I feel like I saw this once with large communities, but memory is a bit fuzzy. 

On Fri, Feb 7, 2020 at 15:12 Randy Bush <randy@psg.com> wrote:
Feb  7 05:30:12 rpd[1752]: Prefix Send failed ! 103.148.40.0/24 bgp_rt_trace_too_big_message:1209 path attribute too big. Cannot build update.

anyone else seen this one?  another kiddie?

randy