Setting the key CACHE_MIDDLEWARE_ALIAS to 'default' fixes the issue
Cheers,
Nanda
On Thursday, March 10, 2016 at 5:02:37 PM UTC-8, nav wrote:
>
> Sorry forgot to add the traceback I am getting:
>
> Internal Server Error: /
> Traceback (most recent call last):
> File
> "/Users/nchandrasekhar/PycharmProjects/horizon/.venv/lib/python2.7/site-packages/django/core/handlers/base.py",
>
> line 88, in get_response
> response = middleware_method(request)
> File
> "/Users/nchandrasekhar/PycharmProjects/horizon/.venv/lib/python2.7/site-packages/django/middleware/cache.py",
>
> line 147, in process_request
> cache_key = get_cache_key(request, self.key_prefix, 'GET',
> cache=self.cache)
> File
> "/Users/nchandrasekhar/PycharmProjects/horizon/.venv/lib/python2.7/site-packages/django/utils/cache.py",
>
> line 212, in get_cache_key
> headerlist = cache.get(cache_key, None)
> File
> "/Users/nchandrasekhar/PycharmProjects/horizon/.venv/lib/python2.7/site-packages/django/core/cache/backends/memcached.py",
>
> line 75, in get
> val = self._cache.get(key)
> File
> "/Users/nchandrasekhar/PycharmProjects/horizon/.venv/lib/python2.7/site-packages/django/core/cache/backends/memcached.py",
>
> line 163, in _cache
> self._client = self._lib.Client(self._servers,
> pickleProtocol=pickle.HIGHEST_PROTOCOL)
> File
> "/Users/nchandrasekhar/PycharmProjects/horizon/.venv/lib/python2.7/site-packages/memcache.py",
>
> line 223, in __init__
> self.set_servers(servers)
> File
> "/Users/nchandrasekhar/PycharmProjects/horizon/.venv/lib/python2.7/site-packages/memcache.py",
>
> line 302, in set_servers
> for s in servers]
> File
> "/Users/nchandrasekhar/PycharmProjects/horizon/.venv/lib/python2.7/site-packages/memcache.py",
>
> line 1317, in __init__
> raise ValueError('Unable to parse connection string: "%s"' % host)
> ValueError: Unable to parse connection string: ""
> ----------------------------------------
> Exception happened during processing of request from ('127.0.0.1', 52825)
> ----------------------------------------
> [11/Mar/2016 00:59:39] "GET / HTTP/1.1" 500 118134
> Traceback (most recent call last):
> File
> "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/wsgiref/handlers.py",
>
> line 86, in run
> self.finish_response()
> File
> "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/wsgiref/handlers.py",
>
> line 131, in finish_response
> self.close()
> File
> "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/wsgiref/simple_server.py",
>
> line 36, in close
> SimpleHandler.close(self)
> File
> "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/wsgiref/handlers.py",
>
> line 259, in close
> self.result.close()
> File
> "/Users/nchandrasekhar/PycharmProjects/horizon/.venv/lib/python2.7/site-packages/django/http/response.py",
>
> line 305, in close
> signals.request_finished.send(sender=self._handler_class)
> File
> "/Users/nchandrasekhar/PycharmProjects/horizon/.venv/lib/python2.7/site-packages/django/dispatch/dispatcher.py",
>
> line 185, in send
> response = receiver(signal=self, sender=sender, **named)
> File
> "/Users/nchandrasekhar/PycharmProjects/horizon/.venv/lib/python2.7/site-packages/django/core/cache/backends/memcached.py",
>
> line 100, in close
> self._cache.disconnect_all()
> File
> "/Users/nchandrasekhar/PycharmProjects/horizon/.venv/lib/python2.7/site-packages/django/core/cache/backends/memcached.py",
>
> line 163, in _cache
> self._client = self._lib.Client(self._servers,
> pickleProtocol=pickle.HIGHEST_PROTOCOL)
> File
> "/Users/nchandrasekhar/PycharmProjects/horizon/.venv/lib/python2.7/site-packages/memcache.py",
>
> line 223, in __init__
> self.set_servers(servers)
> File
> "/Users/nchandrasekhar/PycharmProjects/horizon/.venv/lib/python2.7/site-packages/memcache.py",
>
> line 302, in set_servers
> for s in servers]
> File
> "/Users/nchandrasekhar/PycharmProjects/horizon/.venv/lib/python2.7/site-packages/memcache.py",
>
> line 1317, in __init__
> raise ValueError('Unable to parse connection string: "%s"' % host)
> ValueError: Unable to parse connection string: ""
> [11/Mar/2016 00:59:39] "GET / HTTP/1.1" 500 59
> Traceback (most recent call last):
> File
