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mysql.jdbc.exceptions.jdbc4 Communication link error

 
Ranch Hand
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Hi all,
I have downloaded the MySQL Connector J and put it in apache\common\lib as well as on the classpath.I have not yet managed to use JDBC because I continue getting a com.mysql.jdbc.exception.jdbc4 Communication link error....
I have configured resources inside my web.xml and have double checked that the usernames,passwords,tablenames etc are correct.....
What else should I check??
 
Greenhorn
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Is there more detail information such as exception stack?
 
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