Re: Newbie Question

[Tom Liotta <qsrvbas@xxxxxxxxxxxx>]

Al Mac Wheel wrote:

> Error messages ought to go to MSGQs with most serious to QSYSMSGQ.

Just IMO and purely _personal_ opinion here, but QSYSMSG should be 
used for its documented purpose. IBM documents what goes into 
QSYSMSG and under what conditions it happens. Now, I'll grant that 
the messages documented for QSYSMSG tend to be "most serious"; but I 
would avoid sending anything there myself. A "most serious" 
application error, for example, might be inappropriate. (That might 
be totally unrelated to the above comment, but I wanted to make a 
distinction.)

QSYSMSG is an IBM object (and optional). As such, its operation and 
requirements are subject to change. IIRC & ICBW, it was possible in 
the distant past to gain a level of access to the QHST message queue 
as a message queue. But it was early on somehow changed to shield it 
from 'normal' access methods. (E.g., DSPMSG QHST fails.)

Non-IBM use opens the slim possibility of unintended locks at the 
wrong moments. Also, if a 'never-ending' monitor job doesn't get 
started or abends, then some other job that is sending non-standard 
messages might enter a bug-loop that fills and potentially wraps 
QSYSMSG, possibly causing loss of notification.

All that is just my opinion for general consideration... YMMV.

Tom Liotta