Attempt to invoke virtual method 'java.io.OutputStream' java.net.Socket.getOutputStream on a null object reference.

[sergeushenecz]

Description

When I click for the first time everything is fine. Sometimes I click a second time and it's also good, but there is such a random error

Steps to reproduce

Steps to reproduce the behavior:

const client = TcpSocket.createConnection({
            host: printer.ip,
            port: printer.port,
          }, () => {
            client.write(data);
            client.destroy();
          });

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

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

Current behavior

I have print btn. Attempt to invoke virtual method 'java.io.OutputStream' java.net.Socket.getOutputStream on a null object reference.

Expected behavior

Code to need works.

Screenshots

Relevant information

OS	android
react-native	0.64.3
react-native-tcp-socket	5.6.0

[Rapsssito]

@sergeu90, you must take into account that socket.write() is asynchronous, so, in your code, socket.destroy() might be called first. This will destroy the socket and then try to write to it. That's why you get that error.

A workaround would be to use the callback provided by socket.write() to make sure you destroy the socket after writing.

[sergeushenecz]

@Rapsssito Thanks a lot for helping. It is working.

 client.write(data, null, () => {
              client.destroy();
            });

[Rapsssito]

Glad it worked! I will close the issue now.