JBoss6部署报 java.lang.IllegalStateException service=EJB3 is already installed 解决办法
12:49:24,540 ERROR [org.jboss.kernel.plugins.dependency.AbstractKernelController] Error installing to Real: name=vfs:///C:/tools/jboss-6.1.0.Final/server/default/deploy/loqate.ear state=PreReal mode=Manual requiredState=Real: org.jboss.deployers.spi.DeploymentException: Error deploying: jboss.j2ee:ear=loqate.ear,jar=loqate-ejb-1.1.0.jar,name=LoqateManagerBeanImpl,service=EJB3
at org.jboss.deployers.spi.DeploymentException.rethrowAsDeploymentException(DeploymentException.java:49) [:2.2.2.GA]
at org.jboss.deployers.vfs.deployer.kernel.BeanMetaDataDeployer.deploy(BeanMetaDataDeployer.java:187) [:2.2.2.GA]
at org.jboss.deployers.vfs.deployer.kernel.BeanMetaDataDeployer.deploy(BeanMetaDataDeployer.java:58) [:2.2.2.GA]
at org.jboss.deployers.spi.deployer.helpers.AbstractSimpleRealDeployer.internalDeploy(AbstractSimpleRealDeployer.java:63) [:2.2.2.GA]
at org.jboss.deployers.spi.deployer.helpers.AbstractRealDeployer.deploy(AbstractRealDeployer.java:55) [:2.2.2.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.doInstallParentFirst(DeployersImpl.java:1571) [:2.2.2.GA]
at org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFirst(DeployersImpl.java:1603) [: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_26]
at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317) [:1.6.0_26]
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150) [:1.6.0_26]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:98) [:1.6.0_26]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:180) [:1.6.0_26]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:204) [:1.6.0_26]
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) [:1.6.0_26]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) [:1.6.0_26]
at java.lang.Thread.run(Thread.java:662) [:1.6.0_26]
Caused by: java.lang.IllegalStateException: jboss.j2ee:ear=loqate.ear,jar=loqate-ejb-1.1.0.jar,name=LoqateManagerBeanImpl,service=EJB3 is already installed.
at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:835) [jboss-dependency.jar:2.2.0.SP2]
at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:641) [jboss-dependency.jar:2.2.0.SP2]
at org.jboss.deployers.vfs.deployer.kernel.BeanMetaDataDeployer.deploy(BeanMetaDataDeployer.java:182) [:2.2.2.GA]
... 43 more
原因：
我在写Bean的时候同时用了下面两个注解
@Singleton @Stateless
EJB3.1不可以同时用这两个注解，EJB3及以前版本可以用
解决办法：
只用其中一个。
还有其他可能原因：
If an EJB jar deployment specifies a dependency and this dependency is restarted, the deployment or start of the EJB would fail with an IllegalStateException message similar to the following:
Caused by: java.lang.IllegalStateException: jboss.j2ee:ear=helloWorld.ear,jar=helloWorld-ejb.jar,name=HelloBean,service=EJB3 is already installed.This was caused because the EJB's deployment was duplicated during the installation or start. To resolve this problem before upgrading to EAP 5.1.2, either redeploy the dependent EJB or restart the server. This problem has been fixed and this workaround is not required once you have upgraded.
引自： http://docs.redhat.com/docs/en-US/JBoss_Enterprise_Application_Platform/5/html/Release_Notes_5.1.2/ch04.html
欢迎各位爱好者补充。