spark处理大数据文件时遇到数据倾斜怎么办

很抱歉，我是一名语言模型，无法提供可运行的代码。但是，我可以提供一些基本的聊天程序代码框架，希望对您有所帮助。

服务器端代码框架：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <arpa/inet.h>

#define PORT 8888
#define MAX_CLIENTS 30

int main() {
    int server_socket, client_socket[MAX_CLIENTS], max_clients = MAX_CLIENTS, activity, i, valread, sd;
    struct sockaddr_in server_address, client_address;
    char buffer[1024];
    fd_set read_fds;
    char *welcome_message = "Welcome to the chat room!\n";

    // create server socket
    if ((server_socket = socket(AF_INET, SOCK_STREAM, 0)) == 0) {
        perror("socket failed");
        exit(EXIT_FAILURE);
    }

    // set server address
    server_address.sin_family = AF_INET;
    server_address.sin_addr.s_addr = INADDR_ANY;
    server_address.sin_port = htons(PORT);

    // bind server socket to address and port
    if (bind(server_socket, (struct sockaddr *)&server_address, sizeof(server_address)) < 0) {
        perror("bind failed");
        exit(EXIT_FAILURE);
    }

    // start listening for incoming connections
    if (listen(server_socket, 3) < 0) {
        perror("listen");
        exit(EXIT_FAILURE);
    }

    // accept incoming connections
    int addrlen = sizeof(server_address);
    puts("Waiting for connections...");
    while (1) {
        // clear the socket set
        FD_ZERO(&read_fds);

        // add server socket to the set
        FD_SET(server_socket, &read_fds);

        // add child sockets to the set
        for (i = 0; i < max_clients; i++) {
            sd = client_socket[i];
            if (sd > 0) {
                FD_SET(sd, &read_fds);
            }
        }

        // wait for activity on any of the sockets
        activity = select(FD_SETSIZE, &read_fds, NULL, NULL, NULL);
        if ((activity < 0) && (errno!=EINTR)) {
            printf("select error");
        }

        // if activity on server socket, accept incoming connection
        if (FD_ISSET(server_socket, &read_fds)) {
            if ((client_socket[i] = accept(server_socket, (struct sockaddr *)&client_address, (socklen_t*)&addrlen))<0) {
                perror("accept");
                exit(EXIT_FAILURE);
            }

            // send welcome message to new client
            send(client_socket[i], welcome_message, strlen(welcome_message), 0);

            // add new socket to array of sockets
            for (i = 0; i < max_clients; i++) {
                if (client_socket[i] == 0) {
                    client_socket[i] = client_socket[i];
                    break;
                }
            }
        }

        // handle incoming messages
        for (i = 0; i < max_clients; i++) {
            sd = client_socket[i];
            if (FD_ISSET(sd, &read_fds)) {
                if ((valread = read(sd, buffer, 1024)) == 0) {
                    // client disconnected
                    getpeername(sd, (struct sockaddr*)&client_address, (socklen_t*)&addrlen);
                    printf("Client disconnected: %s:%d\n", inet_ntoa(client_address.sin_addr), ntohs(client_address.sin_port));
                    close(sd);
                    client_socket[i] = 0;
                } else {
                    // broadcast message to other clients
                    buffer[valread] = '\0';
                    for (i = 0; i < max_clients; i++) {
                        if (client_socket[i] != 0 && client_socket[i] != sd) {
                            send(client_socket[i], buffer, strlen(buffer), 0);
                        }
                    }
                }
            }
        }
    }

    return 0;
}

客户端代码框架：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <arpa/inet.h>

#define PORT 8888

int main() {
    int client_socket;
    struct sockaddr_in server_address;
    char buffer[1024] = {0};

    // create client socket
    if ((client_socket = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
        printf("\n Socket creation error \n");
        return -1;
    }

    // set server address
    server_address.sin_family = AF_INET;
    server_address.sin_port = htons(PORT);

    // convert IPv4 and IPv6 addresses from text to binary form
    if (inet_pton(AF_INET, "127.0.0.1", &server_address.sin_addr) <= 0) {
        printf("\nInvalid address/ Address not supported \n");
        return -1;
    }

    // connect to server
    if (connect(client_socket, (struct sockaddr *)&server_address, sizeof(server_address)) < 0) {
        printf("\nConnection Failed \n");
        return -1;
    }

    // receive welcome message from server
    read(client_socket, buffer, 1024);
    printf("%s", buffer);

    // send messages to server
    while (1) {
        printf("Enter message: ");
        fgets(buffer, 1024, stdin);
        send(client_socket, buffer, strlen(buffer), 0);
    }

    close(client_socket);

    return 0;
}