这台服务器曾经部署过另一个new relic license key的应用
部署新的应用时，debug log显示正在使用另一个应用的license
配置代码如下
common: &default_settings
# Required license key associated with your New Relic account.
license_key: '25905xxxxxxxxxxxxx04b6'
# Your application name. Renaming here affects where data displays in New
# Relic. For more details, see https://docs.newrelic.com/docs/apm/new-relic-apm/maintenance/renaming-applications
app_name: 'xxx sandbox'
# To disable the agent regardless of other settings, uncomment the following:
# agent_enabled: false
# Logging level for log/newrelic_agent.log
log_level: debug
# Environment-specific settings are in this section.
# RAILS_ENV or RACK_ENV (as appropriate) is used to determine the environment.
# If your application has other named environments, configure them here.
development:
<<: *default_settings
app_name: 'xxx (Development)'
test:
<<: *default_settings
# It doesn't make sense to report to New Relic from automated test runs.
monitor_mode: false
staging:
<<: *default_settings
app_name: 'xxx (Staging)'
输出log如下（有时使用配置中的license，有时使用另一个应用的license）
[2017-04-27 22:24:55 -0700 sandbox.aviagames.com (1183)] DEBUG : Sending request to collector-213.newrelic.com:443/agent_listener/14/7424fbxxxxxxxxxxxxx4bd/get_agent_commands?run_id=216855451632610815&marshal_format=json with POST
[2017-04-27 22:24:55 -0700 sandbox.aviagames.com (1183)] DEBUG : Received response, status: 200, encoding: ''
[2017-04-27 22:24:55 -0700 sandbox.aviagames.com (1183)] DEBUG : Received get_agent_commands = []
[2017-04-27 22:24:55 -0700 sandbox.aviagames.com (1183)] DEBUG : No thread profiles with data found to send.
[2017-04-27 22:24:55 -0700 sandbox.aviagames.com (1183)] DEBUG : EventLoop: Dispatching event 'report_event_data' with 1 callback(s).
[2017-04-27 22:24:55 -0700 sandbox.aviagames.com (1183)] DEBUG : Sending analytic_event_data to New Relic Service
[2017-04-27 22:24:55 -0700 sandbox.aviagames.com (1183)] DEBUG : EventLoop: Dispatching event 'reset_log_once_keys' with 1 callback(s).
[2017-04-27 22:25:20 -0700 sandbox.aviagames.com (1103)] DEBUG : EventLoop: Dispatching event 'report_data' with 1 callback(s).
[2017-04-27 22:25:20 -0700 sandbox.aviagames.com (1103)] DEBUG : Sending data to New Relic Service
[2017-04-27 22:25:20 -0700 sandbox.aviagames.com (1103)] DEBUG : Sending 31 items to metric_data
[2017-04-27 22:25:20 -0700 sandbox.aviagames.com (1103)] DEBUG : Sending request to collector-252.newrelic.com:443/agent_listener/14/25905dxxxxxxx04b6/metric_data?run_id=201836671014945180&marshal_format=json with POST
之前的工作人员在这台机器上设置了环境变量，newrelic默认优先使用环境变量中的license等值，修改了环境变量并重启系统后问题就解决了