We are running a cluster of SRX-345's with firmware 15.1X49-D170.4. Every now and then I see this message in the logs:
Local4.Critical 192.168.0.254 Dec 18 09:36:01 SRX345-CL-N0 Warning: jbuf pool id 1 utilization level(99%) is above 90%!
Has anyone an idea how serious this is?
I expect you are hitting something similar to this PR: https://prsearch.juniper.net/InfoCenter/index?page=prcontent&id=PR1467351
If you need further confirmation you will need to raise a JTAC ticket.