Experimental Physics and
Industrial Control System

[email protected] (Jeff Hill) · Tue, 22 Feb 2000 14:23:04 -0700

Geoff,

I am not sure why your connections are timing out while they are being established.
What OS is your server running on? What OS is your client running on? Perhaps your server's
host is low on idle CPU time or perhaps it is low on file descriptors? There is an adjustable limit
on the maximum number of file descriptors in the vxWorks kernel. In vxWorks you can determine how
many file descriptors are in use by typing "fdShow()". You can look
at CPU usage with the "spy" utility on vxWorks.

>
> We're using R3.13.1.  I looked in iocinf.c at line 1479.  Here's the function.
> The messages I reported are coming out while I'm trying to connect a channel.
> Eventually the connect request times out.  Why does the server want to free
> resources associated with a client connection?

If the client detects (this is the client code that you are looking at) that the
server side of the TCP connection has disconnected or if the server has not responded
to a query after 30 seconds goes by without seeing a server beacon then it closes down
the connection and reclaims any associated resources.

> Here's what I see.  chanDisconnectCount is non-zero.
>
>         if (piiu == piiuCast) {       <====== piiu is not equal to piiuCast other wise
> chanDisconnectCount = 0u
>                 piiuCast = NULL;
>                 chanDisconnectCount = 0u;
>         }
>
> chanDisconnectCount gets set here.
>                 chanDisconnectCount = ellCount(&piiu->chidlist);
> ellCount returns the number of nodes that are found in a list.
>
> So there are still nodes in the list.  Why should this be an error?
>

If a connection is terminated and there are CA channels attached to it then the CA
client library generates a warning message. No warning message is generated if a
connection shuts down because the last channel on it was deleted.

Jeff

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System