Shutdown Executor on MultithreadEventLoopGroup shutdown. Fixes #2837

Motivation:

Currently the Executor created by (Nio|Epoll)EventLoopGroup is not correctly shutdown.
This might lead to resource shortages, due to resources not being freed asap.

Modifications:

If (Nio|Epoll)EventLoopGroup create their internal Executor via a constructor
provided `ExecutorServiceFactory` object or via
MultithreadEventLoopGroup.newDefaultExecutorService(...) the ExecutorService.shutdown()
method will be called after (Nio|Epoll)EventLoopGroup is shutdown.

ExecutorService.shutdown() will not be called if the Executor object was passed
to the (Nio|Epoll)EventLoopGroup (that is, it was instantiated outside of Netty).

Result:

Correctly release resources on (Nio|Epoll)EventLoopGroup shutdown.

common/src/main/java/io/netty/util/concurrent/DefaultEventExecutor.java

@@ -32,7 +32,7 @@ public final class DefaultEventExecutor extends SingleThreadEventExecutor {
     }
 
     public DefaultEventExecutor(EventExecutorGroup parent) {
-        this(parent, new DefaultExecutorFactory(DefaultEventExecutor.class).newExecutor(1));
+        this(parent, new DefaultExecutorServiceFactory(DefaultEventExecutor.class).newExecutorService(1));
     }
 
     public DefaultEventExecutor(EventExecutorGroup parent, Executor executor) {

common/src/main/java/io/netty/util/concurrent/DefaultEventExecutorGroup.java

@@ -47,11 +47,11 @@ public class DefaultEventExecutorGroup extends MultithreadEventExecutorGroup {
      * Create a new instance.
      *
      * @param nEventExecutors   the number of {@link DefaultEventExecutor}s that this group will use.
-     * @param executorFactory   the {@link ExecutorFactory} which produces the {@link Executor} responsible for
+     * @param executorServiceFactory   the {@link ExecutorServiceFactory} which produces the {@link Executor}
-     *                          executing the work handled by this {@link EventExecutorGroup}.
+     *                                 responsible for executing the work handled by this {@link EventExecutorGroup}.
      */
-    public DefaultEventExecutorGroup(int nEventExecutors, ExecutorFactory executorFactory) {
+    public DefaultEventExecutorGroup(int nEventExecutors, ExecutorServiceFactory executorServiceFactory) {
-        super(nEventExecutors, executorFactory);
+        super(nEventExecutors, executorServiceFactory);
     }
 
     @Override

common/src/main/java/io/netty/util/concurrent/DefaultExecutorServiceFactory.java

@@ -27,13 +27,14 @@ import io.netty.util.internal.logging.InternalLoggerFactory;
 import java.lang.Thread.UncaughtExceptionHandler;
 import java.util.Locale;
 import java.util.concurrent.Executor;
+import java.util.concurrent.ExecutorService;
 import java.util.concurrent.atomic.AtomicInteger;
 
 /**
- * An implementation of an {@link ExecutorFactory} that creates a new {@link ForkJoinPool} on each
+ * An implementation of an {@link ExecutorServiceFactory} that creates a new {@link ForkJoinPool} on each
- * call to {@link #newExecutor(int)}.
+ * call to {@link #newExecutorService(int)}.
  * <p>
- * This {@link ExecutorFactory} powers Netty's nio and epoll eventloops by default. Netty moved from managing its
+ * This {@link ExecutorServiceFactory} powers Netty's nio and epoll eventloops by default. Netty moved from managing its
  * own threads and pinning a thread to each eventloop to an {@link Executor}-based approach. That way advanced
  * users of Netty can plug in their own threadpools and gain more control of scheduling the eventloops.
  * <p>
@@ -43,10 +44,10 @@ import java.util.concurrent.atomic.AtomicInteger;
  * The whole discussion can be found on GitHub
  * <a href="https://github.com/netty/netty/issues/2250">https://github.com/netty/netty/issues/2250</a>.
  */
-public final class DefaultExecutorFactory implements ExecutorFactory {
+public final class DefaultExecutorServiceFactory implements ExecutorServiceFactory {
 
     private static final InternalLogger logger =
-            InternalLoggerFactory.getInstance(DefaultExecutorFactory.class);
+            InternalLoggerFactory.getInstance(DefaultExecutorServiceFactory.class);
 
     private static final AtomicInteger executorId = new AtomicInteger();
     private final String namePrefix;
@@ -55,19 +56,19 @@ public final class DefaultExecutorFactory implements ExecutorFactory {
      * @param clazzNamePrefix   the name of the class will be used to prefix the name of each
      *                          {@link ForkJoinWorkerThread} with.
      */
-    public DefaultExecutorFactory(Class<?> clazzNamePrefix) {
+    public DefaultExecutorServiceFactory(Class<?> clazzNamePrefix) {
         this(toName(clazzNamePrefix));
     }
 
     /**
      * @param namePrefix    the string to prefix the name of each {@link ForkJoinWorkerThread} with.
      */
-    public DefaultExecutorFactory(String namePrefix) {
+    public DefaultExecutorServiceFactory(String namePrefix) {
         this.namePrefix = namePrefix;
     }
 
     @Override
-    public Executor newExecutor(int parallelism) {
+    public ExecutorService newExecutorService(int parallelism) {
         ForkJoinWorkerThreadFactory threadFactory =
                 new DefaultForkJoinWorkerThreadFactory(namePrefix + '-' + executorId.getAndIncrement());
 

common/src/main/java/io/netty/util/concurrent/ExecutorServiceFactory.java

@@ -16,12 +16,12 @@
 
 package io.netty.util.concurrent;
 
-import java.util.concurrent.Executor;
+import java.util.concurrent.ExecutorService;
 
 /**
- * An object that creates new {@link Executor}s on demand. Using executor factories mainly
+ * An object that creates new {@link ExecutorService} on demand. Using an {@link ExecutorServiceFactory} mainly
- * simplifies providing custom executor implementations to Netty's event loops.
+ * simplifies providing a custom {@link ExecutorService} implementation to Netty's event loops.
  */
-public interface ExecutorFactory {
+public interface ExecutorServiceFactory {
-    Executor newExecutor(int parallelism);
+    ExecutorService newExecutorService(int parallelism);
 }

common/src/main/java/io/netty/util/concurrent/FastThreadLocal.java

@@ -31,7 +31,7 @@ import java.util.Set;
  * table, and it is useful when accessed frequently.
  * </p><p>
  * To take advantage of this thread-local variable, your thread must implement {@link FastThreadLocalAccess}.
- * By default, all threads created by {@link DefaultThreadFactory} and {@link DefaultExecutorFactory} implement
+ * By default, all threads created by {@link DefaultThreadFactory} and {@link DefaultExecutorServiceFactory} implement
  * {@link FastThreadLocalAccess}.
  * </p><p>
  * Note that the fast path is only possible on threads that implement {@link FastThreadLocalAccess}, because it

common/src/main/java/io/netty/util/concurrent/MultithreadEventExecutorGroup.java

@@ -19,6 +19,7 @@ import java.util.Collections;
 import java.util.LinkedHashSet;
 import java.util.Set;
 import java.util.concurrent.Executor;
+import java.util.concurrent.ExecutorService;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicInteger;
 
