Experimental Physics and Industrial Control System
Chris,
>
> A CA client application is giving the message:
> "Message: Channel Access Internal Failure"
> "Severity: Fatal"
> "Context bad client read io id from server"
>
> Unfortunately, this seems to be an intermitent failure
> that happens a few times a day while the client is polling
> some PVs.
>
> If you have any additional info. on this message, I'd like
> to know.
After a quick look in the source I see that this problem exists
in 3.12.1.1 and is fixed in 3.12.2.1. The problem was discovered
by Fred Vong at APS and was related to a race condition where
the CA client lib receives a message for a particular resource
(a channel or a monitor) shortly after that resource was deleted.
Jeff
______________________________________________________________________
Jeffrey O. Hill Internet [email protected]
LANL MS H820 Voice 505 665 1831
Los Alamos, NM 87545 USA FAX 505 665 5107
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