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Instance is flooded with Discovery Jobs (Discovery Status) - Multiple jobs per schedule. - Support and Troubleshooting
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  • Instance is flooded with Discovery Jobs (Discovery Status) - Multiple jobs per schedule.
KB0692054

Instance is flooded with Discovery Jobs (Discovery Status) - Multiple jobs per schedule.


557 Views Last updated : Jul 24, 2025 public Copy Permalink
KB Summary by Now Assist

Issue

Symptoms


Many Discovery jobs are suddenly created, multiple jobs per Discovery Schedule for some schedules flooding the scheduled job queue (sys_trigger table) and ECC Queue (ecc_queue) table.

Release


Verified on Istanbul, Jakarta, and Kingston.

Cause


- The instance has several 'Run After' discovery schedules with 'Even if canceled' checked. EX: Sched A -> Sched B -> Sched C -> Sched D -> Sched E -> Sched F
- These Schedules are configured to run on a MID Server Cluster. When 2 or more MID Servers in the cluster became 'Invalidated', multiple 'discovery.canceled' events are published, one for each MID Server. 
- For Example, if 2 MID servers are 'Invalidated', 2 'discovery.canceled' are published for Sched A when it's launched. These two events triggered 2 discovery jobs for Sched B and this schedule will be cancelled as will with 2 'discovery.canceled' published for each job for a total of 4 jobs. Subsequently, 4 discovery jobs are started for Sched C, 8 for sched D, 16 for Sched E, and 32 for Sched F. The # of jobs are multiplicative with more MID Servers 'Invalidated'

Resolution


Addressed in PRB1293504 which targets all releases from Jakarta and newer.

 


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