SmallRye Metrics - MetricsRegistryImpl - removal of entry from map which is currently iterated ---------------------------------------------------------------------------------------------- Key: WFLY-12970 URL: https://issues.redhat.com/browse/WFLY-12970 Project: WildFly Issue Type: Bug Components: MP Metrics Reporter: Rostislav Svoboda Assignee: Jason Lee Priority: Major SmallRye Metrics - MetricsRegistryImpl - removal of entry from map which is currently iterated https://github.com/smallrye/smallrye-metrics/blob/master/implementation/s... Method {{removeMatching}} is iterating over {{metricMap}}. If there is a match {{remove}} method is called. This method removes entry from {{metricMap}} and from {{metadataMap}}. I don't like the fact that the entry is removed from the map by external method while the map is currently iterated by the {{removeMatching}} method. I think https://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html#remove-- should be called in {{removeMatching}} for {{metricMap}} entry + invocation of metadataMap.remove(entry.getKey()) + log mesasge;