diff --git a/jetty-io/src/main/java/org/eclipse/jetty/io/ManagedSelector.java b/jetty-io/src/main/java/org/eclipse/jetty/io/ManagedSelector.java
index 0346f4c10e5..f2ffc393fea 100644
--- a/jetty-io/src/main/java/org/eclipse/jetty/io/ManagedSelector.java
+++ b/jetty-io/src/main/java/org/eclipse/jetty/io/ManagedSelector.java
@@ -28,6 +28,7 @@ import java.nio.channels.SelectionKey;
 import java.nio.channels.Selector;
 import java.util.ArrayDeque;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Collections;
 import java.util.Iterator;
 import java.util.List;
@@ -40,6 +41,7 @@ import java.util.concurrent.atomic.AtomicBoolean;
 
 import org.eclipse.jetty.util.component.ContainerLifeCycle;
 import org.eclipse.jetty.util.component.Dumpable;
+import org.eclipse.jetty.util.component.DumpableCollection;
 import org.eclipse.jetty.util.log.Log;
 import org.eclipse.jetty.util.log.Logger;
 import org.eclipse.jetty.util.thread.ExecutionStrategy;
@@ -226,29 +228,23 @@ public class ManagedSelector extends ContainerLifeCycle implements Dumpable
         }
     }
 
-    @Override
-    public String dump()
-    {
-        super.dump();
-        return ContainerLifeCycle.dump(this);
-    }
-
     @Override
     public void dump(Appendable out, String indent) throws IOException
     {
+        super.dump(out, indent);
         Selector selector = _selector;
-        if (selector == null || !selector.isOpen())
-            dumpBeans(out, indent);
-        else
+        if (selector != null && selector.isOpen())
         {
-            final ArrayList<Object> dump = new ArrayList<>(selector.keys().size() * 2);
-            DumpKeys dumpKeys = new DumpKeys(dump);
+            List<Runnable> actions;
+            try (Locker.Lock lock = _locker.lock())
+            {
+                actions = new ArrayList<>(_actions);
+            }
+            List<Object> keys = new ArrayList<>(selector.keys().size());
+            DumpKeys dumpKeys = new DumpKeys(keys);
             submit(dumpKeys);
             dumpKeys.await(5, TimeUnit.SECONDS);
-            if (dump.isEmpty())
-                dumpBeans(out, indent);
-            else
-                dumpBeans(out, indent, dump);
+            dump(out, indent, Arrays.asList(new DumpableCollection("keys", keys), new DumpableCollection("actions", actions)));
         }
     }
 
@@ -512,7 +508,7 @@ public class ManagedSelector extends ContainerLifeCycle implements Dumpable
                     }
                     catch (Throwable x)
                     {
-                        _dumps.add(String.format("SelectionKey@%x[%s]", key.hashCode(), x));
+                        _dumps.add(String.format("SelectionKey@%x[%s]->%s", key.hashCode(), x, key.attachment()));
                     }
                 }
             }
diff --git a/jetty-util/src/main/java/org/eclipse/jetty/util/component/ContainerLifeCycle.java b/jetty-util/src/main/java/org/eclipse/jetty/util/component/ContainerLifeCycle.java
index 5c9d177daf1..7ffc20bedab 100644
--- a/jetty-util/src/main/java/org/eclipse/jetty/util/component/ContainerLifeCycle.java
+++ b/jetty-util/src/main/java/org/eclipse/jetty/util/component/ContainerLifeCycle.java
@@ -660,13 +660,10 @@ public class ContainerLifeCycle extends AbstractLifeCycle implements Container,
         int size = _beans.size();
         for (Collection<?> c : collections)
             size += c.size();
-        if (size == 0)
-            return;
         int i = 0;
         for (Bean b : _beans)
         {
-            i++;
-
+            ++i;
             switch(b._managed)
             {
                 case POJO:
@@ -697,20 +694,15 @@ public class ContainerLifeCycle extends AbstractLifeCycle implements Container,
                     else
                         dumpObject(out, b._bean);
                     break;
-
             }
         }
 
-        if (i<size)
-            out.append(indent).append(" |\n");
-
         for (Collection<?> c : collections)
         {
             for (Object o : c)
             {
                 i++;
                 out.append(indent).append(" +> ");
-
                 if (o instanceof Dumpable)
                     ((Dumpable)o).dump(out, indent + (i == size ? "    " : " |  "));
                 else