Service launched by launchd suddenly not working....

Question

Hello,
I wrote a .plist file to launch a java app and made it bind to port 80. At first everything was fine. The application loaded, and I can point access the app via port 80 using Safari.
After that I mucked around testing other launchd options, and now the app no longer load becos "java.net.BindException: Address already in use:80"
The strange thing is that the app can be launched and bind to port 80 manually.
I checked the system, and no services are using port 80.
I tried deleting the launchd caches but the problem still occur.
Can somebody help? Is it a problem at OSX level? At JVM level?

Answer 1

Here is my .plist :
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>Label</key>
<string>ABC</string>
<key>OnDemand</key>
<true/>
<key>ProgramArguments</key>
<array>
<string>/usr/bin/java</string>
<string>-jar</string>
<string>abc.jar</string>
</array>
<key>Sockets</key>
<dict>
<key>Listeners</key>
<dict>
<key>SockServiceName</key>
<string>http</string>
</dict>
</dict>
<key>WorkingDirectory</key>
<string>/Users/abc/abc</string>
</dict>
</plist>