1.16 Migration Guide

We have upgraded to the Prometheus Java client 1.4.x, which brings support for Unicode - see here. The : character was previously sanitized to _ for meter names and tag names in the default PrometheusNamingConvention, but it no longer is since version 1.4.0 of the Prometheus Java client. If you rely on this behavior, you can configure a custom implementation of PrometheusNamingConvention that restores the sanitization behavior for :.