Right, I was trying to explain that the "Could not get response" message doesn't tell you what's wrong, but could be a symptom of many things. From the machine running your Django app, could you attempt to connect using the `curl` command line tool? e.g.
curl http://riakhost:8098/ If that does not work, then Riak isn't running or is not accessible. On Sat, Oct 26, 2013 at 10:49 PM, Naveen Tamanam <naveen32in...@gmail.com>wrote: > Here in my testing environment there are only 2 to 3 users so I don't > think this much traffic requires the very high ulimit. > > So what would be the cause of getting error(exception) "Could not get > response" in python-riak. > > > On Sun, Oct 27, 2013 at 3:25 AM, Naveen Tamanam > <naveen32in...@gmail.com>wrote: > >> Thanks for your valuable time. >> >> We may consider the ulimit under large load but here in my testing >> there are only two to three uses. >> >> I don't think low ulimit causes the "Could not get reponse " problem. >> >> I would like to know what is the reason behind this error. >> >> >> >> >> On Sun, Oct 27, 2013 at 1:00 AM, Sean Cribbs <s...@basho.com> wrote: >> >>> Resending to list... >>> >>> That is also definitely possible. Ensure that ulimit -n is high enough >>> for Riak, and that the Riak node is still running after you start it. >>> `riak-admin ping` will tell you if it's still running. >>> >>> >>> On Sat, Oct 26, 2013 at 7:23 PM, Naveen Tamanam <naveen32in...@gmail.com >>> > wrote: >>> >>>> Do you suspect the ulimit it is configured to very low for my >>>> testing environment. >>>> >>>> >>>> On Sun, Oct 27, 2013 at 12:24 AM, Sean Cribbs <s...@basho.com> wrote: >>>> >>>>> Python riak-2.0.x will work with older clusters, yes, but you might >>>>> get NotImplementedError raised when the server does not support specific >>>>> functionality. >>>>> >>>>> The retry logic in riak-1.5.x was very flakey, I don't trust it. My >>>>> guess is that something is wrong with the configuration of either the >>>>> client or the cluster. I would check the hosts/ports to be sure. >>>>> >>>>> >>>>> On Sat, Oct 26, 2013 at 6:27 PM, Naveen Tamanam < >>>>> naveen32in...@gmail.com> wrote: >>>>> >>>>>> I am using *Python riak-1.5.2. >>>>>> >>>>>> * >>>>>> *Any idea about error that I have mentioned. >>>>>> >>>>>> * >>>>>> *Is that python riak 2.0 has backward compatibility? >>>>>> * >>>>>> ** >>>>>> * >>>>>> * >>>>>> >>>>>> >>>>>> On Sat, Oct 26, 2013 at 10:07 PM, Sean Cribbs <s...@basho.com> wrote: >>>>>> >>>>>>> Naveen, >>>>>>> >>>>>>> If you are using Riak 1.4, please upgrade to the 2.0.x package of >>>>>>> the client. Maintenance on the 1.5.x series has ceased. >>>>>>> >>>>>>> >>>>>>> On Fri, Oct 25, 2013 at 10:29 PM, Naveen Tamanam < >>>>>>> naveen32in...@gmail.com> wrote: >>>>>>> >>>>>>>> Hi All, >>>>>>>> >>>>>>>> I am using the riak with python/django. >>>>>>>> >>>>>>>> Sometimes I am getting the error "Could not get response" >>>>>>>> >>>>>>>> I am using Djang*o 1.5 >>>>>>>> Python riak-1.5.2 >>>>>>>> >>>>>>>> The error description is as follows; >>>>>>>> >>>>>>>> >>>>>>>> * >>>>>>>> >>>>>>>> Django Version: 1.5 >>>>>>>> Python Version: 2.6.6 >>>>>>>> Installed Applications: >>>>>>>> ('django.contrib.auth', >>>>>>>> 'django.contrib.contenttypes', >>>>>>>> 'django.contrib.sessions', >>>>>>>> 'django.contrib.sites', >>>>>>>> 'django.contrib.messages', >>>>>>>> 'django.contrib.staticfiles', >>>>>>>> ) >>>>>>>> Installed Middleware: >>>>>>>> ('django.middleware.common.CommonMiddleware', >>>>>>>> 'django.contrib.sessions.middleware.SessionMiddleware', >>>>>>>> 'django.contrib.auth.middleware.AuthenticationMiddleware', >>>>>>>> 'django.contrib.messages.middleware.MessageMiddleware') >>>>>>>> >>>>>>>> Traceback: >>>>>>>> File >>>>>>>> "/usr/lib/python2.6/site-packages/Django-1.5-py2.6.egg/django/core/handlers/base.py" >>>>>>>> in get_response >>>>>>>> 115. response = callback(request, *callback_args, **callback_kwargs) >>>>>>>> File "/opt/backend/mobichat/userapp/edit_views.py" in editCamp >>>>>>>> 100. campinfo = helpers.getCampinfoForTemplating(request, url=key) >>>>>>>> File "/opt/backend/mobichat/userapp/helpers.py" in >>>>>>>> getCampinfoForTemplating >>>>>>>> 213. campinfo['logo_url'], campinfo['logo_name'] = >>>>>>>> CampaignLogoPath.get(url) >>>>>>>> File "/opt/backend/mobichat/common/riak_backend/riak_backend.py" in >>>>>>>> get >>>>>>>> 1806. obj = cls.bucket.get(camp_uid) >>>>>>>> File >>>>>>>> "/usr/lib/python2.6/site-packages/riak-1.5.2-py2.6.egg/riak/bucket.py" >>>>>>>> in >>>>>>>> get >>>>>>>> 326. return obj.reload(r=r, pr=pr) >>>>>>>> File >>>>>>>> "/usr/lib/python2.6/site-packages/riak-1.5.2-py2.6.egg/riak/riak_object.py" >>>>>>>> in reload >>>>>>>> 459. Result = t.get(self, r=r, pr=pr, vtag=vtag) >>>>>>>> File >>>>>>>> "/usr/lib/python2.6/site-packages/riak-1.5.2-py2.6.egg/riak/transports/http.py" >>>>>>>> in get >>>>>>>> 152. response = self.http_request('GET', url) >>>>>>>> File >>>>>>>> "/usr/lib/python2.6/site-packages/riak-1.5.2-py2.6.egg/riak/transports/http.py" >>>>>>>> in http_request >>>>>>>> 626. raise RiakError("could not get a response") >>>>>>>> >>>>>>>> Exception Type: RiakError at >>>>>>>> /manager/camp-edit/EHbo24hFYDZGsg8ujpY9itDtM2a >>>>>>>> Exception Value: 'could not get a response' >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> Any body please help me out to fix the above issue. >>>>>>>> >>>>>>>> I see the riak source code >>>>>>>> >>>>>>>> Moudle is at riak-1.5.2-py2.6.egg/riak/transports/http.py >>>>>>>> >>>>>>>> The function where that is coming is as follows >>>>>>>> >>>>>>>> def http_request(self, method, uri, headers=None, body=''): >>>>>>>> """ >>>>>>>> Given a Method, URL, Headers, and Body, perform and HTTP >>>>>>>> request, >>>>>>>> and return a 2-tuple containing a dictionary of response >>>>>>>> headers >>>>>>>> and the response body. >>>>>>>> """ >>>>>>>> if headers is None: >>>>>>>> headers = {} >>>>>>>> # Run the request... >>>>>>>> for retry in range(self.RETRY_COUNT): >>>>>>>> with self._conns.withconn() as conn: >>>>>>>> ### should probably build this try/except into a >>>>>>>> custom >>>>>>>> ### contextmanager for the connection. >>>>>>>> try: >>>>>>>> conn.request(method, uri, body, headers) >>>>>>>> response = conn.getresponse() >>>>>>>> >>>>>>>> try: >>>>>>>> # Get the response headers... >>>>>>>> response_headers = {'http_code': >>>>>>>> response.status} >>>>>>>> for (key, value) in response.getheaders(): >>>>>>>> response_headers[key.lower()] = value >>>>>>>> >>>>>>>> # Get the body... >>>>>>>> response_body = response.read() >>>>>>>> finally: >>>>>>>> response.close() >>>>>>>> >>>>>>>> return response_headers, response_body >>>>>>>> except socket.error, e: >>>>>>>> conn.close() >>>>>>>> if e[0] == errno.ECONNRESET: >>>>>>>> # Grab another connection and try again. >>>>>>>> continue >>>>>>>> # Don't know how to handle this. >>>>>>>> raise >>>>>>>> except httplib.HTTPException: >>>>>>>> # Just close the connection and try again. >>>>>>>> conn.close() >>>>>>>> continue >>>>>>>> >>>>>>>> # No luck, even with retrying. >>>>>>>> raise RiakError("could not get a response") >>>>>>>> >>>>>>>> >>>>>>>> At line number 626 in riak/transport/http.py >>>>>>>> where http_requst is at http.RiakHttpTransport.http_request >>>>>>>> >>>>>>>> >>>>>>>> This is error is coming very often. For what reason it is coming >>>>>>>> and how to get permanent solution for this error . >>>>>>>> >>>>>>>> -- >>>>>>>> Thanks & Regards, >>>>>>>> Naveen Tamanam >>>>>>>> >>>>>>>> _______________________________________________ >>>>>>>> riak-users mailing list >>>>>>>> riak-users@lists.basho.com >>>>>>>> http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com >>>>>>>> >>>>>>>> >>>>>>> >>>>>>> >>>>>>> -- >>>>>>> Sean Cribbs <s...@basho.com> >>>>>>> Software Engineer >>>>>>> Basho Technologies, Inc. >>>>>>> http://basho.com/ >>>>>>> >>>>>> >>>>>> >>>>>> >>>>>> -- >>>>>> Thanks & Regards, >>>>>> Naveen Tamanam >>>>>> >>>>> >>>>> >>>>> >>>>> -- >>>>> Sean Cribbs <s...@basho.com> >>>>> Software Engineer >>>>> Basho Technologies, Inc. >>>>> http://basho.com/ >>>>> >>>> >>>> >>>> >>>> -- >>>> Thanks & Regards, >>>> Naveen Tamanam >>>> >>> >>> >>> >>> -- >>> Sean Cribbs <s...@basho.com> >>> Software Engineer >>> Basho Technologies, Inc. >>> http://basho.com/ >>> >> >> >> >> -- >> Thanks & Regards, >> Naveen Tamanam >> > > > > -- > Thanks & Regards, > Naveen Tamanam > -- Sean Cribbs <s...@basho.com> Software Engineer Basho Technologies, Inc. http://basho.com/
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