diff --git a/src/main/java/io/netty5/buffer/api/pool/MetricUtils.java b/src/main/java/io/netty5/buffer/api/pool/MetricUtils.java
index 1cdb483..2e21da4 100644
--- a/src/main/java/io/netty5/buffer/api/pool/MetricUtils.java
+++ b/src/main/java/io/netty5/buffer/api/pool/MetricUtils.java
@@ -19,7 +19,7 @@ public class MetricUtils {
 		MethodHandle handle = null;
 		try {
 			// Find the class
-			var pooledBufferClass = Class.forName("io.netty5.buffer.api.pool.PooledBufferAllocatorMetricUtils");
+			var pooledBufferClass = Class.forName("io.netty5.buffer.api.pool.PooledBufferAllocatorMetric");
 			// Find the handle of the method
 			handle = lookup.findVirtual(pooledBufferClass, "arenaMetrics", MethodType.methodType(List.class));
 		} catch (NoSuchMethodException | IllegalAccessException | ClassNotFoundException ignored) {
@@ -40,7 +40,7 @@ public class MetricUtils {
 			// Invoke the method to get the metrics
 			return (List<PoolArenaMetric>) GET_ARENA_METRICS.invoke(metric);
 		} catch (Throwable e) {
-			throw new RuntimeException(e);
+			return List.of();
 		}
 	}
 }
diff --git a/src/main/java/it/cavallium/dbengine/netty/JMXNettyMonitoringManager.java b/src/main/java/it/cavallium/dbengine/netty/JMXNettyMonitoringManager.java
index a858586..fb1b878 100644
--- a/src/main/java/it/cavallium/dbengine/netty/JMXNettyMonitoringManager.java
+++ b/src/main/java/it/cavallium/dbengine/netty/JMXNettyMonitoringManager.java
@@ -39,20 +39,20 @@ public class JMXNettyMonitoringManager {
 		return instance;
 	}
 
-	public void register(String name, BufferAllocator metric) {
+	public void register(String name, BufferAllocator allocator) {
 		try {
 			name = name.replaceAll("[^\\p{IsAlphabetic}\\p{IsDigit}_]", "_");
 			String type;
 			StandardMBean mbean;
-			if (metric instanceof PooledBufferAllocator pooledMetric) {
-				for (var arenaMetric : MetricUtils.getPoolArenaMetrics(pooledMetric)) {
-					String arenaType = pooledMetric.isDirectBufferPooled() ? "direct" : "heap";
+			if (allocator instanceof PooledBufferAllocator pooledAllocator) {
+				for (var arenaMetric : MetricUtils.getPoolArenaMetrics(pooledAllocator)) {
+					String arenaType = pooledAllocator.isDirectBufferPooled() ? "direct" : "heap";
 					var jmx = new JMXPoolArenaNettyMonitoring(arenaMetric);
 					mbean = new StandardMBean(jmx, JMXPoolArenaNettyMonitoringMBean.class);
 					ObjectName botObjectName = new ObjectName("io.netty.stats:name=PoolArena,type=" + arenaType + ",arenaId=" + nextArenaId.getAndIncrement());
 					platformMBeanServer.registerMBean(mbean, botObjectName);
 				}
-				var jmx = new JMXPooledNettyMonitoring(name, pooledMetric);
+				var jmx = new JMXPooledNettyMonitoring(name, pooledAllocator);
 				type = "pooled";
 				mbean = new StandardMBean(jmx, JMXNettyMonitoringMBean.class);