Facing Connection Timedout issue in RHEL7 OS while running the collectd-docker image

I am using a collectd docker image and am receiving a timeout error from docker run:

docker run --privileged --net='host' -e 'SF_API_TOKEN=XXXXX' \
   -v /etc/hostname:/mnt/hostname:ro -v /proc:/mnt/proc:ro \
   -v /var/run/docker.sock:/var/run/docker.sock \
   -v /etc:/mnt/etc:ro quay.io/signalfuse/collectd-alpine
[2017-01-31 09:19:40] dogstatsd: dogstatsd port listening not enabled
[2017-01-31 09:19:40] docker : Collecting stats about Docker containers from unix://var/run/docker.sock (API version 1.23; timeout: 3s).
[2017-01-31 09:19:40] Initialization complete, entering read-loop.
[2017-01-31 09:19:40] signalfx-metadata: found host devserver.test123.com
[2017-01-31 09:20:04] signalfx-metadata: unsuccessful response: 
[2017-01-31 09:20:04] signalfx-metadata: adding small dither of 58 seconds before sending notifications
[2017-01-31 09:20:04] plugin_read_thread: read-function of the `python.signalfx_metadata' plugin took 24.074 seconds, which is above its read interval (10.000 seconds). You might want to adjust the `Interval' or `ReadThreads' settings.
[2017-01-31 09:20:28] signalfx-metadata: unsuccessful response: 
[2017-01-31 09:20:28] plugin_read_thread: read-function of the `python.signalfx_metadata' plugin took 24.059 seconds, which is above its read interval (10.000 seconds). You might want to adjust the `Interval' or `ReadThreads' settings.
[2017-01-31 09:20:52] signalfx-metadata: unsuccessful response: 
[2017-01-31 09:20:52] plugin_read_thread: read-function of the `python.signalfx_metadata' plugin took 24.056 seconds, which is above its read interval (10.000 seconds). You might want to adjust the `Interval' or `ReadThreads' settings.
[2017-01-31 09:21:16] signalfx-metadata: unsuccessful response: 

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