Issue
After you scale out the machines, the metric data about the requests, errors, and exceptions of a machine is missing whereas other metric data such as JVM data is normal.
Solution
Check whether the JVM memory usage and CPU utilization of the machine are significantly lower than those of other machines.
If the JVM memory usage and CPU utilization of the machine are significantly lower, check whether all the scale-out configurations are valid. For example, check whether the SLB settings are configured as expected.
Metric data about requests may be missing because the machine has no traffic.
If the resource usage of the machine is normal, contact technical support.