What were the lines in the log file immediately before this line: 04:36:07,767 INFO [Server] JBoss SHUTDOWN: Undeploying all packages That line does not state what caused the server to shut down, only that it is shutting down. The lines before that will give some clues as to why the server shut down. Was there a line similar to the following: [Server] Runtime shutdown hook called, forceHalt: true If so, then the either your code or PDFBox called System.exit(), or an INT signal was sent to the server. The again, someone could have called the shutdown method on the jboss.system:type=Server MBean. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4004886#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...