Missing Siteminder metrics on small number of hosts

Products

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

Issue/Introduction

We recently undertook a reinstall of our Siteminder infrastructure, upgrading from 12.8.05 to 12.8.07. As part of the work, APM for Siteminder was reinstalled after the Siteminder product installer was run.  We've successfully completely and confirmed in several states, and other Production services, but have 8 hosts that do not return Siteminder metrics (though do return other EPAgent-provided metrics).

Service layout: 2 datacentres, 16 hosts per datacentre - 1/2 of one DC having issues.  

I've attempted:

• enabled debug logs for both EPAgent and APM, but don't seem to see any glaring issues.
• reinstallation of epagent
• reinstallation of APM for Siteminder

However I am still not seeing the metrics in Introscope Investigator

Environment

APM 10.8 with APM for SSO 12.8.07

Resolution

Following the Configuration section of the below techdocs link resolved the issue

Configuration

Missing Siteminder metrics on small number of hosts