在OSX上安装Mysql gem时出现错误-“Marshal data too short”

Question

尝试在OSX上安装mysql gem时出现“marshal data too short”错误。我听到了清除.gems的建议，但似乎在系统中找不到它。有人能提供帮助吗？

apple$ sudo gem install mysql --backtrace --debug
Exception `NameError' at /Library/Ruby/Site/1.8/rubygems/command_manager.rb:161 - uninitialized constant Gem::Commands::InstallCommand
Exception `Gem::LoadError' at /Library/Ruby/Site/1.8/rubygems.rb:826 - Could not find RubyGem test-unit (>= 0)

Exception `ArgumentError' at /Library/Ruby/Site/1.8/rubygems/spec_fetcher.rb:111 - marshal data too short
ERROR:  While executing gem ... (ArgumentError)
    marshal data too short
    /Library/Ruby/Site/1.8/rubygems/spec_fetcher.rb:111:in `load'
    /Library/Ruby/Site/1.8/rubygems/spec_fetcher.rb:111:in `fetch_spec'
    /Library/Ruby/Site/1.8/rubygems/spec_fetcher.rb:71:in `fetch'
    /Library/Ruby/Site/1.8/rubygems/spec_fetcher.rb:70:in `map'
    /Library/Ruby/Site/1.8/rubygems/spec_fetcher.rb:70:in `fetch'
    /Library/Ruby/Site/1.8/rubygems/dependency_installer.rb:99:in `find_gems_with_sources'
    /Library/Ruby/Site/1.8/rubygems/dependency_installer.rb:192:in `find_spec_by_name_and_version'
    /Library/Ruby/Site/1.8/rubygems/dependency_installer.rb:213:in `install'
    /Library/Ruby/Site/1.8/rubygems/commands/install_command.rb:118:in `execute'
    /Library/Ruby/Site/1.8/rubygems/commands/install_command.rb:115:in `each'
    /Library/Ruby/Site/1.8/rubygems/commands/install_command.rb:115:in `execute'
    /Library/Ruby/Site/1.8/rubygems/command.rb:257:in `invoke'
    /Library/Ruby/Site/1.8/rubygems/command_manager.rb:132:in `process_args'
    /Library/Ruby/Site/1.8/rubygems/command_manager.rb:102:in `run'
    /Library/Ruby/Site/1.8/rubygems/gem_runner.rb:58:in `run'
    /usr/bin/gem:21

Answer 1

如果我使用gem，我会在我的windows机器上得到同样的错误。

ERROR:  While executing gem ... (ArgumentError)    
marshal data too short

删除gem缓存目录"c:\Documents and Settings\MyUser.gem“对我来说很有效。即使你重新安装ruby，似乎也会保存一些数据。可能缓存的文件已损坏。

Answer 2

尝试使用下面的命令。提供您的OS X中mysql目录的位置。

sudo gem install mysql -with-mysql-dir=/usr/local/mysql

http://hivelogic.com/articles/installing-mysql-on-mac-os-x/

如果您没有正确安装Mysql，请检查在Mac OSX上安装Mysql的链接。

祝你好运！

Answer 3

此外，.gem目录位于您的主目录中：/Users/yourname/.gem

希望这能有所帮助。