JBoss AS 7.1.0 Final fails to start and server hangs with my war file : Here is the error log i gets.
NOTE: My war needs some jars which were put inside endorsed dir in JBoss 5.X . Seems JBoss picking some other XML libraries over mine.

17:21:44,787 DEBUG [org.apache.axiom.om.util.StAXUtils] (Start Level Event Dispatcher) About to create XMLInputFactory implementation with classloader=org.eclipse.core.runtime.internal.adaptor.ContextFinder@2a4134e0
17:21:44,788 DEBUG [org.apache.axiom.om.util.StAXUtils] (Start Level Event Dispatcher) The classloader for javax.xml.stream.XMLInputFactory is: org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader@76557c15
17:21:44,789 DEBUG [org.apache.axiom.om.util.StAXUtils] (Start Level Event Dispatcher) Failed creation of XMLInputFactory implementation with classloader=org.eclipse.core.runtime.internal.adaptor.ContextFinder@2a4134e0
17:21:44,789 DEBUG [org.apache.axiom.om.util.StAXUtils] (Start Level Event Dispatcher) Exception is=java.lang.ClassCastException: _redirected._XMLInputFactory cannot be cast to javax.xml.stream.XMLInputFactory
17:21:44,789 DEBUG [org.apache.axiom.om.util.StAXUtils] (Start Level Event Dispatcher) Attempting with classloader: org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader@76557c15
17:21:44,795 DEBUG [org.apache.jasper.compiler.JspRuntimeContext] (MSC service thread 1-14) Parent class loader is: ModuleClassLoader for Module "deployment.wso2greg.war:main" from Service Module Loader
17:21:44,796 DEBUG [org.apache.jasper.servlet.JspServlet] (MSC service thread 1-14) Scratch dir for the JSP engine is: /home/subash/wso2-supprt/greg_on_jboss/jboss-as-7.1.0.Final/standalone/tmp/work/jboss.web/default-host/wso2greg
17:21:44,797 DEBUG [org.apache.jasper.servlet.JspServlet] (MSC service thread 1-14) IMPORTANT: Do not modify the generated servlets
17:21:44,797 DEBUG [org.apache.catalina.core.StandardContext] (MSC service thread 1-14) Configuring application event listeners
17:21:44,798 DEBUG [org.apache.catalina.core.StandardContext] (MSC service thread 1-14) Starting completed
17:21:44,801 INFO [org.jboss.web] (MSC service thread 1-14) JBAS018210: Registering web context: /wso2greg
17:21:44,803 DEBUG [org.jboss.as.security] (MSC service thread 1-11) Qualified url patterns:

