> Cexp>CAS: TCP_NODELAY option set failed
>
If this happens only rarely, in isolated situations, then maybe an
explanation is that the network kernel is somehow temporarily starved for
resources, or otherwise if the situation persists then perhaps the network
kernel was somehow comprised. In a vxWorks system lacking mmu protection
there could be a number of scenarios. I nevertheless had a quick look at the
code and I don?t see any obvious causes of trouble.
Jeff
______________________________________________________
Jeffrey O. Hill Email [email protected]
LANL MS H820 Voice 505 665 1831
Los Alamos NM 87545 USA FAX 505 665 5107
Message content: TSPA
With sufficient thrust, pigs fly just fine. However, this is
not necessarily a good idea. It is hard to be sure where they
are going to land, and it could be dangerous sitting under them
as they fly overhead. -- RFC 1925
> -----Original Message-----
> From: [email protected] [mailto:[email protected]]
> On Behalf Of Michael Davidsaver
> Sent: Tuesday, May 17, 2011 8:55 AM
> To: [email protected]
> Cc: Chabot, Daron
> Subject: TCP_NODELAY option set failed
>
> Cexp>
> Cexp>CAS: TCP_NODELAY option set failed
>
> I happened to notice this error in the log of one of our IOCs. I've not
> seen it before. It only happened once, but seemed suitable strange to
> be worth reporting.
>
> EPICS 3.14.11
> RTEMS 4.9.3 on a mvme3100
>
> Also deviocstats and the new mrfioc2 timing driver. The IOC was
> functioning correctly when I checked it.
>
> It looks like this error comes from create_tcp_client() in
> caservertask.c when setsockopt() for the NODELAY socket option fails for
> a newly connected CA client. Since I only see one message I assume the
> client was able to connect successfully on a retry.
>
> Has anyone else seen this error?
>
>
> Thanks,
> Michael
- References:
- TCP_NODELAY option set failed Michael Davidsaver
- Navigate by Date:
- Prev:
RE: Channel Access not connecting Jeff Hill
- Next:
RE: Handling failures in st.cmd Zelazny, Michael Stanley
- 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:
TCP_NODELAY option set failed Michael Davidsaver
- Next:
Simple VME digital I/O Ralph Lange
- 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
|