MuntashirAkon/AppManager · error

Error! Fork failed: \n

Error message

Error! Fork failed: %s\n

What it means

fork() returned a negative pid in main() when trying to background the local server. The fork itself failed — the child process was never created — typically due to hitting the process count limit (EAGAIN) or lack of memory (ENOMEM). The parent unlinks the copied jars, frees exec_argv, and returns failure.

Solutions

1. Retry the fork after transient resource exhaustion (EAGAIN)
2. Check and raise RLIMIT_NPROC / process limits on the device
3. Free or close unused descriptors and memory before forking to reduce ENOMEM risk

When it happens

Trigger: Thrown at app/src/main/cpp/run_server.c:235 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of MuntashirAkon/AppManager@0152f468fc (2026-09-12). Data as JSON: /api/errors/e893a811ca74dd20. Report an issue: GitHub.

Appendix: source

Thrown at app/src/main/cpp/run_server.c:235

    snprintf(nice_name_buf, sizeof(nice_name_buf), "--nice-name=%s", SERVER_NAME);
    exec_argv[2] = nice_name_buf;

    exec_argv[3] = JAR_MAIN_CLASS;
    exec_argv[4] = args_buf;

    for (int i = 0; i < extra_args_count; i++) {
        exec_argv[5 + i] = argv[8 + i];
    }
    exec_argv[exec_argc - 1] = NULL;

    printf("Local server has started.\n");
    fflush(stdout);

    // Start in the background
    pid_t pid = fork();

    if (pid < 0) {
        fprintf(stderr, "Error! Fork failed: %s\n", strerror(errno));
        unlink(exec_jar_path);
        free(exec_argv);
        return 1;
    }

    if (pid > 0) {
        // Parent process exits successfully
        printf("Local server started successfully (PID: %d).\n", pid);
        free(exec_argv);
        return 0;
    }

    // Detach the background process
    if (setsid() < 0) {
        unlink(exec_jar_path);
        exit(1);
    }

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