What causes AerospikeException: java.io.EOFException?

Client Libraries Java Client
10

EOFException is thrown when the socket connection is no longer valid. It usually happens because the server (not client) has closed the connection. Here is the relevant read code in the client.

 /**
  * Read till byteBuffer limit reached or received would-block.
  */
public boolean read(ByteBuffer byteBuffer) throws IOException {
    while (byteBuffer.hasRemaining()) {
        int len = socketChannel.read(byteBuffer);

        if (len == 0) {         
            // Got would-block.
            return false;
        }

        if (len < 0) {
            // Server has shutdown socket.
            throw new EOFException();
        }
    }
    return true;
}