EPICS Home

Experimental Physics and Industrial Control System


 
1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  <2006>  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021  2022  2023  2024  Index 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  <2006>  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021  2022  2023  2024 
<== Date ==> <== Thread ==>
Subject: RE: CA communication problems
From: "Jeff Hill" <[email protected]>
To: "'Christophe Moins'" <[email protected]>, <[email protected]>
Date: Mon, 17 Jul 2006 12:13:18 -0600 
> I have some problems of communication between an IOC and a client, both
> running on different machines on the same subnetwork on a similar
> environment (Epics v 13.4.7 under linux redhat 9.0 kernel 2.4.20-8).
> 
> At the beginning of the startup of the IOC, process variable values can
> be got without problems from a client (either a simple command line or a
> php script), but after a while, the data is not available any more and
> the following message shows up on the IOC side :
> 
> CAS: request from 192.168.101.21:55894 => "bad resource ID"
> CAS: Request from 192.168.101.21:55894 => cmmd=12 cid=0xffffffff type=0
> count=0 postsize=0
> CAS: Request from 192.168.101.21:55894 =>  available=0x1        N=0
> paddr=(nil)
> CAS: forcing disconnect from 192.168.101.21:55894
> 
> Would someone have an idea of what's going on ?

I have no guesses at this point, but instead a few questions.

O Is this Linux running on a typical Intel x86 computer? 

O What does the output from the "casr 10" command, typed into the IOC's
console when the failure is occurring, provide? 

O I would also look at the cpu, memory, and socket consumption in the IOC's
host using top and netstat.

O Is 192.168.101.21 the IP address of the host for the client that isn't
able to connect, or does the host IP in the message vary?

O Does the IOC appear to be functioning correctly in other respects when
this occurs?

O Does the IOC have any layered products (such as drivers) installed when
this occurs?

Jeff

> -----Original Message-----
> From: Christophe Moins [mailto:[email protected]]
> Sent: Monday, July 17, 2006 6:08 AM
> To: [email protected]
> Subject: CA communication problems
> 
> Hello,
> 
> I have some problems of communication between an IOC and a client, both
> running on different machines on the same subnetwork on a similar
> environment (Epics v 13.4.7 under linux redhat 9.0 kernel 2.4.20-8).
> 
> At the beginning of the startup of the IOC, process variable values can
> be got without problems from a client (either a simple command line or a
> php script), but after a while, the data is not available any more and
> the following message shows up on the IOC side :
> 
> CAS: request from 192.168.101.21:55894 => "bad resource ID"
> CAS: Request from 192.168.101.21:55894 => cmmd=12 cid=0xffffffff type=0
> count=0 postsize=0
> CAS: Request from 192.168.101.21:55894 =>  available=0x1        N=0
> paddr=(nil)
> CAS: forcing disconnect from 192.168.101.21:55894
> 
> Would someone have an idea of what's going on ?
> 
> Thanks for your help
> Christophe
Replies:
Re: CA communication problems Kay-Uwe Kasemir
Re: CA communication problems Christophe Moins
References:
CA communication problems Christophe Moins
Navigate by Date:
Prev: CA communication problems Christophe Moins
Next: Re: CA communication problems Kay-Uwe Kasemir
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  <2006>  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021  2022  2023  2024 
Navigate by Thread:
Prev: CA communication problems Christophe Moins
Next: Re: CA communication problems Kay-Uwe Kasemir
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  <2006>  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021  2022  2023  2024