If APMSQL server is used when this property is disabled, you will experience the following errors.
Error: TEIID30504 Remote org.teiid.core.TeiidProcessingException: TEIID30504 ws-source: TEIID15005 Error Calling HTTP Service - 500 Internal Server Error
MOM EM log
[ERROR] [btpool0-1] [Manager.AppMap] Internal Server Error happend during controller invocation!
Setting introscope.apm.feature.enabled=false disables the AppMap API which APMSQL uses to gather data from the Enterprise Manager.
The property must not be set to false on any member of the cluster, otherwise no data can be returned.