We had a problem today with a Tomcat application on RHEL (admittedly on Intel). This application asks for a person's userid and password. It then validates these via LDAP. The LDAP server is our Windows AD. The URL used actually has 5 IP addresses returned. The application always uses the same IP address and only that IP address. It ignores the other 4 entirely as best as we can tell. I have been told that the IP which it uses is the "closest" one. I can tell from the IP address, that it is on a different subnet from the others, so I guess that is "closest". Today, that AD server simply did not respond correctly. "netstat" showed a status of SYN_SENT and the application eventually "timed out" with an error message to that effect. It never tried any of the alternatives. We eventually had to point the application to a single, specific, Windows AD box. It then began to work.
Now my question: Is it normal for a Java application running under Tomcat6 to always use the "closest" IP address? Is this caused by: (1) the code in the application (which is close sourced, so I can't look at it); (2) the way that Java (JDNI?) works?; (3) The way that the TCPIP stack on Linux works? If there is a better forum for this type of question, please tell me. I know Linux fairly well in my "home LAN" environment, which is Linux only. I know how to gen kernels and other things. But Enterprise Level LAN only confuse me. And I can't touch ours anyway (thanks be to God!). -- Q: What do theoretical physicists drink beer from? A: Ein Stein. Maranatha! John McKown ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
