AttributeError: 'ThreadedDict' object has no attribute 'app_stack' #268

singpenguin · 2013-11-27T10:54:04Z

Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/web.py-0.37-py2.7.egg/web/application.py", line 237, in process
return p(lambda: process(processors))
File "/usr/local/lib/python2.7/dist-packages/web.py-0.37-py2.7.egg/web/application.py", line 591, in processor
h()
File "/usr/local/lib/python2.7/dist-packages/web.py-0.37-py2.7.egg/web/application.py", line 98, in _unload
web.ctx.app_stack = web.ctx.app_stack[:-1]
AttributeError: 'ThreadedDict' object has no attribute 'app_stack'

Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/web.py-0.37-py2.7.egg/web/application.py", line 237, in process
return p(lambda: process(processors))
File "/usr/local/lib/python2.7/dist-packages/web.py-0.37-py2.7.egg/web/application.py", line 566, in processor
return handler()
File "/usr/local/lib/python2.7/dist-packages/web.py-0.37-py2.7.egg/web/application.py", line 237, in
return p(lambda: process(processors))
File "/usr/local/lib/python2.7/dist-packages/web.py-0.37-py2.7.egg/web/application.py", line 246, in process
raise self.internalerror()
File "/usr/local/lib/python2.7/dist-packages/web.py-0.37-py2.7.egg/web/application.py", line 473, in internalerror
parent = self.get_parent_app()
File "/usr/local/lib/python2.7/dist-packages/web.py-0.37-py2.7.egg/web/application.py", line 458, in get_parent_app
if self in web.ctx.app_stack:
AttributeError: 'ThreadedDict' object has no attribute 'app_stack'

Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/gevent-1.0-py2.7-linux-x86_64.egg/gevent/pywsgi.py", line 508, in handle_one_response
self.run_application()
File "/usr/local/lib/python2.7/dist-packages/gevent-1.0-py2.7-linux-x86_64.egg/gevent/pywsgi.py", line 494, in run_application
self.result = self.application(self.environ, self.start_response)
File "/usr/local/lib/python2.7/dist-packages/web.py-0.37-py2.7.egg/web/application.py", line 279, in wsgi
result = self.handle_with_processors()
File "/usr/local/lib/python2.7/dist-packages/web.py-0.37-py2.7.egg/web/application.py", line 249, in handle_with_processors
return process(self.processors)
File "/usr/local/lib/python2.7/dist-packages/web.py-0.37-py2.7.egg/web/application.py", line 246, in process
raise self.internalerror()
File "/usr/local/lib/python2.7/dist-packages/web.py-0.37-py2.7.egg/web/application.py", line 473, in internalerror
parent = self.get_parent_app()
File "/usr/local/lib/python2.7/dist-packages/web.py-0.37-py2.7.egg/web/application.py", line 458, in get_parent_app
if self in web.ctx.app_stack:
AttributeError: 'ThreadedDict' object has no attribute 'app_stack'
{'CONTENT_LENGTH': '0',
'CONTENT_TYPE': 'application/x-www-form-urlencoded',
'GATEWAY_INTERFACE': 'CGI/1.1',
'HTTP_CACHE_CONTROL': 'no-cache',
'HTTP_CONNECTION': 'close',
'HTTP_COOKIE': '',
'HTTP_HOST': 'test.com',
'HTTP_USER_AGENT': 'Internet',
'HTTP_X_FORWARDED_FOR': '...',
'HTTP_X_REAL_IP': '...',
'PATH_INFO': '/test',
'QUERY_STRING': '',
'REMOTE_ADDR': '127.0.0.1',
'REMOTE_PORT': '58279',
'REQUEST_METHOD': 'POST',
'SCRIPT_NAME': '',
'SERVER_NAME': 'localhost',
'SERVER_PORT': '8058',
'SERVER_PROTOCOL': 'HTTP/1.1',
'SERVER_SOFTWARE': 'gevent/1.0 Python/2.7',
'wsgi.errors': <open file '', mode 'w' at 0x7ff36ea49270>,
'wsgi.input': <gevent.pywsgi.Input object at 0x2b83250>,
'wsgi.multiprocess': False,
'wsgi.multithread': False,
'wsgi.run_once': False,
'wsgi.url_scheme': 'http',
'wsgi.version': (1, 0)} failed with AttributeError

web server is gevent(1.0), The "/test" interface has been reported that the call was wrong

