Experimental Physics and
Industrial Control System

"Bertrand H.J. Biritz" <[email protected]> · Sat, 5 Jul 2008 22:13:19 -0400

Dear Tech-talk,
I wrote a monitoring program using some of the example code from EPICS-
BASE and the lecture videos. It connects to an IOC every 5 minutes for
12 PV's and write their values to a text file.
The only problem is that it eventually fails with the following error
message:
epicsSocketEnablePortUseForDatagramFanout: unable to set SO_REUSEADDR?

epicsSocketDestroy: failed to close a socket because "Bad file
descriptor"

CAC: unable to create virtual circuit because "Too many open files"
the last line is repeated multiple times.
Now the relevant code snippet is:
while(1)
{
...
...
...
      /*
       * Here is where the CA calls happen
       */

 /* Initialize */
 status=ca_context_create(ca_disable_preemptive_callback);
      if(status != ECA_NORMAL)
	{
	  printf("ca_context_create failed:\n%s\n",ca_message(status));
	  exit(1);
	}
 /* Search */
 for(i = 0; i < 12; i++)

{

status
=
ca_create_channel
(pv[i],connectionChangedCB,NULL,CA_PRIORITY_DEFAULT,&pCh[i]);

if(status != ECA_NORMAL)

{

printf("ca_create_channel for pv%d failed:\n%s\n", i,
ca_message(status));

exit(1);

}

}
      /* Wait */
      startTime=curTime;
      ca_pend_event(timeout);
 /* Clear the channel */
 for(i = 0; i < 12; i++)

{

status=ca_clear_channel(pCh[i]);

if(status != ECA_NORMAL)

{

printf("ca_clear_channel for pv%d failed:\n%s\n", i,
ca_message(status));

}

}
 /* Exit */
      ca_context_destroy();
...
...
...
}
I thought I had included everything I need, but apparently I missed
something.
Any help would be greatly appreciated,
Bertrand
Happy post July 4th!

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System