Yesterday, a user of my qa site http://www.fotocomefare.com/domanderisposte/ reported the following error.
Could not establish database connection. Please check the username, password and hostname in the config file, and if necessary set up the appropriate MySQL user and privileges.
I saw it only once, before making it public. I and other users have already posted questions and answers with no problem.
What are the causes for this error and how can it be avoided?
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