You didn't answer about proxy. Also, do you reuse connections to redis.example.com <http://redis.example.com/>? Or create a new one for every request? If you aren't reusing them, maybe you should add timeout for connection creation and retry creating after timeout has exceeded. I know this doesn't solve the problem, but at least you wouldn't have to wait for server timeout.
I still think something is proxying your request to redis.example.com <http://redis.example.com/> and this something is what gives you timeouts and connection errors. > On 6 Dec 2016, at 17:41, Andreas Kuhne <andreas.ku...@suitopia.com> wrote: > > Hi, > > Thanks for you answer - I don't think the problem is with django either, but > thought that maybe someone else has run into the same issues on AWS. My cache > cluster worked fine for over 2 year as well, but now, not so much :-) > > 2016-12-06 14:35 GMT+01:00 GMail <robosl...@gmail.com > <mailto:robosl...@gmail.com>>: > Hi! > > Do you by any chance have any proxy on top of Redis? Seems like Django has > nothing to do with it, though. > > I don't know anything about dynamodb really, but I think implementing Django > cache with dynamo as backend should work. I've implemented Redis Cluster > cache for my project and it works fine. Here're the docs about session > engines: > https://docs.djangoproject.com/en/1.10/topics/http/sessions/#using-cached-sessions > > <https://docs.djangoproject.com/en/1.10/topics/http/sessions/#using-cached-sessions> > >> On 6 Dec 2016, at 15:55, Andreas Kuhne <andreas.ku...@suitopia.com >> <mailto:andreas.ku...@suitopia.com>> wrote: >> >> Hi, >> >> We are having a strange problem with our redis elasticache instances on AWS. >> We have our sessions stored in a redis cluster on AWS. Our webservers >> sometimes get a: >> * Error connecting to redis.example.com:6379 >> <http://redis.example.com:6379/>. timed out >> * Timeout reading from socket >> >> (I haven't included our real domain for the redis servers :-)) >> >> Both of these are related to our webservers connecting to our redis server. >> This started about a month ago, and worked perfectly for nearly 2 years >> before that. I really don't understand why this is happening. I know that >> the webservers have access to the redis servers, so I really can't >> understand the problem. Has anyone else experienced a similar problem? >> >> That was the first part of my question, my second is related to this though. >> For costsaving I would really like to dump the redis cluster and change to a >> dynamodb based session store. I have found a pypi package that works for the >> implementation, but when I tried it about 2 years ago, it failed miserably. >> We ended up having people get new sessions all the time and the sessions >> weren't being persisted corrrectly (each request ended up generating a new >> session). >> >> Has anyone successfully implemented a session store on dynamodb? With 2 >> webservers behind an loadbalancer? >> >> Also, has anyone any ideas of how to move the sessions from our redis store >> to the dynamodb database? >> >> Any tips / tricks would be very appreciated. >> >> Regards, >> >> Andréas >> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Django users" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to django-users+unsubscr...@googlegroups.com >> <mailto:django-users+unsubscr...@googlegroups.com>. >> To post to this group, send email to django-users@googlegroups.com >> <mailto:django-users@googlegroups.com>. >> Visit this group at https://groups.google.com/group/django-users >> <https://groups.google.com/group/django-users>. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/django-users/CALXYUb%3D89GTJ33FgE_DpjofdgOn2fYqVoctzo00NOq5K26Twmw%40mail.gmail.com >> >> <https://groups.google.com/d/msgid/django-users/CALXYUb%3D89GTJ33FgE_DpjofdgOn2fYqVoctzo00NOq5K26Twmw%40mail.gmail.com?utm_medium=email&utm_source=footer>. >> For more options, visit https://groups.google.com/d/optout >> <https://groups.google.com/d/optout>. > > > -- > You received this message because you are subscribed to the Google Groups > "Django users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to django-users+unsubscr...@googlegroups.com > <mailto:django-users+unsubscr...@googlegroups.com>. > To post to this group, send email to django-users@googlegroups.com > <mailto:django-users@googlegroups.com>. > Visit this group at https://groups.google.com/group/django-users > <https://groups.google.com/group/django-users>. > To view this discussion on the web visit > https://groups.google.com/d/msgid/django-users/13E0B717-29E6-43D5-AAD9-0FD4A4424186%40gmail.com > > <https://groups.google.com/d/msgid/django-users/13E0B717-29E6-43D5-AAD9-0FD4A4424186%40gmail.com?utm_medium=email&utm_source=footer>. > For more options, visit https://groups.google.com/d/optout > <https://groups.google.com/d/optout>. > > > -- > You received this message because you are subscribed to the Google Groups > "Django users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to django-users+unsubscr...@googlegroups.com > <mailto:django-users+unsubscr...@googlegroups.com>. > To post to this group, send email to django-users@googlegroups.com > <mailto:django-users@googlegroups.com>. > Visit this group at https://groups.google.com/group/django-users > <https://groups.google.com/group/django-users>. > To view this discussion on the web visit > https://groups.google.com/d/msgid/django-users/CALXYUbkum1Ou5x6yTqFxz-T1pG2%3D9_Km-_XbWBiFur34dVnXyg%40mail.gmail.com > > <https://groups.google.com/d/msgid/django-users/CALXYUbkum1Ou5x6yTqFxz-T1pG2%3D9_Km-_XbWBiFur34dVnXyg%40mail.gmail.com?utm_medium=email&utm_source=footer>. > For more options, visit https://groups.google.com/d/optout > <https://groups.google.com/d/optout>. -- You received this message because you are subscribed to the Google Groups "Django users" group. To unsubscribe from this group and stop receiving emails from it, send an email to django-users+unsubscr...@googlegroups.com. To post to this group, send email to django-users@googlegroups.com. Visit this group at https://groups.google.com/group/django-users. To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/E58F1469-2A35-45DC-8F5D-7DC9D6E61650%40gmail.com. For more options, visit https://groups.google.com/d/optout.