IllegalWalker · 2014-12-29T05:59:09Z

I had the same problem
I found the reason for my problem is that : I created multiple webpy application instance for each worker server process, when I change the code to create one application for all server worker process, this bug gone

Ravil-Safin · 2015-12-23T09:32:28Z

I have the same issue with web.py 0.37 version. I've got my code from an example:

import web
urls = ('/hello', 'hello')
app = web.application(urls, globals())

class hello:
    def GET(self):
        web.header('Content-Type', 'text/plain')
        return "Hello world!"

response = app.request("/hello")
print(response.data)

And getting error:

C:\Python27\python.exe D:/tmp/test_web/server.py
Traceback (most recent call last):
  File "C:\Python27\lib\site-packages\web\application.py", line 239, in process
    return self.handle()
  File "C:\Python27\lib\site-packages\web\application.py", line 229, in handle
    fn, args = self._match(self.mapping, web.ctx.path)
AttributeError: 'ThreadedDict' object has no attribute 'path'

Traceback (most recent call last):
  File "C:\Python27\lib\site-packages\web\application.py", line 237, in process
    return p(lambda: process(processors))
  File "C:\Python27\lib\site-packages\web\application.py", line 566, in processor
    return handler()
  File "C:\Python27\lib\site-packages\web\application.py", line 237, in <lambda>
    return p(lambda: process(processors))
  File "C:\Python27\lib\site-packages\web\application.py", line 246, in process
    raise self.internalerror()
  File "C:\Python27\lib\site-packages\web\application.py", line 473, in internalerror
    parent = self.get_parent_app()
  File "C:\Python27\lib\site-packages\web\application.py", line 458, in get_parent_app
    if self in web.ctx.app_stack:
AttributeError: 'ThreadedDict' object has no attribute 'app_stack'

Traceback (most recent call last):
  File "C:\Python27\lib\site-packages\web\application.py", line 237, in process
    return p(lambda: process(processors))
  File "C:\Python27\lib\site-packages\web\application.py", line 566, in processor
    return handler()
  File "C:\Python27\lib\site-packages\web\application.py", line 237, in <lambda>
    return p(lambda: process(processors))
  File "C:\Python27\lib\site-packages\web\application.py", line 246, in process
    raise self.internalerror()
  File "C:\Python27\lib\site-packages\web\application.py", line 473, in internalerror
    parent = self.get_parent_app()
  File "C:\Python27\lib\site-packages\web\application.py", line 458, in get_parent_app
    if self in web.ctx.app_stack:
AttributeError: 'ThreadedDict' object has no attribute 'app_stack'

Traceback (most recent call last):
  File "C:\Python27\lib\site-packages\web\application.py", line 237, in process
    return p(lambda: process(processors))
  File "C:\Python27\lib\site-packages\web\application.py", line 585, in processor
    h()
  File "C:\Python27\lib\site-packages\web\application.py", line 98, in _unload
    web.ctx.app_stack = web.ctx.app_stack[:-1]
AttributeError: 'ThreadedDict' object has no attribute 'app_stack'

Traceback (most recent call last):
  File "C:\Python27\lib\site-packages\web\application.py", line 237, in process
    return p(lambda: process(processors))
  File "C:\Python27\lib\site-packages\web\application.py", line 566, in processor
    return handler()
  File "C:\Python27\lib\site-packages\web\application.py", line 237, in <lambda>
    return p(lambda: process(processors))
  File "C:\Python27\lib\site-packages\web\application.py", line 246, in process
    raise self.internalerror()
  File "C:\Python27\lib\site-packages\web\application.py", line 473, in internalerror
    parent = self.get_parent_app()
  File "C:\Python27\lib\site-packages\web\application.py", line 458, in get_parent_app
    if self in web.ctx.app_stack:
AttributeError: 'ThreadedDict' object has no attribute 'app_stack'

