Celery Issue : Cannot start edx in sandbox on ec2 aws

[disisid]

hi,
I have been trying to start an edx using the config wiki on a t1.micro ec2 instance. I have followed the steps to install edx on Ubuntu precise 12.04 using ansible but could not access either lms or cms. So, I check the sys log.

Here I found this error repeating:

[service_variant=lms][celery.worker.consumer][env:sandbox] ERROR [ip-172-31-3-58 7979] [consumer.py:397] - consumer: Connection to broker lost. Tryi$
Traceback (most recent call last):
File "/edx/app/edxapp/venvs/edxapp/local/lib/python2.7/site-packages/celery/worker/consumer.py", line 395, in start
self.consume_messages()
File "/edx/app/edxapp/venvs/edxapp/local/lib/python2.7/site-packages/celery/worker/consumer.py", line 458, in consume_messages
poll_timeout = (fire_timers(propagate=errors) if scheduled
File "/edx/app/edxapp/venvs/edxapp/local/lib/python2.7/site-packages/celery/worker/hub.py", line 157, in fire_timers
entry()
File "/edx/app/edxapp/venvs/edxapp/local/lib/python2.7/site-packages/celery/utils/timer2.py", line 59, in call
return self.fun(_self.args, *_self.kwargs)
File "/edx/app/edxapp/venvs/edxapp/local/lib/python2.7/site-packages/celery/utils/timer2.py", line 165, in _reschedules
return fun(_args, *_kwargs)
File "/edx/app/edxapp/venvs/edxapp/local/lib/python2.7/site-packages/kombu/connection.py", line 270, in heartbeat_check
return self.transport.heartbeat_check(self.connection, rate=rate)
File "/edx/app/edxapp/venvs/edxapp/local/lib/python2.7/site-packages/kombu/transport/pyamqp.py", line 134, in heartbeat_check
return connection.heartbeat_tick(rate=rate)
File "/edx/app/edxapp/venvs/edxapp/local/lib/python2.7/site-packages/amqp/connection.py", line 844, in heartbeat_tick
raise ConnectionError('Too many heartbeats missed')

Can anyone please help me what does this mean. Secondly, do I need to change the defaults in the json files before running ansible.

Here is the public url of the ec2 instance: http://ec2-54-254-185-46.ap-southeast-1.compute.amazonaws.com/

[disisid]

Can anyone please help on this. I have to launch immediately.
Thanks.

[acs022]

I'm not sure if you figured this problem out, but a micro instance is not powerful enough to run edx. Try a m1.large instance with at least 50gb of hard drive space.

[disisid]

Its working now actually. I am running it on a t1.micro although I have
increased the EBS volume to 30 GB.
Although the performance is a bit compromised. It is live here:
http://54.254.210.163:18010/

On Mon, Dec 9, 2013 at 10:14 PM, Adam Straubel notifications@github.comwrote:

I'm not sure if you figured this problem out, but a micro instance is not
powerful enough to run edx. Try a m1.large instance with at least 50gb of
hard drive space.

—
Reply to this email directly or view it on GitHubhttps://github.com/edx/edx-platform/issues/1809#issuecomment-30148215
.

[feanil]

Celery as well as elasticsearch have memory requirements that make it difficult to run the whole stack on a t1 micro. The vagrant images suggest 2GB of memory and the same is going to be true of running the whole stack on a single instance.