Cannot convert argument of type class java.net.SocketException

[preduseldavid]

Description

Sometimes I get this error: Cannot convert argument of type class java.net.SocketException. I cannot reproduce it because sometimes appears, sometimes not... most of the time it doesn't appear

[Rapsssito]

@preduseldavid 👋👋👋. Could you provide more info about your environment? (RN version, library version, OS, etc.)

Could you also provide the socket configuration with some code for context?

[preduseldavid]

The current version (just upgraded RN from 0.61.5 a few days ago - the bug was saw on RN 0.61.5)
System:
OS: Linux 5.3 Linux Mint 19.3 (Tricia)
CPU: (4) x64 Intel(R) Core(TM) i5-7500 CPU @ 3.40GHz
Memory: 2.90 GB / 15.60 GB
Shell: 4.4.20 - /bin/bash
Binaries:
Node: 13.12.0 - /usr/bin/node
Yarn: Not Found
npm: 6.14.4 - /usr/bin/npm
Watchman: 4.9.0 - /usr/local/bin/watchman
SDKs:
Android SDK: Not Found
IDEs:
Android Studio: 3.5 AI-191.8026.42.35.6010548
Languages:
Python: 2.7.17 - /usr/bin/python
npmPackages:
@react-native-community/cli: Not Found
react: 16.11.0 => 16.11.0
react-native: 0.62.0 => 0.62.0
npmGlobalPackages:
react-native: Not Found

"react-native-tcp-socket": "^3.4.0" - I haven't tested it yet on this newer version (3.4.1)

[Rapsssito]

Thanks for the info, I will check it out!
It will really speed things up if you could provide the piece of code that throws this error (and maybe the socket initialization configuration object).

[preduseldavid]

async _connectToServer() {
    var options = {host: this.serverHost, port: this.serverPort};

    NetInfo.fetch().then(state => {
      if (state.isConnected) {
        let client = TcpSocket.createConnection(options, () => {
          if (!this._toastInternetShow && this._reconnecting)
            Toast.show('Connected', false, 3000);
          else Toast.hide();

          this._reconnecting = 0;
          this._toastInternetShow = true;
          this._internetServiceEnabled = true;

          /* Do we have the location available? */
          let location = locationService.getLocation();
          if (locationService.locationIsAvailable(location)) {
            /* Register - send our location coords */
            this.updateLocation(location);
          }
          this.queueSendingPacketResume();
        });

        client.on('data', data => {
          InteractionManager.runAfterInteractions(() => {
            this._readEvent(data);
          });
        });

        client.on('error', error => {
          this.client.destroy();

          if (!this._reconnecting) {
            this._reconnecting = 1;
            Toast.show('Reconnecting');
            setTimeout(this._connectCallback, 1000);
          }
        });

        client.on('close', () => {
          this.client.destroy();

          if (!this._reconnecting) {
            this._reconnecting = 1;
            Toast.show('Reconnecting');
            setTimeout(this._connectCallback, 1000);
          }
        });

        this.client = client;
      } else {
        this._reconnecting = 1;
        this._internetServiceEnabled = false;
        if (this._toastInternetShow) {
          this._toastInternetShow = false;
          Toast.show('You are Offline', false, 3000);
        }

        setTimeout(this._connectCallback, 2000);
      }
    });
  }

and this is how I send a message:

    try {
      this.client.write(buf);
    } catch (e) {
      this.queueSendingPacket(buf);
    }

[Rapsssito]

@preduseldavid, thanks. I found the issue! It is related to the callback exception handling when writing on the socket. I will release a fix ASAP.

[github-actions]

🎉 This issue has been resolved in version 3.4.2 🎉

The release is available on:

• GitHub release
• npm package (@latest dist-tag)

Your semantic-release bot 📦🚀

[Rapsssito]

@preduseldavid, I have released a fix that may resolve your issue 🎉. If the problem still persists, feel free to reopen this issue.

Looking at the root cause of the problem, the error Cannot convert argument of type class java.net.SocketException might be hiding another issue. If that is the case, please open a bug report and I will be happy to help!