MongoDB 8 doesn’t deem to close old connections (each old connection stays at 100% CPU on one core)

[chris (Chris Dellaway)]

Try 8.0.5.

Possibly related to this:

Constantly high CPU usage after OS restart

We have used a mongo v8.0.1 replicaSet (2 nodes + arbiter) on our production servers (Rocky 9.4 with 12 cores) since some weeks. I restartet the whole system of primary after RAM upgrade some days ago. We have seen 100% cpu usage caused by mongo process on all cores since that. We have tested folllowing steps: mongo service restart look for slow queries (We also tried to stop all our services calling mongo, but cpu usage won’t change.) node reinitilized switch primary to another node disabl…