eclipse problem shooting

1. When open a resource in the eclipse/yoxos, it will popup an error dialog saying:

cannot initialize module TreeWalker - Unable to instantiate DoubleCheckedLocking

Solutions:

1) go to: preference --> checkstyle to find the element:Treewalker, uncheck the checkbox:"DoubleCheckedLocking".



2) Sometimes, with the above solution, you can't uncheck the checkbox:"DoubleCheckedLocking".

Another solution, find the checkstyle file and remove the code:

<module name="DoubleCheckedLocking">
<property name="severity" value="error"/>
</module>

3) possible solution:

Since it is caused by old version of the checkstyle plugin, maybe upgrading the plugin can resolve the problem.

Haven't tried yet.

related url:
http://stackoverflow.com/questions/12795935/checkstyle-eclipse-plugin-doesnt-work