newrelic agent is not sending data to newrelic servers at staging only

Question

I have a new relic agent configured like so:

newrelic==2.56.0.42

    newrelic.agent.initialize(newrelic_ini_file, newrelic_env)
    logging.info('NewRelic initialized with newrelic_env '+repr(newrelic_env))
    logging.info('NewRelic config name is '+repr(newrelic.agent.application().name))

It's logging the "right" things in staging, but it's not sending.

 NewRelic initialized with newrelic_env 'staging'
 NewRelic config name is 'My Service (Staging)'

The agents send data from localhost and production.

This is some configs from the newrelic.ini file

[newrelic]
license_key = xxxxx
app_name = My Service
monitor_mode = true
log_file = /tmp/newrelic-python-agent.log
log_level = info

This is my staging config in newrelic.ini

[newrelic:staging]
app_name = My Service (Staging)
monitor_mode = true
log_level = debug

One log that I think is suspicious is this

(14/NR-Harvest-Thread) newrelic.core.agent DEBUG - Completed harvest of all application data in 0.00 seconds.

I think the agent not collecting any data due to the 0.00 seconds part.

What debug logs should I look for, for validating actual data being sent and received 200 from new relic.

Additional details: staging is running on Docker alpine:3.6

Answer 1

The clue to the answer was indeed the debug log of harvest of all application data in 0.00 seconds.

apparently, newrelic.agent.initialize has to go BEFORE app = Flask(__name__). Moved before and it started sending.