If your realm declaration is:
> <Realm
> className="org.apache.catalina.realm.JDBCRealm"
>       debug="99"
> driverName="org.gjt.mm.mysql.Driver"
> connectionURL="jdbc:mysql://localhost/authority"
> connectionName="test" connectionPassword="test"
>   userTable="users" userNameCol="user_name"
>               userCredCol="user_pass"
> userRoleTable="user_roles" roleNameCol="role_name" />

Then tomcat will try to connect to localhost for the database "authority"
with the user id and password being test. (If I read the props above
correctly). If that connection fails when the Realm is created (which is at
tomcat startup) - then tomcat will not startup.

-Tim

Caroline Jen wrote:

> Tim, sorry, I do not understand "Since you didn't
> replace your connection information with the dummy
> JDBCRealm placeholder, the connection failed to the
> database."
>
> Now, I am testing the Tomcat using the existing code
> in the server.xml file by simply removing the
> surroundinging <!-- and -->. (I understand what you
> said about &amp;)
>
> I could not start the Tomcat server.
>
> 1) I put <!-- and --> around the UserDababaseRealm as
> shown below:
>
> <!--
> <Realm
> className="org.apache.catalina.realm.UserDatabaseRealm"
>        debug="0"
> resourceName="UserDatabase"/>
> -->
>
> 2) I removed the <!-- and --> around the JDBCRealm
> for MySql (I do not insert any of my code, I simply
> use the existing code in the server.xml). See below:
>
> <Realm
> className="org.apache.catalina.realm.JDBCRealm"
>       debug="99"
> driverName="org.gjt.mm.mysql.Driver"
> connectionURL="jdbc:mysql://localhost/authority"
> connectionName="test" connectionPassword="test"
>   userTable="users" userNameCol="user_name"
>               userCredCol="user_pass"
> userRoleTable="user_roles" roleNameCol="role_name" />
>
> I saved the file and I could not start the Tomcat
> server.
>
> -Caroline
>
>



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