Hi, Looking at the source code where this error comes from it seems it is related to Tomee Microprofile.
The error occurs when multiple apps are deployed, I have not been able yet to find what attributes the apps need to have to casue this error. Met Vriendelijke Groet / With Kind Regards Bart van Leeuwen From: "Bart van Leeuwen" <bart_van_leeu...@netage.nl> To: users@tomee.apache.org Date: 26-10-2023 12:59 Subject: SEVERE - Can't initialize Metrics Registrar Hi, When deploying an app on Tomee 9.1.1 I get the following error on the console: SEVERE - Can't initialize Metrics Registrar: SRMET00009: Gauge with id MetricID{name='classloader.loadedClasses.count', tags=[]} already exists The app is a war which contains a MessageDriven class I'm not using any of the metrics etc, nor can I find information about this error. The app works without any issues. Thanks in advance, Met Vriendelijke Groet / With Kind Regards Bart van Leeuwen