Mercurial > hg > nginx-quic
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Avoid sending "Connection: keep-alive" when shutting down.
When a worker process is shutting down, keepalive is not used: this is checked
before the ngx_http_set_keepalive() call in ngx_http_finalize_connection().
Yet the "Connection: keep-alive" header was still sent, even if we know that
the worker process is shutting down, potentially resulting in additional
requests being sent to the connection which is going to be closed anyway.
While clients are expected to be able to handle asynchronous close events
(see ticket #1022), it is certainly possible to send the "Connection: close"
header instead, informing the client that the connection is going to be closed
and potentially saving some unneeded work.
With this change, we additionally check for worker process shutdown just
before sending response headers, and disable keepalive accordingly.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Tue, 11 Jan 2022 02:23:49 +0300 |
parents | 0b5f12d5c531 |
children |
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# Copyright (C) Igor Sysoev # Copyright (C) Nginx, Inc. echo echo "Configuration summary" if [ $USE_THREADS = YES ]; then echo " + using threads" fi if [ $USE_PCRE = DISABLED ]; then echo " + PCRE library is disabled" else case $PCRE in YES) echo " + using system $PCRE_LIBRARY library" ;; NONE) echo " + PCRE library is not used" ;; *) echo " + using $PCRE_LIBRARY library: $PCRE" ;; esac fi case $OPENSSL in YES) echo " + using system OpenSSL library" ;; NONE) echo " + OpenSSL library is not used" ;; *) echo " + using OpenSSL library: $OPENSSL" ;; esac case $ZLIB in YES) echo " + using system zlib library" ;; NONE) echo " + zlib library is not used" ;; *) echo " + using zlib library: $ZLIB" ;; esac case $NGX_LIBATOMIC in YES) echo " + using system libatomic_ops library" ;; NO) ;; # not used *) echo " + using libatomic_ops library: $NGX_LIBATOMIC" ;; esac echo cat << END nginx path prefix: "$NGX_PREFIX" nginx binary file: "$NGX_SBIN_PATH" nginx modules path: "$NGX_MODULES_PATH" nginx configuration prefix: "$NGX_CONF_PREFIX" nginx configuration file: "$NGX_CONF_PATH" nginx pid file: "$NGX_PID_PATH" END if test -n "$NGX_ERROR_LOG_PATH"; then echo " nginx error log file: \"$NGX_ERROR_LOG_PATH\"" else echo " nginx logs errors to stderr" fi cat << END nginx http access log file: "$NGX_HTTP_LOG_PATH" nginx http client request body temporary files: "$NGX_HTTP_CLIENT_TEMP_PATH" END if [ $HTTP_PROXY = YES ]; then echo " nginx http proxy temporary files: \"$NGX_HTTP_PROXY_TEMP_PATH\"" fi if [ $HTTP_FASTCGI = YES ]; then echo " nginx http fastcgi temporary files: \"$NGX_HTTP_FASTCGI_TEMP_PATH\"" fi if [ $HTTP_UWSGI = YES ]; then echo " nginx http uwsgi temporary files: \"$NGX_HTTP_UWSGI_TEMP_PATH\"" fi if [ $HTTP_SCGI = YES ]; then echo " nginx http scgi temporary files: \"$NGX_HTTP_SCGI_TEMP_PATH\"" fi echo "$NGX_POST_CONF_MSG"