uWSGI错误hr_instance_read():由对等方重置连接

Question

我使用uWSGI和NGINX作为反向代理部署了一个烧瓶Web应用程序.应用程序响应时间平均约为9毫秒,但在一批请求后,我的工作程序崩溃,并且我在uWSGI日志中记录了这个日志:

[uwsgi-http key: backend client_addr: 172.17.0.1 client_port: 24488] hr_instance_read(): Connection reset by peer [plugins/http/http.c line 647]
[uwsgi-http key: backend client_addr: 172.17.0.1 client_port: 4059] hr_instance_read(): Connection reset by peer [plugins/http/http.c line 647]
[uwsgi-http key: backend client_addr: 172.17.0.1 client_port: 46764] hr_instance_read(): Connection reset by peer [plugins/http/http.c line 647]
[uwsgi-http key: backend client_addr: 172.17.0.1 client_port: 9951] hr_instance_read(): Connection reset by peer [plugins/http/http.c line 647]
[uwsgi-http key: backend client_addr: 172.17.0.1 client_port: 9449] hr_instance_read(): Connection reset by peer [plugins/http/http.c line 647]
[uwsgi-http key: backend client_addr: 172.17.0.1 client_port: 51355] hr_instance_read(): Connection reset by peer [plugins/http/http.c line 647]
[uwsgi-http key: backend client_addr: 172.17.0.1 client_port: 39565] hr_instance_read(): Connection reset by peer [plugins/http/http.c line 647]
[uwsgi-http key: backend client_addr: 172.17.0.1 client_port: 63142] hr_instance_read(): Connection reset by peer [plugins/http/http.c line 647]
[uwsgi-http key: backend client_addr: 172.17.0.1 client_port: 7861] hr_instance_read(): Connection reset by peer [plugins/http/http.c line 647]
[uwsgi-http key: backend client_addr: 172.17.0.1 client_port: 10165] hr_instance_read(): Connection reset by peer [plugins/http/http.c line 647]
[uwsgi-http key: backend client_addr: 172.17.0.1 client_port: 10917] hr_instance_read(): Connection reset by peer [plugins/http/http.c line 647]
[uwsgi-http key: backend client_addr: 172.17.0.1 client_port: 20392] hr_instance_read(): Connection reset by peer [plugins/http/http.c line 647]

uWSGI配置:

[uwsgi]
http = 0.0.0.0:7000
wsgi-file = app.py
callable = app
processes = 5
lazy = true
lazy-apps = true
buffer-size = 16384
logto = /root/logs/data-gathering.log

ENV:

uWSGI==2.0.17
Flask==0.12.2

Answer 1

我对 uWSGI 原生 HTTP 服务器也有同样的问题。具有以下配置：

https = :8443,app.crt,app.key,HIGH,!ca.crt
http-workers = 2
http-buffer-size = 32768

; applications
mount = /=/app.py
mount = /asq=/asq.py

; process managment
master = true
vacuum = true
single-interpreter = true
pidfile = /tmp/uwsgi.pid
enable-threads = true
cpu-affinity = 1
processes = 4
threads = 2
offload-threads = 1

close-on-exec = true
buffer-size = 32768

我总是得到：

[uwsgi-http key: 192.168.1.200:8443 client_addr: 192.168.1.200 client_port: 20179] hr_instance_read(): Connection reset by peer [plugins/http/http.c line 647]

就我而言，我正在执行POST请求，而不是消耗正文。因此，添加post-buffering = 1到配置后，一切都开始正常工作。没有标志并且仅读取POST数据的结果相同。

来自 uWSGI 的“要知道的事情”：

如果 HTTP 请求有正文（如表单生成的 POST 请求），则必须在应用程序中读取（使用）它。如果您不这样做，与您的网络服务器的通信套接字可能会被破坏。如果您很懒，您可以使用后缓冲选项，它会自动为您读取数据。对于机架应用程序，这是自动启用的。