Updates to Log4j2Metrics from code review

Signed-off-by: Patrik Ivarsson <[email protected]>

Author: pativa

micrometer-core/src/main/java/io/micrometer/core/instrument/binder/logging/Log4j2Metrics.java

@@ -89,7 +89,9 @@ public void bindTo(MeterRegistry registry) {
 
         PropertyChangeListener changeListener = listener -> {
             if (listener.getNewValue() instanceof Configuration && listener.getOldValue() != listener.getNewValue()) {
-                registerMetricsFilter((Configuration) listener.getNewValue(), registry);
+                Configuration newConfiguration = (Configuration) listener.getNewValue();
+                registerMetricsFilter(newConfiguration, registry);
+                loggerContext.updateLoggers(newConfiguration);
                 if (listener.getOldValue() instanceof Configuration) {
                     removeMetricsFilter((Configuration) listener.getOldValue());
                 }
@@ -138,13 +140,15 @@ private MetricsFilter getOrCreateMetricsFilterAndStart(MeterRegistry registry) {
     @Override
     public void close() {
         changeListeners.forEach(loggerContext::removePropertyChangeListener);
+        changeListeners.clear();
 
         if (!metricsFilters.isEmpty()) {
             Configuration configuration = loggerContext.getConfiguration();
             removeMetricsFilter(configuration);
             loggerContext.updateLoggers(configuration);
 
             metricsFilters.values().forEach(MetricsFilter::stop);
+            metricsFilters.clear();
         }
     }