今天在使用Drush时突然发现无法使用了，提示错误：

Drush command terminated abnormally due to an unrecoverable error.   [error]

经测试，不是Drush配置问题，也不是Drupal内核的问题，在于我写的一个模块hook_init() 函数是跳转引起的，导致Drush进入死循环。

查看Drush Debug信息：

$ drush -v -d status
Bootstrap to phase 0. [0 sec, 1.86 MB]                               [bootstrap]
Drush bootstrap phase : _drush_bootstrap_drush() [0.01 sec, 1.98 MB] [bootstrap]
Loading drushrc                                                      [bootstrap]
"/Applications/rubystack/apps/drupal/drush/drushrc.php" into "drush"
scope. [0.01 sec, 1.98 MB]
Cache MISS cid: 6.0-commandfiles-0-b85971c7841e4094247c123114aed123      [debug]
[0.01 sec, 1.99 MB]
Cache SET cid: 6.0-commandfiles-0-b85971c7841e4094247c123114aed123       [debug]
[0.01 sec, 2.01 MB]
Bootstrap to phase 0. [0.05 sec, 5.34 MB]                            [bootstrap]
Drush bootstrap phase : _drush_bootstrap_drupal_root() [0.07 sec,    [bootstrap]
5.35 MB]
Initialized Drupal 7.26 root directory at                               [notice]
/Applications/rubystack/apps/drupal/htdocs [0.08 sec, 6.21
MB] www.111cn.net
Drush bootstrap phase : _drush_bootstrap_drupal_site() [0.08 sec,    [bootstrap]
6.22 MB]
Initialized Drupal site default at sites/default [0.08 sec, 6.22 MB]    [notice]
Cache MISS cid: 6.0-install_profile-66ecfeb9791a023150773849f1550c5d     [debug]
[0.08 sec, 6.22 MB]
Cache MISS cid: 6.0-commandfiles-2-90b5571ff64221f80c3320ec33b2ed28      [debug]
[0.08 sec, 6.22 MB]
Cache SET cid: 6.0-commandfiles-2-90b5571ff64221f80c3320ec33b2ed28       [debug]
[0.09 sec, 6.23 MB]
Drush bootstrap phase : _drush_bootstrap_drupal_configuration() [0.09[bootstrap]
sec, 6.24 MB]
Drush bootstrap phase : _drush_bootstrap_drupal_database() [0.1 sec, [bootstrap]
7.86 MB]
Successfully connected to the Drupal database. [0.1 sec, 7.86 MB]    [bootstrap]
Drush bootstrap phase : _drush_bootstrap_drupal_full() [0.1 sec, 7.86[bootstrap]
MB]
Drush command terminated abnormally due to an unrecoverable error.   [error]
[0.19 sec, 21.9 MB]根据以上Debug，判断Drush没有问题，是Drupal中的hook引起的。

解决方法
如果你也遇到此种情况，请检查一下你的自定义模块中的一个钩子，如：

hook_init
hook_boot

Drush 是通过PHP CLI命令行模式运行的，CLI的PHP配置环境和 Apache等使用的PHP.ini 有所差别。如果访问网站没问题，通过CLI访问有问题的话，说明你写的钩子代码存在问题。

来自 http://www.111cn.net/sys/linux/58961.htm