{/=PatternInfo[pattern=/,type=3,isOverriden=false,qualifiers=[]]}

17:21:44,825 INFO [org.jboss.as.server] (DeploymentScanner-threads - 2) JBAS018559: Deployed "wso2greg.war"
17:22:22,630 DEBUG [org.apache.axiom.om.util.StAXUtils] (OSGi Console) About to create XMLInputFactory implementation with classloader=org.eclipse.core.runtime.internal.adaptor.ContextFinder@2a4134e0
17:22:22,631 DEBUG [org.apache.axiom.om.util.StAXUtils] (OSGi Console) The classloader for javax.xml.stream.XMLInputFactory is: org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader@76557c15
17:22:22,634 DEBUG [org.apache.axiom.om.util.StAXUtils] (OSGi Console) Failed creation of XMLInputFactory implementation with classloader=org.eclipse.core.runtime.internal.adaptor.ContextFinder@2a4134e0
17:22:22,635 DEBUG [org.apache.axiom.om.util.StAXUtils] (OSGi Console) Exception is=java.lang.ClassCastException: _redirected._XMLInputFactory cannot be cast to javax.xml.stream.XMLInputFactory
17:22:22,636 DEBUG [org.apache.axiom.om.util.StAXUtils] (OSGi Console) Attempting with classloader: org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader@76557c15
17:22:37,399 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329911557399 sessioncount 0
17:22:37,400 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 1 expired sessions: 0
17:22:37,401 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329911557401 sessioncount 0
17:22:37,402 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 1 expired sessions: 0
17:23:37,405 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329911617405 sessioncount 0
17:23:37,406 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 1 expired sessions: 0
17:23:37,407 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329911617407 sessioncount 0
17:23:37,408 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 1 expired sessions: 0
17:24:37,411 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329911677411 sessioncount 0
17:24:37,412 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 1 expired sessions: 0
17:24:37,413 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329911677413 sessioncount 0
17:24:37,414 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 1 expired sessions: 0
17:25:37,417 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329911737417 sessioncount 0
17:25:37,418 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 1 expired sessions: 0
17:25:37,419 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329911737419 sessioncount 0
17:25:37,420 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 1 expired sessions: 0
17:26:37,423 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329911797423 sessioncount 0
17:26:37,423 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 0 expired sessions: 0
17:26:37,423 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329911797423 sessioncount 0
17:26:37,424 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 1 expired sessions: 0
17:27:37,425 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329911857425 sessioncount 0
17:27:37,426 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 1 expired sessions: 0
17:27:37,427 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329911857427 sessioncount 0
17:27:37,428 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 1 expired sessions: 0
17:28:37,431 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329911917431 sessioncount 0
17:28:37,432 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 1 expired sessions: 0
17:28:37,433 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329911917433 sessioncount 0
17:28:37,434 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 1 expired sessions: 0
17:29:37,436 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329911977436 sessioncount 0
17:29:37,437 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 1 expired sessions: 0
17:29:37,438 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329911977438 sessioncount 0
17:29:37,439 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 1 expired sessions: 0
17:30:37,442 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329912037441 sessioncount 0
17:30:37,443 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 2 expired sessions: 0
17:30:37,444 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329912037444 sessioncount 0
17:30:37,444 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 0 expired sessions: 0
17:31:37,447 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329912097447 sessioncount 0
17:31:37,448 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 1 expired sessions: 0
17:31:37,449 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329912097449 sessioncount 0
17:31:37,451 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 2 expired sessions: 0
17:32:37,454 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329912157454 sessioncount 0
17:32:37,455 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 1 expired sessions: 0
17:32:37,456 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329912157456 sessioncount 0
17:32:37,457 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 1 expired sessions: 0
17:33:37,459 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329912217459 sessioncount 0
17:33:37,460 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 1 expired sessions: 0
17:33:37,461 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329912217461 sessioncount 0
17:33:37,462 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 1 expired sessions: 0
17:34:37,465 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329912277465 sessioncount 0
17:34:37,466 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 1 expired sessions: 0
17:34:37,467 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329912277467 sessioncount 0
17:34:37,468 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 1 expired sessions: 0
17:35:37,470 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329912337470 sessioncount 0
17:35:37,471 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 1 expired sessions: 0
17:35:37,472 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329912337472 sessioncount 0
17:35:37,473 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 1 expired sessions: 0
17:36:37,475 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329912397475 sessioncount 0
17:36:37,475 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 0 expired sessions: 0
17:36:37,476 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329912397476 sessioncount 0
17:36:37,476 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 0 expired sessions: 0
17:37:37,478 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329912457478 sessioncount 0
17:37:37,479 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 1 expired sessions: 0
17:37:37,480 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329912457480 sessioncount 0
17:37:37,481 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 1 expired sessions: 0
17:38:37,483 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329912517483 sessioncount 0
17:38:37,484 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 1 expired sessions: 0
17:38:37,485 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329912517485 sessioncount 0
17:38:37,486 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 1 expired sessions: 0
17:39:37,487 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329912577487 sessioncount 0
17:39:37,488 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 1 expired sessions: 0
17:39:37,489 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329912577489 sessioncount 0
17:39:37,490 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 1 expired sessions: 0
17:40:37,492 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329912637492 sessioncount 0
17:40:37,493 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 1 expired sessions: 0
17:40:37,494 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329912637494 sessioncount 0
17:40:37,495 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 1 expired sessions: 0
17:41:37,497 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329912697497 sessioncount 0
17:41:37,498 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 1 expired sessions: 0
17:41:37,499 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329912697499 sessioncount 0
17:41:37,500 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 1 expired sessions: 0
17:42:37,503 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329912757503 sessioncount 0
17:42:37,504 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 1 expired sessions: 0
17:42:37,505 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329912757505 sessioncount 0
17:42:37,506 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 1 expired sessions: 0
17:43:37,508 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) Start expire sessions StandardManager at 1329912817508 sessioncount 0
17:43:37,509 DEBUG [org.apache.catalina.session.ManagerBase] (ContainerBackgroundProcessor[StandardEngine[jboss.web]]) End expire sessions StandardManager processingTime 1 expired sessions: 0