Unable to connect to mysql through JDBC connector through Tomcat or externally

Posted by Stefan Kendall on Server Fault See other posts from Server Fault or by Stefan Kendall
Published on 2009-12-01T22:14:30Z Indexed on 2012/09/23 15:40 UTC
Read the original article Hit count: 324

Filed under:

mysql

|

tomcat

|

jdbc

I've installed a stock mysql 5.5 installation, and while I can connect to the mysql service via the mysql command, and the service seems to be running, I cannot connect to it through spring+tomcat or from an external jdbc connector.

I'm using the following URL:

jdbc:mysql://myserver.com:myport/mydb

with proper username/password, but I receive the following message:

server.com: Communications link failure

The last packet sent successfully to the server was 0 milliseconds ago. the driver has not received any packets from the server.

and tomcat throws:

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

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
    sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)

Which seems to be the same issue as if I try to connect externally.

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