Django mod_wsgi MemoryError

Question

Masz dziwny problem z MemoryError w moim projekcie Django.

• Ubuntu 11
• Apache2
• Nginx
• mod_wsgi
• python2.7

Mam szablon, który jest zmiana rozmiaru obrazów przy użyciu PIL i działa świetnie na moim spustoszone maszyna, ale w produkcji powoduje błąd 500 z dużymi obrazami (~ 800px). Tag szablonu działa bez problemu, ale tylko wtedy, gdy oryginalny obraz jest już bardzo mały. Znacznik szablonu jest zmodyfikowaną wersją http://djangosnippets.org/snippets/1944/

Po prostu próbowałem ponownej kompilacji mod_wsgi dla python2.7 - ten sam błąd.

Czy istnieje sposób na przydzielenie większej ilości pamięci lub może coś jeszcze, czego nie rozumiem?

Każda pomoc będzie bardzo ceniona!

Traceback e-maila do mnie:

Traceback (most recent call last): 

    File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py", line 111, in get_response 
     response = callback(request, *callback_args, **callback_kwargs) 

    File "/var/www/rizzyhome.com/www/django/rizzyhome/products/views.py", line 31, in designs 
     context_instance=RequestContext(request) 

    File "/usr/local/lib/python2.7/dist-packages/django/shortcuts/__init__.py", line 20, in render_to_response 
     return HttpResponse(loader.render_to_string(*args, **kwargs), **httpresponse_kwargs) 

    File "/usr/local/lib/python2.7/dist-packages/django/template/loader.py", line 188, in render_to_string 
     return t.render(context_instance) 

    File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 123, in render 
     return self._render(context) 

    File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 117, in _render 
     return self.nodelist.render(context) 

    File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 744, in render 
     bits.append(self.render_node(node, context)) 

    File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 757, in render_node 
     return node.render(context) 

    File "/usr/local/lib/python2.7/dist-packages/django/template/loader_tags.py", line 127, in render 
     return compiled_parent._render(context) 

    File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 117, in _render 
     return self.nodelist.render(context) 

    File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 744, in render 
     bits.append(self.render_node(node, context)) 

    File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 757, in render_node 
     return node.render(context) 

    File "/usr/local/lib/python2.7/dist-packages/django/template/loader_tags.py", line 127, in render 
     return compiled_parent._render(context) 

    File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 117, in _render 
     return self.nodelist.render(context) 

    File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 744, in render 
     bits.append(self.render_node(node, context)) 

    File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 757, in render_node 
     return node.render(context) 

    File "/usr/local/lib/python2.7/dist-packages/django/template/loader_tags.py", line 64, in render 
     result = block.nodelist.render(context) 

    File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 744, in render 
     bits.append(self.render_node(node, context)) 

    File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 757, in render_node 
     return node.render(context) 

    File "/usr/local/lib/python2.7/dist-packages/django/template/loader_tags.py", line 64, in render 
     result = block.nodelist.render(context) 

    File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 744, in render 
     bits.append(self.render_node(node, context)) 

    File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 757, in render_node 
     return node.render(context) 

    File "/usr/local/lib/python2.7/dist-packages/django/template/defaulttags.py", line 227, in render 
     nodelist.append(node.render(context)) 

    File "/usr/local/lib/python2.7/dist-packages/django/template/base.py", line 885, in render 
     return func(*func_args) 

    File "/var/www/rizzyhome.com/www/django/rizzyhome/products/templatetags/yair.py", line 108, in thumbnail 
     import Image, ImageOps 

    File "/usr/lib/python2.7/dist-packages/PIL/Image.py", line 45, in <module> 
     __import__("FixTk") 

    File "/usr/lib/python2.7/lib-tk/FixTk.py", line 15, in <module> 
     import ctypes 

    File "/usr/lib/python2.7/ctypes/__init__.py", line 549, in <module> 
     CFUNCTYPE(c_int)(lambda: None) 