> "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/SocketServer.py",
>
> line 599, in process_request_thread
> self.finish_request(request, client_address)
> File
> "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/SocketServer.py",
>
> line 334, in finish_request
> self.RequestHandlerClass(request, client_address, self)
> File
> "/Users/nchandrasekhar/PycharmProjects/horizon/.venv/lib/python2.7/site-packages/django/core/servers/basehttp.py",
>
> line 126, in __init__
> super(WSGIRequestHandler, self).__init__(*args, **kwargs)
> File
> "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/SocketServer.py",
>
> line 655, in __init__
> self.handle()
> File
> "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/wsgiref/simple_server.py",
>
> line 131, in handle
> handler.run(self.server.get_app())
> File
> "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/wsgiref/handlers.py",
>
> line 92, in run
> self.close()
> File
> "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/wsgiref/simple_server.py",
>
> line 33, in close
> self.status.split(' ',1)[0], self.bytes_sent
> AttributeError: 'NoneType' object has no attribute 'split'
> Internal Server Error: /favicon.ico
> Traceback (most recent call last):
> File
> "/Users/nchandrasekhar/PycharmProjects/horizon/.venv/lib/python2.7/site-packages/django/core/handlers/base.py",
>
> line 88, in get_response
> response = middleware_method(request)
> File
> "/Users/nchandrasekhar/PycharmProjects/horizon/.venv/lib/python2.7/site-packages/django/middleware/cache.py",
>
> line 147, in process_request
> cache_key = get_cache_key(request, self.key_prefix, 'GET',
> cache=self.cache)
> File
> "/Users/nchandrasekhar/PycharmProjects/horizon/.venv/lib/python2.7/site-packages/django/utils/cache.py",
>
> line 212, in get_cache_key
> headerlist = cache.get(cache_key, None)
> File
> "/Users/nchandrasekhar/PycharmProjects/horizon/.venv/lib/python2.7/site-packages/django/core/cache/backends/memcached.py",
>
> line 75, in get
> val = self._cache.get(key)
> File
> "/Users/nchandrasekhar/PycharmProjects/horizon/.venv/lib/python2.7/site-packages/django/core/cache/backends/memcached.py",
>
> line 163, in _cache
> self._client = self._lib.Client(self._servers,
> pickleProtocol=pickle.HIGHEST_PROTOCOL)
> File
> "/Users/nchandrasekhar/PycharmProjects/horizon/.venv/lib/python2.7/site-packages/memcache.py",
>
> line 223, in __init__
> self.set_servers(servers)
> File
> "/Users/nchandrasekhar/PycharmProjects/horizon/.venv/lib/python2.7/site-packages/memcache.py",
>
> line 302, in set_servers
> for s in servers]
> File
> "/Users/nchandrasekhar/PycharmProjects/horizon/.venv/lib/python2.7/site-packages/memcache.py",
>
> line 1317, in __init__
> raise ValueError('Unable to parse connection string: "%s"' % host)
> ValueError: Unable to parse connection string: ""
> ----------------------------------------
> Exception happened during processing of request from ('127.0.0.1', 52828)
> ----------------------------------------
> Traceback (most recent call last):
> File
> "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/wsgiref/handlers.py",
>
> line 86, in run
> self.finish_response()
> File
> "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/wsgiref/handlers.py",
>
> line 131, in finish_response
> self.close()
> File
> "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/wsgiref/simple_server.py",
>
> line 36, in close
> SimpleHandler.close(self)
> File
> "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/wsgiref/handlers.py",
>
> line 259, in close
> self.result.close()
> File
> "/Users/nchandrasekhar/PycharmProjects/horizon/.venv/lib/python2.7/site-packages/django/http/response.py",
>
> line 305, in close
> signals.request_finished.send(sender=self._handler_class)
> File
> "/Users/nchandrasekhar/PycharmProjects/horizon/.venv/lib/python2.7/site-packages/django/dispatch/dispatcher.py",
>
> line 185, in send
> response = receiver(signal=self, sender=sender, **named)
> File
> "/Users/nchandrasekhar/PycharmProjects/horizon/.venv/lib/python2.7/site-packages/django/core/cache/backends/memcached.py",
>
> line 100, in close
> self._cache.disconnect_all()
> File
