Brian thinks this is due to http://jira.jboss.com/jira/browse/JBAS-4060. Looking earlier in the log I do see another war undeployment resulting in an NPE: | 2007-02-08 08:09:33,828 DEBUG [org.jboss.web.WebModule] Destroyed jboss.web.deployment:war=manifest-web.war,id=995861669 | 2007-02-08 08:09:33,843 ERROR [org.apache.coyote.http11.Http11Processor] Error processing request | java.lang.NullPointerException | at org.apache.catalina.session.StandardSession.endAccess(StandardSession.java:638) | at org.apache.catalina.connector.Request.recycle(Request.java:419) | at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:239) | at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844) | at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:624) | at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:445) | at java.lang.Thread.run(Thread.java:595) | I'm not clear on how this affects subsequent deployments that claim they were successfully deployed. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4013116#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...