Experimental Physics and
Industrial Control System

On 5/4/20 7:55 AM, Tagger, Jueri via Tech-talk wrote:
> callbackRequest: cbLow ring buffer full
> 
> A call to 'assert(ev_que->evque[ev_que->putix] == EVENTQEMPTY)'
> 
>     by thread 'CAS-client' failed in ../../../src/ioc/db/dbEvent.c line 769.
> 
> Dumping a stack trace of thread 'CAS-client':
> 
> [          0x54b86b]: ../../bin/linux-x86_64/CryD(epicsStackTrace+0x4b)
> 
> [          0x5467fa]: ../../bin/linux-x86_64/CryD(epicsAssert+0x3a)
> 
> [          0x4daa3b]: ../../bin/linux-x86_64/CryD(db_queue_event_log+0xcb)
> 
> [          0x4dac8d]: ../../bin/linux-x86_64/CryD(db_post_single_event+0x3d)
> 
> [          0x4ffce7]: ../../bin/linux-x86_64/CryD(event_add_action+0x1b7)
> 
> [          0x5005de]: ../../bin/linux-x86_64/CryD(camessage+0x9e)
> 
> [          0x4fd00c]: ../../bin/linux-x86_64/CryD(camsgtask+0x12c)
> 
> [          0x54789c]: ../../bin/linux-x86_64/CryD(start_routine+0xdc)
> 
> [    0x7f3c14cdf064]: /lib/x86_64-linux-gnu/libpthread.so.0(start_thread+0xc4)
> 
> [    0x7f3c13b9c62d]: /lib/x86_64-linux-gnu/libc.so.6(clone+0x6d)
> 
> EPICS Release EPICS R3.15.5.
> 
> Local time is 2020-05-03 13:45:51.091659821 EDT
> 
> Please E-mail this message to the author or to tech-talk at aps.anl.gov
> 
> Calling epicsThreadSuspendSelf()
> 
> Thread CAS-client (0x7f3bc4016f20) suspended
> 
> callbackRequest: cbLow ring buffer full
> 
>  
> 
> Any ideas?

The assert() failure catches my attention, although there has apparently been at least once
other occurrence.  Also associated with a callback queue overflow.

https://bugs.launchpad.net/epics-base/+bug/541371

References:

epicsThreadSuspendSelf() Tagger, Jueri via Tech-talk

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