error Couldn't calc cores number [error 'open /proc/stat: too many open files']

[jboyd98]

Recently had some performance problems reported from my xsoar users.

Found a tenant crashing.  Upon investigating I found the following error in the logs:

App03 host:

error Couldn't calc cores number [error 'open /proc/stat: too many open files']error Couldn't calc cores number [error 'open /proc/stat: too many open files'] 

I set this on APP03 last night as a temporary band-aid until I could better understand:
https://docs.paloaltonetworks.com/cortex/cortex-xsoar/6-2/cortex-xsoar-multi-tenant-guide/manage-con...

Review other host nodes that I didn't touch I see the following:

ulimit -a for root shows:

open files                      (-n) 1024

DockerHardeningCheck shows:

Additionally:

This key does NOT exist under  Advanced /Troubleshooting:

Where is it pulling 1048576 from; where would this be set and whats the difference between that and my ulimit -a for root (there is no special config in /etc/security/limits.conf)

Any feedback is appreciated,

Boyd

[amore]

Hi @jboyd98 , is this still an issue for you? Please open a support case with logs and screenshots.