May 2001
Intermediate to advanced
1088 pages
30h 13m
English
Content preview from Special Edition Using Java™ 2 Enterprise Edition
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Troubleshooting
Startup Problems
| Q1: | Why does it say the port is in use? |
| There is probably another program running that uses that socket number. Type netstat -a (if you're running Windows or Unix/Linux) and look for the port number you are trying to use. If you find the port and see the word LISTENING off to the right, that socket is in use. |
Using netstat
| Q1: | What does TIME_WAIT mean in netstat –a, and why do I get a port in use error when the port has a TIME_WAIT status? |
| Sometimes when you stop a server, it takes some time to shut down all the socket connections. You usually see TIME_WAIT occur when you stop a server that has active connections without first stopping all the clients. Give it a minute or two and it should stop waiting. |
UDP Problems ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.