[FLINK-33429] Metric collection during stabilization phase may error due to missing metrics

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: kubernetes-operator-1.7.0
• Fix Version/s: kubernetes-operator-1.7.0
• Component/s: Autoscaler
• Labels: pull-request-available
• Assignee: Maximilian Michels
• Reporter: Maximilian Michels
• Created: 01/Nov/23 14:08
• Updated: 03/Nov/23 15:59
• Resolved: 03/Nov/23 14:44

Description

The new code for the 1.7.0 release introduces metric collection during the stabilization phase to allow sampling the observed true processing rate. Metrics might not be fully initialized during that phase, as evident through the error metrics. The following error is thrown:

java.lang.RuntimeException: Could not find required metric NUM_RECORDS_OUT_PER_SEC for 667f5d5aa757fb217b92c06f0f5d2bf2 

To prevent these errors shadowing actual errors, we should detect and ignore this recoverable exception.

Issue Links

• links to: GitHub Pull Request #699