fatal: [192.168.38.230]: FAILED! => {"msg": "The task includes an option with an undefined variable. The error was: 'user' is undefined\n\nThe error appears to be in '/opt/bigdata/hive/roles/hive/tasks/install_hive.yml': line 2, column 3, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n---\n- name: Copy Hive\n ^ here\n"}

看起来这个错误是因为在该playbook中的某个地方使用了未定义的变量'user'。您需要检查playbook中是否定义了这个变量，或者在运行playbook时传递该变量。您可以使用`--extra-vars`选项将变量传递给playbook，例如：

ansible-playbook myplaybook.yml --extra-vars "user=your_user"

或者您可以将变量定义在inventory文件中，然后在playbook中引用该变量。