Comment 6 for bug 541371

Another occurrence?

https://epics.anl.gov/tech-talk/2020/msg00894.php

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