@Boris给出的答案在99%的情况下是正确的，但是如果您在旧版本的Eclipse中打开工作区，也可能发生这种情况。用Juno导入/创建的工作区在Galileo中打开时将抛出此错误。

下面是解决这个问题的几个步骤。4步对我来说很有用。

Delete .log files along .metadata folder. Check the current user permission make sure to check the full control checkbox click apply then OK. If you run system drive defragmentation or maintenance before you run eclipse editor sometimes original file path are not in their respective path to make sure run "previous version" time before your system maintenance of your drive where the eclipse workbench or something similar to this was saved. This last option is works for me. Check the drive letter of your current drive where the code editor was saved. If something unusual e.g before your maintenance your drive letter is K then after defragment or maintenance. The drive letter is now L hence you should change the drive letter to its original one that is K. to do this click the ff: Open control panel System & security Administrative tools Computer management Disk management in disk mngt choose the Drive example L then right click > change drive letter & path > click remove > then ok, open it again then > click add and > choose your original drive letter for that drive then click ok. If you use your computer for a long period of time do restart first to refresh everything.

进入任务管理器(在任务栏中单击右键)，选择进程菜单栏，选择eclipse.exe，单击EndProcess

在管理员模式下运行eclipse为我解决了这个问题。您可以通过[右键单击]->在安装目录下以管理员身份运行eclipse.exe。

我在win7机器的工作环境中具有限制性权限。我还删除了.lock和.log文件，但这并没有帮助。它也可以是所有这些因素的结合。

删除日志和.lock不起作用，但是

-clean选项为我修复了它。

看起来你的工作空间是在Java TM中使用的，打开任务管理器并关闭eclipse.exe和Java TM进程。