CA Spectrum AutoDiscovery job-queue could be managed by actions send to the TopologyWrkSpc model:
./update action=0x10601 mh=<TopologyWrkspc> == show AutoDiscovery queue (single threaded)
./update action=0x10602 mh=<TopologyWrkspc> == kill AutoDiscovery "current job"
Once an ADisc job is canceled (dropped) this will report message to the ./SS/VNM.OUT file - covering:
Clearing the pending rediscovery queue @<date> <time>
(sample: Clearing the pending rediscovery queue @2018/07/23 19:17:34 )
At SpectroSERVER level the ADisc job queue is reported by specific event: - thus any "new queue discovery action" will create event of type 0x25e0004 / 0x25e0006 -> "Auto-discovery mapping process can not run on model "XXXXX" of type "YYYYY" because another mapping process is currently running" (0004) - so it is queued(0006). Doing then action=0x10601 and you see/find increased ADisc queue.
By default the AutoDiscovery job-queue is worked single_threaded to ensure proper modeling.
hth