SocketException: Too many files open I had a similar problem and so I did a dump of the file descriptors being used by my app using lsof -p <process id>. Below was just some of the items shown. Over 1000 file descriptors were open. I noticed that the ports used were related to JMS, specifially the 8093 port. I went back to my code and noticed that I was leaving my connections to JMS open and wasn't closing them. After closing them and re running everything was fine. Hope that helps. java 15779 root 144u IPv6 292593 TCP localhost.localdomain:8093->localhost.localdomain:48164 (ESTABLISHED) java 15779 root 145u IPv6 292779 TCP localhost.localdomain:51129->localhost.localdomain:8093 (ESTABLISHED) java 15779 root 146u IPv6 292767 TCP localhost.localdomain:8093->localhost.localdomain:34418 (ESTABLISHED) java 15779 root 147u IPv6 292604 TCP localhost.localdomain:8093->localhost.localdomain:44921 (ESTABLISHED) java 15779 root 148u IPv6 292717 TCP localhost.localdomain:57241->localhost.localdomain:8093 (ESTABLISHED) java 15779 root 149u IPv6 292619 TCP localhost.localdomain:44921->localhost.localdomain:8093 (ESTABLISHED) java 15779 root 150u IPv6 292621 TCP localhost.localdomain:8093->localhost.localdomain:34506 (ESTABLISHED) java 15779 root 151u IPv6 292623 TCP localhost.localdomain:8093->localhost.localdomain:47555 (ESTABLISHED) java 15779 root 152u IPv6 292625 TCP localhost.localdomain:47555->localhost.localdomain:8093 (ESTABLISHED) java 15779 root 153u IPv6 292626 TCP localhost.localdomain:8093->localhost.localdomain:43375 (ESTABLISHED) java 15779 root 154u IPv6 292795 TCP localhost.localdomain:8093->localhost.localdomain:56269 (ESTABLISHED) java 15779 root 155u IPv6 292628 TCP localhost.localdomain:43375->localhost.localdomain:8093 (ESTABLISHED) java 15779 root 156u IPv6 292629 TCP localhost.localdomain:8093->localhost.localdomain:60267 (ESTABLISHED) java 15779 root 157u IPv6 292687 TCP localhost.localdomain:60267->localhost.localdomain:8093 (ESTABLISHED) java 15779 root 158u IPv6 292688 TCP localhost.localdomain:8093->localhost.localdomain:49439 (ESTABLISHED) java 15779 root 159u IPv6 292689 TCP localhost.localdomain:49439->localhost.localdomain:8093 (ESTABLISHED) java 15779 root 160u IPv6 292690 TCP localhost.localdomain:8093->localhost.localdomain:55873 (ESTABLISHED) java 15779 root 161u IPv6 292691 TCP localhost.localdomain:55873->localhost.localdomain:8093 (ESTABLISHED) java 15779 root 162u IPv6 292692 TCP localhost.localdomain:8093->localhost.localdomain:34455 (ESTABLISHED) java 15779 root 163u IPv6 292768 TCP localhost.localdomain:34418->localhost.localdomain:8093 (ESTABLISHED) java 15779 root 164u IPv6 292697 TCP localhost.localdomain:34455->localhost.localdomain:8093 (ESTABLISHED) java 15779 root 165u IPv6 292701 TCP localhost.localdomain:35166->localhost.localdomain:8093 (ESTABLISHED) java 15779 root 166u IPv6 292703 TCP localhost.localdomain:8093->localhost.localdomain:42612 (ESTABLISHED) java 15779 root 167u IPv6 292705 TCP localhost.localdomain:42612->localhost.localdomain:8093 (ESTABLISHED) java 15779 root 168u IPv6 292708 TCP localhost.localdomain:8093->localhost.localdomain:53619 (ESTABLISHED) java 15779 root 169u IPv6 292754 TCP localhost.localdomain:36840->localhost.localdomain:8093 (ESTABLISHED) java 15779 root 170u IPv6 292712 TCP localhost.localdomain:53619->localhost.localdomain:8093 (ESTABLISHED) java 15779 root 171u IPv6 292713 TCP localhost.localdomain:8093->localhost.localdomain:57241 (ESTABLISHED) java 15779 root 172u IPv6 292718 TCP localhost.localdomain:8093->localhost.localdomain:37514 (ESTABLISHED) java 15779 root 173u IPv6 292725 TCP localhost.localdomain:8093->localhost.localdomain:40510 (ESTABLISHED) java 15779 root 174u IPv6 292829 TCP localhost.localdomain:53124->localhost.localdomain:8093 (ESTABLISHED) java 15779 root 175u IPv6 292726 TCP localhost.localdomain:40510->localhost.localdomain:8093 (ESTABLISHED) java 15779 root 176u IPv6 292728 TCP localhost.localdomain:8093->localhost.localdomain:56741 (ESTABLISHED) java 15779 root 177u IPv6 292730 TCP localhost.localdomain:56741->localhost.localdomain:8093 (ESTABLISHED) java 15779 root 178u IPv6 292731 TCP localhost.localdomain:8093->localhost.localdomain:38639 (ESTABLISHED) java 15779 root 179u IPv6 292732 TCP localhost.localdomain:38639->localhost.localdomain:8093 (ESTABLISHED) java 15779 root 180u IPv6 292733 TCP localhost.localdomain:8093->localhost.localdomain:49641 (ESTABLISHED) java 15779 root 181u IPv6 292735 TCP localhost.localdomain:49641->localhost.localdomain:8093 (ESTABLISHED) java 15779 root 182u IPv6 292736 TCP localhost.localdomain:8093->localhost.localdomain:34933 (ESTABLISHED) java 15779 root 183u IPv6 292737 TCP localhost.localdomain:34933->localhost.localdomain:8093 (ESTABLISHED) java 15779 root 184u IPv6 292738 TCP localhost.localdomain:8093->localhost.localdomain:36580 (ESTABLISHED) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3986583#... 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