[Test][remote]update netty util test and fix init channel error (#3671)

dolphinscheduler-remote/src/main/java/org/apache/dolphinscheduler/remote/NettyRemotingServer.java

@@ -17,16 +17,6 @@
 
 package org.apache.dolphinscheduler.remote;
 
-import io.netty.bootstrap.ServerBootstrap;
-import io.netty.channel.ChannelFuture;
-import io.netty.channel.ChannelInitializer;
-import io.netty.channel.ChannelOption;
-import io.netty.channel.ChannelPipeline;
-import io.netty.channel.EventLoopGroup;
-import io.netty.channel.epoll.EpollEventLoopGroup;
-import io.netty.channel.nio.NioEventLoopGroup;
-import io.netty.channel.socket.nio.NioSocketChannel;
-
 import org.apache.dolphinscheduler.remote.codec.NettyDecoder;
 import org.apache.dolphinscheduler.remote.codec.NettyEncoder;
 import org.apache.dolphinscheduler.remote.command.CommandType;
@@ -36,15 +26,25 @@ import org.apache.dolphinscheduler.remote.processor.NettyRequestProcessor;
 import org.apache.dolphinscheduler.remote.utils.Constants;
 import org.apache.dolphinscheduler.remote.utils.NettyUtils;
 
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.ThreadFactory;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicInteger;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import io.netty.bootstrap.ServerBootstrap;
+import io.netty.channel.ChannelFuture;
+import io.netty.channel.ChannelInitializer;
+import io.netty.channel.ChannelOption;
+import io.netty.channel.ChannelPipeline;
+import io.netty.channel.EventLoopGroup;
+import io.netty.channel.epoll.EpollEventLoopGroup;
+import io.netty.channel.nio.NioEventLoopGroup;
+import io.netty.channel.socket.SocketChannel;
+
 /**
  * remoting netty server
  */
@@ -152,10 +152,10 @@ public class NettyRemotingServer {
                 .childOption(ChannelOption.TCP_NODELAY, serverConfig.isTcpNoDelay())
                 .childOption(ChannelOption.SO_SNDBUF, serverConfig.getSendBufferSize())
                 .childOption(ChannelOption.SO_RCVBUF, serverConfig.getReceiveBufferSize())
-                .childHandler(new ChannelInitializer<NioSocketChannel>() {
+                .childHandler(new ChannelInitializer<SocketChannel>() {
 
                     @Override
-                    protected void initChannel(NioSocketChannel ch) throws Exception {
+                    protected void initChannel(SocketChannel ch) throws Exception {
                         initNettyChannel(ch);
                     }
                 });
@@ -181,9 +181,8 @@ public class NettyRemotingServer {
      * init netty channel
      *
      * @param ch socket channel
-     * @throws Exception
      */
-    private void initNettyChannel(NioSocketChannel ch) throws Exception {
+    private void initNettyChannel(SocketChannel ch) {
         ChannelPipeline pipeline = ch.pipeline();
         pipeline.addLast("encoder", encoder);
         pipeline.addLast("decoder", new NettyDecoder());

dolphinscheduler-remote/src/test/java/org/apache/dolphinscheduler/remote/NettyUtilTest.java

@@ -17,20 +17,28 @@
 
 package org.apache.dolphinscheduler.remote;
 
+import static org.apache.dolphinscheduler.remote.utils.Constants.OS_NAME;
+
 import org.apache.dolphinscheduler.remote.utils.NettyUtils;
 
 import org.junit.Assert;
 import org.junit.Test;
 
+import io.netty.channel.epoll.Epoll;
+
 /**
  * NettyUtilTest
  */
 public class NettyUtilTest {
 
+
     @Test
     public void testUserEpoll() {
-        System.setProperty("netty.epoll.enable", "false");
+        if (OS_NAME.toLowerCase().contains("linux") && Epoll.isAvailable()) {
-        Assert.assertFalse(NettyUtils.useEpoll());
+            Assert.assertTrue(NettyUtils.useEpoll());
+        } else {
+            Assert.assertFalse(NettyUtils.useEpoll());
+        }
     }
 
 }