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com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

 
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I don't have any clue.

 
Vikas Kapoor
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Sorry for the long post. I tried to copy all whole stack trace.

Other Information :

- I am using Spring framework, Hibernate and MySQL database. I have tried with Apache Tomcat and JBoss servers.
- Application tries to execute a query and it fails because it can't connect to the database.

I don't know to which forum this question belongs.

I use Tomcat lookup,

as well as tried to put

url="jdbc:mysql://server:3307/database?autoReconnect=true"/> too.

but why the hell I can not get rid of this error.
 
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