Ok - I will set things up and do my best to capture the failure and let you 
know when I have logs. 

Thanks for your help - appreciate it!

> On Jun 11, 2019, at 8:53 AM, Rainer Gerhards <[email protected]> wrote:
> 
> Caution - External Email;;;
> 
> ********************************************************************************************************************************************
> El mar., 11 jun. 2019 a las 14:33, Heaton, Tobias
> (<[email protected]>) escribió:
>> 
>> Hello Rainer,
>> 
>> Thank you for the information. I set the debug configuration, updated 
>> rsyslog and restarted. After about 5 minutes, the logs are starting to slow 
>> and the debug log is well over 12GB in size.
>> 
>> It seems having debug enabled slows general performance considerably and 
>> given the rate at which the debug log is building, finding relevant, helpful 
>> data might be a challenge...not to mention getting you the file itself!
> 
> If the 12GiB contain the actual error case, than it is not too bad - I
> am used to wading though large debug files. These files usually
> compress very well (xz recommended), so the transfer is also not too
> bad. It would be best, though, if we can go to a point where the log
> really stalls.
> 
> For starters, I would guess that the last minute or so of data could
> be interesting.
> 
> Rainer
>> 
>> Tobias
>> 
>> -----Original Message-----
>> From: Rainer Gerhards <[email protected]>
>> Sent: Tuesday, June 11, 2019 7:33 AM
>> To: rsyslog-users <[email protected]>
>> Cc: David Lang <[email protected]>; Heaton, Tobias <[email protected]>
>> Subject: Re: [rsyslog] 8.1905.0 Logging Stops
>> 
>> Caution - External Email;;;
>> 
>> ********************************************************************************************************************************************
>> Hi Tobias,
>> 
>> this is the "quick guide" to generate a debug log:
>> https://www.rsyslog.com/doc/v8-stable/troubleshooting/howtodebug.html
>> - just do the "regular debug" part and let it run until the problem
>> manifests.
>> 
>> We also have more elaborate ones, but I guess this one is sufficient
>> (let's keep it smooth and simple ;-)).
>> 
>> Rainer
>> 
>> El lun., 10 jun. 2019 a las 21:58, Heaton, Tobias via rsyslog
>> (<[email protected]>) escribió:
>>> 
>>> My apologies - I'm a little naïve when it comes to the debugging.
>>> 
>>> What's your recommendation on the best way to capture debug?
>>> 
>>> -----Original Message-----
>>> From: David Lang <[email protected]>
>>> Sent: Monday, June 10, 2019 3:50 PM
>>> To: Heaton, Tobias <[email protected]>
>>> Cc: David Lang <[email protected]>; Heaton, Tobias via rsyslog 
>>> <[email protected]>
>>> Subject: RE: [rsyslog] 8.1905.0 Logging Stops
>>> 
>>> Caution - External Email;;;
>>> 
>>> ********************************************************************************************************************************************
>>> by the way, looking at your evicted stats, you probably want to tweak your
>>> dynafilecachesize on some of your outputs (performance issue, probably not
>>> related to this issue)
>>> 
>>> data was still being processed by outputs through the 15:00:17 window. It 
>>> didn't
>>> stop until the 15:00:22 window.
>>> 
>>> If you can get a debug log (send to Rainer) through the time it crashes, 
>>> that
>>> would be helpful
>>> 
>>> Also, can you post your config?
>>> 
>>> David Lang
>>> 
>>>>  On Mon, 10 Jun 2019, Heaton, Tobias wrote:
>>>> 
>>>> Date: Mon, 10 Jun 2019 19:37:31 +0000
>>>> From: "Heaton, Tobias" <[email protected]>
>>>> To: David Lang <[email protected]>
>>>> Cc: "Heaton, Tobias via rsyslog" <[email protected]>
>>>> Subject: RE: [rsyslog] 8.1905.0 Logging Stops
>>>> 
>>>> Attached is a snippet of the impstats. Logs stopped writing at 15:00:01.
>>>> 
>>>> -----Original Message-----
>>>> From: David Lang <[email protected]>
>>>> Sent: Monday, June 10, 2019 3:29 PM
>>>> To: Heaton, Tobias <[email protected]>
>>>> Cc: David Lang <[email protected]>; Heaton, Tobias via rsyslog 
>>>> <[email protected]>
>>>> Subject: RE: [rsyslog] 8.1905.0 Logging Stops
>>>> 
>>>> Caution - External Email;;;
>>>> 
>>>> ********************************************************************************************************************************************
>>>>> On Mon, 10 Jun 2019, Heaton, Tobias wrote:
>>>>> 
>>>>> I configured impstats, updated rsyslog, restarted and awaited the 
>>>>> failure. Tailing the busiest logs, behavior starts normal. Over the 
>>>>> course of a few minutes, the logs seems to arrive in chunks...or at least 
>>>>> appear to write that way to disk.
>>>>> 
>>>>> That behavior continues with logs populating incrementally slower and 
>>>>> slower until it just stops. The impstats don't show anything of 
>>>>> consequence - the repeated stats are all normal and the same both prior 
>>>>> to and after the logs stop writing.
>>>>> 
>>>>> Rsyslog appears still running and impstats continue to populate again 
>>>>> with no appreciable changes - very strange!
>>>> 
>>>> after it stops, does impstats show new messages arriving (and queues 
>>>> building)?
>>>> or does it show outputs failing and messages being discarded?
>>>> or something else?
>>>> 
>>>> a couple cycles of the pstats output after it's failed would be useful
>>>> 
>>>> David Lang
>>>> 
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