uwsgi 启动时就报错

一般能看到：--- no python application found, check your startup logs for errors ---，基本上是配置出错了，无法正常启动 uwsgi。

有用日志信息(每次启动 uwsgi 的时候就会有启动的日志产生，如果出错了就在这块找找)：

*** Operational MODE: preforking ***

failed to open python file /root/yzq/djangos/testdata/Testdata/wsgi.py

unable to load app 0 (mountpoint='') (callable not found or import error)

它说 /root/yzq/djangos/testdata/Testdata/wsgi.py 这个路径打开失败，我这里是路径写错了，少写了一级。

*** Operational MODE: preforking ***

failed to open python file /root/yzq/djangos/testdata/Testdata/wsgi.py

unable to load app 0 (mountpoint='') (callable not found or import error)

*** no app loaded. going in full dynamic mode ***

uWSGI running as root, you can use --uid/--gid/--chroot options

*** WARNING: you are running uWSGI as root !!! (use the --uid flag) ***

*** uWSGI is running in multiple interpreter mode ***

spawned uWSGI master process (pid: 25141)

spawned uWSGI worker 1 (pid: 25142, cores: 1)

spawned uWSGI worker 2 (pid: 25143, cores: 1)

*** Stats server enabled on 127.0.0.1:9193 fd: 11 ***

...brutally killing workers...

worker 1 buried after 1 seconds

worker 2 buried after 1 seconds

binary reloading uWSGI...

chdir() to /root/yzq/configs

closing all non-uwsgi socket fds > 2 (max_fd = 100001)...

found fd 3 mapped to socket 0 (127.0.0.1:9092)

running /root/.virtualenvs/blog/bin/uwsgi

[uWSGI] getting INI configuration from /root/yzq/configs/testdata_uwsgi.ini

*** Starting uWSGI 2.0.17 (64bit) on [Fri Feb 15 21:31:14 2019] ***

compiled with version: 4.8.5 20150623 (Red Hat 4.8.5-16) on 04 April 2018 04:11:16

os: Linux-3.10.0-514.26.2.el7.x86_64 #1 SMP Tue Jul 4 15:04:05 UTC 2017

nodename: VM_2_29_centos

machine: x86_64

clock source: unix

pcre jit disabled

detected number of CPU cores: 1

current working directory: /root/yzq/configs

detected binary path: /root/.virtualenvs/blog/bin/uwsgi

uWSGI running as root, you can use --uid/--gid/--chroot options

*** WARNING: you are running uWSGI as root !!! (use the --uid flag) ***

chdir() to /root/yzq/djangos/testdata

your processes number limit is 7283

your memory page size is 4096 bytes

detected max file descriptor number: 100001

lock engine: pthread robust mutexes

thunder lock: disabled (you can enable it with --thunder-lock)

uwsgi socket 0 inherited INET address 127.0.0.1:9092 fd 3

uWSGI running as root, you can use --uid/--gid/--chroot options

*** WARNING: you are running uWSGI as root !!! (use the --uid flag) ***

Python version: 3.6.4 (default, Mar 16 2018, 22:27:18) [GCC 4.8.5 20150623 (Red Hat 4.8.5-16)]

Set PythonHome to /root/.virtualenvs/testdata

*** Python threads support is disabled. You can enable it with --enable-threads ***

Python main interpreter initialized at 0x28f9820

uWSGI running as root, you can use --uid/--gid/--chroot options

*** WARNING: you are running uWSGI as root !!! (use the --uid flag) ***

your server socket listen backlog is limited to 100 connections

your mercy for graceful operations on workers is 60 seconds

mapped 304776 bytes (297 KB) for 2 cores

*** Operational MODE: preforking ***

failed to open python file /root/yzq/djangos/testdata/Testdata/wsgi.py

unable to load app 0 (mountpoint='') (callable not found or import error)

*** no app loaded. going in full dynamic mode ***

uWSGI running as root, you can use --uid/--gid/--chroot options

*** WARNING: you are running uWSGI as root !!! (use the --uid flag) ***

*** uWSGI is running in multiple interpreter mode ***

gracefully (RE)spawned uWSGI master process (pid: 25141)

spawned uWSGI worker 1 (pid: 27985, cores: 1)

spawned uWSGI worker 2 (pid: 27986, cores: 1)

