Hub is constantly crashing
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Hub is constantly crashing


Article ID: 274798


Updated On:


DX Unified Infrastructure Management (Nimsoft / UIM) CA Unified Infrastructure Management On-Premise (Nimsoft / UIM) CA Unified Infrastructure Management SaaS (Nimsoft / UIM)


The hub is constantly crashing. Hub is restarting every few minutes. It had been running fine for several weeks.

hub.log showed repeated entries of this message:

Decommissioning: Key length: 33 and file length: 134 

and heartbeat failures for multiple robots.



  • Release: DX UIM 20.4.x 23.4.x


  • niscache


niscache on the Secondary hub contained 122,000 files (only 17 MB) but for some reason was causing the hub to continuously restart.

Note that snmpcollector is installed on this secondary hub.

  1. Stopped robot
  2. Deleted niscache folder
  3. Started robot

Then the secondary hub robot was successfully listening on port 48000 and the hub stopped restarting.

Additional Information

niscache - what it is and what it does 

How to clear the niscache on an individual robot

Attached niscache_clean_2.1 to case which can be dragged and dropped to clean the niscache on any robot.

Attachments get_app