> "/Users/nchandrasekhar/PycharmProjects/horizon/.venv/lib/python2.7/site-packages/django/core/cache/backends/memcached.py",
>
> line 163, in _cache
> self._client = self._lib.Client(self._servers,
> pickleProtocol=pickle.HIGHEST_PROTOCOL)
> File
> "/Users/nchandrasekhar/PycharmProjects/horizon/.venv/lib/python2.7/site-packages/memcache.py",
>
> line 223, in __init__
> self.set_servers(servers)
> File
> "/Users/nchandrasekhar/PycharmProjects/horizon/.venv/lib/python2.7/site-packages/memcache.py",
>
> line 302, in set_servers
> for s in servers]
> File
> "/Users/nchandrasekhar/PycharmProjects/horizon/.venv/lib/python2.7/site-packages/memcache.py",
>
> line 1317, in __init__
> raise ValueError('Unable to parse connection string: "%s"' % host)
> ValueError: Unable to parse connection string: ""
> Traceback (most recent call last):
> File
> "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/SocketServer.py",
>
> line 599, in process_request_thread
> self.finish_request(request, client_address)
> File
> "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/SocketServer.py",
>
> line 334, in finish_request
> self.RequestHandlerClass(request, client_address, self)
> File
> "/Users/nchandrasekhar/PycharmProjects/horizon/.venv/lib/python2.7/site-packages/django/core/servers/basehttp.py",
>
> line 126, in __init__
> super(WSGIRequestHandler, self).__init__(*args, **kwargs)
> File
> "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/SocketServer.py",
>
> line 655, in __init__
> self.handle()
> File
> "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/wsgiref/simple_server.py",
>
> line 131, in handle
> handler.run(self.server.get_app())
> File
> "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/wsgiref/handlers.py",
>
> line 92, in run
> self.close()
> File
> "/usr/local/Cellar/python/2.7.10_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/wsgiref/simple_server.py",
>
> line 33, in close
> self.status.split(' ',1)[0], self.bytes_sent
> AttributeError: 'NoneType' object has no attribute 'split'
>
> On Thu, Mar 10, 2016 at 4:44 PM, nav <navanitach...@gmail.com> wrote:
>
>> Hi,
>>
>> I am configuring the memcache backend to use with django and have the
>> following things setup:
>>
>> CACHES = {
>> 'default': {
>> 'BACKEND': 'django.core.cache.backends.memcached.MemcachedCache',
>> 'LOCATION': '127.0.0.1:11211',
>> }
>> }
>>
>> CACHE_MIDDLEWARE_ALIAS =
>> 'django.core.cache.backends.memcached.MemcachedCache'
>> CACHE_MIDDLEWARE_SECONDS = 3 * 60 * 60 # 3 hours in seconds
>> CACHE_MIDDLEWARE_KEY_PREFIX = ''
>>
>>
>> MIDDLEWARE_CLASSES = (
>> 'django.middleware.common.CommonMiddleware',
>> 'django.middleware.csrf.CsrfViewMiddleware',
>> 'django.contrib.sessions.middleware.SessionMiddleware',
>> 'django.contrib.auth.middleware.AuthenticationMiddleware',
>> 'django.contrib.messages.middleware.MessageMiddleware',
>> 'django.middleware.doc.XViewMiddleware',
>> 'django.middleware.locale.LocaleMiddleware',
>> 'django.middleware.clickjacking.XFrameOptionsMiddleware',
>> 'django.middleware.cache.UpdateCacheMiddleware',
>> 'django.middleware.common.CommonMiddleware',
>> 'django.middleware.cache.FetchFromCacheMiddleware',
>> # the order of our middleware matters!
>> # should be later than AuthenticationMiddleware,
>> # but earlier than HorizonMiddleware
>> 'horizon.middleware.HorizonMiddleware',
>> )
>>
>>
>> I keep hitting the error message "Unable to parse connection string: ""
>> which is coming from the memcache.py from the python-memcached binding. This
>> is because the tuple of cache servers is empty instead of containing
>> 127.0.0.1:11211.
>>
>>
>> I have verified that the memcache daemon is up and running and have added
>> and retrieved data from it.
>>
>>
>> Hence, I believe that there is something wrong with my configuration and I
>> have been trying to figure out what is wrong for hours. I hope someone can
>> lend some assistance.
>>
>>
>> Many thanks,
>>
>> nav
>>
>> P.S. This is the first time I am setting up a cache so I may need some
>> explanation of some concepts.
>>
>>
>> --
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>
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