*** Stats server enabled on 127.0.0.1:9193 fd: 11 ***

*** Starting uWSGI 2.0.17 (64bit) on [Fri Feb 15 21:32:11 2019] ***

compiled with version: 4.8.5 20150623 (Red Hat 4.8.5-16) on 04 April 2018 04:11:16

os: Linux-3.10.0-514.26.2.el7.x86_64 #1 SMP Tue Jul 4 15:04:05 UTC 2017

nodename: VM_2_29_centos

machine: x86_64

clock source: unix

pcre jit disabled

detected number of CPU cores: 1

current working directory: /

writing pidfile to /root/yzq/running/uwsgi_testdata.pid

detected binary path: /root/.virtualenvs/blog/bin/uwsgi

uWSGI running as root, you can use --uid/--gid/--chroot options

*** WARNING: you are running uWSGI as root !!! (use the --uid flag) ***

chdir() to /root/yzq/djangos/testdata

your processes number limit is 7283

your memory page size is 4096 bytes

detected max file descriptor number: 1000000

lock engine: pthread robust mutexes

thunder lock: disabled (you can enable it with --thunder-lock)

uwsgi socket 0 bound to TCP address 127.0.0.1:9092 fd 3

uWSGI running as root, you can use --uid/--gid/--chroot options

*** WARNING: you are running uWSGI as root !!! (use the --uid flag) ***

Python version: 3.6.4 (default, Mar 16 2018, 22:27:18) [GCC 4.8.5 20150623 (Red Hat 4.8.5-16)]

Set PythonHome to /root/.virtualenvs/testdata

*** Python threads support is disabled. You can enable it with --enable-threads ***

Python main interpreter initialized at 0x17141f0

uWSGI running as root, you can use --uid/--gid/--chroot options

*** WARNING: you are running uWSGI as root !!! (use the --uid flag) ***

your server socket listen backlog is limited to 100 connections

your mercy for graceful operations on workers is 60 seconds

mapped 304776 bytes (297 KB) for 2 cores

*** Operational MODE: preforking ***

failed to open python file /root/yzq/djangos/testdata/Testdata/wsgi.py

unable to load app 0 (mountpoint='') (callable not found or import error)

*** no app loaded. going in full dynamic mode ***

uWSGI running as root, you can use --uid/--gid/--chroot options

*** WARNING: you are running uWSGI as root !!! (use the --uid flag) ***

*** uWSGI is running in multiple interpreter mode ***

spawned uWSGI master process (pid: 527)

spawned uWSGI worker 1 (pid: 541, cores: 1)

spawned uWSGI worker 2 (pid: 542, cores: 1)

*** Stats server enabled on 127.0.0.1:9193 fd: 11 ***

--- no python application found, check your startup logs for errors ---

[pid: 541|app: -1|req: -1/1] 193.112.40.139 () {32 vars in 365 bytes} [Fri Feb 15 21:36:07 2019] GET / => generated 21 bytes i

n 0 msecs (HTTP/1.1 500) 2 headers in 83 bytes (0 switches on core 0)

--- no python application found, check your startup logs for errors ---

[pid: 541|app: -1|req: -1/2] 193.112.40.139 () {32 vars in 365 bytes} [Fri Feb 15 21:36:10 2019] GET / => generated 21 bytes i

n 0 msecs (HTTP/1.1 500) 2 headers in 83 bytes (0 switches on core 0)

uwsgi 正常启动，访问相关视图才报错

日志里明确的得到有用信息：

django.urls.exceptions.NoReverseMatch: Reverse for 'detail' with arguments '('',)' not found. 1 pattern(s) tried: ['article/(?

P[0-9]+)/$']

路由缺少参数，我这个问题是因为缓存没更新引起的。具体情况是，django 新模板代码 拿到旧的数据结构(因为是缓存数据-旧的数据结构，缓存时长 12H)去解析导致的，只需要进入缓存，把 key 删除就可以，或者换个新 key。

[pid: 11774|app: 0|req: 420/491] 111.206.221.40 () {44 vars in 1222 bytes} [Wed Dec 25 20:06:17 2019] GET /like_get/?cur_url=http%3A%2F%2Fzhuoqun.info%2Farticle%2F215%2F&article_id=215&csrfmiddlewaretoken=DcI4hLPyMtwaL5hutjx1s5KnfUTEWcWBudwwYYk9iyHu8iI2IQQ1Ez1saXXeY3WZ => generated 242 bytes in 44 msecs (HTTP/1.1 200) 3 headers in 101 bytes (1 switches on core 2)

