CODEWITHSUNDEEP
grailsdependencieslinkagerun-app
Đinh Hồng Châu
Đinh Hồng Châu

Reputation: 5440

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!

Upvotes: 9

Views: 13916

Answers (5)

jenk
jenk

Reputation: 1043

i suppose that i fix this problem. Solution of Steve Wall want not work for me on grails 2.0.0 because of Perm gen space / Out of memory during "grails run-app".

BuildConfig.groovy

....
inherits("global") {
    excludes 'xmlbeans', 'xbean'
}
....
runtime 'xmlbeans:xmlpublic:2.1.0'
runtime 'org.apache.poi:poi-ooxml:3.7'
....

Then download xbean-2.1.0.jar, and apply solution of Steve Wall:

jar xf xbean-2.1.0.jar
cd org
rm -rf w3c/
cd ..
rm xbean-2.1.0.jar
jar cf xbean-2.1.0.patched.jar *
cp xbean-2.1.0.patched.jar your_grails_project/lib/

For me it works fine! Good luck!

Upvotes: 1

Steve Wall
Steve Wall

Reputation: 1932

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.

  • Modify BuildConfig.groovy

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

  • Extract xmlbeans

    cd ~
    mkdir xmlbeantmp
    cd xmlbeantmp
    cp ~/.ivy2/cache/org.apache.xmlbeans/xmlbeans/jars/xmlbeans-2.3.0.jar .
    jar xf xmlbeans-2.3.0.jar

  • Remove offending class package

    cd org
    rm -rf w3c/

  • Recreate the jar

    cd ../
    rm xmlbean-2.3.0.jar
    jar cf xmlbean-2.3.0.jar *

  • Copy jar into your projects lib

    cp xmlbean-2.3.0.jar your_grails_project/lib/.

  • Show the love

    click answer up arrow. :)

Upvotes: 11

Maver23
Maver23

Reputation: 11

I had a similar problem and it was a cache issue. I deleted the .grails and .ivy2 directory (under the home) and it solved my troubles. Good Luck.

Upvotes: 1

tomc
tomc

Reputation: 1458

There's a conflict between one of POI's dependencies (xmlbeans) and grails. You can exclude it as follows:

dependencies {
    compile('org.apache.poi:poi-ooxml:3.7') { excludes "xmlbeans" }
}

The following links were useful in tracking down the problem:

Upvotes: 1

D&#243;nal
D&#243;nal

Reputation: 187399

I don't know if this will fix your problem, but my guess is that your depency on POI should probably be compile-time. Try changing your dependencies to:

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

Upvotes: 0

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