.metadata\.log error in eclipse

Delete: /YOUR PATH TO WORKSPACE/.metadata/.plugins/org.eclipse.core.resources

Update 2018 I do not recommend this answer anymore. I was tested it 2014 and it was working for me for older eclipse IDE at that time. I m not using eclipse anymore for development. I recommended using an android studio for android development. Thank you

1) You have to delete the folder metadata in your workspace.

2) Start Eclipse as usual - the folder metadata is newly creating by starting Eclipse

If your operation system is Mac OS and you are using version of Java 1.9 this error occurs and eclipse don't start up. So you need to downgrade your java version to 1.8 release until this issue fixed.