    MemoryError 

Edycja: Dodawanie kodu

import os, errno 

from django import template 
from django.conf import settings 

register = template.Library() 

def _mkdir_p(path): 
    try: 
     os.makedirs(path) 
    except OSError as exc: # Python >2.5 
     if exc.errno == errno.EEXIST: 
      pass 
     else: raise 

@register.simple_tag 
def thumbnail(image_url, width, height, THIS_ROOT=settings.MEDIA_ROOT, THIS_URL=settings.MEDIA_URL, img_w=None, img_h=None, method="crop"): 
    """ 
    Given the url to an image, resizes the image using the given width and 
    height on the first time it is requested, and returns the url to the new 
    resized image. If width or height are zero then the original ratio is 
    maintained. 
    """ 

    if not img_w: 
     img_w = width 

    if not img_h: 
     img_w = height 

    image_url = unicode(image_url) 

    # determine new paths 
    resized_image_reduced = os.path.join('_resized_', image_url.replace(THIS_ROOT, '')) 

    file_name, file_ext = os.path.basename(resized_image_reduced).split(os.extsep) 
    resized_image_absolute_path = os.path.join(
     THIS_ROOT, 
     os.path.dirname(resized_image_reduced), 
     u'%s__%05d-%05d_%s%s%s' % (file_name, width, height, method, os.extsep, file_ext) 
    ) 
    resized_image_relative_url = os.path.join(
     THIS_URL, 
     os.path.dirname(resized_image_reduced), 
     u'%s__%05d-%05d_%s%s%s' % (file_name, width, height, method, os.extsep, file_ext) 
    ) 

    # make sure target directory exists 
    _mkdir_p(os.path.realpath(os.path.dirname(resized_image_absolute_path))) 

    # abort if thumbnail exists, original image doesn't exist, invalid width or 
    # height are given, or PIL not installed, or thumbnail is newer than source image 
    if os.path.exists(resized_image_absolute_path): 
     if os.path.exists(image_url): 
      if os.path.getmtime(resized_image_absolute_path) > os.path.getmtime(image_url): 
       return resized_image_relative_url 
     else: 
      return resized_image_relative_url 
    if not image_url: 
     return "" 

    try: 
     width = int(width) 
     height = int(height) 
    except ValueError: 
     return resized_image_relative_url 

    if not os.path.exists(image_url) or (width == 0 and height == 0): 
     return image_url 

    try: 
     from PIL import Image, ImageOps 
    except ImportError: 
     return resized_image_relative_url 

    # open image, determine ratio if required and resize/crop/save 
    image = Image.open(image_url) 
    if width == 0: 
     width = image.size[0] * height/image.size[1] 
    elif height == 0: 
     height = image.size[1] * width/image.size[0] 
    if image.mode not in ("L", "RGB"): 
     image = image.convert("RGB") 

    try: 
     if method == 'scale': 

      image.thumbnail((width, height), Image.ANTIALIAS) 


      new_w, new_h = image.size 

      x1 = (img_w-new_w) /2 
      y1 = (img_h-new_h) 

      new_image = Image.new(image.mode, (img_w, img_h), (255,255,255)) 
      new_image.paste(image, (x1,y1)) 

      new_image.save(
       resized_image_absolute_path, 
       "JPEG", 
       quality=100 
      ) 

     elif method == 'crop': 
      image = ImageOps.fit(image, (width, height), Image.ANTIALIAS) 
      image.save(
       resized_image_absolute_path, 
       "JPEG", 
       quality=100 
      ) 

    except Exception, e: 
     raise 
     return resized_image_relative_url 

    return resized_image_relative_url 

Answer 1

Dzięki bardzo za komentowanie i oferując pomoc.

Wygląda na to, że w module CTYPE występuje dziwny błąd w kodzie __init__.py. - czy cokolwiek, właśnie to przeczytałem :)

Poprawka, przynajmniej dla mnie, polegała na skomentowaniu ostatniej linii w pliku __init__.py. Wygląda na to, że ostatnia linia jest przeznaczona specjalnie dla 64-bitowego systemu Windows i zepsuła moje Ubuntu.

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=598727#38