When my application is running, I restarted mysql. Then I try to query again, it gives me the following error:


javax.servlet.ServletException: net.sf.hibernate.JDBCException: Could not
execute query: Communication link failure


Anybody knows what's the reason?

Thanks a lot!

Configure your connection pool to validate connections before handing them out. Depends on which pool you use, so please read the manual / pool documentation.