High CPU usage by the Redis and Sensorservices on the primary (master) server.
The /var/log/cb/nginx/sensor.access.log is filled with 499, 502 and 504 failure codes
The issue may have coincided with a large number of sensor upgrades or new installs of 7.x sensors.
Live-response may also be slow and timeout
Environment
EDR Server: 7.2.0 and 7.3.0
Cause
This is issue CB-33260. At each check-in, sensorservices will check the Redis keys. When there are many keys and Live Query is enabled, this can slow down the call for check-ins
Resolution
Please disable Live Query if you are experiencing this issue.