Hi, I've compiled latest haproxy 1.8.12 from Git repo (HAProxy version 1.8.12-5e100b-15, released 2018/07/20) with latest h2 patches and extended h2 debug info. And after some time I caught one CLOSE_WAIT connection. Here is extended show fd debug: 25 : st=0x20(R:pra W:pRa) ev=0x00(heopi) [nlc] cache=0 owner=0x24f0a70 iocb=0x4d34c0(conn_fd_handler) tmask=0x1 umask=0x0 cflg=0x80203300 fe=fe-http mux=H2 mux_ctx=0x258a880 st0=7 flg=0x00001000 nbst=8 nbcs=0 fctl_cnt=0 send_cnt=8 tree_cnt=8 orph_cnt=8 dbuf=0/0 mbuf=0/16384
LSOF CLOSE_WAIT haproxy 26364 haproxy 25u IPv4 7140390 0t0 TCP ip:https->ip:50041 (CLOSE_WAIT) Milan