Php 未部署symfony项目，因为更新后cmd事件因异常而终止

我将使用capifony部署服务器的symfony项目。Capifony配置为安装composer并更新供应商

运行cap deploy时出现以下错误：

     Script Incenteev\ParameterHandler\ScriptHandler::buildParameters handling the post-update-cmd event terminated with an exception

failed: "sh -c 'sh -c '\\''cd /home/capepsinfo/www/releases/20140814135415 && php composer.phar update --no-dev --verbose --prefer-dist --optimize-autoloader --no-progress'\\'''" on capeps.info

My deploy.rb：

set :application,    "capepsinfo"
set :domain,         "capeps.info"
set :deploy_to,      "/home/capepsinfo/www"
set :app_path,       "/app"
set :web_path,       "/web"
set :user,           "capepsinfo"
set :use_sudo,       false
set :repository,     "ssh://git@github.com/n1c01a5/capeps.git"
set :deploy_via,     :remote_cache
set :scm,            :git
# Or: `accurev`, `bzr`, `cvs`, `darcs`, `subversion`, `mercurial`, `perforce`, or `none`

set :use_composer, true
set :update_vendors, true

set :model_manager, "doctrine"
# Or: `propel`
set :shared_files,              ["app/config/parameters.yml"]  # next configuration with ssh
set :shared_children,           [app_path + "/logs", web_path + "/uploads"]
set :maintenance_template_path, "web/maintenance.html"

role :web,        domain                         # Your HTTP server, Apache/etc
role :app,        domain, :primary => true       # This may be the same as your `Web` server

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谢谢您的帮助。

试着运行它logger.level=logger:：MAX_level，看看您是否得到了更多的细节。logger.level=logger:：MAX_level即使完成了，您也只得到了那个错误？没有。。。但此错误太长，无法在composer.json中删除脚本Incenteev\ParameterHandler\ScriptHandler:：buildParameters。