topic Re: Socket Error !! in Operating System - HP-UX

Socket Error !!

Monit Kapoor — Tue, 04 Sep 2001 10:06:55 GMT

I am running a Cadence tool called "icms".I am able run this tool graphically on my system, however if i invoke this in the command-line mode "icms -nograph", i get the following error :
==============================
Binding TCP Socket: Address already in use
cannot establish tcp listening socket: Address already in use
Trying to connect an existing tcp listening socket...
*WARNING* Unable to open -nograph X Window Display
==============================
I have checked for patch compares with similiar systems and found no difference.Can someone explain to me what these errors are and how to resolve ?

System details are as follows:

OS Revision: HP-UX 11.00
Main Memory: 8388 MB
Swap : 22970 MB
Model: 9000/785/J6000
No of CPUs : 2
CPU Speed (in MHz): 552

Re: Socket Error !!

Magdi KAMAL — Tue, 04 Sep 2001 10:34:14 GMT

Hi Monit,

You are giving a socket number already in use, so the bind process can not handle it.

You may choose another free socket number and rebind.

Magdi

Re: Socket Error !!

Sridhar Bhaskarla — Tue, 04 Sep 2001 13:45:12 GMT

You need to free up that socket. If you know the port what your application is using, you can do a netstat -an and check for the port to see what state it is in.

You can either reboot the box to get rid of the port or use "tcp_discon_by_addr" an unsupported parameter of ndd.

Check this thread out

http://forums.itrc.hp.com/cm/QuestionAnswer/1,1150,0xb5815220af9bd5118ff10090279cd0f9,00.html

-Sri

Re: Socket Error !!

rick jones — Tue, 04 Sep 2001 17:28:40 GMT

DO NOT use the tcp_doscon_by_addr. It is a massive, ugly KLUDGE that should never have been known outside the lab. It is definitely unsupported and should be used only at your own great peril or under the close personal supervision of HP Support people.

If you use tusc with the verbose settings, you can see which port the command is trying to bind. Then you can use that information with lsof to see which process has the port bound and consider terminating that process. If there is no process, it could be that there are still old TCP connections in the TIME_WAIT state laying around with that local port number

If that is the case, the proper fix is to get the app fixed. It should be setting SO_REUSEADDR before calling bind(). Anything else is merely treating a symptom, perhaps in ways that will come back to bite you.

Re: Socket Error !!

Monit Kapoor — Thu, 06 Sep 2001 06:29:27 GMT

Thnaks for all your responses.However i ran tusc and all i saw was error like EADDRINUSE after a while.I have rebooted many times and also ensured no other apps are using sockets.spoke to the developer team and they said the app is OK coz the same binary runs fine on other systems.Also please note that the same binary runs ok in the graphical mode.The socket error only comes in "-nograph" mode.