@@ -41,11 +42,17 @@ public abstract class MultithreadEventExecutorGroup extends AbstractEventExecuto
      *                                  requested from the default executor. It is generally advised for the number
      *                                  of {@link EventExecutor}s and the number of {@link Thread}s used by the
      *                                  {@code executor} to lie very close together.
-     * @param executorFactory   the {@link ExecutorFactory} to use, or {@code null} if the default should be used.
+     * @param executorServiceFactory    the {@link ExecutorServiceFactory} to use, or {@code null} if the default
-     * @param args                arguments which will passed to each {@link #newChild(Executor, Object...)} call
+     *                                  should be used.
+     * @param args                      arguments which will passed to each {@link #newChild(Executor, Object...)} call.
      */
-    protected MultithreadEventExecutorGroup(int nEventExecutors, ExecutorFactory executorFactory, Object... args) {
+    protected MultithreadEventExecutorGroup(int nEventExecutors,
-        this(nEventExecutors, executorFactory == null ? null : executorFactory.newExecutor(nEventExecutors), args);
+                                            ExecutorServiceFactory executorServiceFactory,
+                                            Object... args) {
+        this(nEventExecutors, executorServiceFactory != null
+                                ? executorServiceFactory.newExecutorService(nEventExecutors)
+                                : null,
+             true, args);
     }
 
     /**
@@ -58,13 +65,21 @@ public abstract class MultithreadEventExecutorGroup extends AbstractEventExecuto
      * @param args              arguments which will passed to each {@link #newChild(Executor, Object...)} call
      */
     protected MultithreadEventExecutorGroup(int nEventExecutors, Executor executor, Object... args) {
+        this(nEventExecutors, executor, false, args);
+    }
+
+    private MultithreadEventExecutorGroup(int nEventExecutors,
+                                          Executor executor,
+                                          boolean shutdownExecutor,
+                                          Object... args) {
         if (nEventExecutors <= 0) {
             throw new IllegalArgumentException(
                     String.format("nEventExecutors: %d (expected: > 0)", nEventExecutors));
         }
 
         if (executor == null) {
-            executor = newDefaultExecutor(nEventExecutors);
+            executor = newDefaultExecutorService(nEventExecutors);
+            shutdownExecutor = true;
         }
 
         children = new EventExecutor[nEventExecutors];
@@ -104,11 +119,18 @@ public abstract class MultithreadEventExecutorGroup extends AbstractEventExecuto
             }
         }
 
+        final boolean shutdownExecutor0 = shutdownExecutor;
+        final Executor executor0 = executor;
         final FutureListener<Object> terminationListener = new FutureListener<Object>() {
             @Override
             public void operationComplete(Future<Object> future) throws Exception {
                 if (terminatedChildren.incrementAndGet() == children.length) {
                     terminationFuture.setSuccess(null);
+                    if (shutdownExecutor0) {
+                        // This cast is correct because shutdownExecutor0 is only try if
+                        // executor0 is of type ExecutorService.
+                        ((ExecutorService) executor0).shutdown();
+                    }
                 }
             }
         };
@@ -122,8 +144,8 @@ public abstract class MultithreadEventExecutorGroup extends AbstractEventExecuto
         readonlyChildren = Collections.unmodifiableSet(childrenSet);
     }
 
-    protected Executor newDefaultExecutor(int nEventExecutors) {
+    protected ExecutorService newDefaultExecutorService(int nEventExecutors) {
-        return new DefaultExecutorFactory(getClass()).newExecutor(nEventExecutors);
+        return new DefaultExecutorServiceFactory(getClass()).newExecutorService(nEventExecutors);
     }
 
     @Override

common/src/test/java/io/netty/util/concurrent/DefaultPromiseTest.java

@@ -177,7 +177,7 @@ public class DefaultPromiseTest {
 
     private static final class TestEventExecutor extends SingleThreadEventExecutor {
         TestEventExecutor() {
-            super(null, new DefaultExecutorFactory(TestEventExecutor.class).newExecutor(1), true);
+            super(null, new DefaultExecutorServiceFactory(TestEventExecutor.class).newExecutorService(1), true);
         }
 
         @Override

common/src/test/java/io/netty/util/concurrent/FastThreadLocalTest.java

@@ -79,15 +79,15 @@ public class FastThreadLocalTest {
     }
 
     /**
-     * Make sure threads created by the {@link DefaultExecutorFactory} and {@link DefaultThreadFactory}
+     * Make sure threads created by the {@link DefaultExecutorServiceFactory} and {@link DefaultThreadFactory}
      * implement the {@link FastThreadLocalAccess} interface.
      */
     @Test
     public void testIsFastThreadLocalThread() {
-        ExecutorFactory executorFactory = new DefaultExecutorFactory(FastThreadLocalTest.class);
+        ExecutorServiceFactory executorServiceFactory = new DefaultExecutorServiceFactory(FastThreadLocalTest.class);
         int parallelism = Runtime.getRuntime().availableProcessors() * 2;
 
-        Executor executor = executorFactory.newExecutor(parallelism);
+        Executor executor = executorServiceFactory.newExecutorService(parallelism);
         // submit a "high" number of tasks, to get a good chance to touch every thread.
         for (int i = 0; i < parallelism * 100; i++) {
             executor.execute(new Runnable() {

example/src/main/java/io/netty/example/udt/echo/bytes/ByteEchoClient.java

@@ -23,8 +23,8 @@ import io.netty.channel.udt.UdtChannel;
 import io.netty.channel.udt.nio.NioUdtProvider;
 import io.netty.handler.logging.LogLevel;
 import io.netty.handler.logging.LoggingHandler;
-import io.netty.util.concurrent.DefaultExecutorFactory;
+import io.netty.util.concurrent.DefaultExecutorServiceFactory;
-import io.netty.util.concurrent.ExecutorFactory;
+import io.netty.util.concurrent.ExecutorServiceFactory;
 
