Creating a Web Application with Ant and Tomcat 4
Subject:   Name jdbc is not bound in this Context
Date:   2003-01-27 13:51:17
From:   anonymous2
Response to: Name jdbc is not bound in this Context


If you have not put your database's JDBC driver file in Tomcat's common/lib directory, as instructed, you get the message "Couldn't create addressesDB sttribute: Couldn't open connection to Public database: Cannot load JDBC driver class ''". So I don't think this is your problem, but please check it anyway.

Otherwise, you can view your Tomcat configuration by pointing your browser at http://localhost:8080/admin and looking at AddressBook's Context and Data Source Panels [see figures 8 & 9]. Do these panels look correct?

You do not need to reference the context.xml in the web.xml. The information in context.xml gets put in Tomcat's conf/server.xml file automatically by the Ant/Tomcat admin process. Check server.xml out with your favourite text editor. Does this look correct?

Finally, what versions of OS, MySQL, JDBC driver, Tomcat and Ant are you using?


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  • Name jdbc is not bound in this Context
    2003-10-29 17:05:35  anonymous2 [View]

    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