Traceback (most recent call last):
  File "D:/tmp/test_web/server.py", line 11, in <module>
    response = app.request("/hello")
  File "C:\Python27\lib\site-packages\web\application.py", line 221, in request
    response.data = "".join(self.wsgifunc()(env, start_response))
  File "C:\Python27\lib\site-packages\web\application.py", line 279, in wsgi
    result = self.handle_with_processors()
  File "C:\Python27\lib\site-packages\web\application.py", line 249, in handle_with_processors
    return process(self.processors)
  File "C:\Python27\lib\site-packages\web\application.py", line 246, in process
    raise self.internalerror()
  File "C:\Python27\lib\site-packages\web\application.py", line 473, in internalerror
Hello world!
    parent = self.get_parent_app()
  File "C:\Python27\lib\site-packages\web\application.py", line 458, in get_parent_app
    if self in web.ctx.app_stack:
AttributeError: 'ThreadedDict' object has no attribute 'app_stack'

Process finished with exit code 1

stanislavkozlovski · 2016-10-31T09:44:46Z

Anybody found a solution?

singpenguin · 2016-10-31T15:06:25Z

This question is hard. I also met when 2013 year.
My project was tight, so I replaced web.py with tornado.
But i still like web.py very much.

dinodouglasr · 2016-11-11T18:23:56Z

Use requests library instead app.request.

import requests
req = requests.get("http´://127.0.0.1:8058/test")
req.text

hatcherfang · 2017-09-20T06:49:45Z

@dinodouglasr we can't limit the client request method.
Is there anyone found the solution?

hatcherfang · 2018-01-04T09:07:39Z

@Ravil-Safin Did you find the solution finally?

hatcherfang · 2018-01-15T03:15:56Z

I found a solution (https://www.itcao.com/post_1182.html) mark it

magicknight · 2018-06-02T16:32:37Z

I encountered this problem. anyone has any suggestions?

magicknight · 2018-06-07T07:41:54Z

well, seems to be a gevent bug.

put these line before everything

from gevent import monkey
monkey.patch_all()

works for me

iredmail · 2019-09-14T01:09:00Z

@cclauss could you help check this issue? I can reproduce it with py2 and py3 with the sample code given by @Ravil-Safin #268 (comment)

cclauss · 2019-09-14T04:30:39Z

Can you please create a PR that contains the failing test so that we all have a common playground for trying out solutions?

iredmail · 2019-09-14T04:37:12Z

@cclauss Use this code snippet:

import web
urls = ('/hello', 'hello')
app = web.application(urls, globals())

class hello:
    def GET(self):
        web.header('Content-Type', 'text/plain')
        return "Hello world!"

response = app.request("/hello")
print(response.data)

cclauss · 2019-09-14T04:44:57Z

We should try out this style of solution...
aaronsw@348f1f4#diff-52ed61391b0139abeacbed53a6bd0eb0R50
Looks for 'app_stack' and if it is not found then do nothing.

iredmail · 2019-09-14T04:47:49Z

Did you reply to wrong issue or it's relevant?
The solution in the link is much clearer than existing implementation. I agree to go with this change.

cclauss · 2019-09-14T04:51:26Z

Replying to the correct issue with a solution discussed in another issue.

iredmail · 2019-09-14T04:52:39Z

Could you help create a PR for this change?

iredmail · 2019-09-14T14:20:13Z

@cclauss if you're working on this issue, don't forget to check (and maybe fix) #246 also, it's relevant.

AndreLouisCaron · 2020-07-03T12:40:26Z

@iredmail In that example you posted above, isn't the issue created because the sample code uses import-time side-effect to invoke the app (which triggers a nested request)?

