Try this:

1) Verify if you put the mysql-connector-java-5.1.15-bin.jar in correct
place. See http://tomcat.apache.org/tomcat-6.0-doc/class-loader-howto.html.

2) What version of mysql you use? Is the driver for this version? If yes
perhaps the jar is corrupt. Try download it again

3) Delete mysql-connector-java-5.1.15-bin.jar from WEB-INF/lib/ if you have
in your war.

Juan

2011/3/17 Erel Segal <[email protected]>

> It doesn't work at Tomcat either, but I don't know if the problems are
> related. This is what I did regarding Tomcat:
>
> * I put the file "mysql-connector-java-5.1.15-bin.jar" in Tomcat's
> lib/ folder;
>
> * I edited the file conf/context.xml to declare a resource:
> <Context>
>    <WatchedResource>WEB-INF/web.xml</WatchedResource>
>    <Resource name="jdbc/TestDB" auth="Container"
> type="javax.sql.DataSource"
>               maxActive="100" maxIdle="30" maxWait="10000"
>               username="[username]" password="[password]"
> driverClassName="com.mysql.jdbc.Driver"
>               url="jdbc:mysql://localhost:3306/gwtchat"/>
> </Context>
>
> * I edited my application's web.xml file to declare a resource:
>
> <web-app>
>  <servlet>
>    <servlet-name>chatroom</servlet-name>
>    <servlet-class>gwtchat.server.ChatRoomServiceImpl</servlet-class>
>  </servlet>
>  <servlet-mapping>
>    <servlet-name>chatroom</servlet-name>
>    <url-pattern>/gwtchat/chatroom</url-pattern>
>  </servlet-mapping>
>  <servlet-mapping>
>    <servlet-name>chatroom</servlet-name>
>    <url-pattern>/wizardofoz/chatroom</url-pattern>
>  </servlet-mapping>
>  <resource-ref>
>      <description>DB Connection</description>
>      <res-ref-name>jdbc/TestDB</res-ref-name>
>      <res-type>javax.sql.DataSource</res-type>
>      <res-auth>Container</res-auth>
>  </resource-ref>
> </web-app>
>
> * I restarted Tomcat.
>
> Now, in the Tomcat log file, I get the following exception:
> "No suitable driver found for jdbc:mysql://localhost:3306/gwtchat?..."
>
>
>
> On 15 מרץ, 13:16, Juan Pablo Gardella <[email protected]>
> wrote:
> > It seems that your classpath is good. When you said:
> >
> > "But then I restarted the server (from the eclipse "development pane"),
> > and I started getting errors saying that the server cannot find a
> > driver for jdbc:mysql connection!"
> >
> > You want to "deploy" the app in a servlet container?. Try make a war and
> put
> > in it and test. Tell me if the error persist
> >
> > Juan
> >
> > 2011/3/15 Erel Segal <[email protected]>
> >
> > > Here it is:
> >
> > > <?xml version="1.0" encoding="UTF-8"?>
> > > <classpath>
> > >        <classpathentry kind="src" path="src"/>
> > >        <classpathentry kind="src" output="test-classes" path="test"/>
> > >        <classpathentry kind="con"
> > > path="com.google.gwt.eclipse.core.GWT_CONTAINER"/>
> > >        <classpathentry kind="con"
> > > path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
> > >        <classpathentry combineaccessrules="false" kind="src" path="/
> > > GeniusBI"/>
> > >        <classpathentry kind="lib"
> path="/home/<username>/workspace/gwtchat/
> > > war/WEB-INF/lib/mysql-connector-java-5.1.15-bin.jar"/>
> > >        <classpathentry kind="output" path="war/WEB-INF/classes"/>
> > > </classpath>
> >
> > > On 9 מרץ, 18:49, Juan Pablo Gardella <[email protected]>
> > > wrote:
> > > > Is classpath error problem. Show the .classpath file
> >
> > > > Juan
> >
> > > > 2011/3/9 Erel Segal <[email protected]>
> >
> > > > > I added a mysql server to the default GWT application. I put the
> mysql
> > > > > connector jar in the lib folder under WEBINF, and also added it to
> the
> > > > > build path. I ran the web application in development mode and it
> > > > > worked fine.
> >
> > > > > But then I restarted the server (from the eclipse "development
> pane"),
> > > > > and I started getting errors saying that the server cannot find a
> > > > > driver for jdbc:mysql connection!
> >
> > > > > Can you please help me?
> >
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