Init SslContext when channel inited (#15664)

Author: AlbumenJ

dubbo-remoting/dubbo-remoting-netty4/src/main/java/org/apache/dubbo/remoting/transport/netty4/NettyClient.java

@@ -122,13 +122,13 @@ protected void initBootstrap(NettyClientHandler nettyClientHandler) {
                 .channel(socketChannelClass());
 
         bootstrap.option(ChannelOption.CONNECT_TIMEOUT_MILLIS, Math.max(DEFAULT_CONNECT_TIMEOUT, getConnectTimeout()));
-        SslContext sslContext = SslContexts.buildClientSslContext(getUrl());
         bootstrap.handler(new ChannelInitializer<SocketChannel>() {
 
             @Override
             protected void initChannel(SocketChannel ch) throws Exception {
                 int heartbeatInterval = UrlUtils.getHeartbeat(getUrl());
 
+                SslContext sslContext = SslContexts.buildClientSslContext(getUrl());
                 if (sslContext != null) {
                     ch.pipeline().addLast("negotiation", new SslClientTlsHandler(sslContext));
                 }

dubbo-remoting/dubbo-remoting-netty4/src/main/java/org/apache/dubbo/remoting/transport/netty4/NettyConnectionClient.java

@@ -113,14 +113,14 @@ private void initBootstrap() {
 
         final NettyConnectionHandler connectionHandler = new NettyConnectionHandler(this);
         nettyBootstrap.option(ChannelOption.CONNECT_TIMEOUT_MILLIS, getConnectTimeout());
-        SslContext sslContext = SslContexts.buildClientSslContext(getUrl());
         nettyBootstrap.handler(new ChannelInitializer<SocketChannel>() {
             @Override
             protected void initChannel(SocketChannel ch) {
                 NettyChannel nettyChannel = NettyChannel.getOrAddChannel(ch, getUrl(), getChannelHandler());
                 final ChannelPipeline pipeline = ch.pipeline();
                 NettySslContextOperator nettySslContextOperator = new NettySslContextOperator();
 
+                SslContext sslContext = SslContexts.buildClientSslContext(getUrl());
                 if (sslContext != null) {
                     pipeline.addLast("negotiation", new SslClientTlsHandler(sslContext));
                 }