Bruce Sanders [https://community.jboss.org/people/brucesanders63] created the discussion
"Unexpected error during load of:javax.management.MBeanAttributeInfo: java.lang.LinkageError: loader constraint violation:" To view the discussion, visit: https://community.jboss.org/message/833429#833429 -------------------------------------------------------------- I'm running JBoss 6.1 Final on an XP machine w/SP3. I'm using MyEcplise instead of Eclipse. In the last couple of weeks I'm starting to get the above error when deploying the bean. There are two other developers on our team w/the same setup that do not get any errors deploying the same source code/bean. I have copied another developer's JBOSS 6.1 code to my computer and the issue goes away. That developer is using the same code. FYI: The javasource code has no errors. I'm trying to run jboss from the command prompt but I get a java_home is not set even though it is and it start's up in MyEclipse without a problem. Below is the complete exception dump. I've found nothing on goggle regarding this issue. By the way, the below exception is constantly repeated as though it's trying to redeploy the bean. 09:22:01,367 WARN [org.jboss.detailed.classloader.ClassLoaderManager] Unexpected error during load of:javax.management.MBeanAttributeInfo: java.lang.LinkageError: loader constraint violation: loader (instance of org/jboss/classloader/spi/base/BaseClassLoader) previously initiated loading for a different type with name "javax/management/MBeanAttributeInfo" at java.lang.ClassLoader.defineClass1(Native Method) [:1.6.0_13] at java.lang.ClassLoader.defineClass(ClassLoader.java:621) [:1.6.0_13] at org.jboss.classloader.spi.base.BaseClassLoader.access$200(BaseClassLoader.java:52) [jboss-classloader.jar:2.2.1.GA] at org.jboss.classloader.spi.base.BaseClassLoader$2.run(BaseClassLoader.java:650) [jboss-classloader.jar:2.2.1.GA] at org.jboss.classloader.spi.base.BaseClassLoader$2.run(BaseClassLoader.java:609) [jboss-classloader.jar:2.2.1.GA] at java.security.AccessController.doPrivileged(Native Method) [:1.6.0_13] at org.jboss.classloader.spi.base.BaseClassLoader.loadClassLocally(BaseClassLoader.java:608) [jboss-classloader.jar:2.2.1.GA] at org.jboss.classloader.spi.base.BaseClassLoader.loadClassLocally(BaseClassLoader.java:585) [jboss-classloader.jar:2.2.1.GA] at org.jboss.classloader.spi.base.BaseDelegateLoader.loadClass(BaseDelegateLoader.java:156) [jboss-classloader.jar:2.2.1.GA] at org.jboss.classloader.spi.filter.FilteredDelegateLoader.doLoadClass(FilteredDelegateLoader.java:141) [jboss-classloader.jar:2.2.1.GA] at org.jboss.classloader.spi.filter.FilteredDelegateLoader.loadClass(FilteredDelegateLoader.java:132) [jboss-classloader.jar:2.2.1.GA] at org.jboss.classloader.spi.base.ClassLoadingTask$ThreadTask.run(ClassLoadingTask.java:461) [jboss-classloader.jar:2.2.1.GA] at org.jboss.classloader.spi.base.ClassLoaderManager.nextTask(ClassLoaderManager.java:262) [jboss-classloader.jar:2.2.1.GA] at org.jboss.classloader.spi.base.ClassLoaderManager.process(ClassLoaderManager.java:161) [jboss-classloader.jar:2.2.1.GA] at org.jboss.classloader.spi.base.BaseClassLoaderDomain.loadClass(BaseClassLoaderDomain.java:280) [jboss-classloader.jar:2.2.1.GA] at org.jboss.classloader.spi.base.BaseClassLoaderDomain.loadClass(BaseClassLoaderDomain.java:1172) [jboss-classloader.jar:2.2.1.GA] at