tree d52fd9885ae461bca64cc3f51452e76d6ad6f77f
parent 6dec7b4df8824756407d5b3f37b11e5694075124
author Maxim Dounin <mdounin@mdounin.ru> 1613069529 +0300
committer Maxim Dounin <mdounin@mdounin.ru> 1613069529 +0300

Reuse of connections in lingering close.

This is particularly important in HTTP/2, where keepalive connections
are closed with lingering.  Before the patch, reusing a keepalive HTTP/2
connection resulted in the connection waiting for lingering close to
remain in the reusable connections queue, preventing ngx_drain_connections()
from closing additional connections.

The patch fixes it by marking the connection reusable again, and so
moving it in the reusable connections queue.  Further, it makes actually
possible to reuse such connections if needed.