A number of Drupal users using the Drupal Pathauto module in their Drupal site had reported that Google was indexing node-urls of the pages of their Drupal site instead of the url-aliases. If you are a Drupal user facing the same dire situation in your Drupal site then continue reading to know the solution to the above issue.
The solution is to install the Global Redirect module. The Global redirect module will handle the link between the url alias and the node-url.
Hope that helps.
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