Flask WSGI应用程序在导入nltk时挂起

更新时间：2022-10-15 08:04:58

 < Directory / home / bitnami / public_html / HTTP / flasktest1&GT; 
 WSGIProcessGroup flaskapp 
 WSGIApplicationGroup％{GLOBAL} 
命令拒绝，允许
允许所有的
< / Directory>

应该是：

 < Directory / home / bitnami / public_html / http> 
 WSGIProcessGroup flaskapp 
 WSGIApplicationGroup％{GLOBAL} 
命令拒绝，允许
允许所有的
< / Directory>

因为您既不在守护进程模式下运行您的应用程序，也不在主解释器中运行您的应用程序，

那么Directory指令与上面的同一个目录的指令冲突，所以合并它们。

如果使用mod_wsgi 3.0或更高版本，而不是计数，也许删除第二个目录块，并使用：

$ $ p $ $ $ $ $ c $ WSGIDaemonProcess flaskapp threads = 5
WSGIScriptAlias / flasktest1 /home/bitnami/public_html/wsgi/flasktest1.wsgi process-group = flaskapp application-group =％{GLOBAL}

请注意，processes = 1已被删除，因为这是默认设置，它意味着您可能不想要的其他内容。您也不需要设置用户/组，因为它将自动以Apache用户身份运行。

I followed the instructions here to create a onefile flask-app deployed to apache2 with mod-wsgi on ubuntu. That all works fine when using the original flask app. However, when adding import nltk to the flask app apache hangs (no 500).

I use python 2.7 and nltk 2.0.4

Others seem to have had similar problems with other packages. Setting

WSGIApplicationGroup %{GLOBAL}

in the VirtualHost configuration seemed to have helped. However, I still get the same behavior. Did anybody run into the same issue? Thanks for the help!

Here is the VirtualHost Configuration file:

<VirtualHost *:8080>

    # ---- Configure VirtualHost Defaults ----

    ServerAdmin jsmith@whoi.edu 

    DocumentRoot /home/bitnami/public_html/http

    <Directory />
            Options FollowSymLinks
            AllowOverride None
    </Directory>

    <Directory /home/bitnami/public_html/http/>
            Options Indexes FollowSymLinks MultiViews
            AllowOverride None
            Order allow,deny
            Allow from all
    </Directory>

    # ---- Configure WSGI Listener(s) ----

    WSGIDaemonProcess flaskapp user=www-data group=www-data processes=1 threads=5
    WSGIScriptAlias /flasktest1 /home/bitnami/public_html/wsgi/flasktest1.wsgi 

    <Directory /home/bitnami/public_html/http/flasktest1>
            WSGIProcessGroup flaskapp
            WSGIApplicationGroup %{GLOBAL}
            Order deny,allow
            Allow from all
    </Directory>

    # ---- Configure Logging ----

ErrorLog /home/bitnami/public_html/logs/error.log
LogLevel warn
CustomLog /home/bitnami/public_html/logs/access.log combined

Here is the modified flask code

#!/usr/bin/python
from flask import Flask

import nltk
app = Flask(__name__)
@app.route('/')
def home():
    return """<html>
    <h2>Hello from Test Application 1</h2>
    </html>"""

@app.route('/<foo>')
def foo(foo):
    return """<html>
    <h2>Test Application 1</2>
    <h3>/%s</h3>
    </html>""" % foo

if __name__ == '__main__':
    "Are we in the __main__ scope? Start test server."
    app.run(host='0.0.0.0',port=5000,debug=True)

Where you have:

<Directory /home/bitnami/public_html/http/flasktest1>
        WSGIProcessGroup flaskapp
        WSGIApplicationGroup %{GLOBAL}
        Order deny,allow
        Allow from all
</Directory>

it should be:

<Directory /home/bitnami/public_html/http>
        WSGIProcessGroup flaskapp
        WSGIApplicationGroup %{GLOBAL}
        Order deny,allow
        Allow from all
</Directory>

as you are neither running your app in daemon mode or in the main interpreter because of the directives being in the wrong context.

That Directory directive then conflicts with one for same directory above so merge them.

If using mod_wsgi 3.0 or later count instead perhaps drop that second Directory block and use:

WSGIDaemonProcess flaskapp threads=5
WSGIScriptAlias /flasktest1 /home/bitnami/public_html/wsgi/flasktest1.wsgi process-group=flaskapp application-group=%{GLOBAL}

Note that processes=1 has been dropped as that is the default and setting it implies other things you likely don't want. You also don't need to set user/group as it will automatically run as the Apache user anyway.

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Flask WSGI应用程序在导入nltk时挂起

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