Symptom
The following symptoms have been observed when this issue is encountered:
1. High CPU utilization in the 'show cpu' output despite 'show cpu core' showing a low amount of utilization
2. Stack memory allocation errors in the console
3. Inability to SSH to the device
4. SNMP polling fails
Conditions
1. This seems to occur even when under relatively low traffic load after period of uptime (3-4 weeks but still under investigation)
2. Issue has been seen after upgrading ASAv from 9.14(2)4 to 9.14(3)18 and has also been hit on 9.16(3)15
Workaround
Rebooting the device resolves the issue temporarily.
Further Problem Description
The following memory allocation errors are printed to the console:
Message #9 :
ERROR: FAIL to ALLOC the stack page 0xffffffffffffffff[size 36864] to 0x00007fa3b0c29000 errno (mmap:umap) 12:0Message #10 :
First MMAP Req/Updated 36864/45056 Front 0x00007fa3b0c28000 rtn 0x00007fa3b0c29000 back 0x00007fa3b0c32000
Message #11 : process_create: out of stack memory for name accept/ssh_2 size 32768 prio 3
Message #12 : _listen_ssh: failed to create thread for interface 2 port 22
Message #13 : NetSnmp_write_conf:ERROR Message #14 : Failed io_write to (-448063200)
