[Bug] all channels of the EventLoop delay time

[6Glory9]

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• I am sure that all the content I provide is in English.

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• I had searched in the issues and found no similar issues.

Apache Dubbo Component

Java SDK (apache/dubbo)

Dubbo Version

dubbo 3.2.12

Steps to reproduce this issue

org.apache.dubbo.remoting.transport.netty4.NettyConnectionClient.ConnectionListener#operationComplete

 final EventLoop loop = future.channel().eventLoop();
            loop.schedule(
                    () -> {
                        try {
                            connectionClient.doConnect();
                        } catch (RemotingException e) {
                            LOGGER.error(
                                    TRANSPORT_FAILED_RECONNECT,
                                    "",
                                    "",
                                    "Failed to connect to server: " + getConnectAddress());
                        }
                    },
                    1L,
                    TimeUnit.SECONDS);

connectionClient Always fails to connect, default connection wait time is 3 seconds. This will occupy the EventLoop CPU from time to time, and indirectly affect the communication of other registered EventLoop channels. Sometimes there may be a request timeout.

1. The server receives the request with a delay.Timely
2. server execution is short, client still sometimes timeout.

What you expected to happen

1. Simply handle the connection and wait only for a shorter period of time. For example, 500ms, this way, has been provided. The dead loop body occupies the EventLoop for a long time.

2. It is recommended to add a user thread instead of the EventLoop

Anything else

No response

Are you willing to submit a pull request to fix on your own?

• Yes I am willing to submit a pull request on my own!

Code of Conduct

• I agree to follow this project's Code of Conduct

[AlbumenJ]

@icodening PTAL

[icodening]

Same as #13041. Welcome to submit PR

[tritone-l]

I'm willing to do it ,pls assign to me.

[AlbumenJ]

I'm willing to do it ,pls assign to me.

We have a PR related with this issue. For further improvement, we need to consider use async connection future instead of sync. But this may cause a lot of changes in Dubbo. And would you like to work for it?