When i deploy my JSF 1.2 application war on deployment directory of JBoss AS7 server i got following exception and warnings
12:57:12,530 WARN [org.jboss.as.server.deployment] (MSC service thread 1-8) JBAS015893: Encountered invalid class name 'com.sun.jersey.json.impl.provider.entity.JSONListElementProvider$App' for service type 'javax.ws.rs.ext.MessageBodyReader'
12:57:12,531 WARN [org.jboss.as.server.deployment] (MSC service thread 1-8) JBAS015893: Encountered invalid class name 'com.sun.jersey.json.impl.provider.entity.JSONListElementProvider$General' for service type 'javax.ws.rs.ext.MessageBodyReader'
12:57:12,532 WARN [org.jboss.as.server.deployment] (MSC service thread 1-8) JBAS015893: Encountered invalid class name 'com.sun.jersey.json.impl.provider.entity.JSONArrayProvider$App' for service type 'javax.ws.rs.ext.MessageBodyReader'
12:57:12,532 WARN [org.jboss.as.server.deployment] (MSC service thread 1-8) JBAS015893: Encountered invalid class name 'com.sun.jersey.json.impl.provider.entity.JSONArrayProvider$General' for service type 'javax.ws.rs.ext.MessageBodyReader'
12:57:12,533 WARN [org.jboss.as.server.deployment] (MSC service thread 1-8) JBAS015893: Encountered invalid class name 'com.sun.jersey.json.impl.provider.entity.JSONObjectProvider$App' for service type 'javax.ws.rs.ext.MessageBodyReader'
12:57:12,534 WARN [org.jboss.as.server.deployment] (MSC service thread 1-8) JBAS015893: Encountered invalid class name 'com.sun.jersey.json.impl.provider.entity.JSONObjectProvider$General' for service type 'javax.ws.rs.ext.MessageBodyReader'
12:57:12,535 WARN [org.jboss.as.server.deployment] (MSC service thread 1-8) JBAS015893: Encountered invalid class name 'com.sun.jersey.server.impl.model.parameter.multivalued.StringReaderProviders$TypeFromStringEnum' for service type 'com.sun.jersey.spi.StringReaderProvider'
12:57:12,536 WARN [org.jboss.as.server.deployment] (MSC service thread 1-8) JBAS015893: Encountered invalid class name 'com.sun.jersey.server.impl.model.parameter.multivalued.StringReaderProviders$TypeValueOf' for service type 'com.sun.jersey.spi.StringReaderProvider'
12:57:12,537 WARN [org.jboss.as.server.deployment] (MSC service thread 1-8) JBAS015893: Encountered invalid class name 'com.sun.jersey.server.impl.model.parameter.multivalued.StringReaderProviders$TypeFromString' for service type 'com.sun.jersey.spi.StringReaderProvider'
12:57:12,538 WARN [org.jboss.as.server.deployment] (MSC service thread 1-8) JBAS015893: Encountered invalid class name 'com.sun.jersey.server.impl.model.parameter.multivalued.StringReaderProviders$StringConstructor' for service type 'com.sun.jersey.spi.StringReaderProvider'
12:57:12,539 WARN [org.jboss.as.server.deployment] (MSC service thread 1-8) JBAS015893: Encountered invalid class name 'com.sun.jersey.server.impl.model.parameter.multivalued.StringReaderProviders$DateProvider' for service type 'com.sun.jersey.spi.StringReaderProvider'
12:57:12,540 WARN [org.jboss.as.server.deployment] (MSC service thread 1-8) JBAS015893: Encountered invalid class name 'com.sun.jersey.server.impl.model.parameter.multivalued.JAXBStringReaderProviders$RootElementProvider' for service type 'com.sun.jersey.spi.StringReaderProvider'
12:57:13,798 ERROR [org.jboss.web] (MSC service thread 1-5) JBAS018211: Could not load JSF managed bean class: com.myimpl.view.bean.AgObjectBean
12:57:13,949 ERROR [org.jboss.web] (MSC service thread 1-5) JBAS018211: Could not load JSF managed bean class: com.myimpl.view.bean.EventCoGroupsBean
