從mod_wsgi句柄運行瓶子應用程序導致在調用Python對象時超出最大遞歸深度

Question

我從瓶子應用程序中收到一個奇怪的「RuntimeError：調用Python對象時超出最大遞歸深度」。同時從wsgi句柄（在virtualenv中）運行它在openshift paas服務。

回溯沒有提供我一個不好的事

我應該還提到，在我的開發MACHING（如蟒蛇pythonapp.py）運行腳本瓶直不正常工作的線索。

編輯：爲了驗證這個問題是連接到與mod_wsgi運行瓶我安裝它在我的開發計算機。運行直蟒作品。與mod_wsgi的運行讓我編輯的這個陌生的RuntimeError 末

我的問題#201 看到，這個問題已經「解決」，但可能用於其他用途的情況下

我用一瓶0.10.9上蟒蛇2.6 Linux服務器

Critical error while processing request: /about 
Error: RuntimeError('maximum recursion depth exceeded while calling a Python object',) 
Traceback: 
Traceback (most recent call last): 
File "path/to/app/virtenv/lib/python2.6/site-packages/bottle-0.10.9-py2.6.egg/bottle.py", 
line 824, in wsgi 
    out = self._cast(self._handle(environ), request, response) 

File "path/to/app/virtenv/lib/python2.6/site-packages/bottle-0.10.9-py2.6.egg/bottle.py", 
line 780, in _cast 
    return self._cast(out, request, response) 


File "path/to/app/virtenv/lib/python2.6/site-packages/bottle-0.10.9-py2.6.egg/bottle.py", 
line 780, in _cast 
    return self._cast(out, request, response) 

File "path/to/app/virtenv/lib/python2.6/site-packages/bottle-0.10.9-py2.6.egg/bottle.py", 
line 780, in _cast 
    return self._cast(out, request, response) 

File "path/to/app/virtenv/lib/python2.6/site-packages/bottle-0.10.9-py2.6.egg/bottle.py", 
line 780, in _cast 
    return self._cast(out, request, response) 

File "path/to/app/virtenv/lib/python2.6/site-packages/bottle-0.10.9-py2.6.egg/bottle.py", 
line 780, in _cast 
    return self._cast(out, request, response) 

File "path/to/app/virtenv/lib/python2.6/site-packages/bottle-0.10.9-py2.6.egg/bottle.py", 
line 780, in _cast 
    return self._cast(out, request, response) 

File "path/to/app/virtenv/lib/python2.6/site-packages/bottle-0.10.9-py2.6.egg/bottle.py", 
line 780, in _cast 
    return self._cast(out, request, response) 

File "path/to/app/virtenv/lib/python2.6/site-packages/bottle-0.10.9-py2.6.egg/bottle.py", 
line 780, in _cast 
    return self._cast(out, request, response) 

File "path/to/app/virtenv/lib/python2.6/site-packages/bottle-0.10.9-py2.6.egg/bottle.py", 
line 780, in _cast 
    return self._cast(out, request, response) 
RuntimeError: maximum recursion depth exceeded while calling a Python object 

的WSGI手柄：

#!/usr/bin/python 

import os 
import sys 
here = os.path.dirname(os.path.abspath(__file__)) 


try: 
    os.environ['PYTHON_EGG_CACHE'] = os.path.join(os.environ['OPENSHIFT_APP_DIR'],'virtenv/lib/python2.6/site-packages') 

except: 
    os.environ['PYTHON_EGG_CACHE'] = os.path.join(here,'..','data/virtenv/lib/python2.6/site-packages') 

print ('python egg cache set to: %s' % os.environ['PYTHON_EGG_CACHE']) 
try: 

    virtualenv = os.path.join(os.environ['OPENSHIFT_APP_DIR'],"virtenv/bin/activate_this.py") 
except: 
    virtualenv = os.path.join(here,'..',"data/virtenv/bin/activate_this.py") 

