HTTP/2 Allow more time for EventLoopGroup to shutdown in test that use LocalChannel

Motivation:
The CI servers have reported leaks while building the HTTP/2 unit tests. The unit tests attempt to wait for the channels to be closed before exiting the test, but we should wait in case there are any tasks pending on the EventLoopGroup's task queues.

Modifications:
- Change the Future.sync() operations to Future.syncUninterruptibly()
- HTTP/2 unit tests which use local channel should wait for 5 seconds before shutting down the EventLoopGroups

Result:
More likely that any cleanup related tasks will execute before the unit tests are shutdown.

codec-http2/src/test/java/io/netty/handler/codec/http2/Http2CodecTest.java

@@ -36,9 +36,9 @@ import org.junit.BeforeClass;
 import org.junit.Test;
 
 import java.util.concurrent.CountDownLatch;
-import java.util.concurrent.TimeUnit;
 
 import static io.netty.handler.codec.http2.Http2CodecUtil.isStreamIdValid;
+import static java.util.concurrent.TimeUnit.SECONDS;
 import static junit.framework.TestCase.assertFalse;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
@@ -83,27 +83,27 @@ public class Http2CodecTest {
                 .group(group)
                 .handler(new Http2Codec(false, new TestChannelInitializer()));
         clientChannel = cb.connect(serverAddress).sync().channel();
-        assertTrue(serverChannelLatch.await(5, TimeUnit.SECONDS));
+        assertTrue(serverChannelLatch.await(5, SECONDS));
     }
 
     @AfterClass
     public static void shutdown() {
-        group.shutdownGracefully();
+        group.shutdownGracefully(0, 5, SECONDS);
     }
 
     @After
     public void tearDown() throws Exception {
         if (clientChannel != null) {
-            clientChannel.close().sync();
+            clientChannel.close().syncUninterruptibly();
             clientChannel = null;
         }
         if (serverChannel != null) {
-            serverChannel.close().sync();
+            serverChannel.close().syncUninterruptibly();
             serverChannel = null;
         }
         final Channel serverConnectedChannel = this.serverConnectedChannel;
         if (serverConnectedChannel != null) {
-            serverConnectedChannel.close().sync();
+            serverConnectedChannel.close().syncUninterruptibly();
             this.serverConnectedChannel = null;
         }
     }

codec-http2/src/test/java/io/netty/handler/codec/http2/Http2ConnectionRoundtripTest.java

@@ -111,24 +111,24 @@ public class Http2ConnectionRoundtripTest {
     @After
     public void teardown() throws Exception {
         if (clientChannel != null) {
-            clientChannel.close().sync();
+            clientChannel.close().syncUninterruptibly();
             clientChannel = null;
         }
         if (serverChannel != null) {
-            serverChannel.close().sync();
+            serverChannel.close().syncUninterruptibly();
             serverChannel = null;
         }
         final Channel serverConnectedChannel = this.serverConnectedChannel;
         if (serverConnectedChannel != null) {
-            serverConnectedChannel.close().sync();
+            serverConnectedChannel.close().syncUninterruptibly();
             this.serverConnectedChannel = null;
         }
-        Future<?> serverGroup = sb.config().group().shutdownGracefully(0, 0, MILLISECONDS);
-        Future<?> serverChildGroup = sb.config().childGroup().shutdownGracefully(0, 0, MILLISECONDS);
-        Future<?> clientGroup = cb.config().group().shutdownGracefully(0, 0, MILLISECONDS);
-        serverGroup.sync();
-        serverChildGroup.sync();
-        clientGroup.sync();
+        Future<?> serverGroup = sb.config().group().shutdownGracefully(0, 5, SECONDS);
+        Future<?> serverChildGroup = sb.config().childGroup().shutdownGracefully(0, 5, SECONDS);
+        Future<?> clientGroup = cb.config().group().shutdownGracefully(0, 5, SECONDS);
+        serverGroup.syncUninterruptibly();
+        serverChildGroup.syncUninterruptibly();
+        clientGroup.syncUninterruptibly();
     }
 
     @Test

codec-http2/src/test/java/io/netty/handler/codec/http2/HttpToHttp2ConnectionHandlerTest.java

@@ -105,24 +105,24 @@ public class HttpToHttp2ConnectionHandlerTest {
     @After
     public void teardown() throws Exception {
         if (clientChannel != null) {
-            clientChannel.close().sync();
+            clientChannel.close().syncUninterruptibly();
             clientChannel = null;
         }
         if (serverChannel != null) {
-            serverChannel.close().sync();
+            serverChannel.close().syncUninterruptibly();
             serverChannel = null;
         }
         final Channel serverConnectedChannel = this.serverConnectedChannel;
         if (serverConnectedChannel != null) {
-            serverConnectedChannel.close().sync();
+            serverConnectedChannel.close().syncUninterruptibly();
             this.serverConnectedChannel = null;
         }
-        Future<?> serverGroup = sb.config().group().shutdownGracefully(0, 0, MILLISECONDS);
-        Future<?> serverChildGroup = sb.config().childGroup().shutdownGracefully(0, 0, MILLISECONDS);
-        Future<?> clientGroup = cb.config().group().shutdownGracefully(0, 0, MILLISECONDS);
-        serverGroup.sync();
-        serverChildGroup.sync();
-        clientGroup.sync();
+        Future<?> serverGroup = sb.config().group().shutdownGracefully(0, 5, SECONDS);
+        Future<?> serverChildGroup = sb.config().childGroup().shutdownGracefully(0, 5, SECONDS);
+        Future<?> clientGroup = cb.config().group().shutdownGracefully(0, 5, SECONDS);
+        serverGroup.syncUninterruptibly();
+        serverChildGroup.syncUninterruptibly();
+        clientGroup.syncUninterruptibly();
     }
 
     @Test

codec-http2/src/test/java/io/netty/handler/codec/http2/InboundHttp2ToHttpAdapterTest.java

@@ -112,24 +112,24 @@ public class InboundHttp2ToHttpAdapterTest {
         cleanupCapturedRequests();
         cleanupCapturedResponses();
         if (clientChannel != null) {
-            clientChannel.close().sync();
+            clientChannel.close().syncUninterruptibly();
             clientChannel = null;
         }
         if (serverChannel != null) {
-            serverChannel.close().sync();
+            serverChannel.close().syncUninterruptibly();
             serverChannel = null;
         }
         final Channel serverConnectedChannel = this.serverConnectedChannel;
         if (serverConnectedChannel != null) {
-            serverConnectedChannel.close().sync();
+            serverConnectedChannel.close().syncUninterruptibly();
             this.serverConnectedChannel = null;
         }
-        Future<?> serverGroup = sb.config().group().shutdownGracefully(0, 0, MILLISECONDS);
-        Future<?> serverChildGroup = sb.config().childGroup().shutdownGracefully(0, 0, MILLISECONDS);
-        Future<?> clientGroup = cb.config().group().shutdownGracefully(0, 0, MILLISECONDS);
-        serverGroup.sync();
-        serverChildGroup.sync();
-        clientGroup.sync();
+        Future<?> serverGroup = sb.config().group().shutdownGracefully(0, 5, SECONDS);
+        Future<?> serverChildGroup = sb.config().childGroup().shutdownGracefully(0, 5, SECONDS);
+        Future<?> clientGroup = cb.config().group().shutdownGracefully(0, 5, SECONDS);
+        serverGroup.syncUninterruptibly();
+        serverChildGroup.syncUninterruptibly();
+        clientGroup.syncUninterruptibly();
     }
 
     @Test