 /**
  * UDT Byte Stream Client
@@ -42,7 +42,7 @@ public final class ByteEchoClient {
 
     public static void main(String[] args) throws Exception {
         // Configure the client.
-        final ExecutorFactory connectFactory = new DefaultExecutorFactory("connect");
+        final ExecutorServiceFactory connectFactory = new DefaultExecutorServiceFactory("connect");
         final NioEventLoopGroup connectGroup =
                 new NioEventLoopGroup(1, connectFactory, NioUdtProvider.BYTE_PROVIDER);
 

example/src/main/java/io/netty/example/udt/echo/bytes/ByteEchoServer.java

@@ -24,8 +24,8 @@ import io.netty.channel.udt.UdtChannel;
 import io.netty.channel.udt.nio.NioUdtProvider;
 import io.netty.handler.logging.LogLevel;
 import io.netty.handler.logging.LoggingHandler;
-import io.netty.util.concurrent.DefaultExecutorFactory;
+import io.netty.util.concurrent.DefaultExecutorServiceFactory;
-import io.netty.util.concurrent.ExecutorFactory;
+import io.netty.util.concurrent.ExecutorServiceFactory;
 
 /**
  * UDT Byte Stream Server
@@ -37,8 +37,8 @@ public final class ByteEchoServer {
     static final int PORT = Integer.parseInt(System.getProperty("port", "8007"));
 
     public static void main(String[] args) throws Exception {
-        ExecutorFactory acceptFactory = new DefaultExecutorFactory("accept");
+        ExecutorServiceFactory acceptFactory = new DefaultExecutorServiceFactory("accept");
-        ExecutorFactory connectFactory = new DefaultExecutorFactory("connect");
+        ExecutorServiceFactory connectFactory = new DefaultExecutorServiceFactory("connect");
         NioEventLoopGroup acceptGroup = new NioEventLoopGroup(1, acceptFactory, NioUdtProvider.BYTE_PROVIDER);
         NioEventLoopGroup connectGroup = new NioEventLoopGroup(1, connectFactory, NioUdtProvider.BYTE_PROVIDER);
 

example/src/main/java/io/netty/example/udt/echo/message/MsgEchoClient.java

@@ -23,8 +23,8 @@ import io.netty.channel.udt.UdtChannel;
 import io.netty.channel.udt.nio.NioUdtProvider;
 import io.netty.handler.logging.LogLevel;
 import io.netty.handler.logging.LoggingHandler;
-import io.netty.util.concurrent.DefaultExecutorFactory;
+import io.netty.util.concurrent.DefaultExecutorServiceFactory;
-import io.netty.util.concurrent.ExecutorFactory;
+import io.netty.util.concurrent.ExecutorServiceFactory;
 
 import java.util.logging.Logger;
 
@@ -46,7 +46,7 @@ public final class MsgEchoClient {
 
     public static void main(String[] args) throws Exception {
         // Configure the client.
-        final ExecutorFactory connectFactory = new DefaultExecutorFactory("connect");
+        final ExecutorServiceFactory connectFactory = new DefaultExecutorServiceFactory("connect");
         final NioEventLoopGroup connectGroup =
                 new NioEventLoopGroup(1, connectFactory, NioUdtProvider.MESSAGE_PROVIDER);
 

example/src/main/java/io/netty/example/udt/echo/message/MsgEchoServer.java

@@ -24,8 +24,8 @@ import io.netty.channel.udt.UdtChannel;
 import io.netty.channel.udt.nio.NioUdtProvider;
 import io.netty.handler.logging.LogLevel;
 import io.netty.handler.logging.LoggingHandler;
-import io.netty.util.concurrent.DefaultExecutorFactory;
+import io.netty.util.concurrent.DefaultExecutorServiceFactory;
-import io.netty.util.concurrent.ExecutorFactory;
+import io.netty.util.concurrent.ExecutorServiceFactory;
 
 /**
  * UDT Message Flow Server
@@ -37,8 +37,8 @@ public final class MsgEchoServer {
     static final int PORT = Integer.parseInt(System.getProperty("port", "8007"));
 
     public static void main(String[] args) throws Exception {
-        final ExecutorFactory acceptFactory = new DefaultExecutorFactory("accept");
+        final ExecutorServiceFactory acceptFactory = new DefaultExecutorServiceFactory("accept");
-        final ExecutorFactory connectFactory = new DefaultExecutorFactory("connect");
+        final ExecutorServiceFactory connectFactory = new DefaultExecutorServiceFactory("connect");
         final NioEventLoopGroup acceptGroup =
                 new NioEventLoopGroup(1, acceptFactory, NioUdtProvider.MESSAGE_PROVIDER);
         final NioEventLoopGroup connectGroup =

example/src/main/java/io/netty/example/udt/echo/rendezvous/MsgEchoPeerBase.java

@@ -23,8 +23,8 @@ import io.netty.channel.udt.UdtChannel;
 import io.netty.channel.udt.nio.NioUdtProvider;
 import io.netty.handler.logging.LogLevel;
 import io.netty.handler.logging.LoggingHandler;
-import io.netty.util.concurrent.DefaultExecutorFactory;
+import io.netty.util.concurrent.DefaultExecutorServiceFactory;
-import io.netty.util.concurrent.ExecutorFactory;
+import io.netty.util.concurrent.ExecutorServiceFactory;
 
 import java.net.InetSocketAddress;
 
@@ -48,7 +48,7 @@ public abstract class MsgEchoPeerBase {
 
     public void run() throws Exception {
         // Configure the peer.
-        final ExecutorFactory connectFactory = new DefaultExecutorFactory("rendezvous");
+        final ExecutorServiceFactory connectFactory = new DefaultExecutorServiceFactory("rendezvous");
         final NioEventLoopGroup connectGroup =
                 new NioEventLoopGroup(1, connectFactory, NioUdtProvider.MESSAGE_PROVIDER);
 

example/src/main/java/io/netty/example/udt/echo/rendezvousBytes/ByteEchoPeerBase.java

@@ -23,8 +23,8 @@ import io.netty.channel.udt.UdtChannel;
 import io.netty.channel.udt.nio.NioUdtProvider;
 import io.netty.handler.logging.LogLevel;
 import io.netty.handler.logging.LoggingHandler;
-import io.netty.util.concurrent.DefaultExecutorFactory;
+import io.netty.util.concurrent.DefaultExecutorServiceFactory;
-import io.netty.util.concurrent.ExecutorFactory;
+import io.netty.util.concurrent.ExecutorServiceFactory;
 
 import java.net.SocketAddress;
 