If you change the code to this (to avoid web.py importing 'index' from globals()), it works:

import web

class hello:
    def GET(self):
        web.header('Content-Type', 'text/plain')
        return "Hello world!"

urls = ('/hello', hello)
app = web.application(urls, {})

response = app.request("/hello")

AndreLouisCaron · 2020-07-03T13:13:11Z

I'm confident this issue arises in presence of concurrency. The web.application._cleanup() function calls web.ThreadedDict.clear_all(), which clears web.ctx in all threads. This is called at the end of .wsgifunc(). If any 2 requests execute concurrently, the first to finish will clear web.ctx for the other. (EDIT: nevermind, this is not related.)

There is a related issue with web.ctx, such as incorrect handling of nested context. If you have multiple "micro services" running in the same process (e.g. for simplicity of development), you will also run into the AttributeError: 'ThreadedDict' object has no attribute 'app_stack' error.

# -*- coding: utf-8 -*-


from __future__ import print_function

import web


class inner:
    def GET(self):
        web.header("Content-Type", "text/plain")
        return "This is the `inner` app!"


inner_app = web.application(("/", inner), {})


class outer:
    def GET(self):
        web.header("Content-Type", "text/plain")
        inner_app.request("/")
        return "This is the `outer` app!"


outer_app = web.application(("/", outer), {})


print("RESPONSE:", outer_app.request("/").data)

iredmail added this to the 0.40 + Python-3 milestone Sep 16, 2019

iredmail assigned cclauss Sep 16, 2019

iredmail added the Bug label Sep 16, 2019

iredmail removed this from the 0.40 + Python-3 milestone Sep 16, 2019

AndreLouisCaron mentioned this issue Jul 3, 2020

WIP: Implement safe context nesting #651

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AttributeError: 'ThreadedDict' object has no attribute 'app_stack' #268

AttributeError: 'ThreadedDict' object has no attribute 'app_stack' #268

singpenguin commented Nov 27, 2013

IllegalWalker commented Dec 29, 2014

Ravil-Safin commented Dec 23, 2015

stanislavkozlovski commented Oct 31, 2016

singpenguin commented Oct 31, 2016

dinodouglasr commented Nov 11, 2016 •

edited

hatcherfang commented Sep 20, 2017

hatcherfang commented Jan 4, 2018 •

edited

hatcherfang commented Jan 15, 2018

magicknight commented Jun 2, 2018

magicknight commented Jun 7, 2018 •

edited

iredmail commented Sep 14, 2019

cclauss commented Sep 14, 2019

iredmail commented Sep 14, 2019

cclauss commented Sep 14, 2019 •

edited

iredmail commented Sep 14, 2019

cclauss commented Sep 14, 2019

iredmail commented Sep 14, 2019

iredmail commented Sep 14, 2019

AndreLouisCaron commented Jul 3, 2020

AndreLouisCaron commented Jul 3, 2020 •

edited

AttributeError: 'ThreadedDict' object has no attribute 'app_stack' #268

AttributeError: 'ThreadedDict' object has no attribute 'app_stack' #268

Comments

singpenguin commented Nov 27, 2013

IllegalWalker commented Dec 29, 2014

Ravil-Safin commented Dec 23, 2015

stanislavkozlovski commented Oct 31, 2016

singpenguin commented Oct 31, 2016

dinodouglasr commented Nov 11, 2016 • edited

hatcherfang commented Sep 20, 2017

hatcherfang commented Jan 4, 2018 • edited

hatcherfang commented Jan 15, 2018

magicknight commented Jun 2, 2018

magicknight commented Jun 7, 2018 • edited

iredmail commented Sep 14, 2019

cclauss commented Sep 14, 2019

iredmail commented Sep 14, 2019

cclauss commented Sep 14, 2019 • edited

iredmail commented Sep 14, 2019

cclauss commented Sep 14, 2019

iredmail commented Sep 14, 2019

iredmail commented Sep 14, 2019

AndreLouisCaron commented Jul 3, 2020

AndreLouisCaron commented Jul 3, 2020 • edited

dinodouglasr commented Nov 11, 2016 •

edited

hatcherfang commented Jan 4, 2018 •

edited

magicknight commented Jun 7, 2018 •

edited

cclauss commented Sep 14, 2019 •

edited

AndreLouisCaron commented Jul 3, 2020 •

edited