Spring Boot, Connection abort (socket)

1. Existing Spring Boot v2.2 0 application. Java 1.8 / Windows 10. Netbeans 8.2.

2. Configurable TCP server and clients with routing between them and a yml configuration file.

3. Mostly working but breaks occasionally when TCP clients disconnect, then reconnect and send commands.

SecondaryConnectionHandler Error writing data:
java.net.SocketException: Software caused connection abort: socket write error

4. My guess is that the Spring application is not correctly releasing the socket / port when an external client disconnects and another external client reconnects to the same or a different port and sends commands, but this is a guess. Spring seems prone to these issues.

5. Needs stress testing to determine why issues occur and then a fix (must not break, must recover itself if a socket error occurs).

6. Also significantly loading / slowing the PC on which it is running, especially when errors occur, even with only one or two connections.

7. Please only show an interest in this work if you have considerable experience working with Spring, Java, TCP sockets and Clients / Servers.