@@ -50,7 +50,7 @@ public class ByteEchoPeerBase {
     }
 
     public void run() throws Exception {
-        final ExecutorFactory connectFactory = new DefaultExecutorFactory("rendezvous");
+        final ExecutorServiceFactory connectFactory = new DefaultExecutorServiceFactory("rendezvous");
         final NioEventLoopGroup connectGroup =
                 new NioEventLoopGroup(1, connectFactory, NioUdtProvider.BYTE_PROVIDER);
 

testsuite/src/test/java/io/netty/testsuite/transport/sctp/SctpTestPermutation.java

@@ -27,7 +27,7 @@ import io.netty.channel.sctp.oio.OioSctpServerChannel;
 import io.netty.testsuite.util.TestUtils;
 import io.netty.testsuite.transport.TestsuitePermutation.BootstrapComboFactory;
 import io.netty.testsuite.transport.TestsuitePermutation.BootstrapFactory;
-import io.netty.util.concurrent.DefaultExecutorFactory;
+import io.netty.util.concurrent.DefaultExecutorServiceFactory;
 import io.netty.util.concurrent.DefaultThreadFactory;
 
 import java.util.ArrayList;
@@ -39,9 +39,9 @@ public final class SctpTestPermutation {
     private static final int BOSSES = 2;
     private static final int WORKERS = 3;
     private static final EventLoopGroup nioBossGroup =
-            new NioEventLoopGroup(BOSSES, new DefaultExecutorFactory("testsuite-sctp-nio-boss"));
+            new NioEventLoopGroup(BOSSES, new DefaultExecutorServiceFactory("testsuite-sctp-nio-boss"));
     private static final EventLoopGroup nioWorkerGroup =
-            new NioEventLoopGroup(WORKERS, new DefaultExecutorFactory("testsuite-sctp-nio-worker"));
+            new NioEventLoopGroup(WORKERS, new DefaultExecutorServiceFactory("testsuite-sctp-nio-worker"));
     private static final EventLoopGroup oioBossGroup =
             new OioEventLoopGroup(Integer.MAX_VALUE, new DefaultThreadFactory("testsuite-sctp-oio-boss", true));
     private static final EventLoopGroup oioWorkerGroup =

testsuite/src/test/java/io/netty/testsuite/transport/socket/SocketTestPermutation.java

@@ -33,7 +33,7 @@ import io.netty.channel.socket.oio.OioServerSocketChannel;
 import io.netty.channel.socket.oio.OioSocketChannel;
 import io.netty.testsuite.transport.TestsuitePermutation.BootstrapComboFactory;
 import io.netty.testsuite.transport.TestsuitePermutation.BootstrapFactory;
-import io.netty.util.concurrent.DefaultExecutorFactory;
+import io.netty.util.concurrent.DefaultExecutorServiceFactory;
 import io.netty.util.concurrent.DefaultThreadFactory;
 
 import java.util.ArrayList;
@@ -50,9 +50,9 @@ public class SocketTestPermutation {
     protected static final int OIO_SO_TIMEOUT = 10;  // Use short timeout for faster runs.
 
     protected final EventLoopGroup nioBossGroup =
-            new NioEventLoopGroup(BOSSES, new DefaultExecutorFactory("testsuite-nio-boss"));
+            new NioEventLoopGroup(BOSSES, new DefaultExecutorServiceFactory("testsuite-nio-boss"));
     protected final EventLoopGroup nioWorkerGroup =
-            new NioEventLoopGroup(WORKERS, new DefaultExecutorFactory("testsuite-nio-worker"));
+            new NioEventLoopGroup(WORKERS, new DefaultExecutorServiceFactory("testsuite-nio-worker"));
     protected final EventLoopGroup oioBossGroup =
             new OioEventLoopGroup(Integer.MAX_VALUE, new DefaultThreadFactory("testsuite-oio-boss", true));
     protected final EventLoopGroup oioWorkerGroup =

testsuite/src/test/java/io/netty/testsuite/transport/udt/UDTClientServerConnectionTest.java

@@ -32,8 +32,8 @@ import io.netty.handler.codec.Delimiters;
 import io.netty.handler.codec.string.StringDecoder;
 import io.netty.handler.codec.string.StringEncoder;
 import io.netty.util.CharsetUtil;
-import io.netty.util.concurrent.DefaultExecutorFactory;
+import io.netty.util.concurrent.DefaultExecutorServiceFactory;
-import io.netty.util.concurrent.ExecutorFactory;
+import io.netty.util.concurrent.ExecutorServiceFactory;
 import io.netty.util.concurrent.GlobalEventExecutor;
 import org.junit.Test;
 import org.slf4j.Logger;
@@ -65,7 +65,7 @@ public class UDTClientServerConnectionTest {
         @Override
         public void run() {
             final Bootstrap boot = new Bootstrap();
-            final ExecutorFactory clientFactory = new DefaultExecutorFactory("client");
+            final ExecutorServiceFactory clientFactory = new DefaultExecutorServiceFactory("client");
             final NioEventLoopGroup connectGroup =
                     new NioEventLoopGroup(1, clientFactory, NioUdtProvider.BYTE_PROVIDER);
 
@@ -193,8 +193,8 @@ public class UDTClientServerConnectionTest {
         @Override
         public void run() {
             final ServerBootstrap boot = new ServerBootstrap();
-            final ExecutorFactory acceptFactory = new DefaultExecutorFactory("accept");
+            final ExecutorServiceFactory acceptFactory = new DefaultExecutorServiceFactory("accept");
-            final ExecutorFactory serverFactory = new DefaultExecutorFactory("server");
+            final ExecutorServiceFactory serverFactory = new DefaultExecutorServiceFactory("server");
             final NioEventLoopGroup acceptGroup =
                     new NioEventLoopGroup(1, acceptFactory, NioUdtProvider.BYTE_PROVIDER);
             final NioEventLoopGroup connectGroup =

transport-native-epoll/src/main/java/io/netty/channel/epoll/EpollEventLoopGroup.java

@@ -19,10 +19,9 @@ import io.netty.channel.EventLoop;
 import io.netty.channel.EventLoopGroup;
 import io.netty.channel.MultithreadEventLoopGroup;
 import io.netty.util.concurrent.EventExecutor;
-import io.netty.util.concurrent.ExecutorFactory;
+import io.netty.util.concurrent.ExecutorServiceFactory;
 
 import java.util.concurrent.Executor;
-import io.netty.util.concurrent.DefaultExecutorFactory;
 
