Only first agent expression in a management module are considered to match metrics in preview and alerts

Products

• CA Application Performance Management (APM / Wily / Introscope)

Issue/Introduction

We are observing issue with the preview in metric grouping. Preview sometime shows nothing as some relevant metrics match other agent expressions (not the first one in the list). We create a Management Module with 3 Agent Expression. Then create a metric grouping and select "Use Management Module Agent Expression".  We see that in the preview the only metrics are listed that match first Agent Expression. It seems alerts are also having same issue where alerts are not being sent for the other Agent Expression beside first one. 

Environment

Release : 20.2

Component : Introscope

Resolution

This issue is fixed and the fix will be released in 21.10 release of APM SAAS.