IOC error message on camonitor disconnect

[<freddie.akeroyd@stfc.ac.uk>]

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

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