[OpenIndiana-discuss] Dead Horse Beating: zfs send doesn't await rem login

[hput]

Novice question about `send recv'
This commandline doesn't stop and wait for the login to complete or
even start on remote (oi)  host.

  # zfs send -v  p0/pub at 241122.200009-for-send-t0-oi |pv |ssh oi zfs recv -v p0/pub
   full send of p0/pub at 241122.200009-for-send-t0-oi estimated size is
   403M
  total estimated size is 403M
  (root at oi) Password: TIME        SENT   SNAPSHOT p0/pub at 241122.200009-for-send-t0-oi
  20:13:48    228K   p0/pub at 241122.200009-for-send-t0-oi
  20:13:49    228K   p0/pub at 241122.200009-for-send-t0-oi
  [...]
  
The pause at password prompt might be 1 second or a bit less.

It's been a long time since I did any send recv but I don't recall
ever running into this . . . is it incorrect cmdline?

It does the same thing if I remove the "pv"

A regular ssh login attempt waits as expected and there is no kind
of passwordless login stuff set up.

  ssh oi
  (root at oi) Password: