Failed creating handler

I'm on 2.1.11 tree f2030ce4053a42c14fe7 (alan commited a fix for a leak in rlm_detail) but I can't reliably reproduce this. It's a head banger. I have reset max_requests_per_server to 0 from 400 and now it says "Error (event.c:3002): Failed to insert event" or something like that. The cause seems to be the same: fr_event_insert failing and causing this message to appear with a "panic attack". The load is not dramatic, 100-200 pkt/sec with peak at night of 2-3k pkt/sec.