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POrunning a bottle app from mod_wsgi handle results in maximum recursion depth exceeded while calling a Python object
 

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  1. POrunning a bottle app from mod_wsgi handle results in maximum recursion depth exceeded while calling a Python object
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    <p>I'm getting a strange "RuntimeError: maximum recursion depth exceeded while calling a Python object" from my bottle app. while running it from a wsgi handle (inside a virtualenv) in <strong>openshift</strong> paas service. </p> <p>the traceback doesn't offer me a clue about what's wrong</p> <p>I should also mention that running the bottle script straight on my dev maching (e.g python pythonapp.py) does work properly.</p> <p><strong>edit:</strong> In order to verify this problem is connected to running bottle with mod_wsgi I installed it on my dev computer. running straight python works. running with mod_wsgi gives me this strange RuntimeError <strong>end of edit</strong></p> <p>I saw in issue <a href="https://github.com/defnull/bottle/commit/882668ff342e89d6d91fb4138b8546632946d571" rel="nofollow">#201</a> that this problem was already "solved" but probably for another use case</p> <p>I'm using bottle 0.10.9 on python 2.6 in a linux server </p> <pre class="lang-none prettyprint-override"><code>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 </code></pre> <p>The WSGI handle:</p> <pre><code>#!/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 </code></pre> <p>the myapp.py file:</p> <pre><code>#!/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&gt;(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/&lt;filepath:path&gt;", 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) </code></pre> <p>I would be glad for any debugging clue.</p> <p><strong>edit:</strong> I tried setting the recursion limit lower but that just fails other things (path.append, sqlalchemy etc..) when I rise above the level that other things fail (37 to be precise) then I get this error message. when I tailed the error log I was able to produce another 2 lines that go before the error stack:</p> <pre><code>[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) </code></pre>
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    1. COSet the recursion limit much lower so that we can see what's calling that.
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      1. USIgnacio Vazquez-Abrams
    2. CO@IgnacioVazquez-Abrams tried that, doesn't seem to be very usefull but postes it as an edit.
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