Experimental Physics and
Industrial Control System

Hi Ernest,

The EPICS base used for running softIOC is 3.14.12.5. 
The C# type CA servers are using CaSharpServer module and the Labview type CA servers are using the NI DSC module. 
Another thing I forgot to mention yestoday, all the C# type CA servers did not lost the 'exist eatablished TCP connection with clients', but they could not response to any new CA search requests(by caget or CSS), while the Labview type CA servers lost TCP connections. All the hung up CA servers did not output any error messages.

Regards,
Yuliang


> -----原始邮件-----
> 发件人: "Williams Jr., Ernest L." <[email protected]>
> 发送时间: 2017年4月15日 星期六
> 收件人: "Zhang Yuliang" <[email protected]>, tech-talk <[email protected]>
> 抄送: 
> 主题: RE: partial (damaged?) UDP msg
> 
> Hi,
> 
> Please provide more information:
> Such as what version of EPICS are you running for your CA server and clients?
> 
> 
> Cheers,
> Ernest
> ________________________________________
> From: [email protected] [[email protected]] on behalf of Zhang Yuliang [[email protected]]
> Sent: Saturday, April 15, 2017 4:27 AM
> To: tech-talk
> Subject: CAS: partial (damaged?) UDP msg
> 
> Hi all,
> 
> I found that one soft ioc output the following information:
> 
> epics> CAS: partial (damaged?) UDP msg of 8 bytes from 10.1.204.140:54439 ?
> CAS: partial (damaged?) UDP msg of 8 bytes from 10.1.204.140:54439 ?
> CAS: partial (damaged?) UDP msg of 8 bytes from 10.1.204.140:54439 ?
> CAS: partial (damaged?) UDP msg of 8 bytes from 10.1.204.140:54439 ?
> CAS: partial (damaged?) UDP msg of 8 bytes from 10.1.204.140:54439 ?
> CAS: partial (damaged?) UDP msg of 8 bytes from 10.1.204.140:54439 ?
> CAS: partial (damaged?) UDP msg of 8 bytes from 10.1.204.140:54439 ?
> CAS: partial (damaged?) UDP msg of 8 bytes from 10.1.204.140:54439 ?
> CAS: partial (damaged?) UDP msg of 8 bytes from 10.1.204.140:54439 ?
> CAS: request from 10.1.204.140:54439 => CAS: Missaligned protocol rejected
> CAS: Request from 10.1.204.140:54439 => cmmd=0 cid=0x4143435f type=0 count=3100 postsize=3100
> CAS: Request from 10.1.204.140:54439 =>   available=0x4c524254  N=3 paddr=(nil)
> CAS: invalid (damaged?) UDP request from 10.1.204.140:54439 ?
> CAS: request from 10.1.204.140:54439 => CAS: Missaligned protocol rejected
> CAS: Request from 10.1.204.140:54439 => cmmd=0 cid=0x4143435f type=0 count=3100 postsize=3100
> CAS: Request from 10.1.204.140:54439 =>   available=0x4c524254  N=3 paddr=(nil)
> CAS: invalid (damaged?) UDP request from 10.1.204.140:54439 ?
> CAS: partial (damaged?) UDP msg of 8 bytes from 10.1.204.140:54439 ?
> CAS: partial (damaged?) UDP msg of 8 bytes from 10.1.204.140:54439 ?
> 
> At that time, all of our Labview and C# type CA servers hung up(the standard iocs were all ok), no response to the ca search from clients. After we reboot the ca servers, it return to OK.
> It is the first time we saw this and I think the ca server hung up event has relation to the invalid request.
> 
> Regards,
> Zhang Yuliang
> 
> 

References:

CAS: partial (damaged?) UDP msg Zhang Yuliang

RE: partial (damaged?) UDP msg Williams Jr., Ernest L.

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