org.jboss.classloader.spi.base.BaseClassLoader.loadClassFromDomain(BaseClassLoader.java:886) [jboss-classloader.jar:2.2.1.GA] at org.jboss.classloader.spi.base.BaseClassLoader.doLoadClass(BaseClassLoader.java:505) [jboss-classloader.jar:2.2.1.GA] at org.jboss.classloader.spi.base.BaseClassLoader.loadClass(BaseClassLoader.java:450) [jboss-classloader.jar:2.2.1.GA] at java.lang.ClassLoader.loadClass(ClassLoader.java:252) [:1.6.0_13] at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320) [:1.6.0_13] at java.lang.Class.getDeclaredConstructors0(Native Method) [:1.6.0_13] at java.lang.Class.privateGetDeclaredConstructors(Class.java:2389) [:1.6.0_13] at java.lang.Class.getDeclaredConstructors(Class.java:1836) [:1.6.0_13] at org.jboss.reflect.plugins.introspection.IntrospectionTypeInfoFactoryImpl.getDeclaredConstructors(IntrospectionTypeInfoFactoryImpl.java:576) [jboss-reflect.jar:2.2.1.SP1] at org.jboss.reflect.plugins.introspection.IntrospectionTypeInfoFactoryImpl.getConstructors(IntrospectionTypeInfoFactoryImpl.java:134) [jboss-reflect.jar:2.2.1.SP1] at org.jboss.reflect.plugins.ClassInfoImpl.getDeclaredConstructors(ClassInfoImpl.java:446) [jboss-reflect.jar:2.2.1.SP1] at org.jboss.scanning.plugins.visitor.ClassHierarchyResourceVisitor.handleClass(ClassHierarchyResourceVisitor.java:79) [:1.0.0.GA] at org.jboss.scanning.plugins.visitor.ReflectResourceVisitor.doVisit(ReflectResourceVisitor.java:108) [:1.0.0.GA] at org.jboss.scanning.plugins.visitor.ReflectResourceVisitor.visit(ReflectResourceVisitor.java:86) [:1.0.0.GA] at org.jboss.scanning.annotations.plugins.AnnotationsScanningPlugin.visit(AnnotationsScanningPlugin.java:89) [:1.0.0.GA] at org.jboss.scanning.spi.helpers.ScanningPluginWrapper.visit(ScanningPluginWrapper.java:112) [:1.0.0.GA] at org.jboss.classloading.plugins.visitor.FederatedResourceVisitor.visit(FederatedResourceVisitor.java:101) [jboss-classloading.jar:2.2.1.GA] at org.jboss.classloading.plugins.vfs.VFSResourceVisitor.visit(VFSResourceVisitor.java:264) [jboss-classloading-vfs.jar:2.2.1.GA] at org.jboss.vfs.VirtualFile.visit(VirtualFile.java:409) [jboss-vfs.jar:3.0.1.GA] at org.jboss.vfs.VirtualFile.visit(VirtualFile.java:411) [jboss-vfs.jar:3.0.1.GA] at org.jboss.vfs.VirtualFile.visit(VirtualFile.java:411) [jboss-vfs.jar:3.0.1.GA] at org.jboss.vfs.VirtualFile.visit(VirtualFile.java:397) [jboss-vfs.jar:3.0.1.GA] at org.jboss.classloading.plugins.vfs.VFSResourceVisitor.visit(VFSResourceVisitor.java:102) [jboss-classloading-vfs.jar:2.2.1.GA] at org.jboss.deployers.vfs.plugins.classloader.VFSDeploymentClassLoaderPolicyModule.visit(VFSDeploymentClassLoaderPolicyModule.java:181) [:2.2.2.GA] at org.jboss.scanning.plugins.DeploymentUnitScanner.scan(DeploymentUnitScanner.java:111) [:1.0.0.GA] at org.jboss.scanning.spi.helpers.UrlScanner.scan(UrlScanner.java:96) [:1.0.0.GA] at org.jboss.scanning.deployers.ScanningDeployer.deploy(ScanningDeployer.java:95) [:1.0.0.GA] at org.jboss.deployers.plugins.deployers.DeployerWrapper.deploy(DeployerWrapper.java:179) [:2.2.2.GA] at org.jboss.deployers.plugins.deployers.DeployersImpl.doDeploy(DeployersImpl.java:1832) [:2.2.2.GA] at org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFirst(DeployersImpl.java:1550) [:2.2.2.GA] at org.jboss.deployers.plugins.deployers.DeployersImpl.install(DeployersImpl.java:1491) [:2.2.2.GA] at org.jboss.dependency.plugins.AbstractControllerContext.install(AbstractControllerContext.java:379) [jboss-dependency.jar:2.2.0.SP2] at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:2044) [jboss-dependency.jar:2.2.0.SP2] at