commit c82c38af8d2e99dc0267d4aad71c517f9fb0e70b
author Roman Arutyunyan <arut@nginx.com> Mon Dec 26 14:27:05 2016 +0300
committer Roman Arutyunyan <arut@nginx.com> Mon Dec 26 14:27:05 2016 +0300
tree c39911bf624cfe2c8e479dc14a340cf95ed7d8a2
parent 114f060fca5e73520dcc74c3779493dc211e4497

Stream: speed up TCP peer recovery.

Previously, an unavailable peer was considered recovered after a successful
proxy session to this peer.  Until then, only a single client connection per
fail_timeout was allowed to be proxied to the peer.

Since stream sessions can be long, it may take indefinite time for a peer to
recover, limiting the ability of the peer to receive new connections.

Now, a peer is considered recovered after a successful TCP connection is
established to it.  Balancers are notified of this event via the notify()
callback.