TCP: too many orphaned sockets

Anyone else noticing “TCP: too many orphaned sockets” messages in /var/log/messages?

Aug 12 22:13:26 .... kernel: [516377.918822] TCP: too many orphaned sockets
Aug 12 22:13:26 .... kernel: [516377.918875] TCP: too many orphaned sockets
Aug 12 22:13:34 .... kernel: [516386.084536] net_ratelimit: 13308 callbacks suppressed
Aug 12 22:13:34 .... kernel: [516386.084551] TCP: too many orphaned sockets

They pretty much fill the entire syslog. I have not noticed any ill-effects due to this, but they don’t sound normal either.

$ cat /proc/sys/net/ipv4/tcp_mem 
11031	14710	22062
 $ free
          total        used        free      shared  buff/cache   available
Mem:         948300      344168      101368       47808      502764      492200
Swap:        102396        4212       98184