 
 /**
@@ -35,7 +34,7 @@ public final class EpollEventLoopGroup extends MultithreadEventLoopGroup {
      * Create a new instance that uses twice as many {@link EventLoop}s as there processors/cores
      * available, as well as the default {@link Executor}.
      *
-     * @see DefaultExecutorFactory
+     * @see io.netty.util.concurrent.DefaultExecutorServiceFactory
      */
     public EpollEventLoopGroup() {
         this(0);
@@ -44,7 +43,7 @@ public final class EpollEventLoopGroup extends MultithreadEventLoopGroup {
     /**
      * Create a new instance that uses the default {@link Executor}.
      *
-     * @see DefaultExecutorFactory
+     * @see io.netty.util.concurrent.DefaultExecutorServiceFactory
      *
      * @param nEventLoops   the number of {@link EventLoop}s that will be used by this instance.
      *                      If {@code executor} is {@code null} this number will also be the parallelism
@@ -73,10 +72,11 @@ public final class EpollEventLoopGroup extends MultithreadEventLoopGroup {
      *                      requested from the default executor. It is generally advised for the number
      *                      of {@link EventLoop}s and the number of {@link Thread}s used by the
      *                      {@code executor} to lie very close together.
-     * @param executorFactory   the {@link ExecutorFactory} to use, or {@code null} if the default should be used.
+     * @param executorServiceFactory   the {@link ExecutorServiceFactory} to use, or {@code null} if the
+     *                                 default should be used.
      */
-    public EpollEventLoopGroup(int nEventLoops, ExecutorFactory executorFactory) {
+    public EpollEventLoopGroup(int nEventLoops, ExecutorServiceFactory executorServiceFactory) {
-        this(nEventLoops, executorFactory, 128);
+        this(nEventLoops, executorServiceFactory, 128);
     }
 
     /**
@@ -98,11 +98,12 @@ public final class EpollEventLoopGroup extends MultithreadEventLoopGroup {
      *                      requested from the default executor. It is generally advised for the number
      *                      of {@link EventLoop}s and the number of {@link Thread}s used by the
      *                      {@code executor} to lie very close together.
-     * @param executorFactory   the {@link ExecutorFactory} to use, or {@code null} if the default should be used.
+     * @param executorServiceFactory   the {@link ExecutorServiceFactory} to use, or {@code null} if the default
+     *                                 should be used.
      * @param maxEventsAtOnce   the maximum number of epoll events to handle per epollWait(...).
      */
-    public EpollEventLoopGroup(int nEventLoops, ExecutorFactory executorFactory, int maxEventsAtOnce) {
+    public EpollEventLoopGroup(int nEventLoops, ExecutorServiceFactory executorServiceFactory, int maxEventsAtOnce) {
-        super(nEventLoops, executorFactory, maxEventsAtOnce);
+        super(nEventLoops, executorServiceFactory, maxEventsAtOnce);
     }
 
     /**

transport-native-epoll/src/test/java/io/netty/channel/epoll/EpollSocketTestPermutation.java

@@ -27,7 +27,7 @@ import io.netty.channel.socket.nio.NioSocketChannel;
 import io.netty.testsuite.transport.TestsuitePermutation;
 import io.netty.testsuite.transport.TestsuitePermutation.BootstrapFactory;
 import io.netty.testsuite.transport.socket.SocketTestPermutation;
-import io.netty.util.concurrent.DefaultExecutorFactory;
+import io.netty.util.concurrent.DefaultExecutorServiceFactory;
 
 import java.util.Arrays;
 import java.util.List;
@@ -37,9 +37,9 @@ class EpollSocketTestPermutation extends SocketTestPermutation {
     static final SocketTestPermutation INSTANCE = new EpollSocketTestPermutation();
 
     static final EventLoopGroup EPOLL_BOSS_GROUP =
-            new EpollEventLoopGroup(BOSSES, new DefaultExecutorFactory("testsuite-epoll-boss"));
+            new EpollEventLoopGroup(BOSSES, new DefaultExecutorServiceFactory("testsuite-epoll-boss"));
     static final EventLoopGroup EPOLL_WORKER_GROUP =
-            new EpollEventLoopGroup(WORKERS, new DefaultExecutorFactory("testsuite-epoll-worker"));
+            new EpollEventLoopGroup(WORKERS, new DefaultExecutorServiceFactory("testsuite-epoll-worker"));
 
     @Override
     public List<TestsuitePermutation.BootstrapComboFactory<ServerBootstrap, Bootstrap>> socket() {

transport-udt/src/test/java/io/netty/test/udt/bench/xfer/UdtNetty.java

@@ -28,7 +28,7 @@ import io.netty.test.udt.util.CustomReporter;
 import io.netty.test.udt.util.EchoMessageHandler;
 import io.netty.test.udt.util.TrafficControl;
 import io.netty.test.udt.util.UnitHelp;
-import io.netty.util.concurrent.DefaultExecutorFactory;
+import io.netty.util.concurrent.DefaultExecutorServiceFactory;
 import io.netty.util.internal.logging.InternalLogger;
 import io.netty.util.internal.logging.InternalLoggerFactory;
 
@@ -93,9 +93,9 @@ public final class UdtNetty {
         final ChannelHandler handler2 = new EchoMessageHandler(null, size);
 
         final NioEventLoopGroup group1 =
-                new NioEventLoopGroup(1, new DefaultExecutorFactory("group1"), NioUdtProvider.MESSAGE_PROVIDER);
+                new NioEventLoopGroup(1, new DefaultExecutorServiceFactory("group1"), NioUdtProvider.MESSAGE_PROVIDER);
         final NioEventLoopGroup group2 =
-                new NioEventLoopGroup(1, new DefaultExecutorFactory("group2"), NioUdtProvider.MESSAGE_PROVIDER);
+                new NioEventLoopGroup(1, new DefaultExecutorServiceFactory("group2"), NioUdtProvider.MESSAGE_PROVIDER);
 
         final Bootstrap peerBoot1 = new Bootstrap();
         peerBoot1.group(group1)

transport-udt/src/test/java/io/netty/test/udt/nio/NioUdtByteRendezvousChannelTest.java

@@ -25,7 +25,7 @@ import io.netty.channel.udt.nio.NioUdtByteRendezvousChannel;
 import io.netty.channel.udt.nio.NioUdtProvider;
 import io.netty.test.udt.util.EchoByteHandler;
 import io.netty.test.udt.util.UnitHelp;
-import io.netty.util.concurrent.DefaultExecutorFactory;
+import io.netty.util.concurrent.DefaultExecutorServiceFactory;
 import io.netty.util.internal.logging.InternalLogger;
 import io.netty.util.internal.logging.InternalLoggerFactory;
 import org.junit.Test;
@@ -71,9 +71,9 @@ public class NioUdtByteRendezvousChannelTest extends AbstractUdtTest {
         final EchoByteHandler handler2 = new EchoByteHandler(rate2, messageSize);
 
         final NioEventLoopGroup group1 =
-                new NioEventLoopGroup(1, new DefaultExecutorFactory("group1"), NioUdtProvider.BYTE_PROVIDER);
+                new NioEventLoopGroup(1, new DefaultExecutorServiceFactory("group1"), NioUdtProvider.BYTE_PROVIDER);
         final NioEventLoopGroup group2 =
-                new NioEventLoopGroup(1, new DefaultExecutorFactory("group2"), NioUdtProvider.BYTE_PROVIDER);
+                new NioEventLoopGroup(1, new DefaultExecutorServiceFactory("group2"), NioUdtProvider.BYTE_PROVIDER);
 
         final Bootstrap boot1 = new Bootstrap();
         boot1.group(group1)

transport-udt/src/test/java/io/netty/test/udt/nio/NioUdtMessageRendezvousChannelTest.java

@@ -25,7 +25,7 @@ import io.netty.channel.udt.nio.NioUdtMessageRendezvousChannel;
 import io.netty.channel.udt.nio.NioUdtProvider;
 import io.netty.test.udt.util.EchoMessageHandler;
 import io.netty.test.udt.util.UnitHelp;
-import io.netty.util.concurrent.DefaultExecutorFactory;
+import io.netty.util.concurrent.DefaultExecutorServiceFactory;
 import io.netty.util.internal.logging.InternalLogger;
 import io.netty.util.internal.logging.InternalLoggerFactory;
 import org.junit.Test;
@@ -69,9 +69,9 @@ public class NioUdtMessageRendezvousChannelTest extends AbstractUdtTest {
         final EchoMessageHandler handler2 = new EchoMessageHandler(rate2, messageSize);
 
         final NioEventLoopGroup group1 =
-                new NioEventLoopGroup(1, new DefaultExecutorFactory("group1"), NioUdtProvider.MESSAGE_PROVIDER);
+                new NioEventLoopGroup(1, new DefaultExecutorServiceFactory("group1"), NioUdtProvider.MESSAGE_PROVIDER);
         final NioEventLoopGroup group2 =
-                new NioEventLoopGroup(1, new DefaultExecutorFactory("group2"), NioUdtProvider.MESSAGE_PROVIDER);
+                new NioEventLoopGroup(1, new DefaultExecutorServiceFactory("group2"), NioUdtProvider.MESSAGE_PROVIDER);
 
         final Bootstrap boot1 = new Bootstrap();
         boot1.group(group1)

transport/src/main/java/io/netty/channel/DefaultEventLoop.java

@@ -15,7 +15,7 @@
  */
 package io.netty.channel;
 
-import io.netty.util.concurrent.DefaultExecutorFactory;
+import io.netty.util.concurrent.DefaultExecutorServiceFactory;
 
 import java.util.concurrent.Executor;
 public class DefaultEventLoop extends SingleThreadEventLoop {
@@ -29,7 +29,7 @@ public class DefaultEventLoop extends SingleThreadEventLoop {
     }
 
     public DefaultEventLoop(EventLoopGroup parent) {
-        this(parent, new DefaultExecutorFactory(DefaultEventLoop.class).newExecutor(1));
+        this(parent, new DefaultExecutorServiceFactory(DefaultEventLoop.class).newExecutorService(1));
     }
 
     public DefaultEventLoop(EventLoopGroup parent, Executor executor) {

transport/src/main/java/io/netty/channel/DefaultEventLoopGroup.java

@@ -15,7 +15,7 @@
  */
 package io.netty.channel;
 
-import io.netty.util.concurrent.ExecutorFactory;
+import io.netty.util.concurrent.ExecutorServiceFactory;
 
 import java.util.concurrent.Executor;
 
@@ -28,7 +28,7 @@ public class DefaultEventLoopGroup extends MultithreadEventLoopGroup {
      * Create a new instance that uses twice as many {@link EventLoop}s as there processors/cores
      * available, as well as the default {@link Executor}.
      *
-     * @see io.netty.util.concurrent.DefaultExecutorFactory
+     * @see io.netty.util.concurrent.DefaultExecutorServiceFactory
      */
     public DefaultEventLoopGroup() {
         this(0);
@@ -63,10 +63,11 @@ public class DefaultEventLoopGroup extends MultithreadEventLoopGroup {
      *                           requested from the default executor. It is generally advised for the number
      *                           of {@link EventLoop}s and the number of {@link Thread}s used by the
      *                           {@code executor} to lie very close together.
-     * @param executorFactory   the {@link ExecutorFactory} to use, or {@code null} if the default should be used.
+     * @param executorServiceFactory   the {@link ExecutorServiceFactory} to use, or {@code null} if the default
+     *                                 should be used.
      */
-    public DefaultEventLoopGroup(int nEventLoops, ExecutorFactory executorFactory) {
+    public DefaultEventLoopGroup(int nEventLoops, ExecutorServiceFactory executorServiceFactory) {
-        super(nEventLoops, executorFactory);
+        super(nEventLoops, executorServiceFactory);
     }
 
     @Override

transport/src/main/java/io/netty/channel/MultithreadEventLoopGroup.java

@@ -15,7 +15,7 @@
  */
 package io.netty.channel;
 
-import io.netty.util.concurrent.ExecutorFactory;
+import io.netty.util.concurrent.ExecutorServiceFactory;
 import io.netty.util.concurrent.MultithreadEventExecutorGroup;
 import io.netty.util.internal.SystemPropertyUtil;
 import io.netty.util.internal.logging.InternalLogger;
@@ -50,10 +50,12 @@ public abstract class MultithreadEventLoopGroup extends MultithreadEventExecutor
     }
 
