Anyway to get around this error : TemplateSyntaxError , Caught MemcachedKeyLengthError while rendering: Key length is > 250_问答_开发者

Environment:

Request Method: GET
Request URL: http://127.0.0.1/

Django Version: 1.3
Python Version: 2.6.5
Installed Applications:
['django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.sites',
 'django.contrib.admin',
 'esp.datatree',
 'esp.users',
 'esp.membership',
 'esp.miniblog',
 'esp.web',
 'esp.program',
 'esp.program.modules',
 'esp.dbmail',
 'esp.cal',
 'esp.lib',
 'esp.setup',
 'esp.qsd',
 'esp.qsdmedia',
 'esp.resources',
 'esp.gen_media',
 'esp.dblog',
 'esp.membership',
 'esp.queue',
 'esp.survey',
 'esp.accounting_core',
 'esp.accounting_docs',
 'esp.shortterm',
 'esp.utils',
 'esp.cache',
 'esp.cache_loader',
 'esp.tagdict',
 'django_extensions',
 'south',
 'sslauth']
Installed Middleware:
['esp.middleware.threadlocalrequest.ThreadLocals',
 'esp.middleware.FixIEMiddleware',
 'esp.middleware.ESPErrorMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'esp.middleware.espauthmiddleware.ESPAuthMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.middleware.doc.XViewMiddleware',
 'sslauth.middleware.SSLAuthMiddleware',
 'django.middleware.gzip.GZipMiddleware',
 'esp.middleware.PrettyErrorEmailMiddleware',
 'esp.middleware.StripWhitespaceMiddleware',
 'django.middleware.transaction.TransactionMiddleware',
 'esp.datatree.middleware.DataTreeLockMiddleware']

Template error:

In template /home/me/mysite/esp/templates/main.html, error at line 77
   Caught MemcachedKeyLengthError while rendering: Key length is > 250
   67 :     <!-- CSS2 doesn't allow vertical alignment without a table.  So, give it a table. -->
   68 :     <table width="600px" height="30px"><tr><td valign="middle">Welcome to ESP</td></tr></table>
   69 : {% endblock %}
   70 : </div>
   71 : 
   72 : {% block navbar %}
   73 : <div id="navbar">
   74 :     <div id="navbar_content">
   75 :     <span class="announcementlink_title">Relevant Links</span>
   76 :     {% load navbar %}
   77 :      {% navbar_gen request.path request.user navbar_list %} 
   78 :     </div>
   79 : 
   80 :     <div id="navbar_content">
   81 : 
   82 :     {% load preview %}
   83 :     {% miniblog_for_user request.user as announcements 6 %}
   84 : 
   85 :     {% load smartypants %}
   86 :     {% load markdown %}
   87 :     {% for announce in announcements.announcementList %}

Traceback:

File "/usr/local/lib/python2.6/dist-packages/Django-1.3-py2.6.egg/django/core/handlers/base.py" in get_response
  111.                         response = callback(request, *callback_args, **callback_kwargs)
File "/home/lakshay/mysite/esp/esp/esp/web/views/main.py" in home
  81.     return render_to_response('index.html', request, GetNode('Q/Web'), context)
File "/home/lakshay/mysite/esp/esp/esp/web/util/main.py" in render_to_response
  123.         return render_response(request, template, context, mimetype=mimetype)
File "/home/lakshay/mysite/esp/esp/esp/web/util/main.py" in render_response
  67.     return django.shortcuts.render_to_response(template, {}, context_instance = inst, mimetype=mimetype, )
File "/usr/local/lib/python2.6/dist-packages/Django-1.3-py2.6.egg/django/shortcuts/__init__.py" in render_to_response
  20.     return HttpResponse(loader.render_to_string(*args, **kwargs), **httpresponse_kwargs)
File "/usr/local/lib/python2.6/dist-packages/Django-1.3-py2.6.egg/django/template/loader.py" in r开发者_StackOverflowender_to_string
  188.         return t.render(context_instance)
File "/usr/local/lib/python2.6/dist-packages/Django-1.3-py2.6.egg/django/template/base.py" in render
  123.             return self._render(context)
File "/usr/local/lib/python2.6/dist-packages/Django-1.3-py2.6.egg/django/template/base.py" in _render
  117.         return self.nodelist.render(context)
File "/usr/local/lib/python2.6/dist-packages/Django-1.3-py2.6.egg/django/template/base.py" in render
  744.                 bits.append(self.render_node(node, context))
File "/usr/local/lib/python2.6/dist-packages/Django-1.3-py2.6.egg/django/template/debug.py" in render_node
  73.             result = node.render(context)
File "/usr/local/lib/python2.6/dist-packages/Django-1.3-py2.6.egg/django/template/loader_tags.py" in render
  127.         return compiled_parent._render(context)
File "/usr/local/lib/python2.6/dist-packages/Django-1.3-py2.6.egg/django/template/base.py" in _render
  117.         return self.nodelist.render(context)
File "/usr/local/lib/python2.6/dist-packages/Django-1.3-py2.6.egg/django/template/base.py" in render
  744.                 bits.append(self.render_node(node, context))
File "/usr/local/lib/python2.6/dist-packages/Django-1.3-py2.6.egg/django/template/debug.py" in render_node
  73.             result = node.render(context)
File "/usr/local/lib/python2.6/dist-packages/Django-1.3-py2.6.egg/django/template/loader_tags.py" in render
  127.         return compiled_parent._render(context)
File "/usr/local/lib/python2.6/dist-packages/Django-1.3-py2.6.egg/django/template/base.py" in _render
  117.         return self.nodelist.render(context)
File "/usr/local/lib/python2.6/dist-packages/Django-1.3-py2.6.egg/django/template/base.py" in render
  744.                 bits.append(self.render_node(node, context))
File "/usr/local/lib/python2.6/dist-packages/Django-1.3-py2.6.egg/django/template/debug.py" in render_node
  73.             result = node.render(context)
File "/usr/local/lib/python2.6/dist-packages/Django-1.3-py2.6.egg/django/template/loader_tags.py" in render
  64.             result = block.nodelist.render(context)
File "/usr/local/lib/python2.6/dist-packages/Django-1.3-py2.6.egg/django/template/base.py" in render
  744.                 bits.append(self.render_node(node, context))
File "/usr/local/lib/python2.6/dist-packages/Django-1.3-py2.6.egg/django/template/debug.py" in render_node
  73.             result = node.render(context)
File "/usr/local/lib/python2.6/dist-packages/Django-1.3-py2.6.egg/django/template/loader_tags.py" in render
  64.             result = block.nodelist.render(context)
File "/usr/local/lib/python2.6/dist-packages/Django-1.3-py2.6.egg/django/template/base.py" in render
  744.                 bits.append(self.render_node(node, context))
File "/usr/local/lib/python2.6/dist-packages/Django-1.3-py2.6.egg/django/template/debug.py" in render_node
  73.             result = node.render(context)
File "/home/lakshay/mysite/esp/esp/esp/web/util/template.py" in render
  141.                     return self.render_given_args(args)
File "/home/lakshay/mysite/esp/esp/esp/cache/argcache.py" in __call__
  641.             retVal = self.get(arg_list)
File "/home/lakshay/mysite/esp/esp/esp/cache/argcache.py" in get
  339.         ans_dict = self.cache.get_many(keys_to_get)
File "/home/lakshay/mysite/esp/esp/esp/utils/try_multi.py" in retried_fn
  16.             return fn(*args, **kwargs)
File "/home/lakshay/mysite/esp/esp/esp/utils/memcached_multikey.py" in get_many
  76.         wrapped_ans = self._wrapped_cache.get_many(keys_dict.keys())
File "/usr/local/lib/python2.6/dist-packages/Django-1.3-py2.6.egg/django/core/cache/backends/memcached.py" in get_many
  73.         ret = self._cache.get_multi(new_keys)
File "/usr/local/lib/python2.6/dist-packages/python_memcached-1.40-py2.6.egg/memcache.py" in get_multi
  680.         server_keys, prefixed_to_orig_key = self._map_and_prefix_keys(keys, key_prefix)
File "/usr/local/lib/python2.6/dist-packages/python_memcached-1.40-py2.6.egg/memcache.py" in _map_and_prefix_keys
  465.             check_key(str_orig_key, key_extra_len=key_extra_len)
File "/usr/local/lib/python2.6/dist-packages/python_memcached-1.40-py2.6.egg/memcache.py" in check_key
  885.                      % SERVER_MAX_KEY_LENGTH)

Exception Type: TemplateSyntaxError at /
Exception Value: Caught MemcachedKeyLengthError while rendering: Key length is > 250