Go Routines Sharing The Same Net.Conn Connection Hang On Read After One Routine Exits Mới Update

If multiple goroutines are sharing the same net.Conn connection and one of the goroutines exits, it can cause the other goroutines to hang on read operations. This is because the net.Conn interface represents a stream-oriented network connection, which means that data is read from the connection in a sequential order.

When a goroutine exits, it may leave unread data in the connection’s read buffer, which can cause subsequent reads by the other goroutines to block, waiting for more data that may never arrive. To avoid this issue, it’s important to properly synchronize access to the net.Conn connection between the different goroutines.

One way to do this is to use a mutex to ensure that only one goroutine is reading or writing to the connection at a time. For example:

go
var connMutex sync.Mutex

func readFromConn(conn net.Conn) {
    connMutex.Lock()
    defer connMutex.Unlock()

    // Read data from the connection
}

func writeToConn(conn net.Conn) {
    connMutex.Lock()
    defer connMutex.Unlock()

    // Write data to the connection
}

In this example, the connMutex mutex is used to synchronize access to the conn connection. Before performing any read or write operation on the connection, the goroutine first acquires the mutex using connMutex.Lock(), and then releases it using connMutex.Unlock() when the operation is complete.

By using a mutex to synchronize access to the net.Conn connection, you can ensure that all goroutines are properly coordinated when reading and writing data, and avoid potential issues with hanging on read operations.

When the main() function in a Go program exits, all remaining Goroutines in that program will be terminated.

This means that any Goroutines that are still running when main() exits will be stopped abruptly and their execution will be terminated. Any unfinished work or resources held by these Goroutines may be left in an inconsistent state, which can lead to issues such as memory leaks or data corruption.

In order to avoid this, it’s important to ensure that all Goroutines in a Go program complete their work before main() exits. This can be achieved by using synchronization mechanisms such as channels or wait groups to coordinate the termination of Goroutines.

It’s also worth noting that the Go runtime will not wait for all Goroutines to complete before exiting main(). If there are any running Goroutines, the runtime will print a message indicating that they were not terminated and then exit the program.