Unix jsonrpc server paniced when handling connection

[weiyuhang2011]

I tried to build a jsonrpc server using unix socket. But it seems like the server throw panic on handling connection.

This is my server code:

fn start_run() {
    use karyon_core::async_util::sleep;
    use karyon_jsonrpc::Server;
    use rpc::Calc;
    use std::sync::Arc;
    use std::time::Duration;
    smol::block_on(async {
        let calc = Arc::new(Calc {});

        // Creates a new server
        let server = Server::builder("unix:///tmp/karyon-test.sock")
            .expect("Create a new server builder")
            .service(calc.clone())
            .pubsub_service(calc)
            .build()
            .await
            .expect("Build a new server");

        // Start the server
        server.start();

        sleep(Duration::MAX).await;
    });
}

I use nc -U /tmp/karyon-test.sock to test the server. Below is the server log:

2024-07-04T09:17:01Z INFO  karyon_jsonrpc::server] RPC server listens to the endpoint: unix://tmp/karyon-test.sock
thread 'smol-executor' panicked at 'get peer endpoint: IO(Kind(AddrNotAvailable))', /root/.cargo/registry/src/github.com-1ecc6299db9ec823/karyon_jsonrpc-0.1.5/src/server/mod.rs:110:45
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

[hozan23]

Hello @weiyuhang2011, I just patched a fix for this issue. You can use the karyon_jsonrpc from the master branch until I deploy the new changes and fixes to crates.io.

[weiyuhang2011]

Thanks for your quick response. But I dont't understand why it can't connect to the server. I think I used the correct socket address.

[hozan23]

Hey @weiyuhang2011, yes, the address is correct. You can also just use the path: Server::builder("unix:/tmp/karyon-test.sock"). However, the issue was due to a bug in handling new connections from the server side. It was trying to resolve the client address for debugging.

You can check the patch here: https://github.com/karyontech/karyon/commit/6c65232d741229635151671708556b9af7ef75ac