy$_run_closure10.call(_GrailsSettings_groovy)
    at RunApp$_run_closure5.doCall(RunApp:149)
    at RunApp$_run_closure5.call(RunApp)
    at RunApp.runInline(RunApp:116)
    at RunApp.this$4$runInline(RunApp)
    at RunApp$_run_closure1.doCall(RunApp:59)
    at RunApp$_run_closure1.doCall(RunApp:33)
    at gant.Gant$_dispatch_closure5.doCall(Gant.groovy:381)
    at gant.Gant$_dispatch_closure7.doCall(Gant.groovy:415)
    at gant.Gant$_dispatch_closure7.doCall(Gant.groovy)
    at gant.Gant.withBuildListeners(Gant.groovy:427)
    at gant.Gant.this$2$withBuildListeners(Gant.groovy)
    at gant.Gant$this$2$withBuildListeners.callCurrent(Unknown Source)
    at gant.Gant.dispatch(Gant.groovy:415)
    at gant.Gant.this$2$dispatch(Gant.groovy)
    at gant.Gant.invokeMethod(Gant.groovy)
    at gant.Gant.executeTargets(Gant.groovy:590)
    at gant.Gant.executeTargets(Gant.groovy:589)

Caused by: java.lang.LinkageError: loader constraint violation: loader (instance of <bootloader>) previously initiated loading for a different type with name "org/w3c/dom/DOMConfiguration"
    at java.lang.Class.getDeclaredMethods0(Native Method)
    at java.lang.Class.privateGetDeclaredMethods(Class.java:2427)
    at java.lang.Class.getDeclaredMethods(Class.java:1791)
    at java.security.AccessController.doPrivileged(Native Method)
    at org.codehaus.groovy.util.LazyReference.getLocked(LazyReference.java:46)
    at org.codehaus.groovy.util.LazyReference.get(LazyReference.java:33)
    at grails.spring.DynamicElementReader.invokeMethod(DynamicElementReader.groovy:121)
    ... 26 more

And here is my configuration: 

dependencies {  
        provided ('com.oracle:ojdbc6_g:11.2.0.1.0')  
        runtime ('org.apache.poi:poi:3.7', 'org.apache.poi:poi-ooxml:3.7')  
    }

How can I do to make solve this? Thank you so much!

Solution

  • Here's the fix we finally came around to after several hours of going back and forth. In short, exclude xmlbeans from poi and create another xmlbeans jar with the offending class removed. Here's the incantation to exorcise the evil linkage error.

    
    dependencies {
       compile ('org.apache.poi:poi-ooxml:3.6') {excludes "xmlbeans"}
    }