Looking in the hudson runs there those tests that started failing in build #855:

org.jboss.test.ee5client.unit.SimpleResourceUnitTestCase.testJNDI
org.jboss.test.ee5client.unit.SimpleResourceUnitTestCase.testClientLauncher
org.jboss.test.web.test.WebIntegrationUnitTestCase.testENCServlet
org.jboss.test.webservice.admindevel.ExampleTestCase(tests-webservice).testHelloString
org.jboss.test.webservice.admindevel.ExampleTestCase(tests-webservice).testHelloBean
org.jboss.test.webservice.admindevel.ExampleTestCase(tests-webservice).testHelloArray
org.jboss.test.webservice.admindevel.ExplodedExampleTestCase(tests-webservice).testHelloString
org.jboss.test.webservice.admindevel.RedeployExampleTestCase(tests-webservice).testHelloString
org.jboss.test.webservice.admindevel.RedeployExampleTestCase(tests-webservice).testHelloBean
org.jboss.test.webservice.admindevel.RedeployExampleTestCase(tests-webservice).testHelloArray
org.jboss.test.xslt.test.ScopedXalanUnitTestCase.testScopedXalanDeployment
org.jboss.test.web.test.UserInRoleUnitTestCase.testRoleWithoutLink

I only looked into the ScopedXalanUnitTestCase and I see an NPE coming from Ejb3ClientDeployer:
18:21:30,515 ERROR [Ejb3ClientDeployer] Could not deploy vfszip:/X:/cvs/jboss-pu
blic/jboss-head/testsuite/output/lib/xalan-check-scoped.sar/xalan-2.5.2.jar
java.lang.NullPointerException
at org.jboss.ejb3.deployers.Ejb3ClientDeployer.deploy(Ejb3ClientDeployer
.java:128)
at org.jboss.ejb3.deployers.Ejb3ClientDeployer.deploy(Ejb3ClientDeployer
.java:60)
at org.jboss.deployers.vfs.spi.deployer.AbstractSimpleVFSRealDeployer.de
ploy(AbstractSimpleVFSRealDeployer.java:56)
at org.jboss.deployers.spi.deployer.helpers.AbstractSimpleRealDeployer.i
nternalDeploy(AbstractSimpleRealDeployer.java:62)
at org.jboss.deployers.spi.deployer.helpers.AbstractRealDeployer.deploy(
AbstractRealDeployer.java:50)
at org.jboss.deployers.plugins.deployers.DeployerWrapper.deploy(Deployer
Wrapper.java:169)
at org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFi
rst(DeployersImpl.java:970)
at org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFi
rst(DeployersImpl.java:1023)
at org.jboss.deployers.plugins.deployers.DeployersImpl.install(Deployers
Impl.java:911)
at org.jboss.dependency.plugins.AbstractControllerContext.install(Abstra
ctControllerContext.java:348)
at org.jboss.dependency.plugins.AbstractController.install(AbstractContr
oller.java:1522)
at org.jboss.dependency.plugins.AbstractController.incrementState(Abstra
ctController.java:898)
at org.jboss.dependency.plugins.AbstractController.resolveContexts(Abstr
actController.java:1026)
at org.jboss.dependency.plugins.AbstractController.resolveContexts(Abstr
actController.java:948)
at org.jboss.dependency.plugins.AbstractController.change(AbstractContro
ller.java:786)
at org.jboss.dependency.plugins.AbstractController.change(AbstractContro
ller.java:519)
at org.jboss.deployers.plugins.deployers.DeployersImpl.process(Deployers
Impl.java:594)
at org.jboss.deployers.plugins.main.MainDeployerImpl.process(MainDeploye
rImpl.java:541)
at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:812)
at org.jboss.deployment.MainDeployer.redeploy(MainDeployer.java:587)
at sun.reflect.GeneratedMethodAccessor417.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatch
er.java:157)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:96)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.
java:264)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:668)
at sun.reflect.GeneratedMethodAccessor176.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.jmx.connector.invoker.InvokerAdaptorService.invoke(InvokerA
daptorService.java:270)
at sun.reflect.GeneratedMethodAccessor174.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatch
er.java:157)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:96)
at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractIntercept
or.java:138)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:90)
at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelM
BeanOperationInterceptor.java:140)
at org.jboss.jmx.connector.invoker.SerializableInterceptor.invoke(Serial
izableInterceptor.java:74)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:90)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.
java:264)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:668)
at org.jboss.invocation.jrmp.server.JRMPProxyFactory.invoke(JRMPProxyFac
tory.java:179)
at sun.reflect.GeneratedMethodAccessor173.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatch
er.java:157)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:96)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.
java:264)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:668)
at org.jboss.invocation.jrmp.server.JRMPInvoker$MBeanServerAction.invoke
(JRMPInvoker.java:815)
at org.jboss.invocation.jrmp.server.JRMPInvoker.invoke(JRMPInvoker.java:
416)
at sun.reflect.GeneratedMethodAccessor172.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:294)
at sun.rmi.transport.Transport$1.run(Transport.java:153)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:149)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:4
66)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport
.java:707)

Given that build #855 had changes related to the EJB3ClientDeployer that shows the NPE, I must assume this is the source of the regression:

1. JBAS-5895, workaround deployment failure by ignore exceptions thrown when trying to access the element owner. (detail/FishEye)
2. JBAS-5892, delay the loading of the JBossClientMetaData until the client container class loader is in place (detail/FishEye)

http://hudson.qa.jboss.com/hudson/view/JBoss%20AS/job/JBoss-AS-5.0.x-TestSuite-sun15/855/