     /**
-     * @see {@link MultithreadEventExecutorGroup#MultithreadEventExecutorGroup(int, ExecutorFactory, Object...)}
+     * @see {@link MultithreadEventExecutorGroup#MultithreadEventExecutorGroup(int, ExecutorServiceFactory, Object...)}
      */
-    protected MultithreadEventLoopGroup(int nEventLoops, ExecutorFactory executorFactory, Object... args) {
+    protected MultithreadEventLoopGroup(int nEventLoops,
-        super(nEventLoops == 0 ? DEFAULT_EVENT_LOOP_THREADS : nEventLoops, executorFactory, args);
+                                        ExecutorServiceFactory executorServiceFactory,
+                                        Object... args) {
+        super(nEventLoops == 0 ? DEFAULT_EVENT_LOOP_THREADS : nEventLoops, executorServiceFactory, args);
     }
 
     @Override

transport/src/main/java/io/netty/channel/nio/NioEventLoopGroup.java

@@ -18,9 +18,8 @@ package io.netty.channel.nio;
 import io.netty.channel.Channel;
 import io.netty.channel.EventLoop;
 import io.netty.channel.MultithreadEventLoopGroup;
-import io.netty.util.concurrent.DefaultExecutorFactory;
 import io.netty.util.concurrent.EventExecutor;
-import io.netty.util.concurrent.ExecutorFactory;
+import io.netty.util.concurrent.ExecutorServiceFactory;
 
 import java.nio.channels.Selector;
 import java.nio.channels.spi.SelectorProvider;
@@ -36,7 +35,7 @@ public class NioEventLoopGroup extends MultithreadEventLoopGroup {
      * available, as well as the default {@link Executor} and the {@link SelectorProvider} which
      * is returned by {@link SelectorProvider#provider()}.
      *
-     * @see DefaultExecutorFactory
+     * @see io.netty.util.concurrent.DefaultExecutorServiceFactory
      */
     public NioEventLoopGroup() {
         this(0);
@@ -46,7 +45,7 @@ public class NioEventLoopGroup extends MultithreadEventLoopGroup {
      * Create a new instance that uses the default {@link Executor} and the {@link SelectorProvider} which
      * is returned by {@link SelectorProvider#provider()}.
      *
-     * @see DefaultExecutorFactory
+     * @see io.netty.util.concurrent.DefaultExecutorServiceFactory
      *
      * @param nEventLoops   the number of {@link EventLoop}s that will be used by this instance.
      *                      If {@code executor} is {@code null} this number will also be the parallelism
@@ -81,10 +80,11 @@ public class NioEventLoopGroup extends MultithreadEventLoopGroup {
      *                      requested from the default executor. It is generally advised for the number
      *                      of {@link EventLoop}s and the number of {@link Thread}s used by the
      *                      {@code executor} to lie very close together.
-     * @param executorFactory   the {@link ExecutorFactory} to use, or {@code null} if the default should be used.
+     * @param executorServiceFactory   the {@link ExecutorServiceFactory} to use, or {@code null} if the default
+     *                                 should be used.
      */
-    public NioEventLoopGroup(int nEventLoops, ExecutorFactory executorFactory) {
+    public NioEventLoopGroup(int nEventLoops, ExecutorServiceFactory executorServiceFactory) {
-        this(nEventLoops, executorFactory, SelectorProvider.provider());
+        this(nEventLoops, executorServiceFactory, SelectorProvider.provider());
     }
 
     /**
@@ -106,12 +106,13 @@ public class NioEventLoopGroup extends MultithreadEventLoopGroup {
      *                      requested from the default executor. It is generally advised for the number
      *                      of {@link EventLoop}s and the number of {@link Thread}s used by the
      *                      {@code executor} to lie very close together.
-     * @param executorFactory   the {@link ExecutorFactory} to use, or {@code null} if the default should be used.
+     * @param executorServiceFactory   the {@link ExecutorServiceFactory} to use, or {@code null} if the
+     *                                 default should be used.
      * @param selectorProvider  the {@link SelectorProvider} to use. This value must not be {@code null}.
      */
     public NioEventLoopGroup(
-            int nEventLoops, ExecutorFactory executorFactory, final SelectorProvider selectorProvider) {
+            int nEventLoops, ExecutorServiceFactory executorServiceFactory, final SelectorProvider selectorProvider) {
-        super(nEventLoops, executorFactory, selectorProvider);
+        super(nEventLoops, executorServiceFactory, selectorProvider);
     }
 
     /**

transport/src/test/java/io/netty/channel/SingleThreadEventLoopTest.java

@@ -19,11 +19,10 @@ import ch.qos.logback.classic.Logger;
 import ch.qos.logback.classic.spi.ILoggingEvent;
 import ch.qos.logback.core.Appender;
 import io.netty.channel.local.LocalChannel;
-import io.netty.util.concurrent.DefaultExecutorFactory;
+import io.netty.util.concurrent.DefaultExecutorServiceFactory;
 import io.netty.util.concurrent.EventExecutor;
 import io.netty.util.concurrent.PausableEventExecutor;
 import org.junit.After;
-import org.junit.AfterClass;
 import org.junit.Before;
 import org.junit.BeforeClass;
 import org.junit.Test;
@@ -62,7 +61,7 @@ public class SingleThreadEventLoopTest {
 
     @BeforeClass
     public static void newExecutor() {
-        executor = new DefaultExecutorFactory("SingleThreadEventLoopTest").newExecutor(2);
+        executor = new DefaultExecutorServiceFactory("SingleThreadEventLoopTest").newExecutorService(2);
     }
 
     @Before

transport/src/test/java/io/netty/channel/ThreadPerChannelEventLoopGroupTest.java

@@ -19,7 +19,7 @@ package io.netty.channel;
 import io.netty.channel.embedded.EmbeddedChannel;
 import io.netty.channel.group.ChannelGroup;
 import io.netty.channel.group.DefaultChannelGroup;
-import io.netty.util.concurrent.DefaultExecutorFactory;
+import io.netty.util.concurrent.DefaultExecutorServiceFactory;
 import io.netty.util.concurrent.DefaultPromise;
 import io.netty.util.concurrent.EventExecutor;
 import io.netty.util.concurrent.GlobalEventExecutor;
@@ -92,7 +92,7 @@ public class ThreadPerChannelEventLoopGroupTest {
 
     private static final class TestEventExecutor extends SingleThreadEventExecutor {
         TestEventExecutor() {
-            super(null, new DefaultExecutorFactory(TestEventExecutor.class).newExecutor(1), false);
+            super(null, new DefaultExecutorServiceFactory(TestEventExecutor.class).newExecutorService(1), false);
         }
 
         @Override

transport/src/test/java/io/netty/channel/local/LocalTransportThreadModelTest.java

