Hi, I deployed Base801.war on Jboss EAP 6.1 with JDK 7. I Jboss can not start web service because of this error: Encountered invalid class name 'org.xmlpull.mxp1.MXParser, org.xmlpull.mxp1_serializer.MXSerializer' for service type 'org.xmlpull.v1. XmlPullParserFactory' Error starting context /BaseX801: java.lang.IllegalArgumentException: JBWEB000250: Child container with name default already exists Do you have any idea on how to fix it? 09:05:22,956 INFO [org.jboss.as.server.deployment] (MSC service thread 1-8) JBAS015876: Starting deployment of "BaseX801.war" (runtime-name: "BaseX801.war") 09:05:23,326 WARN [org.jboss.as.server.deployment] (MSC service thread 1-8) JBAS015893: Encountered invalid class name 'org.xmlpull.mxp1.MXParser,org.xmlpull.mxp1_serializer.MXSerializer' for service type 'org.xmlpull.v1.XmlPullParserFactory' 09:05:23,445 INFO [org.jboss.web] (ServerService Thread Pool -- 88) JBAS018210: Register web context: /BaseX801 09:05:23,448 ERROR [org.apache.catalina.core] (ServerService Thread Pool -- 88) JBWEB001097: Error starting context /BaseX801: java.lang.IllegalArgumentException: JBWEB000250: Child container with name default already exists at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:794) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1] at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:785) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1] at org.apache.catalina.core.StandardContext.addChild(StandardContext.java:1862) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1] at org.jboss.as.web.deployment.JBossContextConfig.processWebMetaData(JBossContextConfig.java:471) [jboss-as-web-7.2.1.Final-redhat-10.jar:7.2.1.Final-redhat-10] at org.jboss.as.web.deployment.JBossContextConfig.applicationWebConfig(JBossContextConfig.java:201) [jboss-as-web-7.2.1.Final-redhat-10.jar:7.2.1.Final-redhat-10] at org.apache.catalina.startup.ContextConfig.start(ContextConfig.java:354) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1] at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:153) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1] at org.jboss.as.web.deployment.JBossContextConfig.lifecycleEvent(JBossContextConfig.java:194) [jboss-as-web-7.2.1.Final-redhat-10.jar:7.2.1.Final-redhat-10] at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:115) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1] at org.apache.catalina.core.StandardContext.start(StandardContext.java:3717) [jbossweb-7.2.2.Final-redhat-1.jar:7.2.2.Final-redhat-1] at org.jboss.as.web.deployment.WebDeploymentService.doStart(WebDeploymentService.java:156) [jboss-as-web-7.2.1.Final-redhat-10.jar:7.2.1.Final-redhat-10] at org.jboss.as.web.deployment.WebDeploymentService.access$000(WebDeploymentService.java:60) [jboss-as-web-7.2.1.Final-redhat-10.jar:7.2.1.Final-redhat-10] at org.jboss.as.web.deployment.WebDeploymentService$1.run(WebDeploymentService.java:93) [jboss-as-web-7.2.1.Final-redhat-10.jar:7.2.1.Final-redhat-10] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) [rt.jar:1.7.0_67] at java.util.concurrent.FutureTask.run(FutureTask.java:262) [rt.jar:1.7.0_67] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [rt.jar:1.7.0_67] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [rt.jar:1.7.0_67] at java.lang.Thread.run(Thread.java:745) [rt.jar:1.7.0_67] at org.jboss.threads.JBossThread.run(JBossThread.java:122) 09:05:23,469 ERROR [org.apache.catalina.core] (ServerService Thread Pool -- 88) JBWEB001103: Error detected during context /BaseX801 start, will stop it 09:05:23,470 ERROR [org.jboss.msc.service.fail] (ServerService Thread Pool -- 88) MSC000001: Failed to start service jboss.web.deployment.default-host./BaseX801: org.jboss.msc.service.StartException in service jboss.web.deployment.default-host./BaseX801: org.jboss.msc.service.StartException in anonymous service: JBAS018040: Failed to start context at org.jboss.as.web.deployment.WebDeploymentService$1.run(WebDeploymentService.java:96) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) [rt.jar:1.7.0_67] at java.util.concurrent.FutureTask.run(FutureTask.java:262) [rt.jar:1.7.0_67] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [rt.jar:1.7.0_67] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [rt.jar:1.7.0_67] at java.lang.Thread.run(Thread.java:745) [rt.jar:1.7.0_67] at org.jboss.threads.JBossThread.run(JBossThread.java:122) Caused by: org.jboss.msc.service.StartException in anonymous service: JBAS018040: Failed to start context at org.jboss.as.web.deployment.WebDeploymentService.doStart(WebDeploymentService.java:161) at org.jboss.as.web.deployment.WebDeploymentService.access$000(WebDeploymentService.java:60) at org.jboss.as.web.deployment.WebDeploymentService$1.run(WebDeploymentService.java:93) ... 6 more 09:05:23,685 ERROR [org.jboss.as.server] (DeploymentScanner-threads - 2) JBAS015870: Deploy of deployment "BaseX801.war" was rolled back with the following failure message: {"JBAS014671: Failed services" => {"jboss.web.deployment.default-host./BaseX801" => "org.jboss.msc.service.StartException in service jboss.web.deployment.default-host./BaseX801: org.jboss.msc.service.StartException in anonymous service: JBAS018040: Failed to start context Caused by: org.jboss.msc.service.StartException in anonymous service: JBAS018040: Failed to start context"}} 09:05:23,766 INFO [org.jboss.as.server.deployment] (MSC service thread 1-3) JBAS015877: Stopped deployment BaseX801.war (runtime-name: BaseX801.war) in 80ms