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<== Date ==> <== Thread ==>

Subject: Re: IOC error message on camonitor disconnect
From: Michael Davidsaver <mdavidsaver@gmail.com>
To: freddie.akeroyd@stfc.ac.uk, tech-talk@aps.anl.gov
Date: Thu, 27 Jul 2017 12:01:02 +0200
This looks like it is related to:

https://bugs.launchpad.net/epics-base/+bug/541330

Although I suspect there is more than one bug involved.


On 07/26/2017 07:58 PM, freddie.akeroyd@stfc.ac.uk wrote:
> Apologies, forgot to include the stack trace:
> 
>  
> 
>                 dbCore.dll!cas_commit_msg(client * pClient, unsigned int
> size) Line 357               C
> 
>                dbCore.dll!vsend_err(const caHdrLargeArray * curp, int
> status, client * client, const char * pformat, char * args) Line
> 245                C
> 
>                dbCore.dll!send_err(const caHdrLargeArray * curp, int
> status, client * client, const char * pformat, ...) Line 264  C
> 
>                dbCore.dll!camessage(client * client) Line 2571 C
> 
>                 dbCore.dll!camsgtask(void * pParm) Line 129     C
> 
>                Com.dll!epicsWin32ThreadEntry(void * lpParameter) Line
> 501    C
> 
>  
> 
> Regards,
> 
>  
> 
> Freddie
> 
>  
> 
> *From:*tech-talk-bounces@aps.anl.gov
> [mailto:tech-talk-bounces@aps.anl.gov] *On Behalf Of
> *freddie.akeroyd@stfc.ac.uk
> *Sent:* 26 July 2017 18:25
> *To:* tech-talk@aps.anl.gov
> *Subject:* IOC error message on camonitor disconnect
> 
>  
> 
> Hi,
> 
>  
> 
> I am seeing this using EPICS base 3.15.5 running on windows x64. I start
> softIOC.exe and then repeatedly connect to a PV with camonitor and then
> CTRL-C the camonitor, each time I see either:
> 
>  
> 
> epics> CAS: request from 127.0.0.1:20272 => CAS: Missaligned protocol
> rejected
> 
> CAS: Request from 127.0.0.1:20272 => cmmd=26209 cid=0x150008 type=14592
> count=0 postsize=24885
> 
> CAS: Request from 127.0.0.1:20272 =>   available=0x0    N=1
> paddr=0000000000000000
> 
> CAS: forcing disconnect from 127.0.0.1:20272
> 
> epics>
> 
>  
> 
> or
> 
>  
> 
> A call to 'assert(size <= ntohs ( pMsg->m_postsize ))'
> 
>     by thread 'CAS-client' failed in ../../../src/ioc/rsrv/caserverio.c
> line 357.
> 
> Dumping a stack trace of thread 'CAS-client':
> 
> [  000007FEEE71D565]
> 
> [  000007FEEE71D206]
> 
> [  000007FEEE714EF8]
> 
> [  000007FEED1A6AD5]
> 
> [  000007FEED1AC21B]
> 
> [  000007FEED1AC29B]
> 
> [  000007FEED1AAF1C]
> 
> [  000007FEED1AAAE5]
> 
> [  000007FEEE7177F1]
> 
> [  000007FECEB3B0A8]
> 
> [  000007FECEB3AD11]
> 
> [  00000000771459CD]
> 
> [  000000007727A561]
> 
> EPICS Release EPICS R3.15.5.
> 
> Local time is 2017-07-26 16:38:50.636232257 GMT Daylight Time
> 
> Please E-mail this message to the author or to tech-talk@aps.anl.gov
> <mailto:tech-talk@aps.anl.gov>
> 
> Calling epicsThreadSuspendSelf()
> 
> Thread CAS-client (000000000281A040) suspended
> 
>  
> 
> It looks similar to the message reported in
> http://www.aps.anl.gov/epics/tech-talk/2016/msg01828.php
> 
>  
> 
> If I break into the program at the point of the assert I see the
> following details:
> 
>  
> 
> size = 56
> 
>  
> 
> *pMsg
> 
>    m_cmmd=256
> 
>    m_postsize=6144
> 
>    m_dataType=5120
> 
>    m_count = 256
> 
>    m_cid = 16777216
> 
>   m_available = 16777216
> 
>  
> 
> We only recently updated to 3.15.5 and I didn’t remember seeing such
> messages before, so I connected to a machine still running 3.14 and
> confirmed that I don’t get any errors reported for the same test on
> 3.14.12.6.
> 
>  
> 
> Regards,
> 
>  
> 
> Freddie
> 
>  
> 


Replies:
RE: IOC error message on camonitor disconnect freddie.akeroyd
References:
IOC error message on camonitor disconnect freddie.akeroyd
RE: IOC error message on camonitor disconnect freddie.akeroyd

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