Maxim Dounin mdounin at
Tue Mar 29 15:32:25 UTC 2016

Changes with nginx 1.9.13                                        29 Mar 2016

    *) Change: non-idempotent requests (POST, LOCK, PATCH) are no longer
       passed to the next server by default if a request has been sent to a
       backend; the "non_idempotent" parameter of the "proxy_next_upstream"
       directive explicitly allows retrying such requests.

    *) Feature: the ngx_http_perl_module can be built dynamically.

    *) Feature: UDP support in the stream module.

    *) Feature: the "aio_write" directive.

    *) Feature: now cache manager monitors number of elements in caches and
       tries to avoid cache keys zone overflows.

    *) Bugfix: "task already active" and "second aio post" alerts might
       appear in logs when using the "sendfile" and "aio" directives with

    *) Bugfix: "zero size buf in output" alerts might appear in logs if
       caching was used and a client closed a connection prematurely.

    *) Bugfix: connections with clients might be closed needlessly if
       caching was used.
       Thanks to Justin Li.

    *) Bugfix: nginx might hog CPU if the "sendfile" directive was used on
       Linux or Solaris and a file being sent was changed during sending.

    *) Bugfix: connections might hang when using the "sendfile" and "aio
       threads" directives.

    *) Bugfix: in the "proxy_pass", "fastcgi_pass", "scgi_pass", and
       "uwsgi_pass" directives when using variables.
       Thanks to Piotr Sikora.

    *) Bugfix: in the ngx_http_sub_filter_module.

    *) Bugfix: if an error occurred in a cached backend connection, the
       request was passed to the next server regardless of the
       proxy_next_upstream directive.

    *) Bugfix: "CreateFile() failed" errors when creating temporary files on

Maxim Dounin

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