Grails application won't run -

after installing export plugin can not run grails application , this

java.lang.linkageerror: loader constraint violation: loader (instance of <bootloader>) initiated loading different type name "org/xml/sax/saxparseexception" @ java.lang.class.getdeclaredmethods0(native method) @ java.lang.class.privategetdeclaredmethods(class.java:2427) @ java.lang.class.getdeclaredmethods(class.java:1791) @ java.security.accesscontroller.doprivileged(native method) @ org.codehaus.groovy.util.lazyreference.getlocked(lazyreference.java:46) @ org.codehaus.groovy.util.lazyreference.get(lazyreference.java:33) @ grails.util.pluginbuildsettings.getplugininfos(pluginbuildsettings.groovy:123) @ grails.util.pluginbuildsettings.getplugininfos(pluginbuildsettings.groovy) @ grails.util.pluginbuildsettings$getplugininfos.callcurrent(unknown source) @ grails.util.pluginbuildsettings.getplugininfo(pluginbuildsettings.groovy:167) @ grails.util.pluginbuildsettings$getplugininfo.callcurrent(unknown source) @ grails.util.pluginbuildsettings.getplugininfoforsource(pluginbuildsettings.groovy:208) @ org.codehaus.groovy.transform.asttransformationvisitor$3.call(asttransformationvisitor.java:302) @ org.codehaus.groovy.control.compilationunit.applytosourceunits(compilationunit.java:824) @ org.codehaus.groovy.control.compilationunit.dophaseoperation(compilationunit.java:521) @ org.codehaus.groovy.control.compilationunit.processphaseoperations(compilationunit.java:497) @ org.codehaus.groovy.control.compilationunit.compile(compilationunit.java:474) @ _grailsevents_groovy.run(_grailsevents_groovy:54) @ _grailsevents_groovy$run.call(unknown source) @ _grailsclean_groovy$run.call(unknown source) @ _grailsclean_groovy.run(_grailsclean_groovy:29) @ _grailsclean_groovy$run.call(unknown source) @ _grailsplugins_groovy$run.call(unknown source) @ _grailsplugins_groovy.run(_grailsplugins_groovy:32) @ _grailsplugins_groovy$run.call(unknown source) @ _grailsrun_groovy$run.call(unknown source) @ _grailsrun_groovy.run(_grailsrun_groovy:31) @ _grailsrun_groovy$run.call(unknown source) @ runapp.run(runapp.groovy:25) @ runapp$run.call(unknown source) @ gant.gant.preparetargets(gant.groovy:606) error loading event script file [/home/natalia/.grails/1.3.7/projects/mem1.1/plugins/tomcat-1.3.7/scripts/_events.groovy] loader constraint violation: loader (instance of <bootloader>) initiated loading different type name "org/xml/sax/saxparseexception" error executing script runapp: loader constraint violation: loader (instance of <bootloader>) initiated loading different type name "org/xml/sax/saxparseexception" java.lang.linkageerror: loader constraint violation: loader (instance of <bootloader>) initiated loading different type name "org/xml/sax/saxparseexception"     @ java.lang.class.getdeclaredmethods0(native method)     @ java.lang.class.privategetdeclaredmethods(class.java:2427)     @ java.lang.class.getdeclaredmethods(class.java:1791)     @ java.security.accesscontroller.doprivileged(native method)     @ org.codehaus.groovy.util.lazyreference.getlocked(lazyreference.java:46)     @ org.codehaus.groovy.util.lazyreference.get(lazyreference.java:33)     @ grails.util.pluginbuildsettings.getplugininfos(pluginbuildsettings.groovy:123)     @ grails.util.pluginbuildsettings.getplugininfos(pluginbuildsettings.groovy)     @ grails.util.pluginbuildsettings$getplugininfos.callcurrent(unknown source)     @ grails.util.pluginbuildsettings.getplugininfoforname(pluginbuildsettings.groovy:180)     @ grails.util.pluginbuildsettings$getplugininfoforname.call(unknown source)     @ _plugindependencies_groovy$_run_closure1.docall(_plugindependencies_groovy:66)     @ _packageplugins_groovy$_run_closure2.docall(_packageplugins_groovy:69)     @ _grailspackage_groovy$_run_closure2.docall(_grailspackage_groovy:81)     @ runapp$_run_closure1.docall(runapp.groovy:28)     @ gant.gant$_dispatch_closure5.docall(gant.groovy:381)     @ gant.gant$_dispatch_closure7.docall(gant.groovy:415)     @ gant.gant$_dispatch_closure7.docall(gant.groovy)     @ gant.gant.withbuildlisteners(gant.groovy:427)     @ gant.gant.this$2$withbuildlisteners(gant.groovy)     @ gant.gant$this$2$withbuildlisteners.callcurrent(unknown source)     @ gant.gant.dispatch(gant.groovy:415)     @ gant.gant.this$2$dispatch(gant.groovy)     @ gant.gant.invokemethod(gant.groovy)     @ gant.gant.executetargets(gant.groovy:590)     @ gant.gelpant.executetargets(gant.groovy:589) error executing script runapp: loader constraint violation: loader (instance of <bootloader>) initiated loading different type name "org/xml/sax/saxparseexception" 

what wrong? please help...

that seems result of classpath hell...

two dependencies link same jar different versions

check dependencies, spot guilty jar (which seems sax parser) , remove linkage in buildconfig.groovy

cheers

grooveek