One of our systems is crashing about every 3 days and I can't seem to
isolate the cause. Lately these are crashes with a Mac crash report
appearing on the screen.
Some system details are:
 - 4D Built Server app with v17.0 HF1 (64 bit Server with 64 Mac and
32 bit Windows Clients)
 - Mac and Windows Clients
 - Mac OS 10.13.5

What I know so far:
 - I have the Server Debug file. It ends with a "." and so the last
command appears to have executed.
 - I'm using the Report Info component, logging every 5 minutes. There
doesn't seem to be memory problems or run away cache issues.
 - I also know who was one each time it crashes and said out an email
to those users to find patterns (so far I've found none).
 - The crashes typically happen around 10am to 11am.
 - The client and server builds match.

I'm debating turning on the client debugger files and then harvesting
them afterwards when the user logs back in. I'm open to other
debugging techniques.

There are other v17 systems running on the same machine with zero issue.

Below is a snippet of the crash report. It seems to be different each
time, but here is the latest. Thread 73 crashed, so I only included
that one.

Thanks,

dave nasralla

------------------------------------
Process:               Corporate [93958]
Path:                  /Users/USER/*/Corporate
Server.app/Contents/MacOS/Corporate
Identifier:            4d.com.Corporate Server.app
Version:               17.0 build 17.226566 (???)
Code Type:             X86-64 (Native)
Parent Process:        ??? [1]
Responsible:           Corporate [93958]
User ID:               501

Date/Time:             2018-08-31 11:00:05.952 -0500
OS Version:            Mac OS X 10.13.5 (17F77)
Report Version:        12
Anonymous UUID:        723511FD-4CA0-6E8B-0642-883209248DFC


Time Awake Since Boot: 3700000 seconds

System Integrity Protection: enabled

Crashed Thread:        73  LabProjects List (id = -114)

Exception Type:        EXC_BAD_ACCESS (SIGSEGV)
Exception Codes:       EXC_I386_GPFLT
Exception Note:        EXC_CORPSE_NOTIFY

Termination Signal:    Segmentation fault: 11
Termination Reason:    Namespace SIGNAL, Code 0xb
Terminating Process:   exc handler [0]
----------------------------------------------------------


Thread 73 Crashed:: LabProjects List (id = -114)
0   4d.com.Corporate Server.app       0x000000010694fdbe
V4DConnection::OnPostpone(bool) + 40
1   4d.com.Corporate Server.app       0x0000000106b095f7
V4DServerUser::PostponeServiceConnection() + 35
2   4d.com.Corporate Server.app       0x0000000106b20567
V4DServer::exec_ConnectionPostpone(V4DRequestReply&, V4DTaskConcrete*,
short) + 395
3   4d.com.Corporate Server.app       0x0000000106b211ca
V4DServer::exec_streamreq(V4DRequestReply&, V4DTaskConcrete*) + 100
4   4d.com.Corporate Server.app       0x0000000106b1ddc3
V4DServer::execreq(V4DRequestReply&, V4DTaskConcrete*) + 297
5   4d.com.Corporate Server.app       0x0000000106b1c96f
V4DServer::ReadAndExecuteRequest(V4DTaskConcrete*, void*, void*, int)
+ 349
6   4d.com.Corporate Server.app       0x0000000106b1da6f
V4DServer::_ClientTask(V4DTaskConcrete*, VTaskParams_gereclient*) +
429
7   4d.com.Corporate Server.app       0x0000000106b1cc8f
V4DServer::ClientTask(V4DTaskConcrete*, xbox::IRefCountable*) + 81
8   4d.com.Corporate Server.app       0x0000000106928d93
Task4DProc(V4DTaskConcrete*) + 903
9   4d.com.Corporate Server.app       0x000000010696fe00
V4DTaskManager::_Task4DProc(xbox::VTask*) + 158
10  com.4d.kernel                     0x0000000108a34d4d
xbox::VTask::_Run() + 141
11  com.4d.kernel                     0x0000000108a3a0c6
xbox::XMacTask_fiber::_ThreadProc(void*) + 70
12  com.4d.kernel                     0x0000000108a6f0df
xbox::VMacFiber_thread::_ThreadProc(void*) + 31
13  com.apple.CoreServices.CarbonCore    0x00007fff504c3072
CooperativeThread + 282
14  libsystem_pthread.dylib           0x00007fff77464661 _pthread_body + 340
15  libsystem_pthread.dylib           0x00007fff7746450d _pthread_start + 377
16  libsystem_pthread.dylib           0x00007fff77463bf9 thread_start + 13


-- 
David Nasralla
Clean Air Engineering
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