org.jboss.dependency.plugins.AbstractController.incrementState(AbstractController.java:1083) [jboss-dependency.jar:2.2.0.SP2] at org.jboss.dependency.plugins.AbstractController.executeOrIncrementStateDirectly(AbstractController.java:1322) [jboss-dependency.jar:2.2.0.SP2] at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1246) [jboss-dependency.jar:2.2.0.SP2] at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1139) [jboss-dependency.jar:2.2.0.SP2] at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:939) [jboss-dependency.jar:2.2.0.SP2] at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:654) [jboss-dependency.jar:2.2.0.SP2] at org.jboss.deployers.plugins.deployers.DeployersImpl.change(DeployersImpl.java:1983) [:2.2.2.GA] at org.jboss.deployers.plugins.deployers.DeployersImpl.process(DeployersImpl.java:1076) [:2.2.2.GA] at org.jboss.deployers.plugins.main.MainDeployerImpl.process(MainDeployerImpl.java:679) [:2.2.2.GA] at org.jboss.system.server.profileservice.deployers.MainDeployerPlugin.process(MainDeployerPlugin.java:106) [:6.1.0.Final] at org.jboss.profileservice.dependency.ProfileControllerContext$DelegateDeployer.process(ProfileControllerContext.java:143) [:0.2.2] at org.jboss.profileservice.deployment.hotdeploy.HDScanner$HDScanAction.deploy(HDScanner.java:240) [:0.2.2] at org.jboss.profileservice.deployment.hotdeploy.HDScanner$HDScanAction.complete(HDScanner.java:192) [:0.2.2] at org.jboss.profileservice.management.TwoPCActionWrapper.doComplete(TwoPCActionWrapper.java:57) [:0.2.2] at org.jboss.profileservice.management.actions.AbstractTwoPhaseModificationAction.complete(AbstractTwoPhaseModificationAction.java:74) [:0.2.2] at org.jboss.profileservice.management.actions.AbstractTwoPhaseModificationAction.prepare(AbstractTwoPhaseModificationAction.java:95) [:0.2.2] at org.jboss.profileservice.management.ModificationSession.prepare(ModificationSession.java:87) [:0.2.2] at org.jboss.profileservice.management.AbstractActionController.internalPerfom(AbstractActionController.java:234) [:0.2.2] at org.jboss.profileservice.management.AbstractActionController.performWrite(AbstractActionController.java:213) [:0.2.2] at org.jboss.profileservice.management.AbstractActionController.perform(AbstractActionController.java:150) [:0.2.2] at org.jboss.profileservice.management.AbstractActionController.perform(AbstractActionController.java:135) [:0.2.2] at org.jboss.profileservice.deployment.hotdeploy.HDScanner.scan(HDScanner.java:146) [:0.2.2] at org.jboss.profileservice.deployment.hotdeploy.HDScanner.run(HDScanner.java:90) [:0.2.2] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441) [:1.6.0_13] at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317) [:1.6.0_13] at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150) [:1.6.0_13] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:98) [:1.6.0_13] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:181) [:1.6.0_13] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:205) [:1.6.0_13] at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) [:1.6.0_13] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) [:1.6.0_13] at java.lang.Thread.run(Thread.java:619) [:1.6.0_13] -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/833429#833429] Start a new discussion in 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