flipped-aurora/gin-vue-admin · error

启动 MCP 独立服务失败: %w

Error message

启动 MCP 独立服务失败: %w

What it means

Thrown by StartManagedStandalone when os/exec's cmd.Start() fails to launch the detached MCP standalone binary process. The command was fully prepared (stdout/stderr to a log file, GVA_MCP_CONFIG env, detached attributes) but the OS refused or failed to spawn it.

Source

Thrown at server/mcp/standalone_manager.go:178

		return GetManagedStandaloneStatus(context.Background()), err
	}

	logPath := filepath.Join(runtimeDir, mcpRuntimeLogName)
	logFile, err := os.OpenFile(logPath, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0o644)
	if err != nil {
		return GetManagedStandaloneStatus(context.Background()), err
	}
	defer logFile.Close()

	cmd := exec.Command(commandPath, commandArgs...)
	cmd.Dir = workDir
	cmd.Stdout = logFile
	cmd.Stderr = logFile
	cmd.Env = append(os.Environ(), "GVA_MCP_CONFIG="+configPath)
	prepareDetachedProcess(cmd)

	if err := cmd.Start(); err != nil {
		return GetManagedStandaloneStatus(context.Background()), fmt.Errorf("启动 MCP 独立服务失败: %w", err)
	}

	pid := cmd.Process.Pid
	_ = cmd.Process.Release()

	meta = &managedProcessMeta{
		PID:        pid,
		StartedAt:  time.Now().Format(time.RFC3339),
		LogPath:    logPath,
		ConfigPath: configPath,
		WorkDir:    workDir,
		Command:    commandPath,
		Args:       append([]string{}, commandArgs...),
	}
	if err := writeManagedProcessMeta(meta); err != nil {
		return GetManagedStandaloneStatus(context.Background()), err
	}

View on GitHub (pinned to 3136500ef3)

Solutions

1. Check the cause in the wrapped error: 'permission denied' -> chmod +x or fix noexec mount; 'exec format error' -> rebuild for the host OS/arch.
2. Ensure the log file path (meta.LogPath directory) exists and is writable.
3. Rebuild the binary with the project's build command for the current platform.
4. Check ulimit/nproc and container security policies if under heavy load or restricted runtime.

Example fix

// check before starting
if err := os.Chmod(binaryPath, 0o755); err != nil { return err }
if runtime.GOOS != expectedOS {
    return fmt.Errorf("binary built for %s, host is %s", expectedOS, runtime.GOOS)
}
status, err := StartManagedStandalone(ctx)

info, err := os.Stat(binaryPath)
if err != nil { return err }
if info.Mode()&0o111 == 0 { return fmt.Errorf("%s is not executable", binaryPath) }
if runtime.GOOS != buildOS { return fmt.Errorf("arch/OS mismatch: built for %s", buildOS) }

status, err := StartManagedStandalone(ctx)
if err != nil {
    if strings.Contains(err.Error(), "permission denied") {
        os.Chmod(binaryPath, 0o755) // or remount without noexec
    }
    return err
}

When it happens

Trigger: cmd.Start() returns error: binary not executable (missing +x), binary arch mismatch, missing dynamic libs, log file not writable, fork/exec failure on the platform, resource limits (too many processes).

Common situations: Built binary copied from another OS/arch (e.g. darwin binary on linux); running in a container without exec permission on the volume (noexec mount); log file directory permissions changed; PID/process limits hit.

Related errors

• 停用 MCP 独立服务失败: %w
• 未找到 MCP 独立配置文件，请在当前目录、cmd/mcp 目录或通过 -config / GVA_MCP_CONFIG
• 未能自动识别项目根目录，请在 MCP 配置中设置 autocode.root
• go.mod 中未找到 module 定义
• path 参数是必需的

AI-assisted analysis of flipped-aurora/gin-vue-admin@3136500ef3 (2026-08-31). Data as JSON: /api/errors/1e8bd7e66f6ceaa2. Report an issue: GitHub.