12:57:14,053 ERROR [org.jboss.web] (MSC service thread 1-5) JBAS018211: Could not load JSF managed bean class: com.myimpl.view.bean.JMXInfoBean
12:57:14,055 ERROR [org.jboss.web] (MSC service thread 1-5) JBAS018211: Could not load JSF managed bean class: com.myimpl.reports.view.bean.TrendBean
12:57:14,056 ERROR [org.jboss.web] (MSC service thread 1-5) JBAS018211: Could not load JSF managed bean class: com.myimpl.view.bean.SnmpInfoBean
12:57:14,072 ERROR [org.jboss.web] (MSC service thread 1-5) JBAS018211: Could not load JSF managed bean class: com.myimpl.view.bean.LinuxInfoBean
12:57:14,534 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-5) MSC00001: Failed to start service jboss.deployment.unit."myimpl.war".POST_MODULE: org.jboss.msc.service.StartException in service jboss.deployment.unit."myimpl.war".POST_MODULE: Failed to process phase POST_MODULE of deployment "myimpl.war"
at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:119) [jboss-as-server-7.1.1.Final.jar:7.1.1.Final]
at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1811) [jboss-msc-1.0.2.GA.jar:1.0.2.GA]
at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1746) [jboss-msc-1.0.2.GA.jar:1.0.2.GA]
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) [rt.jar:1.6.0_37]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) [rt.jar:1.6.0_37]
at java.lang.Thread.run(Thread.java:662) [rt.jar:1.6.0_37]
Caused by: org.jboss.as.server.deployment.DeploymentUnitProcessingException: JBAS011232: Only one JAX-RS Application Class allowed. com.sun.jersey.api.core.WebAppResourceConfig com.sun.jersey.api.core.DefaultResourceConfig com.sun.jersey.api.core.ScanningResourceConfig com.sun.jersey.api.core.ClasspathResourceConfig com.sun.jersey.api.core.ApplicationAdapter com.sun.jersey.api.core.ClassNamesResourceConfig com.sun.jersey.api.core.ResourceConfig com.sun.jersey.api.core.PackagesResourceConfig com.sun.jersey.server.impl.application.DeferredResourceConfig
at org.jboss.as.jaxrs.deployment.JaxrsScanningProcessor.scan(JaxrsScanningProcessor.java:209)
at org.jboss.as.jaxrs.deployment.JaxrsScanningProcessor.deploy(JaxrsScanningProcessor.java:105)
at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:113) [jboss-as-server-7.1.1.Final.jar:7.1.1.Final]
... 5 more
12:57:14,544 INFO [org.jboss.as] (MSC service thread 1-2) JBAS015951: Admin console listening on http://127.0.0.1:9990
12:57:14,545 ERROR [org.jboss.as] (MSC service thread 1-2) JBAS015875: JBoss AS 7.1.1.Final "Brontes" started (with errors) in 121295ms - Started 1422 of 1572 services (3 services failed or missing dependencies, 138 services are passive or on-demand)
12:57:14,551 INFO [org.jboss.as.server] (DeploymentScanner-threads - 2) JBAS015870: Deploy of deployment "myimpl.war" was rolled back with failure message {"JBAS014671: Failed services" => {"jboss.deployment.unit.\"myimpl.war\".POST_MODULE" => "org.jboss.msc.service.StartException in service jboss.deployment.unit.\"myimpl.war\".POST_MODULE: Failed to process phase POST_MODULE of deployment \"myimpl.war\""}}
12:57:14,552 INFO [org.jboss.as.server] (DeploymentScanner-threads - 2) JBAS015871: Deploy of deployment "WfAPI.jar" was rolled back with no failure message
12:57:14,580 INFO [org.jboss.as.server.deployment] (MSC service thread 1-5) JBAS015877: Stopped deployment WfAPI.jar in 27ms
12:57:14,651 INFO [org.jboss.as.server.deployment] (MSC service thread 1-5) JBAS015877: Stopped deployment myimpl.war in 99ms
But it working fine on JBoss 6.