Experimental Physics and
Industrial Control System

Hello Brian,

The R3.13 DB CA link message is generated by the default CA exception
handler. In R3.13.4 the DB CA link code must be overriding the default
CA exception handler and providing a new subsystem specific message.
Marty is on vacation this week, but he should be able to answer your
question in more detail when he returns.

The channel name is not provided because clients receive one connection
lost exception for each circuit that is terminated and there could be
many, many channels all using one circuit. If the client code needs to
print a channel specific connection lost message then it could use the
connection callback handler, but this might not be popular as the
channel count increases.

Jeff

> -----Original Message-----
> From: Brian McAllister [mailto:[email protected]]
> Sent: Tuesday, April 16, 2002 4:42 PM
> To: [email protected]
> Subject: CA "connection lost" messages
> 
> 
> We have been converting from EPICS R3.13.1 to R3.13.4.
> 
> One difference I have noted is in the messages logged when a CA
> connection
> is lost.
> 
> 3.13.1:
> 
> Sat Apr 13 11:19:31 2002
> CA.Client.Diagnostic..............................................
> Sat Apr 13 11:19:31 2002     Message: "Network connection lost"
> Sat Apr 13 11:19:31 2002     Severity: "Warning" Context:
> "172.16.0.17:5064"
> Sat Apr 13 11:19:31 2002     Source File: ../iocinf.c Line Number:
1479
> Sat Apr 13 11:19:31
> 2002
..................................................................
> 
> 3.13.4:
> 
> Sat Apr 13 11:19:31 2002 dbCa:exceptionCallback stat Network
connection
> lost channel unknown
> 
> 
> While the new format is clearer and more concise, I have found it
useful
> to
> know what system was serving the channel, as the channel name is not
> available.  Can the IP address be added back into these messages ?
> 
> ----
> Brian McAllister                    Controls Programmer/Beam Physicist
> [email protected]                        MIT-Bates Linear Accelerator
> (617) 253-9537                                           Middleton, MA

References:

CA "connection lost" messages Brian McAllister

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