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  Creating a Web Application with Ant and Tomcat 4
Subject:   Name jdbc is not bound in this Context
Date:   2003-10-29 17:05:35
From:   anonymous2
Response to: Name jdbc is not bound in this Context

I've met same problem when I use 'mysql 4.1 server", "mysql-connector-java-3.0.9-stable-bin.jar", and "tomcat 4.1.27 web server".

Originally, I use JBuilder, mysql 4.1, tomcat 4.0 to test my pure 'servlets' web application and it works well.

After, I move my web application into pure Tomcat 4.1.27 and compiled with ant. Though "ant compile" and "ant install" are ok, but the a method call from servlet to database connection always fails.

The error message is "Couldn't open connection to database(in DBAgent): Name jdbc is not bound in this Context" in the db log file.

Those displays on the screen are
"HTTP Status 500 -


type Exception report


description The server encountered an internal error () that prevented it from fulfilling this request.




I can see the correct context for dataresource in http://localhost:8080/admin.

The lines I added to the server.xml are "
<!-- Dragon Context -->
<Context path="/dragon" docBase="dragon"
debug="5" reloadable="true" crossContext="true">

<Logger className="org.apache.catalina.logger.FileLogger"
prefix="localhost_DBTest_log." suffix=".txt"

<Resource name="jdbc/diary"
<ResourceLink name="jdbc/diary"
type="javax.sql.DataSource" />

<ResourceParams name="jdbc/diary">
<!-- Class name for mm.mysql JDBC driver -->

<!-- The JDBC connection url for connecting to your MySQL dB.
The autoReconnect=true argument to the url makes sure that the
mm.mysql JDBC Driver will automatically reconnect if mysqld closed the
connection. mysqld by default closes idle connections after 8 hours.

<!-- Maximum number of dB connections in pool. Make sure you
configure your mysqld max_connections large enough to handle
all of your db connections. Set to 0 for no limit.

<!-- Maximum number of idle dB connections to retain in pool.
Set to 0 for no limit.

<!-- Maximum time to wait for a dB connection to become available
in ms, in this example 10 seconds. An Exception is thrown if
this timeout is exceeded. Set to -1 to wait indefinitely.

<!-- MySQL dB username and password for dB connections -->

Please help solve the problem.

Thanks a lot.

Julia Berlo