print ('virtualenv is in:%s' % virtualenv) 
try: 
    execfile(virtualenv, dict(__file__=virtualenv)) 
    print ('executed') 
    sys.path.append(here) 

except IOError: 
    pass 

from myapp import application 

myapp.py文件：

#!/bin/usr/env python 
#-*- coding:UTF-8 -*- 

from bottle import route,run, view, error, static_file, debug, url, redirect, request, response, default_app 

from wikifetch import init_db,load_session,Wikilink, statistic, wiki_populate 
import bottle 
from sqlalchemy.exc import StatementError 
#from config import production_port, production_server 
import json 
debug(True) 
bottle.TEMPLATE_PATH.append("./views") 

init_db() 
session = load_session() 
try: 
    stats = statistic() 
except: 
    print ("no data yet") 
    pass 

@route('/wsgi') 
def show_ip(): 
    env = request.environ 
    for k,v in env.items(): 
     print k,": ",v 
    return env 

@route() 
def default(): 
    redirect("/monitor") 

@route(["/monitor","/index","/"]) 
@view("monitor") 
def monitor(): 
    title = request.query.title 
    page = request.query.page or 0 
    page = int(page) 
    try: 
     total = stats[0] 
     all = session.query(Wikilink).filter(Wikilink.title.like('%'+ title +'%')).count() 
     monitor = session.query(Wikilink).order_by('title').filter(Wikilink.title.like('%'+ title +'%')).offset(page*20).limit(20).all() #filter(Wikilink.id>(page*20)) 
     #print "page=",page," title=",title, 
    except StatementError: 
     session.rollback() 
     #session.begin() 

    #print monitor 
    return dict(monitor=monitor,pages=(all/20),number=all,total = total) 

@route("/why") 
@view("why") 
def why(): 
    return dict() 

@route("/about") 
@view("about") 
def about(): 
    return dict() 

@route("/learned") 
@view("learned") 
def learned(): 
    return dict() 



@route("/stats") 
@view("stats") 
def statistic(): 
    return dict(stats= stats) 

@route ("/static/<filepath:path>", name="static") 
def static(filepath): 
    #print 'yey', filepath 
    return static_file(filepath,root = "./static/") 


@error(404) 
def error404(error): 
    return static_file('404.html',root="./static") 

#@error(502) 
@error(500) 
def error500(error): 
    return static_file('500.html', root = "./static") 

application = default_app() 

if __name__ =='__main__': 
    from wsgiref.simple_server import make_server #using the builtin wsgi server 
    httpd = make_server('localhost', 8052, application) 

我會很高興爲任何調試線索。

編輯：我嘗試設置遞歸限制較低，但只是失敗其他的事情（path.append，SQLAlchemy的等等），我起來，其他的事情失敗的水平以上（37準確地說）然後我得到此錯誤消息。當我被盯梢的錯誤日誌，我能夠生產另外2行錯誤堆棧之前去：

[Mon Mar 26 14:50:52 2012] [error] no data yet #if you look in the code above - means that wikiwatch.py file passed the first 'stats' function 

[Mon Mar 26 14:50:52 2012] [error] /home/usrname/workspace/appname/data/virtenv/lib/python2.6/site-packages/bottle.py:824: DeprecationWarning: Error handlers must not return :exc:`HTTPResponse`. 
[Mon Mar 26 14:50:52 2012] [error] out = self._cast(self._handle(environ), request, response) 

Answer 1

您的代碼觸發了錯誤處理程序，它似乎是在處理程序提出另一項錯誤。

因爲它沒有使用wsgi處理函數，所以它可能是一個觸發初始錯誤的路徑問題。您可以嘗試關閉錯誤處理程序以查看瓶子錯誤頁面，這可能會對此問題有所瞭解。

Reguarding在處理程序中引發的錯誤我注意到在​​3210函數中，您使用關鍵字參數root="./static/"，而在錯誤處理程序中，您省略了尾部斜槓。