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New question #195886 on Graphite:
https://answers.launchpad.net/graphite/+question/195886

I have Graphite setup on three instances on EC2:

* carbon-relay - relay1.graphite.prod.example.ec2
* carbon-cache + webapp - cache3.graphite.prod.example.ec2
* carbon-cache + webapp - cache4.graphite.prod.example.ec2

The relay is working perfectly with consistent-hashing. The problem is the two web servers are not communicating with each other, so I only see the metrics from one server. 

I spent a lot of time looking at https://answers.launchpad.net/graphite/+question/114206 and I can't figure out what I have setup incorrectly. I can run a wget from cache3 against cache4, get data back and see it in the Apache logs. So I don't think it's a firewall issue. I tried enabling "suppressError = False" in remote_storage.py and turned on DEBUG in local_settings.py, but I don't see any errors in Firebug.

cache3 - local_settings.py
CLUSTER_SERVERS = [ 'cache4.graphite.prod.example.ec2', 'localhost' ]

cache4 - local_settings.py
CLUSTER_SERVERS = [ 'cache3.graphite.prod.example.ec2', 'localhost' ]

I have tried using IP addresses as well and that had no impact. Any suggestions?

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