@@ -27,24 +27,16 @@ import io.netty.channel.DefaultEventLoopGroup;
 import io.netty.channel.EventLoopGroup;
 import io.netty.util.ReferenceCountUtil;
 import io.netty.util.concurrent.DefaultEventExecutorGroup;
-import io.netty.util.concurrent.DefaultExecutorFactory;
+import io.netty.util.concurrent.DefaultExecutorServiceFactory;
 import io.netty.util.concurrent.EventExecutorGroup;
-import io.netty.util.concurrent.ExecutorFactory;
 import org.junit.AfterClass;
 import org.junit.Assert;
 import org.junit.BeforeClass;
 import org.junit.Ignore;
 import org.junit.Test;
 
-import java.util.ArrayList;
-import java.util.List;
 import java.util.Queue;
-import java.util.Random;
 import java.util.concurrent.ConcurrentLinkedQueue;
-import java.util.concurrent.Executor;
-import java.util.concurrent.Executors;
-import java.util.concurrent.ThreadFactory;
-import java.util.concurrent.atomic.AtomicInteger;
 import java.util.concurrent.atomic.AtomicReference;
 
 public class LocalTransportThreadModelTest {
@@ -90,9 +82,9 @@ public class LocalTransportThreadModelTest {
 
     @Test(timeout = 5000)
     public void testStagedExecution() throws Throwable {
-        EventLoopGroup l = new DefaultEventLoopGroup(4, new DefaultExecutorFactory("l"));
+        EventLoopGroup l = new DefaultEventLoopGroup(4, new DefaultExecutorServiceFactory("l"));
-        EventExecutorGroup e1 = new DefaultEventExecutorGroup(4, new DefaultExecutorFactory("e1"));
+        EventExecutorGroup e1 = new DefaultEventExecutorGroup(4, new DefaultExecutorServiceFactory("e1"));
-        EventExecutorGroup e2 = new DefaultEventExecutorGroup(4, new DefaultExecutorFactory("e2"));
+        EventExecutorGroup e2 = new DefaultEventExecutorGroup(4, new DefaultExecutorServiceFactory("e2"));
         ThreadNameAuditor h1 = new ThreadNameAuditor();
         ThreadNameAuditor h2 = new ThreadNameAuditor();
         ThreadNameAuditor h3 = new ThreadNameAuditor(true);
@@ -214,12 +206,12 @@ public class LocalTransportThreadModelTest {
     @Test(timeout = 30000)
     @Ignore
     public void testConcurrentMessageBufferAccess() throws Throwable {
-        EventLoopGroup l0 = new DefaultEventLoopGroup(4, new DefaultExecutorFactory("l0"));
+        EventLoopGroup l0 = new DefaultEventLoopGroup(4, new DefaultExecutorServiceFactory("l0"));
-        EventExecutorGroup e1 = new DefaultEventExecutorGroup(4, new DefaultExecutorFactory("e1"));
+        EventExecutorGroup e1 = new DefaultEventExecutorGroup(4, new DefaultExecutorServiceFactory("e1"));
-        EventExecutorGroup e2 = new DefaultEventExecutorGroup(4, new DefaultExecutorFactory("e2"));
+        EventExecutorGroup e2 = new DefaultEventExecutorGroup(4, new DefaultExecutorServiceFactory("e2"));
-        EventExecutorGroup e3 = new DefaultEventExecutorGroup(4, new DefaultExecutorFactory("e3"));
+        EventExecutorGroup e3 = new DefaultEventExecutorGroup(4, new DefaultExecutorServiceFactory("e3"));
-        EventExecutorGroup e4 = new DefaultEventExecutorGroup(4, new DefaultExecutorFactory("e4"));
+        EventExecutorGroup e4 = new DefaultEventExecutorGroup(4, new DefaultExecutorServiceFactory("e4"));
-        EventExecutorGroup e5 = new DefaultEventExecutorGroup(4, new DefaultExecutorFactory("e5"));
+        EventExecutorGroup e5 = new DefaultEventExecutorGroup(4, new DefaultExecutorServiceFactory("e5"));
 
         try {
             final MessageForwarder1 h1 = new MessageForwarder1();

transport/src/test/java/io/netty/channel/local/LocalTransportThreadModelTest3.java

@@ -26,7 +26,7 @@ import io.netty.channel.DefaultEventLoopGroup;
 import io.netty.channel.EventLoopGroup;
 import io.netty.util.ReferenceCountUtil;
 import io.netty.util.concurrent.DefaultEventExecutorGroup;
-import io.netty.util.concurrent.DefaultExecutorFactory;
+import io.netty.util.concurrent.DefaultExecutorServiceFactory;
 import io.netty.util.concurrent.EventExecutorGroup;
 import org.junit.AfterClass;
 import org.junit.Assert;
@@ -116,12 +116,12 @@ public class LocalTransportThreadModelTest3 {
     }
 
     private static void testConcurrentAddRemove(boolean inbound) throws Exception {
-        EventLoopGroup l = new DefaultEventLoopGroup(4, new DefaultExecutorFactory("l"));
+        EventLoopGroup l = new DefaultEventLoopGroup(4, new DefaultExecutorServiceFactory("l"));
-        EventExecutorGroup e1 = new DefaultEventExecutorGroup(4, new DefaultExecutorFactory("e1"));
+        EventExecutorGroup e1 = new DefaultEventExecutorGroup(4, new DefaultExecutorServiceFactory("e1"));
-        EventExecutorGroup e2 = new DefaultEventExecutorGroup(4, new DefaultExecutorFactory("e2"));
+        EventExecutorGroup e2 = new DefaultEventExecutorGroup(4, new DefaultExecutorServiceFactory("e2"));
-        EventExecutorGroup e3 = new DefaultEventExecutorGroup(4, new DefaultExecutorFactory("e3"));
+        EventExecutorGroup e3 = new DefaultEventExecutorGroup(4, new DefaultExecutorServiceFactory("e3"));
-        EventExecutorGroup e4 = new DefaultEventExecutorGroup(4, new DefaultExecutorFactory("e4"));
+        EventExecutorGroup e4 = new DefaultEventExecutorGroup(4, new DefaultExecutorServiceFactory("e4"));
-        EventExecutorGroup e5 = new DefaultEventExecutorGroup(4, new DefaultExecutorFactory("e5"));
+        EventExecutorGroup e5 = new DefaultEventExecutorGroup(4, new DefaultExecutorServiceFactory("e5"));
 
         final EventExecutorGroup[] groups = { e1, e2, e3, e4, e5 };
         try {