petal1 [https://community.jboss.org/people/petal1] created the discussion "JNDI not resolving localhost to 127.0.0.1" To view the discussion, visit: https://community.jboss.org/message/719937#719937 -------------------------------------------------------------- Hello, I have an Amazon EC2 instance (could be any cloud server, or even any server I guess) running Open SuSE. I am running JBoss 4.0.4GA on there. When I do a JNDI lookup with a provider URL of "localhost:1099", I may get an error depending on what is in /etc/hosts. What I don't understand is why JBoss is not resolving localhost to 127.0.0.1. When /etc/hosts contains:     127.0.0.1              localhost     <external-ip-not-shown>  MYHOSTNAME then JBoss resolves localhost to the external IP. If the /etc/hosts file contains:     127.0.0.1              localhost     <internal-ip-not-shown> MYHOSTNAME then JBoss resolves localhost to the internal IP. So clearly /etc/hosts is involved in JBoss’s resolution of names. But when I do: dig localhost +short +identify It returns: 127.0.0.1 from server 172.16.0.23 in 80 ms. Apparently Amazon EC2 instances don't have any awareness of their external IP, so the /etc/hosts should reference only the internal IP address. Indeed my application works fine when the /etc/hosts file contains only the internal IP but my issue is why JBoss does not resolve localhost to 127.0.0.1 ? Just as a bit of extra info, I executed the code below:     InetAddress ina= InetAddress.getByName("localhost");    System.out.println("getCanonicalHostName()=" +ina.getCanonicalHostName());    System.out.println("getHostAddress()=" +ina.getHostAddress());    System.out.println("getHostName()=" +ina.getHostName());    System.out.println("toString()=" +ina.toString()); and it returned:      getCanonicalHostName()=localhost      getHostAddress()=127.0.0.1      getHostName()=localhost      toString()=localhost/127.0.0.1 Thank you for any help. -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/719937#719937] Start a new discussion in JNDI and Naming at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]