EPICS Base

assert(status == epicsMutexLockOK) in dbEvent.c lines 477 & 493

Bug #1762543 reported by Andrew Johnson on 2018-04-09

This bug report is a duplicate of: Bug #1730982: Race in db_close_events(). Edit Remove

This bug affects 2 people

Affects		Status	Importance	Assigned to	Milestone
	EPICS Base	Triaged	Undecided	mdavidsaver	EPICS Base 3.14.12.8

Bug Description

Oleg Makarov reported:

yesterday EPICS PVs updates stalled on one of our IOCs. IOC reboot solve the problem.
I am posting log messages from IOC console below. EPICS version is 3.15.5.

Should some corrections to the CAS be made, so that erroneous request does not cause suspended threads?

Oleg

CAS: request from 164.54.103.102:38866 => CAS: Missaligned protocol rejected
CAS: Request from 164.54.103.102:38866 => cmmd=29797 cid=0x73000000 type=29793 count=29813 postsiz
e=29267
CAS: Request from 164.54.103.102:38866 => available=0x0 N=2 paddr=0x0
CAS: invalid (damaged?) UDP request from 164.54.103.102:38866 ?
CAS: message received at 2018-03-22 20:18:21

CAS: request from 164.54.103.102:54641 => CAS: Missaligned protocol rejected
CAS: Request from 164.54.103.102:54641 => cmmd=29797 cid=0x73000000 type=29793 count=29813 postsiz
e=29267
CAS: Request from 164.54.103.102:54641 => available=0x0 N=2 paddr=0x0
CAS: invalid (damaged?) UDP request from 164.54.103.102:54641 ?
CAS: message received at 2018-03-31 13:36:44

A call to 'assert(status == epicsMutexLockOK)'
by thread 'CAS-client' failed in ../../../src/ioc/db/dbEvent.c line 493.
EPICS Release EPICS R3.15.5.
Local time is 2018-04-07 19:59:10.227314800 CST/CDT
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Calling epicsThreadSuspendSelf()
Thread CAS-client (0x492c090) suspended

A call to 'assert(status == epicsMutexLockOK)'
by thread 'CAS-client' failed in ../../../src/ioc/db/dbEvent.c line 477.
EPICS Release EPICS R3.15.5.
Local time is 2018-04-08 08:04:00.242762000 CST/CDT
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Calling epicsThreadSuspendSelf()
Thread CAS-client (0x4c573d0) suspended

A call to 'assert(status == epicsMutexLockOK)'
by thread 'CAS-client' failed in ../../../src/ioc/db/dbEvent.c line 477.
EPICS Release EPICS R3.15.5.
Local time is 2018-04-08 08:06:45.226095334 CST/CDT
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Calling epicsThreadSuspendSelf()
Thread CAS-client (0x4b810a0) suspended

A call to 'assert(status == epicsMutexLockOK)'
by thread 'CAS-client' failed in ../../../src/ioc/db/dbEvent.c line 493.
EPICS Release EPICS R3.15.5.
Local time is 2018-04-08 08:11:10.776095352 CST/CDT
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Calling epicsThreadSuspendSelf()
Thread CAS-client (0x4962b00) suspended

A call to 'assert(status == epicsMutexLockOK)'
by thread 'CAS-client' failed in ../../../src/ioc/db/dbEvent.c line 477.
EPICS Release EPICS R3.15.5.
Local time is 2018-04-08 08:13:56.288060135 CST/CDT
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Calling epicsThreadSuspendSelf()
Thread CAS-client (0x4b8bf40) suspended

A call to 'assert(status == epicsMutexLockOK)'
by thread 'CAS-client' failed in ../../../src/ioc/db/dbEvent.c line 477.
EPICS Release EPICS R3.15.5.
Local time is 2018-04-08 08:17:01.421393463 CST/CDT
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Calling epicsThreadSuspendSelf()
Thread CAS-client (0x4bfbbc0) suspended

A call to 'assert(status == epicsMutexLockOK)'
by thread 'CAS-client' failed in ../../../src/ioc/db/dbEvent.c line 477.
EPICS Release EPICS R3.15.5.
Local time is 2018-04-08 08:19:30.938060149 CST/CDT
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Calling epicsThreadSuspendSelf()
Thread CAS-client (0x25d37f0) suspended

A call to 'assert(status == epicsMutexLockOK)'
by thread 'CAS-client' failed in ../../../src/ioc/db/dbEvent.c line 477.
EPICS Release EPICS R3.15.5.
Local time is 2018-04-08 08:22:36.554726791 CST/CDT
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Calling epicsThreadSuspendSelf()
Thread CAS-client (0x4c40d70) suspended

A call to 'assert(status == epicsMutexLockOK)'
by thread 'CAS-client' failed in ../../../src/ioc/db/dbEvent.c line 477.
EPICS Release EPICS R3.15.5.
Local time is 2018-04-08 08:23:58.421393463 CST/CDT
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Calling epicsThreadSuspendSelf()
Thread CAS-client (0x4c4a810) suspended

A call to 'assert(status == epicsMutexLockOK)'
by thread 'CAS-client' failed in ../../../src/ioc/db/dbEvent.c line 477.
EPICS Release EPICS R3.15.5.
Local time is 2018-04-08 08:28:55.938060149 CST/CDT
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Calling epicsThreadSuspendSelf()
Thread CAS-client (0x4c85be0) suspended

A call to 'assert(status == epicsMutexLockOK)'
by thread 'CAS-client' failed in ../../../src/ioc/db/dbEvent.c line 477.
EPICS Release EPICS R3.15.5.
Local time is 2018-04-08 08:40:05.300141941 CST/CDT
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Calling epicsThreadSuspendSelf()
Thread CAS-client (0x4c90690) suspended

23i:ioc2>
23i:ioc2>
23i:ioc2> reboot