[pid: 11775|app: 0|req: 72/492] 111.206.221.104 () {50 vars in 1101 bytes} [Wed Dec 25 20:06:17 2019] POST /visit_web/ => generated 1342 bytes in 25 msecs (HTTP/1.1 403) 3 headers in 102 bytes (1 switches on core 3)

django.security.csrf: 2019-12-25 20:06:17,771 /root/.virtualenvs/blog/lib/python3.6/site-packages/django/middleware/csrf.py [l

File "/root/.virtualenvs/blog/lib/python3.6/site-packages/django/template/base.py", line 990, in render

bit = node.render_annotated(context)

File "/root/.virtualenvs/blog/lib/python3.6/site-packages/django/template/base.py", line 957, in render_annotated

return self.render(context)

File "/root/.virtualenvs/blog/lib/python3.6/site-packages/django/template/loader_tags.py", line 72, in render

result = block.nodelist.render(context)

File "/root/.virtualenvs/blog/lib/python3.6/site-packages/django/template/base.py", line 990, in render

bit = node.render_annotated(context)

File "/root/.virtualenvs/blog/lib/python3.6/site-packages/django/template/base.py", line 957, in render_annotated

return self.render(context)

File "/root/.virtualenvs/blog/lib/python3.6/site-packages/django/template/loader_tags.py", line 72, in render

result = block.nodelist.render(context)

File "/root/.virtualenvs/blog/lib/python3.6/site-packages/django/template/base.py", line 990, in render

bit = node.render_annotated(context)

File "/root/.virtualenvs/blog/lib/python3.6/site-packages/django/template/base.py", line 957, in render_annotated

return self.render(context)

File "/root/.virtualenvs/blog/lib/python3.6/site-packages/django/template/library.py", line 245, in render

return t.render(new_context)

File "/root/.virtualenvs/blog/lib/python3.6/site-packages/django/template/base.py", line 209, in render

return self._render(context)

File "/root/.virtualenvs/blog/lib/python3.6/site-packages/django/template/base.py", line 199, in _render

return self.nodelist.render(context)

File "/root/.virtualenvs/blog/lib/python3.6/site-packages/django/template/base.py", line 990, in render

bit = node.render_annotated(context)

File "/root/.virtualenvs/blog/lib/python3.6/site-packages/django/template/base.py", line 957, in render_annotated

return self.render(context)

File "/root/.virtualenvs/blog/lib/python3.6/site-packages/django/template/defaulttags.py", line 216, in render

nodelist.append(node.render_annotated(context))

File "/root/.virtualenvs/blog/lib/python3.6/site-packages/django/template/base.py", line 957, in render_annotated

return self.render(context)

File "/root/.virtualenvs/blog/lib/python3.6/site-packages/django/template/defaulttags.py", line 322, in render

return nodelist.render(context)

File "/root/.virtualenvs/blog/lib/python3.6/site-packages/django/template/base.py", line 990, in render

bit = node.render_annotated(context)

File "/root/.virtualenvs/blog/lib/python3.6/site-packages/django/template/base.py", line 957, in render_annotated

return self.render(context)

File "/root/.virtualenvs/blog/lib/python3.6/site-packages/django/template/defaulttags.py", line 458, in render

url = reverse(view_name, args=args, kwargs=kwargs, current_app=current_app)

File "/root/.virtualenvs/blog/lib/python3.6/site-packages/django/urls/base.py", line 91, in reverse

return force_text(iri_to_uri(resolver._reverse_with_prefix(view, prefix, *args, **kwargs)))

File "/root/.virtualenvs/blog/lib/python3.6/site-packages/django/urls/resolvers.py", line 497, in _reverse_with_prefix

raise NoReverseMatch(msg)

django.urls.exceptions.NoReverseMatch: Reverse for 'detail' with arguments '('',)' not found. 1 pattern(s) tried: ['article/(?

P[0-9]+)/$']

[pid: 9439|app: 0|req: 19/23] 223.166.75.193 () {46 vars in 779 bytes} [Wed Dec 25 00:57:26 2019] GET / => generated 2073 byte

s in 624 msecs (HTTP/1.1 200) 5 headers in 278 bytes (1 switches on core 2)

[pid: 9439|app: 0|req: 20/24] 124.225.47.166 () {42 vars in 781 bytes} [Wed Dec 25 00:57:28 2019] GET /favicon.ico => generate

d 0 bytes in 11 msecs (HTTP/1.1 301) 4 headers in 160 bytes (1 switches on core 3)